UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-K
ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934
For the Fiscal Year Ended December 31, 2017
Commission file number 1-5153
ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the Fiscal Year Ended
December 31, 2019
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from _____ to _____
Commission file number1-1513
mro_logob20.jpg
Marathon Oil Corporation
(Exact name of registrant as specified in its charter)
Delaware 25-0996816
(State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.)
5555 San Felipe Street, Houston, TXTexas 77056-2723
(Address of principal executive offices)
(713) 629-6600
(Registrant’s telephone number, including area code)
Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading Symbol Name of each exchange on which registered
Common Stock, par value $1.00 MRONew York Stock Exchange
Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.  YesþNo o
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.  YesoNoþ
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934 during the preceding 12 months and (2) has been subject to such filing requirements for the past 90 days.  Yesþ No o
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yesþ No o
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  þ

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of "large“large accelerated filer," "accelerated filer"” “accelerated filer”, "smaller“smaller reporting company," and "emerging“emerging growth company"company” in Rule 12b-2 of the Exchange Act.
Large accelerated filerþAccelerated filer
o
Non-accelerated filer
Accelerated filer o
Non-accelerated filer o
(Do not check if a smaller reporting company)
Smaller reporting companyo
Emerging growth companyo  

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).  Yes oNo   þ
The aggregate market value of Common Stock held by non-affiliates as of June 30, 2017: $10,0502019: $11,398 million. This amount is based on the closing price of the registrant’s Common Stock on the New York Stock Exchange on that date. Shares of Common Stock held by executive officers and directors of the registrant are not included in the computation. The registrant, solely for the purpose of this required presentation, has deemed its directors and executive officers to be affiliates.
There were 849,755,866795,849,999 shares of Marathon Oil Corporation Common Stock outstanding as of February 14, 2018.2020.
Documents Incorporated By Reference:
Portions of the registrant’s proxy statement relating to its 20182020 Annual Meeting of Stockholders, to be filed with the Securities and Exchange Commission pursuant to Regulation 14A under the Securities Exchange Act of 1934, are incorporated by reference to the extent set forth in Part III, Items 10-14 of this report.




MARATHON OIL CORPORATION
Unless the context otherwise indicates, references to "Marathon“Marathon Oil," "we," "our"” “we,” “our” or "us"“us” in this Annual Report on Form 10-K are references to Marathon Oil Corporation, including its wholly owned and majority-owned subsidiaries, and its ownership interests in equity method investees (corporate entities, partnerships, limited liability companies and other ventures over which Marathon Oil exerts significant influence by virtue of its ownership interest).
Table of Contents
 




 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
   
 
 
 
 
 
   
 
  




Definitions
Throughout this report, the following company or industry specific terms and abbreviations are used.
AMPCO – Atlantic Methanol Production Company LLC, a company located in Equatorial Guinea in which we own a 45% equity interest.
AMT – Alternative minimum tax.
AOSP – Athabasca Oil Sands Project, an oil sands mining, transportation and upgrading joint venture located in Alberta, Canada, in which we held a 20% non-operated working interest.
bbl – One stock tank barrel, which is 42 United States gallons liquid volume.
bcf – Billion cubic feet.
boe – Barrels of oil equivalent.
btu – British thermal unit, an energy equivalence measure.
BLM – Bureau of Land Management.
Capital Development Program Budget – Includes capital expenditures, cash investments in equity method investees and other investments, exploration costs that are expensed as incurred rather than capitalized, such as geological and geophysical costs and certain staff costs, and other miscellaneous investment expenditures.
CWA – Clean Water Act.
Development Capital Budget – Includes expenditures, investments and costs associated with the Capital Budget excludingresource play exploration (“REx”).
DD&A – Depreciation, depletion and amortization.
Development well – A well drilled within the proved area of an oil or natural gas reservoir to the depth of a stratigraphic horizon known to be productive.
Dry well – A well found to be incapable of producing either oil or natural gas in sufficient quantities to justify completion.completion as an oil or gas well.
E.G. – Equatorial Guinea.
EGHoldings – Equatorial Guinea LNG Holdings Limited, a liquefied natural gas production company located in E.G. in which we own a 60% equity interest.
EPA – United States Environmental Protection Agency.
E&P – Exploration and production.
Exploratory well – A well drilled to find oil or natural gas in an unproved area or find a new reservoir in a field previously found to be productive in another reservoir.
FASB – Financial Accounting Standards Board.
Henry Hub price – a natural gas benchmark price quoted at settlement date average.
IRS – United States Internal Revenue Service.
Kurdistan – Kurdistan Region of Iraq.
LIBOR – London Interbank Offered Rate.
LNG – Liquefied natural gas.
LPG – Liquefied petroleum gas.
Liquid hydrocarbons or liquids – Collectively, crude oil, condensate and natural gas liquids.
LLS – Louisiana Light Sweet crude oil, an oil index benchmark price as per Bloomberg Finance LLP: LLS St. James.
MEH – Magellan East Houston, an oil index benchmark price of WTI at Magellan East Houston.
Marathon Oil – Marathon Oil Corporation, including wholly owned and majority-owned subsidiaries, and ownership interests in equity method investees (corporate entities, partnerships, limited liability companies and other ventures over which Marathon Oil exerts significant influence by virtue of its consolidated subsidiaries: theownership interest). The company as it exists following the June 30, 2011 spin-off of the refining, marketing and transportation operations.
mbbld – Thousand barrels per day.

mboed – Thousand barrels of oil equivalent per day.
mcf – Thousand cubic feet.
mmbbl – Million barrels.
mmboe – Million barrels of oil equivalent. Natural gas is converted on the basis of six mcf of gas per one barrel of crude oil equivalent.
mmbtu – Million British thermal units.
mmcfd – Million stabilized cubic feet per day.
mmta – Million metric tonnes per annum.

mt – Metric tonnes.
MPC Marathon Petroleum Corporationmtdthe separate independent company, which owns and operates the refining, marketing and transportation operations.
mt – metric tonnes
mtd – metricMetric tonnes per day.
NAAQS – National Ambient Air Quality Standard.
Net acres or Net wells – The sum of the fractional working interests owned by us in gross acres or gross wells.
NGL or NGLs – Natural gas liquid or natural gas liquids, which are naturally occurring substances found in natural gas, including ethane, butane, isobutane, propane and natural gasoline, which can be collectively removed from produced natural gas, separated into these substances and sold.
NYMEX – New York Mercantile Exchange.
OECD – Organization for Economic Cooperation and Development.
OPEC – Organization of Petroleum Exporting Countries.
Operational availability A term used to measure the ability of an asset to produce to its maximum capacity over a specified period of time, after consideration of internal losses.
Productive well – A well that is not a dry well. Productive wells include producing wells and wells that are mechanically capable of production.
Proved developed reserves – Proved reserves that can be expected to be recovered through existing wells with existing equipment and operating methods or for which the cost of the required equipment is relatively minor compared to the cost of a new well.
Proved reserves – Proved crude oil and condensate, NGLs, natural gas and our historical synthetic crude oil reserves are those quantities of crude oil and condensate, NGLs, natural gas and synthetic crude oil, which, by analysis of geoscience and engineering data, can be estimated with reasonable certainty to be economically producible from a given date forward, from known reservoirs, and under existing economic conditions, operating methods, and government regulations-prior to the time at which contracts providing the right to operate expire, unless evidence indicates that renewal is reasonably certain, regardless of whether deterministic or probabilistic methods are used for the estimation. The project to extract the hydrocarbons must have commenced or the operator must be reasonably certain that it will commence the project within a reasonable time.
Proved undeveloped reserves – Proved reserves that are expected to be recovered from new wells on undrilled acreage, or from existing wells where a relatively major expenditure is required for recompletion. Undrilled locations can be classified as having proved undeveloped reserves if a development plan has been adopted indicating that they are scheduled to be drilled within five years, unless the specific circumstances justify a longer time. Reserves on undrilled acreage shall be limited to those directly offsetting development spacing areas that are reasonably certain of production when drilled, unless evidence using reliable technology exists that establishes reasonable certainty of economic viability at greater distances.
Reserve replacement ratio – A ratio which measures the amount of proved reserves added to our reserve base during the year relative to the amount of liquid hydrocarbons and natural gas produced.
REx – Resource play exploration.
Royalty interest – An interest in an oil or natural gas property entitling the owner to a share of oil or natural gas production free of costs of production.
SAR or SARs – Stock appreciation right or stock appreciation rights.
SCOOP – South Central Oklahoma Oil Province.
SEC – United States Securities and Exchange Commission.

Seismic – An exploration method of sending energy waves or sound waves into the earth and recording the wave reflections to indicate the type, size, shape and depth of subsurface rock formation (3-D seismic provides three-dimensional pictures and 4-D factors in changes that occurred over time).
STACK – Sooner Trend (oil field), Anadarko (basin), Canadian (and) Kingfisher (counties). in Oklahoma.
TD Total depthor the bottom of a drilled hole.
Total proved reserves – The summation of proved developed reserves and proved undeveloped reserves.
Turnaround – A planned major maintenance program the costs for which are expensed in the period incurred and can include the costs of contractor repair services, materials and supplies, equipment rentals and our labor costs.
U.K. – United Kingdom.
U.S. – United States of America.

U.S. resource plays – Consists of our unconventional properties in the Oklahoma, Eagle Ford in Texas, the Bakken in North Dakota, STACK and SCOOP in Oklahoma and Northern Delaware.Delaware in New Mexico.
U.S. GAAP – U.S. Generally Accepted Accounting principlesPrinciples.
Working interest – The interest in a mineral property, which gives the owner that share of production from the property. A working interest owner bears that share of the costs of exploration, development and production in return for a share of production. Working interests are sometimes burdened by overriding royalty interests or other interests.
WOTUS – Waters of the United States.
WTI – West Texas Intermediate crude oil, an oil index benchmark price as quoted by NYMEX.



Disclosures Regarding Forward-Looking Statements
This Annual Report on Form 10-K contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These are statements, other than statements of historical fact, that give current expectations or forecasts of future events, including without limitation: our operational, financial and growth strategies, including drilling plans and projects, planned wells, rig count, inventory, seismic, exploration plans, maintenance activities, drilling and completion improvements, cost reductions, non-core asset sales, and financial flexibility; our ability to successfully effect those strategies and the expected timing and results thereof; our 2018 capital development program2020 Capital Budget and the planned allocation thereof; planned capital expenditures and the impact thereof; expectations regarding future economic and market conditions and their effects on us; our financial and operational outlook, and ability to fulfill that outlook; our financial position, balance sheet, liquidity and capital resources, and the benefits thereof; resource and asset potential; reserve estimates; growth expectations; and future production and sales expectations, and the drivers thereof. In addition, many forward-looking statements may be identified by the use of forward-looking terminology such as “anticipates,” “believes,” “estimates,” “expects,” “targets,” “plans,” “projects,” “could,” “may,” “should,” “would” or similar words indicating that future outcomes are uncertain. While we believe that our assumptions concerning future events are reasonable, these expectations may not prove to be correct. A number of factors could cause results to differ materially from those indicated by such forward-looking statements including, but not limited to:
conditions in the oil and gas industry, including supply and demand levels for crude oil and condensate, NGLs and natural gas and the resulting impact on price;
changes in expected reserve or production levels;
changes in political or economic conditions in the jurisdictions in which we operate,E.G., including changes in foreign currency exchange rates, interest rates, inflation rates, and global and domestic market conditions;
risks relatingrelated to our hedging activities;
liability resulting from litigation;
capital available for exploration and development;
the inability of any party to satisfy closing conditions or delays in execution with respect to our asset acquisitions and dispositions;
drilling and operating risks;
lack of, or disruption in, access to pipelines or other transportation methods;
well production timing;
availability of drilling rigs, materials and labor, including the costs associated therewith;
difficulty in obtaining necessary approvals and permits;
non-performance by third parties of their contractual obligations;
unforeseen hazards such as weather conditions, acts of war or terrorist acts and the governmental or military response thereto;
cyber-attacks;
changes in safety, health, environmental, tax and other regulations;regulations, or requirements or initiatives including those addressing the impact of global climate change, air emissions or water management;
other geological, operating and economic considerations; and
other factors discussed in Item 1. Business, Item 1A. Risk Factors, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations, Item 7A. Quantitative and Qualitative Disclosures About Market Risk, and elsewhere in this report.
All forward-looking statements included in this report are based on information available to us on the date of this report. Except as required by law, we assumeundertake no dutyobligation to revise or update any forward-looking statements whether as a result of new information, future events or otherwise. All subsequent written and oral forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by the cautionary statements contained throughout this report.







4



PART I
ItemItems 1. and 2. Business and Properties
General
Marathon Oil Corporation (NYSE: MRO) is an independent exploration and production company basedincorporated in Houston, Texas,2001, focused on U.S. unconventional resource plays withplays: the Eagle Ford in Texas, the Bakken in North Dakota, STACK and SCOOP in Oklahoma and Northern Delaware in New Mexico. We also have international operations in the United States, Europe and Africa.E.G. Our corporate headquarters is located at 5555 San Felipe Street, Houston, Texas 77056-2723 and our telephone number is (713) 629-6600. Each of our two reportable operating segments are organized and managed based uponby geographic location and managed according to the nature of the products and services offered. The two segments are:
United States E&P – explores for, produces and markets crude oil and condensate, NGLs and natural gas in the United States;
International E&P – explores for, produces and markets crude oil and condensate, NGLs and natural gas outside of the United States andas well as produces and markets products manufactured from natural gas, such as LNG and methanol, in E.G.
We were incorporated in 2001.
Our strategy is to deliver competitive and improving corporate level returns by focusing onour capital investment in the lowestlower cost, highesthigher margin U.S. resource plays while maintaining a peer-leadingstrong balance sheet.sheet, prioritizing sustainable cash flow generation over a wide range of commodity prices, and returning capital to shareholders. See Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations, for a more detailed discussion of our operating results, cash flows and liquidity.
We areOur portfolio is concentrated onin our core operations in ourthe U.S. unconventional resource plays and E.G. The map below shows the locations of our coreU.S. operations:
a201910kmapa01.jpg
* Our additional locations include the Gulf of Mexico, U.K., Libya, Gabon and the Kurdistan Region of Iraq.
Segment and Geographic Information
In the second quarter of 2017, we closed on the sale of our Canadian business which includes our Oil Sands Mining segment and exploration stage in-situ leases. The Canadian business is reflected as discontinued operations in all periods presented. Additionally, we have renamed our North America E&P segment to United States E&P segment, effective June 30, 2017. See Item 8. Financial Statements and Supplementary Data – Note 1 to the consolidated financial statements for further detail. For reportable operating segment and geographic financial information, see Item 8. Financial Statements and Supplementary Data – Note 6 to the consolidated financial statements.
In the following discussion regarding our United States E&P and International E&P segments, references to net wells, acres, sales or investment indicate our ownership interest or share, as the context requires.

United States E&P Segment
We are engaged in oil and gas exploration, development and production activities in the U.S. Our primary focus in the United States E&P segment is concentrated within our four high quality unconventionalhigh-quality resource plays. See Item 7. Management’sManagement's Discussion and Analysis of Financial Condition and Results of Operations for further detail on current year results.
United States E&P-- Unconventional– U.S. Resource Plays
Eagle Ford – We have been operating in the South Texas Eagle Ford play since 2011, where roughly two thirds of our acreage is located in the high-return Karnes, CountyAtascosa, Gonzales and Atascosa County. WeLavaca Counties. Our focus is capital efficient development with a goal of maximizing returns and cash flow generation while extending our core acreage. During 2019, we acquired 18,000 net acres adjacent to our existing acreage in the Eagle Ford, which included production of approximately 7,000 net boed and associated midstream infrastructure. Additionally, we operate 32 central gathering and treating facilities across the fieldplay that support more than 1,5001,600 producing wells. We alsowells as well as own and operate the Sugarloaf gathering system, a 42-mile natural gas pipeline through the heart of our acreage in Karnes and Atascosa and Bee Counties.
Bakken – We have been operating in North Dakota and eastern Montanathe Williston Basin since 2006. The majority of our core acreage is in core prospects within McKenzie, Mountrail, and Dunn Counties in North Dakota.Dakota targeting the Middle Bakken and Three Forks reservoirs. We continue focusing on theour investment in our high-return Myrmidon area building onand Hector areas, while also delineating and extending our core acreage across the successes fromrest of our enhanced completion designs, as well as delineatingposition.
Oklahoma– With a history in Oklahoma that dates back more than 100 years, our position in Hector.
Oklahoma – Our primary focus in Oklahoma has recently been delineation and leasehold protection in the Meramec playearly infill development in the STACK Meramec and SCOOP Woodford, while progressing delineation of the Woodford and Springerother plays in the SCOOP, as we move toward infill development.across our footprint. We primarily hold net acreage with rights to the Woodford, Springer, Meramec, Osage Oswego, Granite Wash and other Pennsylvanian and Mississippian plays,prospect intervals, with a majority of this in the SCOOP and STACK.STACK, with our recent activity in these plays being directed towards the more advantaged overpressured oil areas.
Northern Delaware – We closedhave been operating in the Northern Delaware basin, which is located within the greater Permian area, since closing on multiple Permiantwo major acquisitions during 2017, with ain 2017. Our focus has been to strategically advance our position and prepare for future development by further coring up our footprint, progressing early delineation of our acreage, improving our cost structure and securing midstream solutions. We have the majority of theour acreage in Northern Delaware. These acquisitions give us a strong foundational footprintEddy and Lea counties primarily in the region where we have begun developing the Wolfcamp and Bone Spring New Mexico plays. See Item 8. Financial Statements and Supplementary Data
United StatesNote 5 to the consolidated financial statements for further detail.
Other United StatesResource Exploration
Our remainingresource exploration properties in the United States primarily consist of outside operated assetsinclude our acquired acreage in the Gulf of Mexico, includingemerging Louisiana Austin Chalk play, with an acreage position focused in the Gunflint field whereWestern Fairway. Our first exploration well is on flowback and well clean-up and we hold an 18% non-operated working interest.have recently spud on our second exploration well. We also closed on approximately 40,000 net acres in the Texas Delaware oil play in West Texas for $106 million in 2019.
International E&P Segment
We are engaged in oil and gas development and production across our international locations primarilyactivities in E.G., U.K. and Libya. We include the results of our investments in the LPG processing plant, gas liquefaction operations and methanol production operations in E.G. in our International E&P segment.
International E&P
Equatorial Guinea – We own a 63% operated working interest under a production sharing contract in the Alba field and an 80% operated working interest in Block D, both of which are offshore E.G. Block D was unitized with the Alba field in second quarter 2017. Operational availability from our company-operated facilities averaged approximately 99%97% in 2017.2019.
Equatorial GuineaGas Processing We own a 52% interest in Alba Plant LLC, accounted for as an equity method investment, which operates an onshore LPG processing plant located on Bioko Island. Alba field natural gas under a long-term contract at a fixed price per btu, is processed by the LPG plant.plant under a fixed-price long term contract. The LPG plant extracts secondary condensate and LPG from the natural gas stream and uses some of the remaining dry natural gas in its operations.

We also own 60% of EGHoldings and 45% of AMPCO, both accounted for as equity method investments. EGHoldings operates a 3.7 mmta LNG production facility and AMPCO operates a methanol plant, both located on Bioko Island. These facilities allow us to further monetize natural gas production from the Alba field. The LNG production facility sells LNG under a 3.4 mmta sales and purchase agreement. Under the current agreement, which runs through 2023, the purchaser takes delivery of the LNG on Bioko Island, with pricing linked principally to the Henry Hub index. Gross sales of LNG from this production facility totaled approximately 3.953 mmta in 2017.2019. AMPCO had gross sales totaling approximately 1,100878 mt in 2017.2019. Methanol production is sold to customers in Europe and the U.S.
United Kingdom – Our operated assetDuring 2019, we executed agreements for third-party gas through existing E.G. infrastructure, the initial step in the U.K. sector of the North Sea is the Brae area complex where we have a 42% working interest in the South, Central, North and West Brae fields, a 39% working interest in the East Brae field, and a 28% working interest in the nearby Braemar field. We own non-operated working interests in the Foinaven area complex, consisting of a 28% working interest in the main Foinaven field, a 47% working interest in East Foinaven and a 20% working interest in the T35 and T25 fields.


Libya – We hold a 16% non-operated working interest in the Waha concessions, which includes acreage located in the Sirte Basin of eastern Libya. While civil and political unrest has interrupted operations in recent years, our production resumed in October 2016 at our Waha concession. During December 2016, liftings resumedcreating an E.G. gas hub. Natural gas from the Es Sider crude oil terminal. During 2017Alen field will be processed through the existing Alba Plant LLC LPG processing plant and the EGHoldings LNG production facility. First gas sales volumesare expected in early 2021.
United Kingdom In the third quarter of 2019, we closed on the sale of our U.K. business, which represents a complete country exit. See Item 8. Financial Statements and production continued, exceptSupplementary Data – Note 5 to the consolidated financial statements for a brief interruption in March 2017 due to civil unrest.further detail.
Other International
Kurdistan Region of IraqWe haveIn the second quarter of 2019, we closed on the sale of our 15% non-operated interests in two blocks located north-northwest of Erbil: Atrush with a 15% working interest and Sarsang with a 20% working interest. In 2016, we relinquished to the Kurdistan Regional Government our 45% operated working interest in the HarirAtrush block located northeast of Erbil. 
Gabon – We holdin Kurdistan which represents a 100% participating interest and operatorship in the Tchicuate block where we have an exploration and production sharing agreement.
In the third quarter 2017, we entered into separate agreements to sell certain non-core properties in our International E&P segment, and a portion of this transaction closed during the 4th quarter 2017.complete country exit. See Item 8. Financial Statements and Supplementary Data - Note 5 to the consolidated financial statements for information about these dispositions.further detail.
Reserves
Proved reserves are required to be disclosed by continent and by country if the proved reserves related to any geographic area, on an oil equivalent barrel basis, represent 15% or more of our total proved reserves. A geographic area can be an individual country, group of countries within a continent or a continent. Other International ("Other Int’l"), includes the U.K.For additional detail on reserves, see Item 8. Financial Statements and the Kurdistan Region of Iraq. Approximately 72% of our proved reserves are located in OECD countries, with 70% located within the U.S.Supplementary Data - Supplementary Information on Oil and Gas Producing Activities.
The following tables set forth estimated quantities of our total proved crude oil and condensate, NGLs and natural gas reserves based upon SEC pricing for period ended December 31, 2017.2019.
   Africa    
December 31, 2017  U.S.  E.G.   Libya Total     Other Int'l Total from Cont Ops
Proved Developed Reserves           
Crude oil and condensate (mmbbl)
263
 39
 165
 204
 17
 484
Natural gas liquids (mmbbl)
118
 25
 
 25
 
 143
Natural gas (bcf)
726
 833
 94
 927
 2
 1,655
Total proved developed reserves  (mmboe)
502
 203
 181
 384
 17
 903
Proved Undeveloped Reserves      

   

Crude oil and condensate (mmbbl)
307
 
 
 
 9
 316
Natural gas liquids (mmbbl)
111
 
 
 
 
 111
Natural gas (bcf)
598
 
 110
 110
 6
 714
Total proved undeveloped reserves  (mmboe)
518
 
 18
 18
 10
 546
Total Proved Reserves      

   

Crude oil and condensate (mmbbl)
570
 39
 165
 204
 26
 800
Natural gas liquids (mmbbl)
229
 25
 
 25
 
 254
Natural gas (bcf)
1,324
 833
 204
 1,037
 8
 2,369
Total proved reserves (mmboe)
1,020
 203
 199
 402
 27
 1,449
 
Crude Oil and Condensate
(mmbbl)
 
Natural Gas Liquids
(mmbbl)
 
Natural Gas
(bcf)
 
Total
(mmboe)
 Total (%)
Proved Developed Reserves         
U.S.304
 122
 825
 563
 47%
E.G.30
 19
 649
 158
 13%
Total proved developed reserves (mmboe)
334
 141
 1,474
 721
 60%
Proved Undeveloped Reserves         
U.S.315
 82
 453
 473
 39%
E.G.3
 2
 41
 11
 1%
Total proved undeveloped reserves (mmboe)
318
 84
 494
 484
 40%
Total Proved Reserves         
U.S.619
 204
 1,278
 1,036
 86%
E.G.33
 21
 690
 169
 14%
Total proved reserves (mmboe)
652
 225
 1,968
 1,205
 100%
Total proved reserves (%)54% 19% 27% 100%  
Of the total estimated proved reserves, approximately 55% was crude oil and condensate. As of December 31, 2017, our estimated proved developed reserves totaled 903 mmboe or 62% and estimated proved undeveloped reserves totaling 546 mmboe or 38% of our total proved reserves. For additional detail on reserves, see Item 8. Financial Statements and Supplementary Data - Supplementary Information on Oil and gas Producing Activities.

Productive and Drilling Wells
For our United States E&P and International E&P segments, the following table sets forth gross and net productive wells, service wells and drilling wells as of December 31 for the years presented.
Productive Wells       ��Productive Wells        
Oil Natural Gas Service Wells   Drilling WellsOil Natural Gas Service Wells Drilling Wells
Gross Net Gross Net Gross Net Gross NetGross Net Gross Net Gross Net Gross Net
2019               
U.S.4,984
 2,195
 1,550
 615
 204
 20
 30
 15
E.G.
 
 19
 12
 
 
 
 
Total (a)
4,984
 2,195
 1,569
 627
 204
 20
 30
 15
2018
              
U.S. (b)
4,630
 2,056
 1,703
 655
 209
 21
    
E.G.
 
 19
 12
 
 
    
Other International62
 22
 11
 4
 24
 8
    
Total (c)
4,692
 2,078
 1,733
 671
 233
 29
    
2017                              
U.S.5,132
 1,905
 1,690
 676
 799
 70
 33
 13
5,132
 1,905
 1,690
 676
 799
 70
    
E.G.
 
 19
 12
 
 
 
 

 
 19
 12
 
 
    
Libya1,071
 175
 7
 2
 94
 16
 
 
1,071
 175
 7
 2
 94
 16
    
Total Africa1,071
 175
 26
 14
 94
 16
 
 
1,071
 175
 26
 14
 94
 16
    
Other International61
 22
 19
 7
 23
 8
 
 
61
 22
 19
 7
 23
 8
    
Total6,264
 2,102
 1,735
 697
 916
 94
 33
 13
6,264
 2,102
 1,735
 697
 916
 94
    
2016
              
U.S. (a)
4,533
 1,650
 1,830
 708
 821
 85
    
E.G.
 
 17
 11
 2
 1
    
Libya1,071
 175
 7
 1
 94
 16
    
Total Africa1,071
 175
 24
 12
 96
 17
    
Other International62
 23
 35
 14
 23
 8
    
Total5,666
 1,848
 1,889
 734
 940
 110
    
2015               
U.S.7,198
 2,878
 1,796
 750
 2,727
 747
    
E.G.
 
 17
 11
 2
 1
    
Libya1,071
 175
 7
 1
 94
 16
    
Total Africa1,071
 175
 24
 12
 96
 17
    
Other International59
 21
 39
 16
 24
 8
    
Total8,328
 3,074
 1,859
 778
 2,847
 772
    
(a) 
Reduction in December 31, 2016 gross and net productive wells and service wells is primarily
Other International was removed from 2019 due to the dispositionssale of certain conventional West Texasour U.K. business and Wyoming assetsour 15% non-operated interest in 2016.the Atrush block in Kurdistan. See Item 8. Financial Statements and Supplementary Data - Note 5 to the consolidated financial statements for further information.
(b)
The 2018 decrease in gross productive oil wells and gross service wells is a result of the sale of non-core, non-operated conventional properties in the United States segment during the third quarter of 2018. See Item 8. Financial Statements and Supplementary Data - Note 5 to the consolidated financial statements for information about these dispositions.



(c)
Libya was removed from 2018 due to the sale of our subsidiary in Libya. See Item 8. Financial Statements and Supplementary Data - Note 5 to the consolidated financial statements for further information.

Drilling Activity
For our United States E&P and International E&P segments, the table below sets forth, by geographic area, the number of net productive and dry development and exploratory wells completed as of December 31 for the years represented.
Development Exploratory  Development Exploratory  
Oil 
Natural
Gas
 Dry Total Oil 
Natural
Gas
 Dry Total TotalOil 
Natural
Gas
 Dry Total Oil 
Natural
Gas
 Dry Total Total
20192019            
U.S.197
 28
 
 225
 57
 26
 2
 85
 310
E.G.
 
 
 
 
 
 
 
 
Total (a)
197
 28
 
 225
 57
 26
 2
 85
 310
20182018            
U.S.171
 25
 
 196
 66
 36
 2
 104
 300
E.G.
 
 
 
 
 
 1
 1
 1
Other International
 
 
 
 
 
 
 
 
Total (b)
171
 25
 
 196
 66
 36
 3
 105
 301
20172017            2017            
U.S.107
 27
 
 134
 88
 16
 
 104
 238
107
 27
 
 134
 88
 16
 
 104
 238
E.G.
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
Libya
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
Total Africa
 
 

 
 
 
 
 
 

 
 
 
 
 
 
 
 
Other International
 
 
 
 
 
 
 
 

 
 
 
 
 
 2
 2
 2
Total107
 27
 
 134
 88
 16
 
 104
 238
107
 27
 
 134
 88
 16
 2
 106
 240
2016            
U.S.64
 12
 
 76
 70
 27
 
 97
 173
E.G.
 
 
 
 
 
 
 
 
Libya
 
 
 
 
 
 
 
 
Total Africa
 
 
 
 
 
 
 
 
Other International
 
 
 
 
 
 
 
 
Total64
 12
 
 76
 70
 27
 
 97
 173
2015            
U.S.135
 36
 11
 182
 49
 48
 1
 98
 280
E.G.
 1
 
 1
 
 
 1
 1
 2
Libya
 
 
 
 
 
 
 
 
Total Africa
 1
 
 1
 
 
 1
 1
 2
Other International1
 
 
 1
 
 
 
 
 1
Total136
 37
 11
 184
 49
 48
 2
 99
 283
(a)
Other International was removed from 2019 due to the sale of our U.K. business and our 15% non-operated interest in the Atrush block in Kurdistan. See Item 8. Financial Statements and Supplementary Data - Note 5 to the consolidated financial statements for further information.
(b)
Libya was removed from 2018 due to the sale of our subsidiary in Libya. See Item 8. Financial Statements and Supplementary Data - Note 5 to the consolidated financial statements for further information.
Acreage
We believe we have satisfactory title to our United States E&P and International E&P properties in accordance with standards generally accepted in the industry; nevertheless, we can be involved in title disputes from time to time which may result in litigation. In the case of undeveloped properties, an investigation of record title is made at the time of acquisition. Drilling title opinions are usually prepared before commencement of drilling operations. Our title to properties may be subject to burdens such as royalty, overriding royalty, carried, net profits, working and other similar interests and contractual arrangements customary in the industry. In addition, our interests may be subject to obligations or duties under applicable laws or burdens such as net profits interests, liens related to operating agreements, development obligations or capital commitments under international production sharing contracts or exploration licenses.
The following table sets forth, by geographic area, the gross and net developed and undeveloped acreage held in our United States E&P and International E&P segments as of December 31, 2017.2019.
Developed Undeveloped 
Developed and
Undeveloped
Developed Undeveloped 
Developed and
Undeveloped
(In thousands)Gross     Net Gross     Net Gross     NetGross Net Gross Net Gross Net
U.S.1,529
 1,008
 388
 322
 1,917
 1,330
1,388
 993
 391
 306
 1,779
 1,299
E.G.82
 67
 54
 36
 136
 103
82
 67
 
 
 82
 67
Libya12,909
 2,108
 
 
 12,909
 2,108
Other Africa
 
 277
 277
 277
 277
Total Africa12,991
 2,175
 331
 313
 13,322
 2,488
Other International86
 31
 171
 32
 257
 63
Total14,606
 3,214
 890
 667
 15,496
 3,881
1,470
 1,060
 391
 306
 1,861
 1,366

In the ordinary course of business, based on our evaluations of certain geologic trends and prospective economics, we have allowed certain lease acreage to expire and may allow additional acreage to expire in the future. If production is not established or we take no other action to extend the terms of the leases, licenses or concessions, additional undeveloped acreage willlisted in the table below could expire in futureover the next three years. We plan to continue the terms of certain of these licenses and concession areas or retain leases through operational or administrative actions.

Net Sales Volumes There are no material quantities of net proved undeveloped reserves assigned to expiring undeveloped acreage in the next three years.
 
Africa 
      
    U.S.  E.G.   Libya Other Int'l Cont Ops Disc Ops 
Total
Year Ended December 31,             
2017            
Crude and condensate (mbbld)(a)
133
 21
 19
 12
 185
 
 185
Natural gas liquids (mbbld)
43
 11
 
 1
 55
 
 55
Natural gas (mmcfd)(b)
348
 459
 4
 22
 833
 
 833
Synthetic crude oil (mbbld)(c)

 
 
 
 
 18
 18
Total sales volumes (mboed)
234
 109
 20
 16
 379
 18
 397
2016       
   
Crude and condensate (mbbld)(a)
131
 20
 3
 12
 166
 
 166
Natural gas liquids (mbbld)
40
 11
 
 
 51
 
 51
Natural gas (mmcfd)(b)
314
 425
 
 28
 767
 
 767
Synthetic crude oil (mbbld)(c)

 
 
 
 
 48
 48
Total sales volumes (mboed)
223
 102
 3
 17
 345
 48
 393
2015       
   
Crude and condensate (mbbld)(a)
171
 19
 
 14
 204
 
 204
Natural gas liquids (mbbld)
39
 10
 
 
 49
 
 49
Natural gas (mmcfd)(b)
351
 410
 
 21
 782
 
 782
Synthetic crude oil (mbbld)(c)

 
 
 
 
 45
 45
Total sales volumes (mboed)
269
 97
 
 18
 384
 45
 429
 Net Undeveloped Acres Expiring
 Year Ended December 31,
(In thousands)2020 2021 2022
U.S.70
 108
 31
E.G.
 
 
Total70
 108
 31


Net Sales Volumesare presented on a continuing operations basis. At December 31, 2019, 2018 and 2017, the Eagle Ford, Bakken and Oklahoma fields in the United States contained 15% or more of our total proved reserves. Production for these fields along with our production from fields containing less than 15% of our total proved reserves are presented in the table below.
 December 31,
 2019 2018 2017
Net Sales Volumes     
Crude oil and condensate (mbbld) (a)
     
United States     
Eagle Ford63
 63
 59
Bakken86
 71
 46
Oklahoma21
 18
 15
Northern Delaware16
 12
 4
 Other U.S.4
 7
 9
Africa     
E.G.15
 17
 21
Libya
 7
 19
Other International (b)
5
 15
 12
Total210
 210
 185
Natural gas liquids (mbbld)     
United States     
Eagle Ford22
 23
 21
Bakken9
 7
 6
Oklahoma22
 20
 14
Northern Delaware6
 4
 1
 Other U.S.1
 1
 1
Africa     
E.G.9
 11
 11
Other International (b)

 
 1
Total69
 66
 55
Natural gas (mmcfd) (c)
     
United States     
Eagle Ford130
 129
 125
Bakken46
 35
 25
Oklahoma210
 213
 149
Northern Delaware36
 26
 9
 Other U.S.16
 26
 40
Africa     
E.G.365
 416
 459
Libya
 5
 4
Other International (b)
6
 14
 22
Total809
 864
 833
Total sales volumes (mboed)     
United States     
Eagle Ford106
 108
 101
Bakken103
 84
 56
Oklahoma78
 74
 54
Northern Delaware28
 20
 6
 Other U.S.8
 12
 17
Africa     
E.G.85
 97
 109
Libya
 8
 20
Other International (b)
6
 17
 16
Total414
 420
 379
(a) 
The amounts correspond with the basis for fiscal settlements with governments, representing equity tanker liftings and direct deliveries of liquid hydrocarbons.
(b) 
Other International sales include sales volumes for the U.K. and the Atrush block in Kurdistan, which were both sold in 2019 and sales volumes for the non-operated Sarsang block in Kurdistan which was sold in 2018. See Item 8. Financial Statements and Supplementary Data - Note 5 to the consolidated financial statements for further information.
(c)
Includes natural gas acquired for injection and subsequent resale.
(c)
Upgraded bitumen excluding blendstocks.




Average Sales Price and Production CostCosts per Unit(a) are presented on a continuing operations basis by geographic area.
   Africa        
(Dollars per boe)  U.S.  E.G.   Libya Other Int'l Cont Ops Disc Ops 

Total
2017$9.49
 $2.12
 $6.08
 $26.61
 $7.90
 $29.72
 $9.23
20169.84
 2.17
 N.M.
 23.13
 8.41
 29.36
 11.02
201510.65
 2.37
 N.M.
 27.23
 9.54
 38.42
 12.62
 December 31,
(Dollars per unit)2019 2018 2017
Average Sales Price per Unit (a)
     
Crude oil and condensate (bbl)     
United States$55.80
 $63.11
 $49.35
Africa     
E.G.48.99
 55.28
 46.02
Libya
 73.75
 60.72
Total Africa48.99
 60.65
 53.11
Other International (b)
64.71
 70.39
 52.66
Total$55.54
 $63.32
 $50.38
      
Natural gas liquids (bbl)     
United States$14.22
 $24.54
 $20.55
Africa     
E.G. (d)
1.00
 1.00
 1.00
Total Africa1.00
 1.00
 1.00
Other International (b)
37.88
 41.66
 39.65
Total$12.46
 $20.85
 $16.65
      
Natural gas (mcf)     
United States$2.18
 $2.65
 $2.84
Africa     
E.G. (c)
0.24
 0.24
 0.24
Libya
 4.57
 5.03
Total Africa0.24
 0.30
 0.28
Other International (b)
5.67
 8.03
 6.28
Total$1.33
 $1.58
 $1.51
      
Average Production Costs per Unit (d)
     
U.S.$9.08
 $9.83
 $9.49
E.G.2.34
 1.91
 2.12
Libya
 4.35
 6.08
Other International (b)
30.42
 30.02
 26.61
Total$8.03
 $8.68
 $7.90
(a) 
Production, severance and property taxes are excluded; however, shipping and handling as well as other operating expenses are included in the production costs used in this calculation. See Item 8. Financial Statements and Supplementary Data – Supplementary Information on Oil and Gas Producing Activities - Results of Operations for Oil and Gas Production Activities for more information regarding production costs.
N.M. Not meaningful information due to limited sales.

Average Sales Price per Unit(a)
 
 Africa 
    
(Dollars per unit)  U.S.  E.G.   Libya Total     Other Int'l Disc Ops 
Total
2017            
Crude and condensate (bbl)
$49.35
 $46.02
 $60.72
 $53.11
 $52.66
 $
 $50.38
Natural gas liquids (bbl)
20.55
 1.00
(b) 

 1.00
 39.65
 
 16.65
Natural gas (mcf)
2.84
 0.24
(b) 
5.03
 0.28
 6.28
 
 1.51
Synthetic crude oil (bbl)

 
 
 
 
 47.39
 47.39
2016            
Crude and condensate (bbl)
$38.57
 $38.85
 $57.69
 $40.95
 $43.21
 $
 $39.23
Natural gas liquids (bbl)
13.15
 1.00
(b) 

 1.00
 26.41
 
 10.68
Natural gas (mcf)
2.38
 0.24
(b) 

 0.24
 4.80
 
 1.26
Synthetic crude oil (bbl)

 
 
 
 
 37.57
 37.57
2015            
Crude and condensate (bbl)
$43.50
 $42.83
 $
 $42.83
 $53.91
 $
 $44.14
Natural gas liquids (bbl)
13.37
 1.00
(b) 

 1.00
 32.53
 
 11.16
Natural gas (mcf)
2.66
 0.24
(b) 

 0.24
 6.85
 
 1.50
Synthetic crude oil (bbl)

 
 
 
 
 40.13
 40.13
(a)
Excludes gains or losses on commodity derivative instruments.
(b) 
Other International sales include sales volumes for the U.K. and the Atrush block in Kurdistan, which were both sold in 2019 and sales volumes for the non-operated Sarsang block in Kurdistan which was sold in 2018. See Item 8. Financial Statements and Supplementary Data - Note 5 to the consolidated financial statements for further information.
(c)
Primarily represents fixed prices under long-term contracts with Alba Plant LLC, AMPCO and/or EGHoldings, which are equity method investees. We include our share of income from each of these equity method investees in our International E&P Segment.segment.
(d)
Production, severance and property taxes are excluded; however, shipping and handling as well as other operating expenses are included in the production costs used in this calculation. See Item 8. Financial Statements and Supplementary Data – Supplementary Information on Oil and Gas Producing Activities - Results of Operations for Oil and Gas Production Activities for more information regarding production costs.


Marketing
Our reportable operating segments include activities related to the marketing and transportation of substantially all of our crude oil and condensate, NGLs and natural gas. These activities include the transportation of production to market centers, the sale of commodities to third parties and the storage of production. We balance our various sales, storage and transportation positions in order to aggregate volumes to satisfy transportation commitments and to achieve flexibility within product types and delivery points. Such activities can include the purchase of commodities from third parties for resale.

Major Customers
We are exposed to credit risk in the event of nonpayment by counterparties, a significant portion of which are concentrated in energy-related industries. The creditworthiness of customers and other counterparties is subject to continuing review, including the use of master netting agreements, where appropriate. In 2019, sales to Marathon Petroleum Corporation, Flint Hills Resources, Valero Marketing and Supply, and Shell Trading and each of their respective affiliates, accounted for approximately 13%, 13%, 11% and 10% of our total revenues. In 2018, sales to Valero Marketing and Supply and Flint Hills Resources and their respective affiliates, each accounted for approximately 11% of our total revenues. In 2017, sales to Vitol and their respective affiliates accounted for approximately 10% of our total revenues.
Gross Delivery Commitments
We have committed to deliver gross quantities of crude oil and condensate, NGLs and natural gas to customers under a variety of contracts. As of December 31, 2017,2019, the contracts for fixed and determinable quantities were at variable, market-based pricing and related primarily to the following commitments:
 2018 2019 2020 Thereafter Commitment Period Through 2020 2021 2022 Thereafter Commitment Period Through
Eagle Ford                
Crude and condensate (mbbld)
 95
 65
 51
  2020 51
 
 
 
 2020
Natural gas liquids (mbbld)
 1
 1
 
  2020
Natural gas (mmcfd)
 168
 168
 168
 46 - 70 2022 120
 56
 36
 
 2022
Bakken                
Crude and condensate (mbbld)
 10
 10
 10
 5 - 10 2027 10
 10
 10
 5 - 10
 2027
Natural gas (mmcfd)
 2
 2
 2
 2 - 25 2027 3
 3
 3
 3 - 25
 2028
Oklahoma
       
Other United States         
Natural gas (mmcfd)

 
 90
 118
 110 - 148 2030 4
 4
 1
 
 2022
All of these contracts provide the optionsoption of delivering third-party volumes or paying a monetary shortfall penalty if production is inadequate.inadequate to satisfy our commitment. In addition to the contracts discussed above, we have entered into numerous agreements for transportation and processing of our equity production. Some of these contracts have volumetric requirements which could require monetary shortfall penalties if our production is inadequate to meet the terms.

Competition
Competition exists in all sectors of the oil and gas industry and we compete with major integrated and independent oil and gas companies, as well as national oil companies.companies, and to a lesser extent, companies that supply alternative sources of energy. We compete, in particular, in the exploration for and development of new reserves, acquisition of oil and natural gas leases and other properties, the marketing and delivery of our production into worldwide commodity markets and for the labor and equipment required for exploration and development of those properties. Principal methods of competing include geological, geophysical, and engineering research and technology, experience and expertise, economic analysis in connection with portfolio management, and safely operating oil and gas producing properties. See Item 1A. Risk Factors for discussion of specific areas in which we compete and related risks.
Environmental, Health and Safety Matters
The Health, Environmental, Safety and Corporate Responsibility Committee of our Board of Directors is responsible for overseeing our position on public issues, including environmental, health and safety matters. Our Corporate Health, Environment, Safety and Security organization has the responsibility to ensure that our operating organizations maintain environmental compliance systems that support and foster our compliance with applicable laws and regulations. Committees comprised of certain of our officers review our overall performance associated with various environmental compliance programs. We also have a Corporate Emergency Response Team which oversees our response to any major environmental or other emergency incident involving us or any of our properties.
Our businesses are subject to numerous laws and regulations relating to the protection of the environment, health and safety at the national, state and local levels. These laws and their implementing regulations and other similar state and local laws and rules can impose certain operational controls for minimization of pollution or recordkeeping, monitoring and reporting requirements or other operational or siting constraints on our business, result in costs to remediate releases of regulated substances, including crude oil and produced water, into the environment, or require costs to remediate sites to which we sent regulated substances for disposal. In some cases, these laws can impose strict liability for the entire cost of clean-up on any responsible party without regard to negligence or fault and impose liability on us for the conduct of others (such as prior owners

or operators of our assets) or conditions others have caused, or for our acts that complied with all applicable requirements when we performed them. We have incurred and will continue to incur capital, operating and maintenance, and remediation expenditures as a result of environmental laws and regulations.
New laws have been enacted or are otherwise being considered and regulations are being adopted by various regulatory agencies on a continuing basis and the costs of compliance with these new laws and regulations can only be broadly appraised until their implementation becomes more defined.
For a discussion of environmental capital expenditures and costs of compliance for air, water, solid waste and remediation, see Item 3. Legal Proceedings and Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Management’s Discussion and Analysis of Environmental Matters, Litigation and Contingencies.Contingencies.
Air and Climate Change
Environmental advocacy groups and regulatory agencies in the United States and other countries have focused considerable attention on the emissions of carbon dioxide, methane and other greenhouse gases and their potential role in climate change. Developments in greenhouse gas initiatives may affect us and other similarly situated companies operating in the oil and gas industry. As part of our commitment to environmental stewardship and as required by law, we estimate and publicly report greenhouse gas emissions from our operations. We are working to continuously improve the accuracy and completeness of these estimates. In addition, we continuously strive to improve operational and energy efficiencies through resource and energy conservation where practicable and cost effective.
Government entities and other groups have filed lawsuits in Californiaseveral states and New Yorkother jurisdictions seeking to hold a wide variety of companies that produce fossil fuels liable for the alleged impacts of the greenhouse gas emissions attributable to those fuels. The lawsuits allege damages as a result of global warming and the plaintiffs are seeking unspecified damages and abatement under various tort theories. Marathon Oil has been named as a defendant in sixseveral of these lawsuits, in California, along with numerous other companies. Similar lawsuits may be filed in other jurisdictions. While the ultimate outcome and impact to us cannot be predicted with certainty, we believe that the claims made against us are without merit and will not have a material adverse effect on our consolidated financial position, results of operations or cash flow.
The EPA finalized a more stringent National Ambient Air Quality Standard ("NAAQS")NAAQS for ozone in October 2015. This more stringent ozone NAAQS could resultStates that contain any areas designated as non-attainment, and any tribes that choose to do so, will be required to complete development of implementation plans in the 2020-2022 time frame. The EPA may in the future designate additional areas being designated as non-attainment, including areas in which we operate, whichoperate. The EPA is also in the process of reviewing the ozone NAAQS to determine whether to maintain the 2015 standard or to promulgate a more stringent standard. This review is expected to be complete by December 2020. The implementation of the 2015 standard, or the promulgation of a future more stringent standard, may result in an increase in costs for emission controls and requirements for additional monitoring and testing, as well as a more cumbersome permitting process. The EPA anticipates promulgating final area designations under the new standard in the first half of 2018. Although there may be an adverse financial impact (including compliance costs, potential permitting delays and increased regulatory requirements) associated with this revised regulation, the extent and magnitude of

that impact cannot be reliably or accurately estimated due to the present uncertainty regarding any additional measures and how they will be implemented. The EPA's final ruleUnited States Court of Appeals for the District of Columbia largely upheld EPA’s 2015 standard in August 2019. No party has been judicially challenged by both industry and other interested parties, and the outcomesought review of this litigation may also impact implementationdecision and, revisions to the rule.therefore, it is final.
In November 2016, the Bureau of Land Management (“BLM”)BLM issued a final rule to further restrict venting and/or flaring of gas from facilities subject to BLM jurisdiction, and to modify certain royalty requirements. BLM issued a two-year stay of these requirements in December 20172017. In September 2018, BLM published a final rule to rescind substantial portions of the rule. The rescission was challenged by multiple parties in the U.S. District Court for the Northern District of California. If the judicial challenges to the rule are successful and has indicated thatthe rule were to come back into effect, the requirements could be rescinded or significantly revised in the future. If not withdrawn or significantly revised, this rule is expected towould result in additional costs of compliance as well as increased monitoring, recordkeeping and recording for some of our facilities.  If we are unable to comply with the terms of these regulations, we could be required to forego certain operations. These regulations may also result in administrative, civil and/or criminal penalties for non-compliance.
Hydraulic Fracturing
Hydraulic fracturing is a commonly used process that involves injecting water, sand and small volumes of chemicals into the wellbore to fracture the hydrocarbon-bearing rock thousands of feet below the surface to facilitate higher flow of hydrocarbons into the wellbore. Our business uses this technique extensively throughout our operations. Hydraulic fracturing has been regulated at the state and local level through permitting and compliance requirements. Various state and local-level initiatives in regions with substantial shale resources have been or may be proposed or implemented to further regulate hydraulic fracturing practices, limit water withdrawals and water use, require disclosure of fracturing fluid constituents, restrict which additives may be used, or implement temporary or permanent bans on hydraulic fracturing. Although there may be an adverse financial impact (including compliance costs, potential permitting delays and increased regulatory requirements) associated with these initiatives, the extent and magnitude of that impact cannot be reliably or accurately estimated due to the present uncertainty regarding any additional measures and how they will be implemented.

Water
In 2014, the EPA and the U.S. Army Corps of Engineers published proposed regulations which expand the surface waters that are regulated under the Clean Water Act ("CWA")federal CWA and its various programs. While these regulations were finalized largely as proposed in 2015, the rule has beenwas stayed by the courts pending a substantive decision on the merits. In October 2019, EPA and the Army Corps of Engineers issued a final rule that repealed the 2015 regulations and reinstated the agencies’ narrower pre-2015 scope of federal CWA jurisdiction. In January 2020, EPA and the Army Corp of Engineers promulgated a new WOTUS definition that continues to provide a narrower scope of federal CWA jurisdiction than contemplated under the 2015 WOTUS definition, while also providing for greater predictability and consistency of federal CWA jurisdiction. Judicial challenges to EPA’s October 2019 final rule are currently before multiple federal district courts and challenges to EPA’s January 2020 final rule are anticipated. If thisthe October 2019 final rule is vacated and the 2015 rule is ultimately implemented, the expansion of CWA jurisdiction will result in additional costs of compliance as well as increased monitoring, recordkeeping and recording for some of our facilities.
For additional information, see Item 1A. Risk Factors.
Concentrations of Credit Risk
We are exposed to credit risk in the event of nonpayment by counterparties, a significant portion of which are concentrated in energy-related industries. The creditworthiness of customers and other counterparties is subject to continuing review, including the use of master netting agreements, where appropriate. In 2017, sales to Vitol and each of their respective affiliates accounted for approximately 10% of our total revenues. In 2016, sales to Valero Marketing and Supply, Tesoro Petroleum, and Flint Hills Resources and each of their respective affiliates accounted for approximately 13%, 11% and 10% of our total revenues. In 2015, sales to Shell Oil and its affiliates accounted for approximately 10% of our total revenues.Factors.
Trademarks, Patents and Licenses
We currently hold a number of U.S. and foreign patents. Although in the aggregate our trademarks patents and licensespatents are important to us, we do not regard any single trademark, patent, license or group of related trademarks patents or licensespatents as critical or essential to our business as a whole.
Employees
We had approximately 2,3002,000 active, full-time employees as of December 31, 2017.2019.

Information About our Executive Officers of the Registrant
The executive officers of Marathon Oil and their ages as of February 1, 2018,2020, are as follows:
Lee M. Tillman 5658 Chairman, President and Chief Executive Officer
Dane E. Whitehead 5658 Executive Vice President and Chief Financial Officer
T. Mitch Little 5456 Executive Vice President—Operations
Reginald D. Hedgebeth 5052 SeniorExecutive Vice President, General Counsel and SecretaryChief Administrative Officer
Patrick J. Wagner 5355 Executive Vice President-CorporatePresident—Corporate Development and Strategy
Catherine L. Krajicek56Vice President—Conventional
Gary E. Wilson 5658 Vice President, Controller and Chief Accounting Officer
Mr. Tillman was appointed by the board of directors as chairman of the board effective February 1, 2019. In August 2013, he was appointed as president and chief executive officer in August 2013.  Mr. Tillman is also a member of our Board of Directors.officer. Prior to this appointment, Mr. Tillman served as vice president of engineering for ExxonMobil Development Company (a project design and execution company), where he was responsible for all global engineering staff engaged in major project concept selection, front-end design and engineering.  Between 2007 and 2010, Mr. Tillman served as North Sea production manager and lead country manager for subsidiaries of ExxonMobil in Stavanger, Norway.  Mr. Tillman began his career in the oil and gas industry at Exxon Corporation in 1989 as a research engineer and has extensive operations management and leadership experience.
Mr. Whitehead was appointed executive vice president and chief financial officer in March 2017. Prior to this appointment, Mr. Whitehead served as executive vice president and chief financial officer of both EP Energy Corp. and EP Energy LLC (oil and natural gas producer) since May 2012. Between 2009 and 2012, Mr. Whitehead served as senior vice president of strategy and enterprise business development and a member of El Paso Corporation'sCorporation’s executive committee. He joined El Paso Exploration & Production Company as senior vice president and chief financial officer in 2006. Before joining El Paso, Mr. Whitehead was vice president, controller and chief accounting officer of Burlington Resources Inc. (oil and natural gas producer), and formerly senior vice president and CFO of Burlington Resources Canada.
Mr. Little was appointed executive vice president of operations in August 2016 after having served as vice president, conventional since December 2015, vice president international and offshore exploration and production operations since September 2013, and as vice president, international production operations since September 2012. Prior to that, Mr. Little was resident manager of our Norway operations and served as general manager, worldwide drilling and completions. Mr. Little joined Marathon Oil in 1986 and has since held a number of engineering and management positions of increasing responsibility.
Mr. Hedgebeth was appointed executive vice president, general counsel and chief administrative officer in August 2019 after having served as senior vice president, general counsel and secretary insince April 2017.2017. Between 2009 and 2017, Mr. Hedgebeth served as general counsel, corporate secretary and chief compliance officer for Spectra Energy Corp (oil and natural gas pipeline company) and general counsel for Spectra Energy Partners, LP. Before joining Spectra Energy, Mr. Hedgebeth

served as senior vice president, general counsel and secretary with Circuit City Stores, Inc. (consumer electronics retail company), and vice president of legal for The Home Depot, Inc. (home improvement supplies retailingretail company).
Mr. Wagner was appointed executive vice president of corporate development and strategy in November 2017 after having served as senior vice president of corporate development and strategy since March 2017, vice president of corporate development and interim chief financial officer since August 2016 and vice president of corporate development since April 2014. Prior to this appointment, he served as senior vice president, western business unit, for QR Energy LP (an oil and natural gas producer) and the affiliated Quantum Resources Management, which he joined in early 2012 as vice president, exploitation. Prior to that, Mr. Wagner was managing director in Houston for Scotia Waterous, the oil and gas arm of Scotiabank (an international banking services provider), from 2010 to 2012. Before joining Scotia, Mr. Wagner was vice president, Gulf of Mexico, for Devon Energy Corp. (an oil and natural gas producer), having joined Devon in 2003 as manager, international exploitation.
Ms. Krajicek was appointed vice president—conventional assets in August 2016 after having served as vice president of technology and innovation since December 2015. Prior to that, Ms. Krajicek served as vice president, health, environment, safety and security from January 2015 through December 2015. In January 2018 Ms. Krajicek announced her plans to retire effective April 1, 2018. Ms. Krajicek joined Marathon Oil in 2007 and has since held a number of positions of increasing responsibility. Prior to joining the Company, Ms. Krajicek spent 22 years with Conoco and then ConocoPhillips (a multinational energy corporation), where she held a variety of reservoir engineering and asset management and development management positions for upstream and mid-stream businesses under development, both in the U.S. and internationally.
Mr. Wilson was appointed vice president, controller and chief accounting officer in October 2014. Prior to joining Marathon Oil, he served in various finance and accounting positions of increasing responsibility at Noble Energy, Inc. (a global exploration and production company) since 2001, including as director corporate accounting from February 2014 through September 2014, director global operations services finance from October 2012 through February 2014, director controls and

reporting from April 2011 through September 2012, and international finance manager from September 2009 through March 2011.
Available Information
Our website is www.marathonoil.com. Our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, and Current Reports on Form 8-K and other reports and filings with the SEC are available free of charge on our website as soon as reasonably practicable after the reports are filed or furnished with the SEC. Information contained on our website is not incorporated into this Annual Report on Form 10-K or our other securities filings. Our filings are also available in hard copy, free of charge, by contacting ourus at 5555 San Felipe Street, Houston, Texas, 77056-2723, Attention: Investor Relations office.
The public may read and copy any materials we file withOffice, telephone: (713) 629-6600. Additionally, the SEC at its Public Reference Room at 100 F Street, NE, Washington, DC 20549. Information on the operation of the Public Reference Room may be obtained by calling the SEC at 1-800-SEC-0330. The SEC also maintains a website (www.sec.gov) that contains reports, proxy and information statements and other information regarding issuers that file electronically with the SEC.
Additionally, we make available free of charge on our website:
our Code of Business Conduct and Code of Ethics for Senior Financial Officers;
our Corporate Governance Principles; and
the charters of our Audit and Finance Committee, Compensation Committee, Corporate Governance and Nominating Committee and Health, Environmental, Safety and Corporate Responsibility Committee.

16




Item 1A. Risk Factors
We are subject to various risks and uncertainties in the course of our business. The following summarizes significant risks and uncertainties that may adversely affect our business, financial condition or results of operations. When considering an investment in our securities, you should carefully consider the risk factors included below as well as those matters referenced in the foregoing pages under "Disclosures“Disclosures Regarding Forward-Looking Statements"Statements” and other information included and incorporated by reference into this Annual Report on Form 10-K.
A substantial decline in crude oil and condensate, NGLs and natural gas prices would reduce our operating results and cash flows and could adversely impact our future rate of growth and the carrying value of our assets.
The markets for crude oil and condensate, NGLs and natural gas have been volatile and are likely to continue to be volatile in the future, causing prices to fluctuate widely. Our revenues, operating results and future rate of growth are highly dependent on the prices we receive for our crude oil and condensate, NGLs and natural gas. Many of the factors influencing prices of crude oil and condensate, NGLs and natural gas are beyond our control. These factors include:
worldwide and domestic supplies of and demand for crude oil and condensate, NGLs and natural gas;
the cost of exploring for, developing and producing crude oil and condensate, NGLs and natural gas;
the ability of the members of OPEC and certain non-OPEC members, such as Russia, to agree to and maintain production controls;
the production levels of non-OPEC countries, including production levels in the shale plays in the United States;
the level of drilling, completion and production activities by other exploration and production companies, and variability therein, in response to market conditions;
political instability or armed conflict in oil and natural gas producing regions;
changes in weather patterns and climate;
natural disasters such as hurricanes and tornadoes;
the price and availability of alternative and competing forms of energy;energy, such as nuclear, hydroelectric, wind or solar;
the effect of conservation efforts;
epidemics or pandemics;
technological advances affecting energy consumption and energy supply;
domestic and foreign governmental regulations and taxes;taxes, including further legislation requiring, subsidizing or providing tax benefits for the use of alternative energy sources and fuels; and
general economic conditions worldwide.
The long-term effects of these and other factors on the prices of crude oil and condensate, NGLs and natural gas are uncertain. Historical declines in commodity prices have adversely affected our business by:
reducing the amount of crude oil and condensate, NGLs and natural gas that we can produce economically;
reducing our revenues, operating income and cash flows;
causing us to reduce our capital expenditures, and delay or postpone some of our capital projects;
requiring us to impair the carrying value of our assets;
reducing the standardized measure of discounted future net cash flows relating to crude oil and condensate, NGLs and natural gas; and
increasing the costs of obtaining capital, such as equity and short- and long-term debt.

Estimates of crude oil and condensate, NGLs and natural gas reserves depend on many factors and assumptions, including various assumptions that are based on conditions in existence as of the dates of the estimates. Any material changes in those conditions or other factors affecting those assumptions could impair the quantity and value of our reserves.
The proved reserve information included in this Annual Report on Form 10-K has been derived from engineering and geoscience estimates. Estimates of crude oil and condensate, NGLs and natural gas and our historical synthetic crude oil reserves were prepared, in accordance with SEC regulations, by our in-house teams of reservoir engineers and geoscience professionals and were reviewed and approved by our Corporate Reserves Group and third-party consultants. Prior to 2016, the synthetic

crude oil reserves estimates, included in discontinued operations, were prepared by GLJ, a third-party consulting firm experienced in working with oil sands. Reserves were valued based on SEC pricing for the periods ended December 31, 2017, 20162019, 2018 and 2015,2017, as well as other conditions in existence at those dates. The table below provides the 20172019 SEC pricing for certain benchmark prices:
SEC Pricing 20172019 SEC Pricing
WTI Crude oil (per bbl)$51.34
$55.69
Henry Hub natural gas (per mmbtu)$2.98
$2.58
Brent crude oil (per bbl)$54.39
$63.15
Mont Belvieu NGLs (per bbl)$22.03
$18.41
If commoditycrude oil prices were to decrease by approximately 10%in the future average below average prices used to estimate 2017determine proved reserves (see table above), we would not expect price related reserve revisions toat December 31, 2019, it could have a material impactan adverse effect on our estimates of proved reserve volumes.volumes and the value of our business. Future reserve revisions could also result from changes in capital funding, drilling plans and governmental regulation, among other things.
Reserve estimation is a subjective process that involves estimating volumes to be recovered from underground accumulations of crude oil and condensate, NGLs and natural gas that cannot be directly measured. Estimates of economically producible reserves and of future net cash flows depend on a number of variable factors and assumptions, including:
location, size and shape of the accumulation as well as fluid, rock and producing characteristics of the accumulation;
historical production from the area, compared with production from other analogous producing areas;
the assumed impacts of regulation by governmental agencies;
assumptions concerning future operating costs, taxes, development costs and workover and repair costs; and
industry economic conditions, levels of cash flows from operations and other operating considerations.
As a result, different petroleum engineers and geoscientists, each using industry-accepted geologic and engineering practices and scientific methods, may produce different estimates of proved reserves and future net cash flows based on the same available data. Because of the subjective nature of such reserve estimates, each of the following items may differ materially from the estimated amounts:
the amount and timing of production;
the revenues and costs associated with that production; and
the amount and timing of future development expenditures.
If we are unsuccessful in acquiring or finding additional reserves, our future crude oil and condensate, NGLs and natural gas production would decline, thereby reducing our cash flows and results of operations and impairing our financial condition.
The rate of production from crude oil and condensate, NGLs and natural gas properties generally declines as reserves are depleted. Except to the extent we acquire interests in additional properties containing proved reserves, conduct successful exploration and development activities or, through engineering studies, optimize production performance or identify additional reservoirs not currently producing or secondary recovery reserves, our proved reserves willmay decline materially as crude oil and condensate, NGLs and natural gas are produced. Accordingly, to the extent we are not successful in replacing the crude oil and condensate, NGLs and natural gas we produce, our future revenues willmay decline. Creating and maintaining an inventory of prospects for future production depends on many factors, including:
obtaining rights to explore for, develop and produce crude oil and condensate, NGLs and natural gas in promising areas;
drilling success;
the ability to complete projects timely and cost effectively;
the ability to find or acquire additional proved reserves at acceptable costs; and

the ability to fund such activity.

Future exploration and drilling results are uncertain and involve substantial costs.
Drilling for crude oil and condensate, NGLs and natural gas involves numerous risks, including the risk that we may not encounter commercially productive reservoirs. The costs of drilling, completing and operating wells are often uncertain, and drilling operations may be curtailed, delayed or canceled as a result of a variety of factors, including:
unexpected drilling conditions;
title problems;
pressure or irregularities in formations;
equipment failures or accidents;
inflation in exploration and drilling costs;
fires, explosions, blowouts or surface cratering;
lack of, or disruption in, access to pipelines or other transportation methods; and
shortages or delays in the availability of services or delivery of equipment.
If crude oil and condensate, NGLs and natural gas prices decrease, it could adversely affect the abilities of our counterparties to perform their obligations to us including abandonment obligations, which could negatively impact our financial results.
We often enter into arrangements to conduct certain business operations, such as oil and gas exploration and production, or transportation of crude oil and condensate, NGLs and natural gas, with partners, co-working interest owners, and other counterparties in order to share risks associated with those operations. In addition, we market our products to a variety of purchasers. If commodity prices decrease, some of our counterparties may experience liquidity problems and may not be able to meet their financial and other obligations including abandonment obligations, to us. The inability of our joint venture partners or co-working interest owners to fund their portion of the costs under our joint venture agreements and joint operating agreements, or the nonperformance by purchasers, contractors or other counterparties of their obligations to us, could negatively impact our operating results and cash flows.
If we are unable to complete capital projects at their expected costs and in a timely manner, or if the market conditions assumed in our project economics deteriorate, our business, financial condition, results of operations and cash flows could be materially and adversely affected.
Delays or cost increases related to capital spending programs involving drilling and completion activities, engineering, procurement and construction of facilities (including improvements and repairs to our existing facilities) could adversely affect our ability to achieve forecasted internal rates of return and operating results. Delays in making required changes or upgrades to our facilities could subject us to fines or penalties as well as affect our ability to supply certain products we produce. Such delays or cost increases may arise as a result of unpredictable factors, many of which are beyond our control, including:
denial of or delay in receiving requisite regulatory approvals and/or permits;
unplanned increases in the cost of construction materials or labor;
disruptions in transportation of components or construction materials;
increased costs or operational delays resulting from shortages of water;
adverse weather conditions, natural disasters or other events (such as equipment malfunctions, explosions, fires or spills) affecting our facilities, or those of vendors or suppliers;
shortages of sufficiently skilled labor, or labor disagreements resulting in unplanned work stoppages;
market-related increases in a project’s debt or equity financing costs; and
nonperformance by, or disputes with, vendors, suppliers, contractors or subcontractors.
Any one or more of these factors could have a significant impact on our capital projects.
Our offshore operations involve special risks that could negatively impact us.
Offshore operations present technological challenges and operating risks because of the marine environment.  Activities in deepwater areas may pose incrementally greater risks because of water depths that limit intervention capability and the physical distance to oilfield service infrastructure and service providers.  Environmental remediation and other costs resulting from spills or releases may result in substantial liabilities.

We may incur substantial capital expenditures and operating costs as a result of compliance with and changes in environmental, health, safety and security laws andlaw, regulations or requirements or initiatives, including those addressing the impact of global climate change, air emissions or water management, and, as a result, our business, financial condition, results of operations and cash flows could be materially and adversely affected.
Our businesses are currently subject to numerous laws, regulations and other requirements relating to the protection of the environment, including those relating to the discharge of materials into the environment such as the venting or flaring of natural gas, waste management, pollution prevention, greenhouse gas emissions, including carbon dioxide and methane, and the protection of endangered species as well as laws, regulations, and other requirements relating to public and employee safety and health and to facility security. Additionally, states in which we operate may impose additional regulations, legislation, or requirements or begin initiatives addressing the impact of global climate change, air emissions or water management. We have incurred and may continue to incur capital, operating and maintenance, and remediation expenditures as a result of these laws, regulations, and other requirements.requirements or initiatives that are being considered or otherwise implemented. To the extent these expenditures, as with all costs, are not ultimately reflected in the prices of our products, our operating results willcould be adversely affected. The specific impact of these laws, regulations, and other requirements may vary depending on a number of factors, including the age and location of operating facilities and production processes. We may also be required to make material expenditures to modify operations, install pollution control equipment, perform site clean-ups or curtail operations that could materially and adversely affect our business, financial condition, results of operations and cash flows. We may become subject to liabilities that we currently do not anticipate in connection with new, amended or more stringent requirements, stricter interpretations of existing requirements or the future discovery of contamination. In addition, any failure by us to comply with existing or future laws, regulations, and other requirements could result in civil penalties or criminal fines and other enforcement actions against us.
We believe it is likely that the scientific and political attention to issues concerning the extent, causes of and responsibility for climate change will continue, with the potential for further regulations that could affect our operations. Our operations result in greenhouse gas emissions. Currently, various legislative or regulatory measures to address greenhouse gas emissions (including carbon dioxide, methane and nitrous oxides) are in various phases of review, discussion or implementation in countries where we operate, including the U.S. and the European Union. Internationally, the United Nations Framework Convention on Climate Change finalized an agreement among 195 nations at the 21st Conference of the Parties in Paris with an overarching goal of preventing global temperatures from rising more than 2 degrees Celsius. The agreement includes provisions that every country take some action to lower emissions, but there is no legal requirement for how or by what amount emissions should be lowered. The EPA has also finalized regulations targeting new sources of methane emissions from the oil and gas industry. Finalization of new legislation, regulations or international agreements in the future could result in increased costs to operate and maintain our facilities, capital expenditures to install new emission controls at our facilities, and costs to administer and manage any potential greenhouse gas emissions or carbon trading or tax programs. These costs and capital expenditures could be material. Although uncertain, these developments could increase our costs, reduce the demand for crude oil and condensate, NGLs and natural gas, and create delays in our obtaining air pollution permits for new or modified facilities.
The potential adoption of federal, state and local legislative and regulatory initiatives related to hydraulic fracturing could result in increased compliance costs, operating restrictions or delays in the completion of oil and gas wells. 
Hydraulic fracturing is a commonly used process that involves injecting water, sand, and small volumes of chemicals into the wellbore to fracture the hydrocarbon-bearing rock thousands of feet below the surface to facilitate higher flow of hydrocarbons into the wellbore. Our business uses this technique extensively throughout our U.S. operations. Hydraulic fracturing has been regulated at the state and local level through permitting and compliance requirements. Various state and local-level initiatives in regions with substantial shale resources have been or may be proposed or implemented to further regulate hydraulic fracturing practices, limit water withdrawals and water use, require disclosure of fracturing fluid constituents, restrict which additives may be used, or implement temporary or permanent bans on hydraulic fracturing. In 2015 the BLM issued a rule governing certain hydraulic fracturing practices on lands within their jurisdiction; however, this rule was rescinded in December 2017. This rescission is being judicially challenged before the U.S. District Court for the Northern District of California.
Increased regulation and attention given to the hydraulic fracturing process could lead to greater opposition, including litigation, to oil and gas activities using hydraulic fracturing techniques. Additional legislation or regulation could also lead to operational delays or increased operating costs in the production of crude oil and condensate, NGLs and natural gas, including from the shale plays, or could make it more difficult to perform hydraulic fracturing. The adoption of any federal, state or local laws or the implementation of regulations regarding hydraulic fracturing could potentially cause a decrease in the completion of new oil and gas wells and increased compliance costs which could increase costs of our operations and cause considerable delays in acquiring regulatory approvals to drill and complete wells.

The potential adoption of federal, state and local legislative and regulatory initiatives intended to address potential induced seismic activity in the areas in which we operate could result in increased compliance costs, operating restrictions or delays in the completion of oil and gas wells. 


State and federal regulatory agencies recently have focused on a possible connection between the operation of injection wells used for oil and gas waste disposal and seismic activity.  When caused by human activity, such events are called induced seismicity. Separate and apart from the referenced potential connection between injection wells and seismicity, concerns have been raised that hydraulic fracturing activities may be correlated to anomalous seismic events. Marathon uses hydraulic fracturing techniques throughout its U.S. operations.


While the scientific community and regulatory agencies at all levels are continuing to study the possible linkage between oil and gas activity and induced seismicity, some state regulatory agencies have modified their regulations or guidance to mitigate potential causes of induced seismicity. For example, Oklahoma has taken numerous regulatory actions in response to concerns related to the operation of produced water disposal wells and induced seismicity, and has issued guidelines to operators in certain areas of the State curtailing injection of produced water due to seismic concerns. Marathon does not currently own or operate injection wells or contract for such services in these areas. Further, Oklahoma recently issued guidelines to operators for management of anomalous seismicity that may be related to hydraulic fracturing activities in the SCOOP/STACK area. In addition, a number of lawsuits have been filed in Oklahoma alleging damage from seismicity relating to disposal well operations. Marathon has not been named in any of those lawsuits.


Increased seismicity in Oklahoma or other areas could result in additional regulation and restrictions on our operations and could lead to operational delays or increased operating costs.  Additional regulation and attention given to induced seismicity could also lead to greater opposition, including litigation, to oil and gas activities.
Worldwide political and economic developments and changes in law or policy could adversely affect our
Our offshore operations and materially reduce our profitability and cash flows.
Local political and economic factors in global markets could have a material adverse effect on us. A total of 38% of our crude oil and condensate, NGLs and natural gas related to continuing operations in 2017 was derived from production outside the U.S. and 30% of our proved reserves of crude oil and condensate, NGLs and natural gas as of December 31, 2017 were located outside the U.S. We are, therefore, subject to the political, geographic and economicinvolve special risks and possible terrorist activities or other armed conflict attendant to doing business within or outside of the U.S. There are many risks associated with operations in countries such as E.G., Gabon, the Kurdistan Region of Iraq and Libya, and in global markets including:
changes in governmental policies relating to crude oil and condensate, NGLs or natural gas and taxation;
other political, economic or diplomatic developments and international monetary fluctuations;
political and economic instability, war, acts of terrorism, armed conflict and civil disturbances;
the possibility that a government may seize our property with or without compensation, may attempt to renegotiate or revoke existing contractual arrangements or may impose additional taxes or royalty burdens; and
fluctuating currency values, hard currency shortages and currency controls.
For the past several years, there have been varying degrees of political instability and public protests, including demonstrations which have been marked by violence and numerous incidences of terrorist acts, within some countries in the Middle East and Africa. Some political regimes in these countries are threatened or have changed as a result of such unrest.
If such unrest continues to spread, conflicts could result in civil wars, regional conflicts, and regime changes resulting in governments that are hostile to the U.S. These may have the following results, among others:
volatility in global crude oil prices which could negatively impact the global economy, resulting in slower economic growth ratesus.
Offshore operations present technological challenges and reduced demand for our products;
negative impact on the world crude oil supply if transportation avenues are disrupted;
security concerns leading to the prolonged evacuation of our personnel;
damage to, or the inability to access, production facilities or other operating assets; and
inability of our service and equipment providers to deliver items necessary for us to conduct our operations.
Continued hostilities in the Middle East and Africa and the occurrence or threat of future terrorist attacks, or other armed conflict, could adversely affect the economiesrisks because of the U.S.marine environment.  Activities in offshore operations may pose risks because of the physical distance to oilfield service infrastructure and service providers.  Environmental remediation and other developed countries. A lower level of economic activity couldcosts resulting from spills or releases may result in a decline in energy consumption, which could cause our revenues and margins to decline and limit our future growth prospects. These risks could lead to increased volatility in prices for crude oil and condensate, NGLs and natural gas. In addition, these risks could increase instability in the financial and insurance markets and make it more difficult for us to access capital and to obtain the insurance coverage that we consider adequate.

Actions of governments through tax legislation or interpretations of tax law, and other changes in law, executive order and commercial restrictions could reduce our operating profitability, both in the U.S. and abroad. The U.S. government can prevent or restrict us from doing business in foreign countries. These restrictions and those of foreign governments have in the past limited our ability to operate in, or gain access to, opportunities in various countries and will continue to do so in the future. Changes in law could also adversely affect our results, including new regulations resulting in higher costs to transport our production by pipeline, rail car, truck or vessel or the adoption of government payment transparency regulations that could require us to disclose competitively sensitive commercial information or that could cause us to violate the non-disclosure laws of other countries.
Our level of indebtedness may limit our liquidity and financial flexibility.
As of December 31, 2017, our total debt was $5.5 billion, with no debt due within the next 24 months. Our indebtedness could have important consequences to our business, including, but not limited to, the following:
we may be more vulnerable to general adverse economic and industry conditions;
a portion of our cash flows from operating activities must be used to service our indebtedness and is not available for other purposes;
our flexibility in planning for, or reacting to, changes in our industry may be limited;
a financial covenant in our Credit Agreement stipulates that our total debt to capitalization ratio will not exceed 65% as of the last day of any fiscal quarter, and if exceeded, may make additional borrowings more expensive and affect our ability to plan for and react to changes in the economy and our industry;
we may be at a competitive disadvantage as compared to similar companies that have less debt; and
additional financing in the future for working capital, capital expenditures, acquisitions or development activities, general corporate or other purposes may have higher costs and more restrictive covenants.
We may incur additional debt in order to fund our capital expenditures, acquisitions or development activities, or for general corporate or other purposes. A higher level of indebtedness increases the risk that our financial flexibility may deteriorate. Our ability to meet our debt obligations and service our debt depends on future performance. General economic conditions, crude oil and condensate, NGLs and natural gas prices, and financial, business and other factors will affect our operations and our future performance. Many of these factors are beyond our control and we may not be able to generate sufficient cash flow to pay the interest on our debt, and future working capital, borrowings and equity financing may not be available to pay or refinance such debt. See Item 8. Financial Statements and Supplementary Data – Note 15 to the consolidated financial statements for a discussion of debt obligations.
A downgrade in our credit rating could negatively impact our cost of and ability to access capital, which could adversely affect our business.
We receive debt ratings from the major credit rating agencies in the United States. Due to the decline in crude oil and U.S. natural gas prices in recent years, credit rating agencies reviewed companies in the energy industry, including us. At December 31, 2017, our corporate credit ratings were: Standard & Poor's Global Ratings Services BBB- (stable); Fitch Ratings BBB (stable); and Moody's Investor Services, Inc. Ba1 (stable). The credit rating process is contingent upon a number of factors, many of which are beyond our control. A downgrade of our credit ratings could negatively impact our cost of capital and our ability to access the capital markets, increase the interest rate and fees we pay on our revolving credit facility, and may limit or reduce credit lines with our bank counterparties. We could also be required to post letters of credit or other forms of collateral for certain contractual obligations, which could increase our costs and decrease our liquidity or letter of credit capacity under our unsecured revolving credit facility. Limitations on our ability to access capital could adversely impact the level of our capital spending program, our ability to manage our debt maturities, or our flexibility to react to changing economic and business conditions.

Our commodity price risk management activities may prevent us from fully benefiting from commodity price increases and may expose us to other risks, including counterparty risk.
Global commodity prices are volatile. In order to mitigate commodity price volatility and increase the predictability of cash flows related to the marketing of our crude oil and natural gas, we, from time to time, enter into crude oil and natural gas hedging arrangements with respect to a portion of our expected production. While hedging arrangements are intended to mitigate commodity price volatility, we may be prevented from fully realizing the benefits of price increases above the price levels of the derivative instruments used to manage price risk. In addition, our hedging arrangements may expose us to the risk of financial loss in certain circumstances, including instances in which the counterparties to our hedging contracts fail to perform under the contracts. See Item 7A. Quantitative and Qualitative Disclosures about Market Risk.substantial liabilities.
Our business could be negatively impacted by cyberattacks targeting our computer and telecommunications systems and infrastructure, or targeting those of our third-party service providers.
Our business, like other companies in the oil and gas industry, has become increasingly dependent on digital technologies, including technologies that are managed by third-party service providers on whom we rely to help us collect, host or process information. Such technologies are integrated into our business operations and used as a part of our production and distribution systems in the U.S. and abroad, including those systems used to transport production to market, to enable communications, and to provide a host of other support services for our business. Use of the internet and other public networks for communications, services, and storage, including “cloud” computing, exposes all users (including our business) to cybersecurity risks.
While we and our third-party service providers commit resources to the design, implementation, and monitoring of our information systems, there is no guarantee that our security measures will provide absolute security. Despite these security measures, we may not be able to anticipate, detect, or prevent cyberattacks, particularly because the methodologies used by attackers change frequently or may not be recognized until launched, and because attackers are increasingly using techniques designed to circumvent controls and avoid detection. We and our third-party service providers may therefore be vulnerable to security events that are beyond our control, and we may be the target of cyber-attacks, as well as physical attacks, which could result in information security breaches and significant disruption to our business. Our information systems and related infrastructure have experienced attempted and actual minor breaches of our cybersecurity in the past, but we have not suffered any losses or breaches which had a material effect on our business, operations or reputation relating to such attacks; however, there is no assurance that we will not suffer such losses or breaches in the future. 
As cyberattacks continue to evolve, we may be required to expend significant additional resources to respond to cyberattacks, to continue to modify or enhance our protective measures, or to investigate and remediate any information systems and related infrastructure security vulnerabilities. We may also be subject to regulatory investigations or litigation relating from cybersecurity issues.

Our level of indebtedness may limit our liquidity and financial flexibility.
As of December 31, 2019, our total debt was $5.5 billion, and our next debt maturity is our $1.0 billion 2.8% senior unsecured notes due in 2022. Our indebtedness could have important consequences to our business, including, but not limited to, the following:
we may be more vulnerable to general adverse economic and industry conditions;
a portion of our cash flows from operating activities must be used to service our indebtedness and is not available for other purposes;
our flexibility in planning for, or reacting to, changes in our industry may be limited;
a financial covenant in our Credit Agreement stipulates that our total debt to capitalization ratio will not exceed 65% as of the last day of any fiscal quarter, and if exceeded, may make additional borrowings more expensive and affect our ability to plan for and react to changes in the economy and our industry;
we may be at a competitive disadvantage as compared to similar companies that have less debt; and
additional financing in the future for working capital, capital expenditures, acquisitions or development activities, general corporate or other purposes may have higher costs and more restrictive covenants.
We may incur additional debt in order to fund our capital expenditures, acquisitions or development activities, or for general corporate or other purposes. A higher level of indebtedness increases the risk that our financial flexibility may deteriorate. Our ability to meet our debt obligations and service our debt depends on future performance. General economic conditions, crude oil and condensate, NGLs and natural gas prices, and financial, business and other factors will affect our operations and our future performance. Many of these factors are beyond our control and we may not be able to generate sufficient cash flow to pay the interest on our debt, and future working capital, borrowings and equity financing may not be available to pay or refinance such debt. See Item 8. Financial Statements and Supplementary Data – Note 17 to the consolidated financial statements for a discussion of debt obligations.
Difficulty in accessing capital or a significant increase in our costs of accessing capital could adversely affect our business.
We receive debt ratings from the major credit rating agencies in the United States. Due to the volatility in crude oil and U.S. natural gas prices in recent years, credit rating agencies review companies in the energy industry periodically, including us. At December 31, 2019, our corporate credit ratings were: Standard & Poor’s Global Ratings Services BBB (stable); Fitch Ratings BBB (stable); and Moody’s Investor Services, Inc. Baa3 (stable). The credit rating process is contingent upon a number of factors, many of which are beyond our control. A downgrade of our credit ratings or other influences, including third-party groups promoting the divestment of fossil fuel equities or pressuring financial services companies to limit or curtail activities with fossil fuel companies, could negatively impact our cost of capital and our ability to access the capital markets, increase the interest rate and fees we pay on our revolving credit facility, and may limit or reduce credit lines with our bank counterparties. We could also be required to post letters of credit or other forms of collateral for certain contractual obligations, which could increase our costs and decrease our liquidity or letter of credit capacity under our unsecured revolving credit facility. Limitations on our ability to access capital could adversely impact the level of our capital spending budget, our ability to manage our debt maturities, or our flexibility to react to changing economic and business conditions.
Our commodity price risk management activities may prevent us from fully benefiting from commodity price increases and may expose us to other risks, including counterparty risk.
Global commodity prices are volatile. In order to mitigate commodity price volatility and increase the predictability of cash flows related to the marketing of our crude oil, NGLs, and natural gas, we, from time to time, enter into crude oil, NGLS, and natural gas hedging arrangements with respect to a portion of our expected production. While hedging arrangements are intended to mitigate commodity price volatility, we may be prevented from fully realizing the benefits of price increases above the price levels of the derivative instruments used to manage price risk. In addition, our hedging arrangements may expose us to the risk of financial loss in certain circumstances, including instances in which the counterparties to our hedging contracts fail to perform under the contracts. See Item 7A. Quantitative and Qualitative Disclosures about Market Risk.
Political and economic developments and changes in law or policy could adversely affect our operations and materially reduce our profitability and cash flows.
Local political and economic factors in U.S. and global markets could have a material adverse effect on us. We are subject to the political, geographic and economic risks and possible terrorist activities or other armed conflict attendant to doing business within or outside of the U.S. There are also many risks associated with operations in E.G. including the possibility that

the government may seize our property with or without compensation, may attempt to renegotiate or revoke existing contractual arrangements or may impose additional taxes or royalty burdens.
Changes in the U.S. or global political and economic environment or any U.S. or global hostility or the occurrence or threat of future terrorist attacks, or other armed conflict, could adversely affect the economies of the U.S. and other developed countries. A lower level of economic activity could result in a decline in energy consumption, which could cause our revenues and margins to decline and limit our future growth prospects. These risks could lead to increased volatility in prices for crude oil and condensate, NGLs and natural gas. In addition, these risks could increase instability in the financial and insurance markets and make it more difficult for us to access capital and to obtain the insurance coverage that we consider adequate.  These risks could also cause damage to, or the inability to access, production facilities or other operating assets and could limit our service and equipment providers ability to deliver items necessary for us to conduct our operations.
Actions of governments through tax legislation or interpretations of tax law, and other changes in law, executive order and commercial restrictions could reduce our operating profitability, both in the U.S. and abroad. The U.S. government can prevent or restrict us from doing business in foreign countries. These restrictions and those of foreign governments have in the past limited our ability to operate in, or gain access to, opportunities in various countries and will continue to do so in the future. Changes in U.S. or foreign laws could also adversely affect our results, including new regulations resulting in higher costs to transport our production by pipeline, rail car, truck or vessel or the adoption of government payment transparency regulations that could require us to disclose competitively sensitive commercial information or that could cause us to violate the non-disclosure laws of other countries.
Our operations may be adversely affected by pipeline, rail and other transportation capacity constraints.
The marketability of our production depends in part on the availability, proximity, and capacity of gathering and transportation pipeline facilities, rail cars, trucks and vessels. If any pipelines, rail cars, trucks or vessels become unavailable, we would, to the extent possible, be required to find a suitable alternative to transport our crude oil and condensate, NGLs and natural gas, which could increase the costs and/or reduce the revenues we might obtain from the sale of our production. Both the cost and availability of pipelines, rail cars, trucks, or vessels to transport our crude oilproduction could be adversely impacted by new and expected state or federal regulations relating to transportation of crude oil.
If we acquire crude oil and natural gas properties, our failure to fully identify existing and potential problems, to accurately estimate reserves, production rates or costs, or to effectively integrate the acquired properties into our operations could materially and adversely affect our business, financial condition and results of operations.
We typically seek the acquisition of crude oil and natural gas properties and leases.  Although we perform reviews of properties to be acquired in a manner that we believe is diligent and consistent with industry practices, reviews of records and properties may not necessarily reveal existing or potential problems, nor may they permit us to become sufficiently familiar with the properties in order to fully assess possible deficiencies and potential problems.  Even when problems with a property are identified, we often assume environmental and other risks and liabilities in connection with acquired properties pursuant to the acquisition agreements.  Moreover, there are numerous uncertainties inherent in estimating quantities of crude oil and natural gas (as previously discussed), actual future production rates and associated costs with respect to acquired properties.  Actual reserves, production rates and costs may vary substantially from those assumed in our estimates.  In addition, an acquisition may have a material and adverse effect on our business and results of operations, particularly during the periods in which the operations of the acquired properties are being integrated into our ongoing operations or if we are unable to effectively integrate the acquired properties into our ongoing operations.

We operate in a highly competitive industry, and many of our competitors are larger and have available resources in excess of our own.
The oil and gas industry is highly competitive, and many competitors, including major integrated and independent oil and gas companies, as well as national oil companies, are larger and have substantially greater resources at their disposal than we do. We compete with these companies for the acquisition of oil and natural gas leases and other properties. We also compete with these companies for equipment and personnel, including petroleum engineers, geologists, geophysicists and other specialists, required to develop and operate those properties and in the marketing of crude oil and condensate, NGLs and natural gas to end-users. Such competition can significantly increase costs and affect the availability of resources, which could provide our larger competitors a competitive advantage when acquiring equipment, leases and other properties. They may also be able to use their greater resources to attract and retain experienced personnel.
Many of our major projects and operations are conducted jointly with partners,other parties, which may decrease our ability to manage risk.
We often enter into arrangements to conduct certain business operations, such as oil and gas exploration and production with partnersother parties in order to share risks associated with those operations. However, these arrangements also may decrease our ability to manage risks and costs, particularly where we are not the operator. We could have limited influence over and control of the behaviors and performance of these operations. In addition, misconduct, fraud, noncompliance with applicable laws and regulations or improper activities by or on behalf of one or more of our partners or co-working interest owners could have a significant negative impact on our business and reputation.
Our operations are subject to business interruptions and casualty losses. We do not insure against all potential losses and therefore we could be seriously harmed by unexpected liabilities and increased costs.
Our United States E&P and International E&P operations are subject to unplanned occurrences, including blowouts, explosions, fires, loss of well control, spills, tornadoes, hurricanes and other adverse weather, tsunamis, earthquakes, volcanic eruptions or nuclear or other disasters, labor disputes and accidents. These same risks can be applied to the third-parties which transport our products from our facilities. A prolonged disruption in the ability of any pipelines, rail cars, trucks, or vessels to transport our production could contribute to a business interruption or increase costs.
Our operations are also subject to the additional hazards of pollution, releases of toxic gas and other environmental hazards and risks. These hazards could result in serious personal injury or loss of human life, significant damage to property and equipment, environmental pollution, impairment of operations and substantial losses to us. Various hazards have adversely affected us in the past, and damages resulting from a catastrophic occurrence in the future involving us or any of our assets or operations may result in our being named as a defendant in one or more lawsuits asserting potentially large claims or in our being assessed potentially substantial fines by governmental authorities. We maintain insurance against many, but not all, potential losses or liabilities arising from operating hazards in amounts that we believe to be prudent. Uninsured losses and liabilities arising from operating hazards could reduce the funds available to us for capital, exploration and investment spending and could have a material adverse effect on our business, financial condition, results of operations and cash flows. Historically, we have maintained insurance coverage for physical damage including at times resulting business interruption to our major onshore and offshore facilities, with significant self-insured retentions. In the future, we may not be able to maintain or obtain insurance of the type and amount we desire at reasonable rates. As a result of market conditions, premiums and deductibles for our insurance policies will change over time and could escalate. In some instances, certain insurance could become unavailable or available only for reduced amounts of coverage. For example, due to historical hurricane activity, the availability of insurance coverage for windstorms has changed and, in some instances, it is uneconomical. As a result, our exposure to losses from future windstorm activity has increased.
Litigation by private plaintiffs or government officials or entities could adversely affect our performance.
We currently are defending litigation and anticipate that we will be required to defend new litigation in the future. The subject matter of such litigation may include releases of hazardous substances from our facilities, privacy laws, contract disputes, royalty disputes or any other laws or regulations that apply to our operations. In some cases the plaintiff or plaintiffs seek alleged damages involving large classes of potential litigants, and may allege damages relating to extended periods of time or other alleged facts and circumstances. If we are not able to successfully defend such claims, they may result in substantial liability. We do not have insurance covering all of these potential liabilities. In addition to substantial liability, litigation may also seek injunctive relief which could have an adverse effect on our future operations.
For instance, government entities and other groups have filed lawsuits in California and New Yorkseveral states seeking to hold a wide variety of companies that produce fossil fuels liable for the alleged impacts of the greenhouse gas emissions and other alleged harm attributable to those fuels. The lawsuits allege damages as a result of global warming and the plaintiffs are seeking unspecified damages and abatement under various tort theories. Marathon Oil has been named as a defendant in sixseveral of these lawsuits, in California, along with numerous other companies. Similar lawsuits may be filed in other jurisdictions. The ultimate outcome and impact to us cannot

cannot be predicted with certainty, and we could incur substantial legal costs associated with defending these and similar lawsuits in the future.
In connection with our separation from MPC, MPC agreed to indemnify us for certain liabilities. However, there can be no assurance that the indemnity will be sufficient to protect us against the full amount of such liabilities, or that MPC’s ability to satisfy its indemnification obligations will not be impaired in the future.
Pursuant to the Separation and Distribution Agreement and the Tax Sharing Agreement we entered into with MPC in connection with the spin-off, MPC agreed to indemnify us for certain liabilities. However, third parties could seek to hold us responsible for any of the liabilities that MPC agreed to retain or assume, and there can be no assurance that the indemnification from MPC will be sufficient to protect us against the full amount of such liabilities, or that MPC will be able to fully satisfy its indemnification obligations. In addition, even if we ultimately succeed in recovering from MPC any amounts for which we are held liable, we may be temporarily required to bear these losses ourselves.
The spin-off could result in substantial tax liability.
We obtained a private letter ruling from the IRS substantially to the effect that the distribution of shares of MPC common stock in the spin-off qualified as tax free to MPC, us and our stockholders for U.S. federal income tax purposes under Sections 355 and 368 and related provisions of the U.S. Internal Revenue Code of 1986, as amended (the "Code"). If the factual assumptions or representations made in the request for the private letter ruling prove to have been inaccurate or incomplete in any material respect, then we will not be able to rely on the ruling. Furthermore, the IRS does not rule on whether a distribution such as the spin-off satisfies certain requirements necessary to obtain tax-free treatment under Section 355 of the Code. Rather, the private letter ruling was based on representations by us that those requirements were satisfied, and any inaccuracy in those representations could invalidate the ruling. In connection with the spin-off, we also obtained an opinion of outside counsel, substantially to the effect that, the distribution of shares of MPC common stock in the spin-off qualified as tax free to MPC, us and our stockholders for U.S. federal income tax purposes under Sections 355 and 368 and related provisions of the Code. The opinion relied on, among other things, the continuing validity of the private letter ruling and various assumptions and representations as to factual matters made by MPC and us which, if inaccurate or incomplete in any material respect, would jeopardize the conclusions reached by such counsel in its opinion. The opinion is not binding on the IRS or the courts, and there can be no assurance that the IRS or the courts would not challenge the conclusions stated in the opinion or that any such challenge would not prevail.
If, notwithstanding receipt of the private letter ruling and opinion of counsel, the spin-off were determined not to qualify under Section 355 of the Code, each U.S. holder of our common stock who received shares of MPC common stock in the spin-off would generally be treated as receiving a taxable distribution of property in an amount equal to the fair market value of the shares of MPC common stock received. That distribution would be taxable to each such stockholder as a dividend to the extent of our accumulated earnings and profits as of the effective date of the spin-off. For each such stockholder, any amount that exceeded those earnings and profits would be treated first as a non-taxable return of capital to the extent of such stockholder’s tax basis in its shares of our common stock with any remaining amount being taxed as a capital gain. We would be subject to tax as if we had sold all the outstanding shares of MPC common stock in a taxable sale for their fair market value and would recognize taxable gain in an amount equal to the excess of the fair market value of such shares over our tax basis in such shares.
Under the terms of the Tax Sharing Agreement we entered into with MPC in connection with the spin-off, MPC is generally responsible for any taxes imposed on MPC or us and our subsidiaries in the event that the spin-off and/or certain related transactions were to fail to qualify for tax-free treatment as a result of actions taken, or breaches of representations and warranties made in the Tax Sharing Agreement, by MPC or any of its affiliates. However, if the spin-off and/or certain related transactions were to fail to qualify for tax-free treatment because of actions or failures to act by us or any of our affiliates, we would be responsible for all such taxes.
We may issue preferred stock whose terms could dilute the voting power or reduce the value of Marathon Oil common stock.
Our restated certificate of incorporation authorizes us to issue, without the approval of our stockholders, one or more classes or series of preferred stock having such preferences, powers and relative, participating, optional and other rights, including preferences over Marathon Oil common stock respecting dividends and distributions, as our Board of Directors generally may determine. The terms of one or more classes or series of preferred stock could dilute the voting power or reduce the value of Marathon Oil common stock. For example, we could grant holders of preferred stock the right to elect some number of our directors in all events or on the happening of specified events or the right to veto specified transactions. Similarly, the repurchase or redemption rights or liquidation preferences we could assign to holders of preferred stock could affect the residual value of the common stock.

Item 1B. Unresolved Staff Comments
None.
Item 2. Properties
The location and general character of our principal crude oil and condensate, NGLs and natural gas properties and facilities, and other important physical properties have been described by segment under Item 1. Business.
Estimated net proved crude oil and condensate, NGLs and natural gas reserves are set forth in Item 8. Financial Statements and Supplementary Data – Supplementary Information on Oil and Gas Producing Activities – Estimated Quantities of Proved Oil and Gas Reserves. The basis for estimating these reserves is discussed in Item 1. Business – Reserves.
Item 3. Legal Proceedings
We are a defendant in a number of legal and administrative proceedings arising in the ordinary course of business, including, but not limited to, royalty claims, contract claims, tax disputes and environmental claims. While the ultimate outcome and impact to us cannot be predicted with certainty, we believe the resolution of these proceedings will not have a material adverse effect on our consolidated financial position, results of operations or cash flows.
See Item 8. Financial Statements and Supplementary Data – Note 2425 to the consolidated financial statements for a description of such legal and administrative proceedings.
Environmental Proceedings
The following is a summary of certain proceedings involving us that were pending or contemplated as of December 31, 2017,2019, under federal and state environmental laws.
Government entities have filed lawsuits in California and New Yorkseveral states seeking to hold a wide variety of companies that produce fossil fuels liable for the alleged impacts of the greenhouse gas emissions and other alleged harm attributable to those fuels. The lawsuits allege damages as a result of global warming and the plaintiffs are seeking unspecified damages and abatement under various tort theories. Marathon Oil has been named as a defendant in sixseveral of these lawsuits, in California, along with numerous other companies. Similar lawsuits may be filed in other jurisdictions. While the ultimate outcome and impact to us cannot be predicted with certainty, we believe that the claims made against us are without merit and will not have a material adverse effect on our consolidated financial position, results of operations or cash flow.
As of December 31, 2017,2019, we have sites across the country where remediation is being sought under environmental statutes, both federal and state, or where private parties are seeking remediation through discussions or litigation.  Based on currently available information the accrued amount to address the clean-up and remediation costs connected with these sites is not material.
In December 2019, we received a Notice of Violation from the North Dakota Department of Environmental Quality and a verbal notice of enforcement in January 2020 from the North Dakota Industrial Commission, related to a release of produced water in North Dakota. In January 2020, we received a Notice of Violation from the EPA related to the Clean Air Act. Each enforcement action will likely result in monetary sanctions in excess of $100,000; however, we do not believe these enforcement actions would have a material adverse effect on our consolidated financial position, results of operations or cash flow. 

If our assumptions relating to these costs prove to be inaccurate, future expenditures may exceed our accrued amounts. 
Item 4. Mine Safety Disclosures
Not applicable.

25



PART II
Item 5.   Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
The principal market on which Marathon Oil common stock is traded is the New York Stock Exchange ("NYSE"(“NYSE”), and is traded under the trading symbol ‘MRO’. As of January 31, 2018,2020, there were 31,47228,346 registered holders of Marathon Oil common stock.
The following table reflects high and low sales prices for Marathon Oil common stock and the related dividend per share by quarter for the past two years:
 2017 2016
(Dollars per share)High Price   Low Price Dividends   High Price   Low Price Dividends  
First Quarter$18.18 $14.61 $0.05 $12.82 $6.73 $0.05
Second Quarter$16.60 $11.35 $0.05 $15.27 $10.53 $0.05
Third Quarter$13.73 $10.77 $0.05 $16.80 $12.90 $0.05
Fourth Quarter$17.26 $13.48 $0.05 $18.80 $12.78 $0.05
Full Year$18.18 $10.77 $0.20 $18.80 $6.73 $0.20
Dividends – Our Board of Directors intends to declare and pay dividends on Marathon Oil common stock based on our financial condition and results of operations, although it has no obligation under Delaware law or the Restated Certificaterestated certificate of Incorporationincorporation to do so. In determining our dividend policy, the Board of Directors will rely on our consolidated financial statements. Dividends on Marathon Oil common stock are limited to our legally available funds.
The following table provides information about purchases by Marathon Oil and its affiliated purchaser, during the quarter ended December 31, 2017,2019, of equity securities that are registered by Marathon Oil pursuant to Section 12 of the Securities Exchange Act of 1934:
Period
Total Number of
Shares
Purchased(a)
 
Average
Price Paid
per Share
 
Total Number of
Shares Purchased
as Part of Publicly
Announced Plans
or Programs(b)
 
Approximate
Dollar Value of
Shares that May
Yet Be Purchased
Under the Plans
or Programs(b)
10/01/17 – 10/31/1749,046
 $13.38 
 $1,500,285,529
11/01/17 – 11/30/172,813
 $14.62 
 $1,500,285,529
12/01/17 – 12/31/17
 
 
 $1,500,285,529
Total51,859
 $13.45 
  
Period
Total Number of Shares Purchased(a)
 Average Price Paid per Share 
Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs(b)
 
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs(b)
10/01/2019 - 10/31/20191,619,594
 $11.65
 1,567,951
 $1,452,022,646
11/01/2019 - 11/30/2019155,575
 $11.56
 150,386
 $1,450,286,198
12/01/2019 - 12/31/20193,515,651
 $12.86
 3,514,490
 $1,405,076,614
Total5,290,820
 $12.45
 5,232,827
  
(a) 
51,85957,993 shares of restricted stock were delivered by employees to Marathon Oil, upon vesting, to satisfy tax withholding requirements.
(b) 
In January 2006, we announced a $2.0$2 billion share repurchase program. Our Board of directorsDirectors subsequently increased the authorization for repurchases under the program by $500 million in January 2007, by $500 million in May 2007, by $2.0$2 billion in July 2007, and by $1.2 billion in December 2013 and by $950 million in July 2019 for a total authorized amount of $6.2$7.2 billion. The remaining share repurchase authorization as of December 31, 2017 is $1.5 billion. No repurchases were made under the program in 2017.
Purchases under the program are made at our discretion and may be in either open market transactions, including block purchases, or in privately negotiated transactions using cash on hand, cash generated from operations, proceeds from potential asset sales or cash from available borrowings to acquire shares. This program may be changed based upon our financial condition or changes in market conditions and is subject to termination by the Board of Directors prior to completion. Shares repurchased as of December 31, 2019 were held as treasury stock.


26



Item 6.   Selected Financial Data
Year Ended December 31,Year Ended December 31,
(In millions, except per share data)2017 2016 2015 2014 20132019 2018 2017 2016 2015
Statement of Income Data(c)(a)
  
        
      
Revenues$4,373
 $3,170
 $4,635
 $9,238
 $9,731
Total revenues and other income$5,190
 $6,582
 $4,765
 $3,787
 $4,953
Income (loss) from continuing operations(830) (2,087) (1,701) 710
 710
480
 1,096
 (830) (2,087) (1,701)
Discontinued operations(b)(4,893) (53) (503) 2,336
 1,043

 
 (4,893) (53) (503)
Net income (loss)(5,723) (2,140) (2,204) 3,046
 1,753
480
 1,096
 (5,723) (2,140) (2,204)
Per Share Data(c)(a)
                  
Basic:                  
Income (loss) from continuing operations$(0.97) $(2.55) $(2.51) $1.04
 $1.01
$0.59
 $1.30
 $(0.97) $(2.55) $(2.51)
Discontinued operations$(5.76) $(0.06) $(0.75) $3.44
 $1.48
Discontinued operations(b)
$
 $
 $(5.76) $(0.06) $(0.75)
Net income (loss)$(6.73) $(2.61) $(3.26) $4.48
 $2.49
$0.59
 $1.30
 $(6.73) $(2.61) $(3.26)
Diluted:                  
Income (loss) from continuing operations$(0.97) $(2.55) $(2.51) $1.04
 $1.00
$0.59
 $1.29
 $(0.97) $(2.55) $(2.51)
Discontinued operations$(5.76) $(0.06) $(0.75) $3.42
 $1.47
Discontinued operations(b)
$
 $
 $(5.76) $(0.06) $(0.75)
Net income (loss)$(6.73) $(2.61) $(3.26) $4.46
 $2.47
$0.59
 $1.29
 $(6.73) $(2.61) $(3.26)
Statement of Cash Flows Data(b)
                  
Additions to property, plant and equipment related to continuing operations$(1,974) $(1,204) $(3,485) $(4,937) $(4,170)$(2,550) $(2,753) $(1,974) $(1,204) $(3,485)
Dividends paid170
 162
 460
 543
 508
(162) (169) (170) (162) (460)
Dividends per share$0.20
 $0.20
 $0.68
 $0.80 $0.72$0.20
 $0.20
 $0.20
 $0.20
 $0.68
Balance Sheet Data at December 31                  
Total assets$22,012
 $31,094
 $32,311
 $35,983
 $35,588
$20,245
 $21,321
 $22,012
 $31,094
 $32,311
Total long-term debt, including capitalized leases5,494
 6,581
 7,268
 5,285
 6,352
5,501
 5,499
 5,494
 6,581
 7,268
Leases:(c)
         
ROU asset199
 
 
 
 
Current portion of long-term lease liability101
 62
 29
 30
 31
Long-term lease liability107
 155
 90
 146
 147
(a) 
Includes impairments to producing properties of $229 million, $67 million, $381 million, $132 million and $96 million in 2017, 2016, 2015, 2014 and 2013 and impairments to unproved properties of $246 million, $195 million, $655 million, $306 million and $572 million in 2017, 2016, 2015, 2014 and 2013 (see Item 8. Financial Statements and Supplementary Data – Note 10 to the consolidated financial statements). Includes a goodwill impairment of $340 million in 2015 related to the U.S. E&P reporting unit (see Item 8. Financial Statements and Supplementary Data – Note 12 to the consolidated financial statements).
(b)
We closed on the sale of our Canada business in 2017 which resulted in an after-tax non-cash impairment charge of $4.96 billion and our Angola assets and Norway business in 2014 (see Item 8. Financial Statements and Supplementary Data – Note 5 to the consolidated financial statements). The applicable periods have been recast to reflect as discontinued operations.
(c)
December 31, 2016 includes the increase of a valuation allowance on certain of our deferred tax assets for $1,346 million (seemillion.
(b)
We closed on the sale of our Canada business in 2017 and have reflected this business as Discontinued Operations in the periods presented.
(c)
Note the prospective adoption of the lease accounting standard on January 1, 2019. Therefore, current and long-term portions for leases in years 2018 through 2015 do not reflect adoption of the new lease accounting standard. See Item 8. Financial Statements and Supplementary Data - Note 92 and Note 13 to the consolidated financial statements).statements for further information.



Supplemental information affecting comparability of selected financial data is shown below.

 Year Ended December 31,
(In millions)2019 2018 2017 2016 2015
Proved property impairment$24
 $75
 $229
 $67
 $381
Unproved property impairment98
 208
 246
 195
 655
Goodwill impairment
 
 
 
 340


27




Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations
The following discussion and analysis of our financial condition and results of operations should be read in conjunction with the information under Item 8. Financial Statements and Supplementary Data and the other financial information found elsewhere in this Form 10-K. The following discussion includes forward-looking statements that involve certain risks and uncertainties. See "Disclosures“Disclosures Regarding Forward-Looking Statements"Statements” (immediately prior to Part I) and Item 1A. Risk Factors.Factors.
Each of our two reportable operating segments isare organized by geographic location and managed based upon both geographic location andaccording to the nature of the products and services it offers.offered.
United States E&P – explores for, produces and markets crude oil and condensate, NGLs and natural gas in the United StatesStates;
International E&P – explores for, produces and markets crude oil and condensate, NGLs and natural gas outside of the United States and produces and markets products manufactured from natural gas, such as LNG and methanol, in E.G.
Executive SummaryOverview
During 2017, we continuedWe are an independent exploration and production company based in Houston, Texas. Our strategy is to strengthendeliver competitive and improving corporate level returns by focusing our capital investment in the lower cost, higher margin U.S. resource plays (the Eagle Ford in Texas, the Bakken in North Dakota, STACK and SCOOP in Oklahoma and Northern Delaware in New Mexico). We will continue to be guided by maintaining a strong balance sheet, transformprioritizing sustainable cash flow over a wide range of commodity prices and returning capital to shareholders.
Key 2019 highlights include:
Simplifying and concentrating our portfolio and manage
In the first quarter of 2019, we closed the sale of our capital and operating costs. Through multiple financing transactionsworking interest in 2017, we have reduced total debt by approximately $1.75 billion which will result inthe Droshky field (Gulf of Mexico) for a reduction to our future annual interest expensepre-tax gain of approximately $115$42 million. Additionally,
In the second quarter of 2019, we closed on the sale of our Canadian business for approximately $2.5 billion and acquired acreage15% non-operated interest in the Permian basin, including over 70,000 net acresAtrush block in Northern DelawareKurdistan for approximately $1.9 billion.proceeds of $63 million, before closing adjustments.
As discussed in Item 8. Financial Statements and Supplementary Data – Note 5 to the consolidated financial statements,In July 2019, we closed on the sale of our CanadianU.K. business which has been reflected as discontinued operations and is excluded from operations in all periods presented.
Key highlights includefor proceeds of approximately $95 million, reflecting the following:
Liquidity and corporate financing
Ended 2017 with liquidityassumption by the buyer of $4.0 billion, comprised of $563 million in cashworking capital and cash equivalents and an undrawn $3.4 billion revolving credit facility, which was increased from $3.3 billionequivalent balances, asset retirement obligations of $966 million, as well as pension obligations.
In the third quarter of 2019, we secured a 25% non-operated working interest partner in July 2017. Remaining proceedsour Louisiana Austin Chalk acreage.
During the fourth quarter of $750 million from the sale of our Canadian business are scheduled to be received2019, we acquired approximately 18,000 net acres in the first quarter of 2018.Eagle Ford for $191 million and approximately 40,000 acres in a Texas Delaware oil play in West Texas for $106 million.
Strengthened balance sheet and liquidity
In third quarter 2017,July 2019, the Board of Directors authorized a $950 million increase to our share purchase program. During 2019, we issued $1returned additional capital to shareholders by acquiring 24 million of common shares at a cost of $345 million, with $1.4 billion of 4.4% senior unsecured notes due in 2027repurchase authorization remaining at year-end.
Cash provided by operating activities from continuing operations decreased by 15%, compared to the same period last year, to $2.7 billion primarily as a result of decreased commodity price realizations.
During the fourth quarter 2019, completed three leverage neutral finance transactions that extend maturities, generate annual cash cost savings, and redeemed approximately $1.75 billion of debt due in 2017, 2018reflect our commitment to maintaining a strong balance sheet and 2019. This offering and redemption reduced our future annual interest expense by approximately $64 million.
In December 2017, we redeemed $1 billion of 5.125% municipal revenue bonds due in 2037 in a refunding transaction that preserved our ability to remarket up to $1 billion of tax-exempt municipal bonds prior to 2037. This redemption reduced our future annual interest expense by approximately $51 million.
Simplifying our portfolio
We closed on the sale of our Canadian business for approximately $2.5 billion with over $1.8 billion in proceeds received to date and $750 million to be received in first quarter 2018.
We closed on multiple Permian basin acquisitions for approximately $1.9 billion of cash on hand.investment grade credit ratings at all primary rating agencies.
Financial and Operationaloperational results
Total 2017 net sales volumes from continuing operations are 379for the year were 414 mboed, including Libya, which is 10% higher323 mboed in the U.S. Our U.S. net sales volumes increased 8% and our wells to sales increased 11% compared to 2016. This includes a 12% increase in sales volumes from the U.S resource plays to 217 mboed within our United States E&P segment.
Due to improved cost structure and higher sales volumes, our production expense rate in our United States E&P segment decreased 7% to $5.57 per boe in 2017 compared to last year. In our International E&P segment, our production expense rate decreased 14% to $4.33 per boe in 2017 primarily due to an increase in sales volumes in E.G. and Libya.2018.
Added proved reserves of 193110 mmboe for a reserve replacement ratio from continuing operations of 140%74%.
Net cash provided by operating activities in 2017 was $2.0 billion, compared to $901 million in 2016 primarily as a result of improved price realizations, increased sales volumes and lower unit production expenses.



Our net lossincome per share from continuing operations was $0.97$0.59 in 20172019 as compared to a net lossincome per share of $2.55$1.30 last year. Included in the 20172019 net lossincome are:
An increaseA decrease in sales and other operating revenues of over 40%approximately 14% compared to $4.2 billion2018, as a result of decreased commodity price realizations and lower net sales volumes in our International segment due to dispositions, partially offset by

increased net sales volumes in the U.S.
Our net gain on disposal of assets decreased $269 million in 2019 primarily due to improved price realizations and increased sales volumes.the sale of our Libya subsidiary for a pre-tax gain of $255 million in 2018.
Our sales volumes from continuing operations increased 10% while production expense remained flat during 2017 as a result of improved cost structure.
Depreciation, depletion and amortization expense increased 10% to $2.4 billion due to our increase in sales volumes from continuing operations.
Exploration and impairment expenses increaseddecreased by $248$191 million to $638$173 million, year over year, primarily due toa result of non-cash impairment charges on proved and unproved properties primarily as a result ofin the anticipated sales of certain non-core international assets and due to lower forecasted long-term commodity prices.
Our provision for income taxes was $376 million in 2017 primarily as a result of our full valuation allowance on our net federal deferred tax assets throughout 2017 and the effects of our foreign operations.prior year. See Item 8. Financial Statements and Supplementary Data - Note 711 to the consolidated financial statements for further detail.
Production expense decreased 15% during 2019 as a discussionresult of dispositions in our International segment and our focus on reducing costs in our U.S. resource plays.
Income tax benefit was $88 million in 2019 primarily as a result of the effects$126 million settlement of the 2010-2011 U.S. Federal Tax Reform Legislation.Audit, primarily related to AMT credits. See Consolidated Results of Operations: 2019 compared to 2018 section below and Item 8. Financial Statements and Supplementary Data - Note 8 and Note 25 to the consolidated financial statements for further detail.
Outlook
Capital Development ProgramBudget
On February 12, 2020, we announced our total 2020 Capital Budget of $2.4 billion, which includes $2.2 billion of development capital and $200 million to fund REx. Our $2.3 billion 2018 Capital Development Program will be over 90%2020 development capital budget is weighted towards the four U.S. resource plays with approximately 70% allocated to our U.S. resource plays. Almost 60% of this development budget will be allocated to the high-return Eagle Ford and Bakken assets, which have demonstrated step-change performance improvements while operating at scale. Approximately one-third ofand the development budget will beremaining allocated to ourbetween the Northern Delaware and Oklahoma assets, where the majority of drilling activity will be transitioning to multi-well pads, while continuing strategic delineation and appraisal.Oklahoma.
Our 20182020 Capital Development ProgramBudget is broken down by reportable operating segment in the table below:
(In millions)Capital Development Program
United States E&P 
   Eagle Ford$710
   Bakken590
   Oklahoma410
   Northern Delaware380
Total United States E&P$2,090
International E&P and corporate other (a)
210
Total Capital Development Program$2,300
(In millions)Capital Budget
United States(a)
$2,370
International and corporate other(b)
30
Total Capital Budget$2,400
(a)
Includes approximately $200 million of spend to fund REx.
(b)
International and corporate other includes our International segment and other corporate items.
(a) International E&P and corporate other includes our International E&P segment and other corporate items


Operations
Our netNet sales volumes from continuing operations, including Libya, averaged 379 mboed, 345 mboed and 385 mboed for 2017, 2016 and 2015, respectively. This 10% increaseincreased by 8% in 2017 was primarily due to2019 in the U.S. segment with new wells to sales in ouracross the U.S. resource plays, our acquisitionsplays. The International segment had lower net sales volumes in Northern Delaware2019 as a result of dispositions and the resumption of salesnatural decline in Libya.
E.G. The following table presents a summary of our sales volumes for each of our segments. Refersegments (refer to the Results of Operations section for a price-volume analysis for each of the segments.segments).
Net Sales Volumes2017 Increase
(Decrease)
 2016 Increase
(Decrease)
 2015
United States E&P (mboed)
234 5% 223 (17)% 269
International E&P (a) (mboed)
145 19% 122 5 % 116
Total Continuing Operations (mboed)
379 10% 345 (10)% 385
Net Sales Volumes2019 Increase
(Decrease)
 2018 Increase
(Decrease)
 2017
United States (mboed)
323
 8 % 298 27 % 234
International (mboed)(a)
91
 (25)% 122 (16)% 145
Total continuing operations (mboed)
414
 (1)% 420 11 % 379
(a)     Years ended December 31, 2017, 2016 and 2015 include net sales volumes relating to Libya of 20 mboed, 3 mboed and none, respectively.



(a)
We closed on the sale of our Libya subsidiary in the first quarter of 2018, our interest in the Atrush block in Kurdistan in the second quarter of 2019 and our U.K. business in the third quarter of 2019. See Item 8. Financial Statements and Supplementary Data - Note 5 to the consolidated financial statements for further information on dispositions.

United States E&P
Net sales volumes in the segment were higher during the year ended December 31, 2019 primarily as a result of new wells to sales in our U.S. resource plays. The following tables provide additional detaildetails regarding net sales volumes, sales mix and operational drilling activity for our significant operations within this segment:
Net Sales Volumes2017 Increase
(Decrease)
 2016 Increase
(Decrease)
 20152019 Increase
(Decrease)
 2018 Increase
(Decrease)
 2017
Equivalent Barrels (mboed)
          
Oklahoma54 54% 35 40% 25
Eagle Ford101 (4)% 105 (22)% 134106
 (2)% 108
 7 % 101
Bakken56 4% 54 (8)% 59103
 23 % 84
 50 % 56
Oklahoma78
 5 % 74
 37 % 54
Northern Delaware6 100%  —% 28
 40 % 20
 233 % 6
Other United States(a)
17 (41)% 29 (43)% 518
 (33)% 12
 (29)% 17
Total United States E&P (mboed)234 5% 223 (17)% 269
Total United States (mboed)
323
 8 % 298
 27 % 234
(a) Year
Sales Mix - U.S. Resource Plays - 2019Eagle Ford Bakken Oklahoma Northern Delaware Total
Crude oil and condensate59% 84% 27% 58% 59%
Natural gas liquids21% 9% 28% 20% 18%
Natural gas20% 7% 45% 22% 23%
Drilling Activity - U.S. Resource Plays2019 2018 2017
Gross Operated     
Eagle Ford:     
Wells drilled to total depth127 123 182
Wells brought to sales146 149 157
Bakken:     
Wells drilled to total depth73 78 90
Wells brought to sales105 80 39
Oklahoma:     
Wells drilled to total depth68 55 86
Wells brought to sales69 57 73
Northern Delaware:     
Wells drilled to total depth51 69 27
Wells brought to sales54 52 18
Eagle Ford– In 2019, our net sales volumes were 106 mboed including oil sales of 63 mbbld. We brought 146 gross company-operated wells to sales across Karnes, Atascosa, and Gonzales counties with strong initial production rates. The third and fourth quarters of 2019 represented the two strongest quarters in the history of the asset on a 30-day initial production basis for oil. Eagle Ford fourth quarter oil mix increased to 63%, up from 57% in the prior-year quarter. Completed well costs during fourth quarter averaged $5.1 million, or 8% below the 2018 average.
Bakken – In 2019, our net sales volumes of 103 mboed with oil sales volume of 86 mbbld. We brought 105 gross company-operated wells to sales in 2019.Fourth quarter 2019 was characterized by strong operations with the asset establishing new quarterly records for both drilling feet per day and completion stages per day. We continue to deliver capital efficiency and accretive financial returns, highlighted by a recent four-well pad in Myrmidon at an average completed well cost of $4.3 million. Wells to sales during the fourth quarter 2019 had an average completed well cost below $5 million, 17% below the 2018 average.
Oklahoma – In 2019, our net sales volumes were 78 mboed including oil sales volumes of 21 mbbld. During the fourth quarter, oil mix rose to 29% in 2019 from 24% in the fourth quarter 2018. We brought 69 gross company-operated wells to sales in 2019, including nine wells targeting the Springer formation in the SCOOP in the fourth quarter 2019. The nine Springer wells are demonstrating solid productivity.

Northern Delaware – Our 2019 net sales volumes were 28 mboed with oil sales volumes of 16 mbbld. We brought 54 gross company-operated wells to sales, with a focus on the delineation of our Red Hills acreage in 2019. Since this transition to Red Hills delineation, we have brought online nine Upper Wolfcamp wells and four Bone Spring wells. We continue to advance learnings, reduce cost structure, and improve margins, exiting the year with about 90% of water and oil on pipe.
International
Net sales volumes in the segment were lower during the year ended December 31, 2017 includes decreases2019 primarily due to E.G. planned maintenance activities and natural field decline, coupled with the dispositions of 14 mboed, consisting of the disposition of Wyomingour U.K. business and certainour non-operated CO2 and waterflood assets in West Texas and New Mexico in 2016. Year ended December 31, 2016 decreases relating to assets sold were 23 mboed, primarily consisting of Wyoming, West Texas, East Texas, North Louisiana and certain Gulf of Mexico assets. See Item 8. Financial Statements and Supplementary Data - Note 5 to the consolidated financial statements for information about these dispositions.
Sales Mix - U.S. Resource Plays - 2017 Oklahoma Eagle Ford Bakken Northern Delaware Total
Crude oil and condensate 28% 58% 83% 66% 57%
Natural gas liquids 26% 21% 10% 8% 19%
Natural gas 46% 21% 7% 26% 24%
Drilling Activity - U.S. Resource Plays2017 2016 2015
Gross Operated     
Oklahoma:     
Wells drilled to total depth86 33 20
Wells brought to sales73 28 21
Eagle Ford:     
Wells drilled to total depth182 168 251
Wells brought to sales157 168 276
Bakken:     
Wells drilled to total depth90 3 35
Wells brought to sales39 13 56
Northern Delaware     
Wells drilled to total depth27  
Wells brought to sales18  
Eagle Ford – Our net sales volumes were 101 mboed in 2017, 4% lower compared to 2016. We brought fewer wells to sales in 2017, while we increased well productivity through completion optimization and efficiency gains.
Bakken – Our net sales volumes were 56 mboed in 2017 compared to 54 mboed in 2016. In 2017, we improved well performance with continued application of high intensity completions. During the year, we set a new recordinterest in the Williston Basin for the highest 30-day initial production oil rate.
Oklahoma – Our net sales volumesAtrush block in 2017 increased by 54% to 54 mboed compared to year ended 2016. Our activity during 2017 was concentrated in the STACK and was focused on leasehold capture, delineation drilling and infill spacing pilots.
Northern Delaware – Our net sales volumes were 6 mboed in 2017 which reflected a partial year of production following the second quarter 2017 closing of the BC Operating and Black Mountain assets. During 2017 we focused our activity on delineation and leasehold capture across our position in Eddy and Lea Counties, New Mexico.

International E&P
Kurdistan. The following table provides details regarding net sales volumes from continuingfor our significant operations within this segment:
Net Sales Volumes2017 Increase
(Decrease)
 2016 Increase
(Decrease)
 20152019 Increase
(Decrease)
 2018 Increase
(Decrease)
 2017
Equivalent Barrels (mboed)
              
Equatorial Guinea109 7% 102 5% 9785
 (12)% 97
 (11)% 109
United Kingdom(a)
14 (18)% 17 (11)% 195
 (62)% 13
 (7)% 14
Libya20 567% 3 100% 
 (100)% 8
 (60)% 20
Other International2 100%  —% 1
 (75)% 4
 100 % 2
Total International E&P (mboed)
145 19% 122 5% 116
Total International91
 (25)% 122
 (16)% 145
Equity Method Investees 
  
   

   

  
LNG (mtd)
6,423 9% 5,874 —% 5,8844,933
 (15)% 5,805
 (10)% 6,423
Methanol (mtd)
1,374 1% 1,358 45% 9371,082
 (13)% 1,241
 (10)% 1,374
Condensate & LPG (boed)
14,501 8% 13,430 10% 12,208
Condensate and LPG (boed)
11,104
 (15)% 13,034
 (10)% 14,501
(a)     Includes natural gas acquired for injection and subsequent resale.
Equatorial Guinea – Net sales volumes in 2017 were higher than 2016 as a result of the completion and start-up of our Alba field compression project in mid-2016 and lower volumes in first quarter 2016 due to a planned turnaround. Additionally, in April 2017 we received host government approval to develop Block D offshore E.G. through unitization with the Alba field.
United Kingdom – Net sales volumes in 2017 decreased compared to 2016 primarily as a result of planned turn-around activity at the Brae and Foinaven complexes and the temporary shut-down of the outside-operated Forties Pipeline System during fourth quarter 2017.
Libya – While civil and political unrest has interrupted operations in recent years, our production resumed in October 2016. During December 2016, liftings resumed from the Es Sider crude oil terminal. During 2017, sales volumes and production continued, except for a brief interruption in March 2017 due to civil unrest.
Equatorial Guinea – Net sales volumes in 2019 were lower than 2018 as a result of the planned triennial turnaround completed in 2019 and natural field decline.
United Kingdom – During 2019, we closed on the sale of our U.K. business. See Note 5 to the consolidated financial statements for further information.
Libya – During the first quarter of 2018, we closed on the sale of our subsidiary in Libya. See Note 5 to the consolidated financial statements for further information.
Equity Method Investees – Net sales volumes in 2019 are tied to the volumes in Equatorial Guinea which were lower in the current year as noted above.
Market Conditions
Crude oil natural gas and NGLcondensate and NGLs benchmarks increaseddecreased in 20172019 as compared to the same period in 2016.2018. As a result, we experienced increaseddecreased price realizations associated with those benchmarks. We continue to expect crude oil and condensate, NGLs and natural gas and NGLs benchmark prices to remain volatile based on global supply and demand, which will result in increases or decreases in our price realizations.realizations during 2020. See Item 1A. Risk Factors and Item 7. Management’s Discussion and Analysis of Financial Condition – Critical Accounting Estimates for further discussion of how declines in these commodity prices could impact us. Additional detail on market conditions, including our average price realizations and benchmarks for crude oil, NGLs and natural gas relative to our operating segments, follows.

United States E&P
 The following table presents our average price realizations and the related benchmarks for crude oil and condensate, NGLs and natural gas for 2017, 20162019, 2018 and 2015:2017.
 2017 Increase (Decrease) 2016 Increase (Decrease) 20152019 Increase (Decrease) 2018 Increase (Decrease) 2017
Average Price Realizations (a)
                   
Crude Oil and Condensate (per bbl) (b)
 
$49.35
 28% 
$38.57
 (11)% 43.50
Natural Gas Liquids (per bbl)
 20.55
 56% 13.15
 (2)% 13.37
Total Liquid Hydrocarbons (per bbl)
 42.31
 29% 32.71
 (14)% 37.85
Natural Gas (per mcf) (c)
 2.84
 19% 2.38
 (11)% 2.66
Crude oil and condensate (per bbl)(b)
$55.80
 (12)% $63.11
 28 % $49.35
Natural gas liquids (per bbl)
14.22
 (42)% 24.54
 19 % 20.55
Natural gas (per mcf)(c)
2.18
 (18)% 2.65
 (7)% 2.84
Benchmarks   

   

    

   

  
WTI crude oil average of daily prices (per bbl)
 
$50.85
 17% 
$43.47
 (11)% 48.76
$57.04
 (12)% $64.90
 28 % $50.85
Magellan East Houston (“MEH”) crude oil average of daily prices (per bbl)(d)
61.96
        
LLS crude oil average of daily prices (per bbl)(d)
 54.04
 20% 45.02
 (14)% 52.33
  

 70.04
 30 % 54.04
Mont Belvieu NGLs (per bbl) (d)(e)
 23.76
 37% 17.40
 3 % 16.94
17.81
 (33)% 26.75
 21 % 22.04
Henry Hub natural gas settlement date average (per mmbtu)
 3.11
 26% 2.46
 (8)% 2.66
2.63
 (15)% 3.09
 (1)% 3.11
(a) 
Excludes gains or losses on commodity derivative instruments.
(b) 
Inclusion of realized gains (losses) on crude oil derivative instruments would have increasedimpacted average liquid hydrocarbon price realizations by $0.67 per barrel bybbl, $(4.60) per bbl, and $0.75 $0.92,per bbl for 2019, 2018, and $1.24 for 2017, 2016, and 2015.2017.
(c) 
Inclusion of realized gains (losses) on natural gas derivative instruments would have a minimal impact on average price realizations for the periods presented.
(d) 
Benchmark change due to industry shift to MEH in the first quarter of 2019.
(e)
Bloomberg Finance LLP: Y-grade Mix NGL of 50%55% ethane, 25% propane, 10%5% butane, 5%8% isobutane and 10%7% natural gasoline.
Crude oil and condensateOur crude oil and condensate pricePrice realizations may differ from the benchmarkbenchmarks due to the quality and location of the product.
Natural gas liquids – The majority of our NGLssales volumes are sold at reference to Mont Belvieu prices.
Natural gasA significant portion of our natural gas production in the U.S. isvolumes are sold at bid-week prices, or first-of-month indices relative to our specific producing areas.  
International E&P
The following table presents our average price realizations and the related benchmark for crude oil for 2017, 20162019, 2018 and 2015:2017.
  2017 Increase (Decrease) 2016 (Decrease) 2015
Average Price Realizations          
Crude Oil and Condensate (per bbl)
 
$53.05
 27% 
$41.70
 (12)% 
$47.50
Natural Gas Liquids (per bbl)
 3.15
 49% 2.11
 (25)% 2.81
Total Liquid Hydrocarbons (per bbl)
 43.36
 35% 32.10
 (12)% 36.67
Natural Gas (per mcf)
 0.55
 6% 0.52
 (24)% 0.68
Benchmark   

   

  
Brent (Europe) crude oil (per bbl)(a)
 
$54.25
 25% 
$43.55
 (17)% 
$52.35
 2019 Increase (Decrease) 2018 Increase (Decrease) 2017
Average Price Realizations         
Crude oil and condensate (per bbl)
$53.09
 (17)% $64.25
 21 % $53.05
Natural gas liquids (per bbl)
1.40
 (38)% 2.27
 (28)% 3.15
Natural gas (per mcf)
0.33
 (39)% 0.54
 (2)% 0.55
Benchmark  

   

  
Brent (Europe) crude oil (per bbl)(a)
$64.36
 (9)% $71.06
 31 % $54.25
(a) 
Average of monthly prices obtained from the United States Energy Information Agency website.


OurUnited Kingdom
Crude oil and condensate Generally sold in relation to the Brent crude benchmark. We closed on the sale of our U.K. liquid hydrocarbonbusiness on July 1, 2019.
Equatorial Guinea
Crude oil and condensate Alba Field liquids production is primarily condensate and generally sold in relation to the Brent crude benchmark. Our production fromAlba Plant LLC processes the rich hydrocarbon gas which is supplied by the Alba field in E.G. is condensate and gas. Condensate is sold at market prices and the gas is shipped to the onshoreField under a

fixed-price long term contract. Alba Plant. The Alba Plant LLC extracts NGLs and secondary condensate which have been supplied under a long-term contract at a fixed price, leaving dry natural gas. The extracted NGLs and secondary condensate areis then sold by Alba Plant LLC at market prices, with our share of its income/lossthe revenue reflected in income from equity method investments andon the consolidated statements of income. Alba Plant LLC delivers the processed dry natural gas fromto the Alba Plant is suppliedField for distribution and sale to AMPCO and EGHoldings under long-term contracts at fixed prices. Therefore, our reported average realized prices for condensate, NGLs and naturalEG LNG.
Natural gas will not fully track market price movements. Because of the location and limited local demand for naturalliquids Wet gas in E.G., we consider the prices under the contracts withis sold to Alba Plant LLC EGHoldingsat a fixed-price term contract resulting in realized prices not tracking market price. Alba Plant LLC extracts and AMPCO to be comparable to the price that could be realized from transactions with unrelated parties in this market under the same or similar circumstances. EGHoldings and AMPCO process the gas into LNG and methanol,keeps NGLs, which are sold at market prices,price, with our share of their income/lossincome from Alba Plant LLC being reflected in the income from equity method investments line item on the Consolidated Statementsconsolidated statements of Income. Although uncommon, any dryincome.

Natural gas not sold is returned offshore and re-injected intoDry natural gas, processed by Alba Plant LLC on behalf of the Alba field for later production.Field, is sold by the Alba Field to EG LNG and AMPCO at fixed-price long term contracts resulting in realized prices not tracking market price. We derive additional value from the equity investment in our downstream gas processing units EG LNG and AMPCO. EG LNG sells LNG on a market-based long term contract and AMPCO markets methanol at market prices.


Consolidated Results of Operations: 20172019 compared to 20162018
Sales and other operating revenues, including related partyRevenues from contracts with customers are summarizedpresented by segment in the following table:table below:
 Year Ended December 31,
(In millions)20172016
Sales and other operating revenues, including related party  
United States E&P$3,138
$2,375
International E&P1,154
665
Segment sales and other operating revenues, including related party4,292
3,040
Unrealized gain (loss) on commodity derivative instruments(81)(110)
Sales and other operating revenues, including related party$4,211
$2,930
 Year Ended December 31,
(In millions)2019 2018
Revenues from contracts with customers   
United States$4,602
 $4,886
International461
 1,016
Segment revenues from contracts with customers$5,063
 $5,902

Below is a price/volume analysis for each segment. Refer to the preceding Operations and Market Conditions sections for additional detail related to our net sales volumes and average price realizations.
 Year Ended December 31, Increase (Decrease) Related to Year Ended December 31,   Increase (Decrease) Related to  
(In millions) 2016 Price Realizations Net Sales Volumes 2017 Year Ended December 31, 2018 Price Realizations Net Sales Volumes Year Ended December 31, 2019
United States E&P Price-Volume Analysis (a)
Liquid hydrocarbons $2,041
 $619
 $66
 $2,726
Natural gas 274
 58
 29
 361
Realized gain on commodity        
derivative instruments 44
 

   45
Other sales 16
     6
Total $2,375
     $3,138
International E&P Price-Volume Analysis
Liquid hydrocarbons $546
 $264
 $205
 $1,015
United States Price/Volume AnalysisUnited States Price/Volume Analysis
Crude oil and condensate $3,947
 $(510) $450
 $3,887
Natural gas liquids 495
 (223) 35
 307
Natural gas 87
 4
 6
 97
 413
 (75) 11
 349
Other sales 32
     42
 31
     59
Total $665
     $1,154
 $4,886
     $4,602
International Price/Volume AnalysisInternational Price/Volume Analysis
Crude oil and condensate $888
 $(83) $(407) $398
Natural gas liquids 9
 (3) (1) 5
Natural gas 86
 (29) (13) 44
Other sales 33
     14
Total $1,016
     $461
(a) Year ended December 31, 2016 includes sales volumes of 14 mboedNet loss on an annualized basis relating to assets sold when compared to 2017, primarily consisting of the disposition of Wyoming and certain non-operated CO2 and waterflood assets in West Texas and New Mexico in 2016.
Marketing revenues decreased $78commodity derivatives increased $58 million in 20172019 from 2016, primarily2018. We have multiple crude oil and natural gas derivative contracts indexed to NYMEX WTI and Henry Hub. We record commodity derivative gains/losses as the respective index pricing and forward curves change each period. See Note 15 to the consolidated financial statements for further information.
Income from equity method investments decreased $138 million as a result of lower marketed volumes in the United States E&P segment due to non-core asset dispositions. Marketing activities include the purchase of commodities from third parties for resale and serve to aggregate volumes in order to satisfy transportation commitments as well as to achieve flexibility within product types and delivery points. Since the volume of marketing activity is based on market dynamics, it can fluctuate from period to period.
Income from equity method investments increased $81 million primarily due to higher price realizations from LPG at our Alba plant and methanol at our AMPCO methanol facility. Also contributing to the increase was improvement inlower net sales volumes primarily driven bydue to the completion2019 triennial turnaround in E.G. and natural decline of the Alba field compression projectwhich resulted in E.G. during the second half of 2016.lower net sales volumes for equity method investments.
Net gain on disposal of assetsdecreased $331$269 million in 20172019 from 2016.2018. This decrease was primarily related to the 2018 sale of non-core assets in the first halfour Libya subsidiary for a pre-tax gain of 2016 in Wyoming, West Texas and New Mexico, and the Gulf of Mexico.$255 million. See Item 8. Financial Statements and Supplementary Data - Note 5 to the consolidated financial statements for information about these dispositions.

Other income increased $25decreased $88 million in 20172019 from 2016.2018 primarily due to the 2018 reduction of our U.K. asset retirement obligation, versus the 2019 indemnification of certain tax liabilities in connection with the closure of the 2010-2011 Federal Tax Audit with the IRS. This increase was primarilyindemnity relates to tax and interest allocable to MPC as a result of a downward revisionthe IRS Audit in U.K. estimated asset retirement costs as well as timing of abandonment activities inaccordance with the U.K.Tax Sharing Agreement. See Item 8. Financial Statements and Supplementary Data - Note 118 to the consolidated financial statements for detail about our asset retirement obligation.
Production expensesremained nearly flatdecreased $130 million during 2017 while2019 from 2018. The International segment decreased $89 million primarily due to dispositions, which included the sale of our sales volumes from continuing operations increased. During 2017, ourU.K. business on July 1, 2019. Our United States segment decreased $37 million primarily due to reduced water hauling costs with more water on pipe in the Northern Delaware and non-core asset dispositions in the Gulf of Mexico during 2018, slightly offset by increased water handling in Bakken due to more producing wells in 2019 than in 2018.
The production expense rate (expense per(per boe) for United States E&P was lower primarily due to the disposition of higher cost non-core assets in Wyoming. The International E&P expense rate decreaseddeclined during 2019 in the year of 2017 primarily due to

an increase in sales volumes in E.G. and Libya, combined with lower maintenance costs in E.G.
($ per boe)20172016
Production Expense Rate  
United States E&P
$5.57

$5.96
International E&P
$4.33

$5.05
Marketing expenses decreased $77 million in 2017 from the prior year, consistent with the decrease in marketing revenues discussed above.
Other operating expenses decreased $53 million compared to 2016 which included the termination payment of our Gulf of Mexico deepwater drilling commitment in 2016.
Exploration expenses increased $86 million during 2017 versus the comparable 2016 period, due primarily to charges takenUnited States as a result of lower forecasted long-term commodity pricescontinued focus on cost reduction as well as higher net sales volumes.
The following table provides production expense and the anticipatedproduction expense rates for each segment:
(In millions/$ per boe)20192018Increase (Decrease) 20192018Increase (Decrease)
Production Expense and Production Expense RateExpense Rate
United States$588
$625
(6)% $4.98
$5.75
(13)%
International$126
$215
(41)% $3.76
$4.86
(23)%
Shipping, handling and other operating expenses increased $30 million in 2019 from 2018 primarily as a result of increased sales of certain non-core propertiesvolumes in our United States segment, partially offset by the sale of our U.K. business in the International E&P segment. In 2017, we recorded non-cash charges
 Exploration expenses decreased $140 million during 2019 versus the comparable 2018. Decreases in unproved property impairments were driven by changes in impairment assumptions based on actual development experience. Also in 2018, there was $32 million of $159 million comprised of $95dry well costs and $16 million in unproved property impairments in our International E&P segment and $64 million in dry well costs related to our Diaba License G4-223the Rodo well in Alba Block Sub Area B, offshore E.G. See Item 8. Financial Statements and Supplementary Data - Note 11 to the Republicconsolidated financial statements for details of Gabon. Additionally, our decision not to develop the Tchicuate offshore Block in the Republic of Gabon resulted in an increase to exploration expenses of $43 million during 2017. Unproved property impairments during 2016 primarily consist of non-cash charges related to our decision to not drill our remaining Gulf of Mexico leases.these items.
The following table summarizes the components of exploration expenses:
Year Ended December 31,Year Ended December 31,
(In millions)201720162019 2018 Increase (Decrease)
Exploration Expenses      
Unproved property impairments$246
$195
$98
 $208
 (53)%
Dry well costs77
25
16
 47
 (66)%
Geological and geophysical25
5
18
 21
 (14)%
Other61
98
17
 13
 31 %
Total exploration expenses$409
$323
$149
 $289
 (48)%
Exploration expenses are also discussed in Item 8. Financial Statements and Supplementary Data - Note 10 to the consolidated financial statements.
Depreciation, depletion and amortizationincreased $216decreased $44 million in 20172019 from the prior year2018 primarily as a result of an increasedispositions which included the sale of $176 millionour U.K. business and the sale of certain non-core asset dispositions in theour United States E&P due to a 5% increase in net sales volumes, and an increase in the DD&A rates within our U.S. resource plays. Also contributing to this higher expense was an increase of $52 million in our International E&P segment resulting from increased sales volumes duesegment. Adding to the completion and start-up of ourdecrease were lower 2019 production volumes in E.G. Alba field compression project in mid-2016, and the resumption of sales volumes and production in Libya. Our segments apply the units-of-production method to the majority of their assets, including capitalized asset retirement costs; therefore, volumes have an impact on DD&A expense.
The DD&A rate (expense per(per boe), which is impacted by field-level changes in reserves, capitalized costs and sales volumes, reserves and capitalized costs, can also cause changes toimpact our DD&A. The DD&A rate for United States E&P increased primarily due to the sales volume mix between our U.S. resource plays, and the outside-operated Gunflint field achieving first production in mid-2016. Also contributing to the increase was a reduction to the Eagle Ford proved developed reserve base in the fourth quarter of 2016.expense. The DD&A rate for International E&P remained relatively consistent with the 2016 rate. decreased primarily as a result of dispositions. Our United States DD&A rate decreased in 2019 primarily due to reserve additions as well as non-core asset dispositions in 2018.

The following table provides DD&A expense and DD&A expense rates for each segment.segment:
($ per boe)20172016
DD&A rate  
United States E&P
$23.51

$22.49
International E&P
$6.19

$6.21
(In millions/$ per boe)20192018Increase (Decrease) 20192018
Increase (Decrease)

DD&A Expense and DD&A Expense RateExpense Rate
United States$2,250
$2,217
1 % $19.07
$20.39
(6)%
International$121
$197
(39)% $3.61
$4.44
(19)%
Impairments increased $162decreased $51 million in 20172019 from the comparable 2016 period. This increase was primarily consisting2018 as a result of $136 millionlower anticipated sales of proved property impairments in certain non-core proved properties in our International E&P segment as a result of our anticipated sales and lower forecasted long-term commodity prices. Additionally, includedUnited States segments in proved property impairments was $89 million in 2017 and $67 million in 2016, both relating to lower forecasted commodity prices in conventional properties in Oklahoma and the Gulf of Mexico.

current period. See Item 8. Financial Statements and Supplementary Data - Note 1011 to the consolidated financial statement for additional detail.detail of proved property impairments each year.
Taxes other than incomeincludes production, severance and ad valorem taxes, primarily in the U.S., which tend to increase or decrease in relation to revenue and sales volumes. Taxes other than income increased $32 million in the current year as a result of increased revenue and sales volumes, and due to a reserve being established for non-income tax examinations relating to open tax years. The following table summarizes the components of taxes other than income:
 Year Ended December 31,
(In millions)20172016
Taxes other than income  
Production and severance$121
$91
Ad valorem13
23
Other49
37
Total$183
$151
General and administrative expenses decreased$8138 million in 2017 primarily due to reduced pension settlement charges of $32 million in 20172019 compared to $103 million in 2016.
Net interest and otherdecreased $62 million during 20172018. This was primarily as athe result of the terminationdecreased compensation costs.
Provision (benefit) for income taxes reflects an effective tax benefit rate of our forward starting interest22% for 2019, as compared to an effective income tax expense rate swaps, which resulted in a gain of $47 million. Additionally, during 2017 we reduced total long term debt by approximately $1.75 billion which resulted in a reduction to our net interest and other. The components of net interest and other are detailed in Item 8. Financial Statements and Supplementary Data - Note 15 to the consolidated financial statements.
Loss on early extinguishment of debt increased $51 million in 2017 primarily due to make-whole call provisions of $46 million paid upon the redemption of approximately $1.75 billion in senior unsecured notes.23% for 2018. See Item 8. Financial Statements and Supplementary Data - Note 15 to the consolidated financial statements for further detail.
Provision (benefit) for income taxesreflects an effective tax rate from continuing operations of 83% and 79% for 2017 and 2016. In 2017, our tax expense was primarily a result of our full valuation allowance on our net federal deferred tax assets throughout 2017 and the effects of our foreign operations.
See Item 8. Financial Statements and Supplementary Data - Note 78 to the consolidated financial statements for a discussion of the effective income tax rate.
Discontinued operations are presented net of tax. See Item 8. Financial Statements and Supplementary Data - Note 5 to the consolidated financial statements for financial information concerning our discontinued operations.

Segment Results: 20172019 compared to 20162018
Segment income(loss)Income
Segment income (loss) represents income (loss) from operations excludingwhich excludes certain items not allocated to our operating segments, net of income taxes, attributable to the operating segments.taxes. A portion of our corporate and operations support general and administrative support costs are not allocated to the operating segments. GainsThese unallocated costs primarily consist of employment costs (including pension effects), professional services, facilities and other costs associated with corporate and operations support activities. Additionally, items which affect comparability such as: gains or losses on dispositions, certain property impairments, certain exploration expenses relating to a strategic decision to exit conventional exploration, unrealized gains or losses on commodity derivative instruments, pension settlement losses or other items that affect comparability also(as determined by the CODM) are not allocated to operating segments.
The following table reconciles segment income (loss) to net income (loss):income:
 Year Ended December 31,
(In millions)2017 2016
United States E&P$(148) $(415)
International E&P374
 228
Segment income (loss)226
 (187)
Items not allocated to segments, net of income taxes (a)
(1,056) (1,900)
    Income (loss) from continuing operations(830) (2,087)
    Income (loss) from discontinued operations (b)
(4,893) (53)
         Net income (loss)$(5,723) $(2,140)
(a) See Item 8. Financial Statements and Supplementary Data - Note 6 to the consolidated financial statements for further detail about items not allocated to segments.
(b) We sold our Canadian business in the second quarter of 2017. The Canadian business is reflected as discontinued operations in all periods presented.
 Year Ended December 31,
(In millions)2019 2018 Increase (Decrease)
United States$675
 $608
 11 %
International233
 473
 (51)%
Segment income908
 1,081
 (16)%
Items not allocated to segments, net of income taxes(a)
(428) 15
 (2,953)%
Net income$480
 $1,096
 (56)%
(a)
See Item 8. Financial Statements and Supplementary Data - Note 7 to the consolidated financial statements for further detail about items not allocated to segments.
United States E&P segment loss decreased $267income increased $67 million after-tax in 20172019 compared to 20162018 primarily due to higher price realizations and higher sales volumes. Partially offsetting this revenuea net gain on commodity derivatives in 2019 versus net loss on commodity derivatives in 2018, as well as lower exploration costs. This increase was an increase in DD&A and a decrease in the income tax benefit, as we did not realize a tax benefit on any net federal deferred tax assets generated in 2017 due to the full valuation allowance on net federal deferred tax assets in the prior year.
International E&P segment incomeincreased $146 million in 2017 compared to 2016 primarily due to higher price realizations, and an increase in sales volumes in E.G. and Libya. This was partially offset by an increaselower price realizations along with increases in DD&A and income tax expensecertain expenses as a result of the increasehigher net sales volumes.
 International segment incomedecreased $240 million after-tax in sales volumes.

Consolidated Results of Operations: 20162019 compared to 2015
Sales and other operating revenues, including related partyare summarized by segment in the following table:
 Year Ended December 31,
(In millions)20162015
Sales and other operating revenues, including related party  
United States E&P$2,375
$3,358
International E&P665
728
Segment sales and other operating revenues, including related party3,040
4,086
Unrealized gain on crude oil derivative instruments(110)50
Sales and other operating revenues, including related party$2,930
$4,136
Below is a price/volume analysis for each segment. Refer to the preceding Operations and Market Conditions sections for additional detail related to our net sales volumes and average price realizations.
  Year Ended December 31, Increase (Decrease) Related to Year Ended December 31,
(In millions) 2015 Price Realizations Net Sales Volumes 2016
United States E&P Price-Volume Analysis
Liquid hydrocarbons $2,905
 $(321) $(543) $2,041
Natural gas 341
 (32) (35) 274
Realized gain on crude oil        
    derivative instruments 78
 

   44
Other sales 34
     16
Total $3,358
     $2,375
International E&P Price-Volume Analysis
Liquid hydrocarbons $578
 $(78) $46
 $546
Natural gas 108
 (25) 4
 87
Other sales 42
     32
Total $728
     $665
Marketing revenues decreased $259 million in 2016 from 2015. Marketing activities include the purchase of commodities from third parties for resale and serve to aggregate volumes in order to satisfy transportation commitments as well as to achieve flexibility within product types and delivery points. Since the volume of marketing activity is based on market dynamics, it can fluctuate from period to period. The decreases are primarily related to lower marketed volumes in the United States, which were further compounded by a lower commodity price environment.
Income from equity method investments increased $30 million2018 primarily due to higher net sales volumes in the second half of 2016lower income from our equity method investments and our operations in E.G. as a result of the completion of the Alba field compression project. Additionally, a partial impairment of our investment in an equity method investee in 2015 of $12 million contributed to the increase in the current year.
Net gain on disposal of assets increased $269 million in 2016 from 2015. See Item 8. Financial Statementslower sales volumes and Supplementary Data - Note 5 to the consolidated financial statements for information about these dispositions.
Production expensesdecreased $267 million in 2016 from 2015. United States E&P declined $238 million primarilyprice realizations, offset by lower costs and taxes due to lower operational, maintenance and labor costs, coupled with lower net salesdispositions. Sales volumes resulting from the impact of our non-core asset dispositions and lower activity levels. International E&P declined $29 million largely due to lower operational and maintenance costs as well as a more favorable exchange rate on expenses.
The 2016 production expense rate (expense rate per boe) for United States E&P declined primarily due to cost reductions that occurred at a rate faster than our production decline. The International E&P expense rate decreased in 2016 primarily due to reduced maintenance and project costs in the U.K. and benefited from the favorable exchange rate. The following table provides production expense rates for each segment:

($ per boe)20162015
Production Expense Rate  
United States E&P
$5.96

$7.38
International E&P
$5.05

$5.99
Marketing expenses decreased $255 million in 2016 from the prior year, consistent with the decrease in marketing revenues discussed above.
Other operating expenses increased $74 million primarily as a result of the termination payment of our Gulf of Mexico deepwater drilling commitment.
Exploration expenses decreased$648 millionin 2016 compared to 2015, reflecting our strategic decision to transition out of conventional exploration. In 2016, unproved property impairments primarily consisted of non-cash charges related to our decision to not drill our remaining Gulf of Mexico leases and also included certain other unproved properties in the United States. In 2015, unproved property impairments are due to changes in our conventional exploration strategy (Gulf of Mexico and the Harir block in the Kurdistan Region of Iraq), and the sale of certain properties in the Gulf of Mexico, as well as our unproved property in Colorado.
Dry well costs in 2015 included the operated Solomon exploration well in the Gulf of Mexico and our operated Sodalita West #1 exploratory well in E.G.
The following table summarizes the components of exploration expenses:
 Year Ended December 31,
(In millions)20162015
Exploration Expenses  
Unproved property impairments$195
$655
Dry well costs25
212
Geological and geophysical5
31
Other98
73
Total exploration expenses$323
$971
Exploration expense are also discussed in Item 8. Financial Statements and Supplementary Data - Note 10 to the consolidated financial statements.
Depreciation, depletion and amortization decreased $565 million in 2016 from the prior year primarily as a result of net sales volume decreases in the United States E&P segment, including the impact of non-core asset dispositions, and volume declines due to base declines and lower completion activity. Our segments apply the units-of-production method to the majority of their assets, including capitalized asset retirement costs; therefore, volumes have an impact on DD&A expense.
The DD&A rate (expense per boe), which is impacted by field-level changes in sales volumes, reserves and capitalized costs, can also cause changes to our DD&A. The following table provides DD&A rates for each segment. The DD&A rate for United States E&P decreased primarily due to a higher proved reserve base. The DD&A rate for International E&P declined primarily due to sales volume mix changes in E.G. and the U.K. for 2016.
($ per boe)20162015
DD&A rate  
United States E&P
$22.49

$24.24
International E&P
$6.21

$6.95
Impairments decreased $654 million in 2016 versus 2015. Impairments in 2016 were primarily the result of lower forecasted commodity prices in conventional properties in Oklahoma and the Gulf of Mexico, and were also the result of revisions to estimated abandonment costs. Impairments in 2015 included $340 million for the goodwill impairment of the United States E&P reporting unit, and $335 million related to proved properties (primarily in Colorado and the Gulf of Mexico) as a result of lower forecasted commodity prices, and $44 million associated with our disposition of natural gas assets in East Texas, North Louisiana and Wilburton, Oklahoma.
See Item 8. Financial Statements and Supplementary Data - Note 10 and Note 12 to the consolidated financial statement for additional detail.

Taxes other than incomeincludes production, severance and ad valorem taxes, primarily in the U.S., which tend to increase or decrease in relation to revenue and sales volumes. The decline in revenue and sales volumes during 2016 resulted in a decline of $65 million compared to 2015. The following table summarizes the components of taxes other than income:
 Year Ended December 31,
(In millions)20162015
Taxes other than income  
Production and severance$91
$131
Ad valorem23
39
Other37
46
Total taxes other than income$151
$216
General and administrative expenses decreased$107 million primarily due to cost savings realized from the 2015 workforce reductions including corresponding severance expenses.
Net interest and other increased $46 million primarily due to an increase in interest expense as a result of the increase in long-term debt in the second quarter of 2015. The components of net interest and other are detailed in Item 8. Financial Statements and Supplementary Data - Note 20 to the consolidated financial statements.
Provision (benefit) for income taxesreflects an effective tax rate of 79% and a benefit of 30% for 2016 and 2015. The increase in the 2016 effective tax rate was primarily due to the valuation allowance increaseplanned triennial turnaround in E.G. completed in the first quarter 2019 and natural field decline in E.G. The income decrease was also attributed to dispositions of $1,346 million relatedour U.K. business and our non-operated interest in the Atrush block in Kurdistan.

35


Consolidated Results of Operations: 2018 compared to our U.S. benefits on foreign taxes and other federal deferred taxes.2017
See Item 8. Financial Statements and Supplementary Data - Note 7 to the consolidated financial statements for aA detailed discussion of the effective income tax rate.
Discontinued operations are presented netyear-over-year changes from the year ended December 31, 2018 to December 31, 2017 can be found in the Management’s Discussion and Analysis section of tax. See Item 8. Financial Statements and Supplementary Data - Note 5 toour Annual Report on Form 10-K for the consolidated financial statements for financial information concerning our discontinued operations.year ended December 31, 2018.
Segment Results: 2016 compared to 2015
Segment income (loss)
Segment income (loss) represents income (loss) from operations excluding certain items not allocated to segments, net of income taxes, attributable to the operating segments. A portion of our corporate and operations support general and administrative costs are not allocated to the operating segments. Gains or losses on dispositions, certain impairments, unrealized gains or losses on commodity derivative instruments, pension settlement losses, or other items that affect comparability also are not allocated to operating segments
The following table reconciles segment income (loss) to net income (loss):
 Year Ended December 31,
(In millions)2016 2015
United States E&P$(415) $(452)
International E&P228
 112
Segment income (loss)(187) (340)
Items not allocated to segments, net of income taxes (a) 
(1,900) (1,361)
    Income (loss) from continuing operations(2,087) (1,701)
    Income (loss) from discontinued operations (b)
(53) (503)
         Net income (loss)$(2,140) $(2,204)
(a) See Item 8. Financial Statements and Supplementary Data - Note 6 to the consolidated financial statements for further detail about items not allocated to segments.
(b) We sold our Canadian business in the second quarter of 2017. The Canadian business is reflected as discontinued operations in all periods presented.
 United States E&P segment loss decreased $37 million in 2016 compared to 2015 as a result of lower DD&A expense, production costs, taxes other than income, and exploration expense, with these expense reductions more than offsetting the lower revenues as a result of decreases in both price realizations and net sales volumes.
International E&P segment income increased $116 million in 2016 compared to 2015. The increase was largely due to lower exploration expenses in 2016, as our 2015 expense included costs relating to our transition out of our conventional exploration program. The remainder of the increase was due to lower production costs and DD&A as a result of lower asset retirement costs and sales mix, and an increase in income from equity method investments, partially offset by lower price realizations.

Management’s Discussion and Analysis of Financial Condition, Cash Flows and Liquidity
Commodity prices are the most significant factor impacting our operating cash flows and the amount of capital available to reinvest into the business. In 2017,2019, we experienced an increasea decrease in operating cash flows primarily due to improvements in theas a result of lower commodity price environmentrealizations, of which resulted in an increase to consolidated average liquid hydrocarbonscrude oil and condensate price realizations decreased by over 30%12% to $42.59. Additionally, we closed on the sale of$55.54 per barrel.
During 2019 our Canadian business and other non-core assets resulting in net proceeds of $1.79 billion, which allowed us to be opportunistic with our high quality acquisitions in the Permian basin. Beyond the proceeds the non-core asset sales generated, the portfolio changes enhanced our profitability by disposing of higher unit cost operations and allowing for a more efficient allocation of our Capital Development Program to the higher return opportunities in the U.S. resource plays.
Steps taken in 2017 to continue our operating cash flow growth include the following actions:
Improved cost structure by reducing production expense per boe in 2017.
United States E&P - 7% reduction to $5.57 per boe
International E&P - 14% reduction to $4.33 per boe
Total 2017 net sales volumes from continuing operations increased 10% compared to 2016.
Other 2017 cash flow highlights include:
Divested certain non-core assets resultingWe returned capital to shareholders by executing $345 million of share repurchases along with $162 million in net proceedsdividend payments.
Asset acquisitions during the year of $1.79 billion.
We closed on multiple Permian basin acquisitions for $1.89 billion$293 million were paid with cash on hand.
Through multiple financingCash and cash equivalents decreased $604 million to $858 million at December 31, 2019.
During the fourth quarter, we completed three leverage neutral finance transactions we have reduced total debt by approximately $1.75 billion which will result in a reduction to our futureextend maturities and generate annual interest expense of approximately $115 million.
Expect to receive $750 million in remaining proceeds from the sale of our Canadian business by March 1, 2018.
Expanded the capacity of the revolving credit facility from $3.3 billion to $3.4 billion.cash savings.
At December 31, 2017,2019, we had approximately $4.0$3.9 billion of liquidity consisting of $563$858 million in cash and cash equivalents and $3.4$3.0 billion available under our revolving credit facility. In September 2019, we entered into an amendment to our Credit Facility to reduce the maximum borrowing from $3.4 billion to $3.0 billion and extended the maturity date by one year to May 28, 2023. As previously discussed in ourthe Outlook section, we are targeting a $2.3$2.4 billion Capital Development ProgramBudget for 2018.2020. We believe our current liquidity level, and balance sheet, along with our non-core asset disposition programcash flow from operations and ability to access the capital markets provides us with the flexibility to fund our business throughout the differentacross a wide range of commodity price cycles. We will continue to evaluate the commodity price environment and our spending throughout 2018.environments.

Cash Flows
The following table presents sources and uses of cash and cash equivalents from continuing operations for 2017, 20162019 and 2015:2018:
Year Ended December 31,Year Ended December 31,
(In millions)2017 2016 20152019 2018
Sources of cash and cash equivalents 
  
   
  
Operating activities - continuing operations$1,988
 $901
 $1,537
Disposals of assets, net of cash transferred to the buyer1,787
 1,219
 225
Common stock issuance
 1,236
 
Operating activities$2,749
 $3,234
Disposal of assets, net of cash transferred to the buyer(76) 1,264
Borrowings988
 
 1,996
600
 
Other68
 56
 101
65
 93
Total sources of cash and cash equivalents$4,831
 $3,412
 $3,859
$3,338
 $4,591
Uses of cash and cash equivalents        
Cash additions to property, plant and equipment$(1,974) $(1,204) $(3,485)
Additions to property, plant and equipment$(2,550) $(2,753)
Additions to other assets36
 (26)
Acquisitions, net of cash acquired(1,891) (902) 
(293) (25)
Purchases of common stock(11) (6) (11)(362) (713)
Debt repayments(2,764) (1) (1,069)(600) 
Debt extinguishment costs(46) 
 
Dividends paid(170) (162) (460)(162) (169)
Other(30) (4) (8)(11) (6)
Total uses of cash and cash equivalents$(6,886) $(2,279) $(5,033)$(3,942) $(3,692)
Cash flows generated from operating activities in 20172019 were higher15% lower as commodity prices and price realizations improved compared to 2016. This increasedecreased 13% along with lower net sales volumes in price realizationour International segment as a result of E.G. planned maintenance and natural field decline, coupled with dispositions.


Disposals of assets in 2019 were primarily related to proceeds, net of the cash transferred to the buyer, with the sale of our increased sales volumes and continued focus on cost reductions resultedU.K. business; partially offset by the proceeds received from the sale of a 25% non-operated working interest in an increase to cash flows generated from operating activities.
the Louisiana Austin Chalk as well as the sale of our non-operated interest in the Atrush block in Kurdistan. Proceeds from the disposals of assets for 20172018 are primarily a result ofrelated to our non-operated interest in Libya, as well as the disposal of our Canadian business, andremaining proceeds from disposals of assets in 2016 are primarily from the sale of our Wyoming upstream and midstream assets, as well as the sale of certain other non-operated CO2 and waterflood assets in West Texas and New Mexico. Disposals of assets in 2015 pertain to the sale of certain of our operated and non-operated producing properties in the Gulf of Mexico as well as natural gas assets in East Texas, North Louisiana and Wilburton, Oklahoma.Canadian business. Disposition transactions are discussed in further detail in Item 8. Financial Statements and Supplementary Data – Note 5 to the consolidated financial statements.
Issuance of common stock reflects net proceeds received in March 2016 from our public sale of common stock. See Item 8. Financial Statements and Supplementary Data - Note 22 to the consolidated financial statements for additional information.
Borrowings in 2017 are a result of the issuance of $1 billion of 4.4% senior unsecured notes due in 2027. Our 2015 borrowings reflect net proceeds received from the issuance of senior notes in June 2015. Financing transactions are discussed in further detail in Item 8. Financial Statements and Supplementary Data – Note 15 to the consolidated financial statements for additional information.
Additions to property, plant and equipment reflect a significant usein 2019 totaled $2.6 billion, consistent with expectations (last year, we communicated our $2.6 billion Capital Budget consisted of cash$2.4 billion in development capital and cash equivalents. $200 million to fund resource play exploration.
The following table shows capital expenditures related to continuing operations by segment and reconciles to additions to property, plant and equipment as presented in the consolidated statements of cash flows for 2017, 2016 and 2015:flows:
Year Ended December 31,Year Ended December 31,
(In millions)2017 2016 20152019 2018
United States E&P$2,081
 $936
 $2,553
International E&P42
 82
 368
United States (a)
$2,550
 $2,620
International16
 39
Corporate27
 18
 25
25
 26
Total capital expenditures2,150
 1,036
 2,946
2,591
 2,685
Change in capital expenditure accrual(a)(176) 168
 539
(41) 68
Additions to property, plant and equipment$1,974
 $1,204
 $3,485
Total use of cash and cash equivalents for property, plant and equipment$2,550
 $2,753
(a)
The change in capital expenditure accrual includes activity for assets classified as held for sale for the years presented.
Additions to other assets relates to deposits on our resource play exploration program.
In the fourth quarter 2019, we acquired approximately 18,000 net acres in the Eagle Ford for $191 million and approximately 40,000 acres in a Texas Delaware oil play in West Texas for $106 million.
During 2017,the fourth quarter 2019, we closed on multiple Permian basin acquisitions for approximately $1.9 billion with cash on hand. Additionally, during 2016, we closedcompleted two separate financing transactions resulting in a debt borrowing of $600 million and debt repayment of $600 million, which is further discussed in the Oklahoma STACK acquisition for a purchase price of $902 million, net of cash

acquired;Capital Resources section below. Also see Item 8. Financial Statements and Supplementary Data - Note 417 to the consolidated financial statements for further information concerning acquisitions.
In December 2017, we redeemed $1 billiondetails of 5.125% municipal revenue bonds due in 2037 in a refunding transaction. Additionally, during the third quarter of 2017, we used the net proceeds of the borrowing disclosed above plus existing cash on hand to redeem $1.76 billion in senior unsecured notes resulting in a recognized loss on early extinguishment of debt of $46 million, primarily due to make-whole call provisions. In November 2015, we repaid our $1 billion 0.90% senior notes upon maturity. Financing transactions are discussed in further detail in Item 8. Financial Statements and Supplementary Data – Note 15 to the consolidated financial statements for additional information.these items
During 2017,2019 and 2018, the Board of Directors approved a $0.05 per share quarterly dividend. See Capital Requirements below for additional information about the fourth quarter 2019 dividend. During 2015
Available Liquidity
In September 2019, we announcedentered into an adjustmentamendment to our quarterly dividend starting in third quarter 2015, withCredit Facility to reduce the full-year impact resulting in a decrease of dividends paid in 2017maximum borrowing from $3.4 billion to $3.0 billion and 2016.
Liquidity and Capital Resources
In June 2017, we extended the maturity date of our Credit Facility from May 28, 2020,by one year to May 28, 2021. In July 2017, we increased our $3.3 billion unsecured Credit Facility by $93 million to a total of $3.4 billion. Fees on the unused commitment of each lender, as well as the borrowing options under the Credit Facility, remain unaffected by the increase and term extension. We have the ability to request two additional one-year extensions and an option to increase the commitment amount by up to an additional $107 million, subject to the consent of any increasing lenders.  The sub-facilities for swing-line loans and letters of credit remain unchanged allowing up to an aggregate amount of $100 million and $500 million, respectively.2023.
Our main sources of liquidity are cash and cash equivalents, internally generated cash flow from operations, sales of non-core assets, capital market transactions, and our revolving credit facility.Credit Facility. At December 31, 2017,2019, we had approximately $4.0$3.9 billion of liquidity consisting of $563$858 million in cash and cash equivalents and $3.4$3.0 billion available under our revolving credit facility. During the first quarter of 2018, we expect to receive $750 million in remaining proceeds from the sale of our Canadian business.Credit Facility. Our working capital requirements are supported by these sources and we may issue either commercial paper backed by our revolving Credit Facility or draw on our revolving credit facility to meet short-term cash requirements, or issue debt or equity securities through the shelf registration statement discussed below as part of our longer-term liquidity and capital management program. Because of the alternatives available to us as discussed above, we believe that our short-term and long-term liquidity are adequate to fund not only our current operations, but also our near-term and long-term funding requirements including our capital spending programs, dividend payments, defined benefit plan contributions, repayment of debt maturities, and other amounts that may ultimately be paid in connection with contingencies.
General economic conditions, commodity prices, and financial, business and other factors could affect our operations and our ability to access the capital markets. Our corporate credit ratings as of December 31, 20172019 are: Standard & Poor'sPoor’s Ratings Services BBB-BBB (stable); Fitch Ratings BBB (stable); and Moody'sMoody’s Investor Services, Inc. Ba1Baa3 (stable). We are rated investment grade at all three primary credit rating agencies. In addition, we also have the ability to borrow on our U.S. commercial paper program, which is backed by the revolving credit facility. A downgrade in our credit ratings could increase our future cost of financing or limit our ability to access capital, and result in additional collateral requirements. See Item 1A. Risk Factors for a discussion of how a downgrade in our credit ratings could affect us.
In December of 2017, we redeemed $1 billion of 5.125% municipal revenue bonds due in 2037 in a refunding transaction that preserved our ability to remarket up to $1 billion of tax-exempt municipal bonds prior to 2037.
We may incur additional debt in order to fund our capital expenditures, acquisitions or development activities, or for general corporate or other purposes. A higher level of indebtedness could increase the risk that our liquidity and financial flexibility deteriorates. See Item 1A. Risk Factors for a further discussion of how our level of indebtedness could affect us.
Capital Resources
Credit Arrangements and Borrowings
At December 31, 2017,2019, we had no borrowings against our revolving credit facility.Credit Facility or under our U.S. commercial paper program that is backed by the Credit Facility.
At December 31, 2017,2019, we had $5.5 billion in long-term debt outstanding, with our next debt maturity in the amount of $600 million due in 2020.
outstanding. We do not have any triggers on any of our corporate debt that would cause an event of default in the case of a downgrade of our credit ratings.
On October 1, 2019, we closed a $600 million remarketing to investors of sub-series A bonds which are part of the $1.0 billion St. John the Baptist, State of Louisiana revenue refunding bonds originally issued and purchased in December 2017. The $600 million in proceeds from the conversion and remarketing were used to pay the purchase price of our converted 2017 bonds on the closing date. We continue to own the remaining $400 million of the revenue refunding bonds and have the right to convert and remarket them to investors at any time up to the 2037 maturity date.
On October 3, 2019, we redeemed our $600 million 2.7% senior unsecured notes due June 2020. Our next debt maturity is the $1.0 billion 2.8% senior unsecured notes due 2022.
Shelf Registration
We have a universal shelf registration statement filed with the SEC under which we, as a "well-known“well-known seasoned issuer"issuer” for purposes of SEC rules, have the ability to issue and sell an indeterminate amount of various types of debt and equity securities.

Asset Disposals
We closed on $1.8 billion of non-core asset sales during 2017, with the largest transaction being the disposal of our Canadian business. DuringIn the third quarter of 2017,2019, we entered into separate agreements to sell certain non-core properties inclosed on the sale of our International E&P segmentU.K. business for combined proceeds of $53approximately $95 million, reflecting the assumption by the buyer of working capital and cash equivalent balances, asset retirement obligations of $966 million, as well as the pension obligations.
In the second quarter of 2019, we closed on the sale of our 15% non-operated interest in the Atrush block in Kurdistan for proceeds of $63 million, before closing adjustments. We have closed on one of these agreementsDisposition transactions are discussed in 2017, and we expect the remainder of the agreements to close during 2018.
Seefurther detail in Item 8. Financial Statements and Supplementary Data – Note 5 to the consolidated financial statements for additional discussion of these dispositions.    statements.
Debt-To-Capital Ratio
The Credit Facility includes a covenant requiring that our ratio of total debt to total capitalization not exceed 65% as of the last day of each fiscal quarter. Our debt-to-capital ratio was 32%31% at both December 31, 20172019 and 29% at December 31, 2016.
(Dollars in millions)2017 2016
Long-term debt due within one year$
 $686
Long-term debt5,494
 6,581
Total debt$5,494
 $7,267
Equity$11,708
 $17,541
Calculation   
Total debt$5,494
 $7,267
 Total debt plus equity (total capitalization)$17,202

$24,808
Debt-to-capital ratio32% 29%
2018.
Capital Requirements
Capital Spending
Our approved Capital Development ProgramBudget for 20182020 is $2.3$2.4 billion. Additional details were previously discussed in Outlook.Outlook.
Share Repurchase Program
TheIn 2019, we acquired approximately 24 million common shares at a cost of $345 million under our share repurchase program with remaining share repurchase authorization as of December 31, 2017 is $1.52019 of $1.4 billion.
Other Expected Cash Outflows
On January 30, 2018,29, 2020, our Board of Directors approved a dividend of $0.05 per share for the fourth quarter of 2017.2019. The dividend is payable on March 12, 201810, 2020 to shareholders onof record on February 21, 2018.19, 2020.
We plan to make contributions of up to $65$28 million to our funded pension plans during 2018.2020. Cash contributions to be paid from our general assets for the unfunded pension and postretirement plans are expected to be approximately $6 million and $21$18 million in 2018.2020.

Contractual Cash Obligations
The table below provides aggregated information on our consolidated obligations to make future payments under existing contracts as of December 31, 2017.2019.
(In millions)Total 2018 
2019-
2020
 
2021-
2022
 
Later
Years
Total 2020 
2021-
2022
 
2023-
2024
 
Later
Years
Short and long-term debt (includes interest)(a)
$8,776
 $256
 $1,103
 $1,512
 $5,905
$8,320
 $252
 $1,538
 $1,016
 $5,514
Lease obligations(b)119
 29
 55
 31
 4
276
 114
 98
 6
 58
Purchase obligations:                  
Oil and gas activities(b)(c)
108
 94
 8
 4
 2
52
 42
 2
 1
 7
Service and materials contracts(c)(d)
115
 65
 48
 2
 
126
 69
 54
 3
 
Transportation and related contracts1,581
 313
 483
 241
 544
1,872
 225
 520
 476
 651
Drilling rigs and fracturing crews(d)
21
 21
 
 
 
Other42
 13
 24
 5
 
Other (e)
33
 29
 4
 
 
Total purchase obligations1,867
 506
 563
 252
 546
2,083
 365
 580
 480
 658
Other long-term liabilities reported in the consolidated balance sheet(e)
486
 141
 77
 63
 205
Total contractual cash obligations(f)
$11,248
 $932
 $1,798
 $1,858
 $6,660
Other long-term liabilities reported in the consolidated balance sheet(f)
410
 32
 52
 48
 278
Total contractual cash obligations(g)
$11,089
 $763
 $2,268
 $1,550
 $6,508
(a) 
Includes anticipated cash payments for interest of $256$252 million for 2018,2020, $503 million for 2019-2020, $4772021-2022, $415 million for 2021-20222023-2024 and $2,003 million$1.6 billion for the remaining years for a total of $3,239 million.$2.8 billion.
(b) 
Includes project costs incurred as of December 31, 2019 for new build-to-suit office building in Houston, Texas. See Item 8. Financial Statements and Supplementary Data – Note 13 to the consolidated financial statements and Off-Balance Sheet Arrangements section below.
(c)
Oil and gas activities include contracts to acquire property, plant and equipment and commitments for oil and gas exploration such as costs related to contractually obligated exploratory work programs that are expensed immediately.
(c)(d) 
Service and materials contracts include contracts to purchase services such as utilities, supplies and various other maintenance and operating services.
(d)(e) 
Some contracts may be canceled at an amount less than the contract amount. Were we to electIncludes any drilling rigs and fracturing crews that option where possible at December 31, 2017 our minimum commitment would be $14 million.are not considered lease obligations.
(e)(f) 
Primarily includes obligations for pension and other postretirement benefits including medical and life insurance. We have estimated projected funding requirements through 2027. Although unrecognized tax benefits are not a contractual obligation, they are presented in this table because they represent potential demands on our liquidity.
(f)(g) 
This table does not include the estimated discounted liability for dismantlement, abandonment and restoration costs of oil and gas properties of $1,483$254 million. See Item 8. Financial Statements and Supplementary Data – Note 1112 to the consolidated financial statements.

Transactions with Related Parties
We own a 63% working interest in the Alba field offshore E.G. Onshore E.G., we own a 52% interest in an LPG processing plant, a 60% interest in an LNG production facility and a 45% interest in a methanol production plant, each through equity method investees. We sell our natural gas from the Alba field to these equity method investees as the feedstock for their production processes.
Off-Balance Sheet Arrangements
Off-balance sheet arrangements comprise those arrangements that may potentially impact our liquidity, capital resources and results of operations, even though such arrangements are not recorded as liabilities under accounting principles generally accepted in the U.S. Although off-balance sheet arrangements serve a variety of our business purposes, we are not dependent on these arrangements to maintain our liquidity and capital resources, and we are not aware of any circumstances that are reasonably likely to cause the off-balance sheet arrangements to have a material adverse effect on liquidity and capital resources.
We will issue stand-alone letters of credit when required by a business partner. Such letters of credit outstanding at December 31, 2019, 2018 and 2017 2016 and 2015 aggregated $89$14 million, $166$52 million and $53$89 million. Most of the letters of credit are in support of obligations recorded in the consolidated balance sheet. For example, they are issued to counterpartiesIn 2019, our letters of credit outstanding decreased as a result of our upgraded credit rating and the sale of our U.K. business (we no longer have requirements to support firm transportation agreements and future abandonment liabilities.liabilities).
In 2018, we signed an agreement with an owner/lessor to construct and lease a new build-to-suit office building in Houston, Texas. The new Houston office location is expected to be completed in 2021. The lessor and other participants are providing financing for up to $380 million, to fund the estimated project costs. As of December 31, 2019 project costs incurred totaled $58 million, primarily for land acquisition and initial design costs. The initial lease term is five years and will commence once construction is substantially complete and the new Houston office is ready for occupancy. At the end of the initial lease term, we can extend the term of the lease for an additional five years, subject to the approval of the

participants; purchase the property subject to certain terms and conditions; or remarket the property to an unrelated third party. The lease contains a residual value guarantee of approximately 89% of the total acquisition and construction costs. See Item 8. Financial Statements and Supplementary Data – Note 13 to the consolidated financial statements for further information on leases.

Management’s Discussion and Analysis of Environmental Matters, Litigation and Contingencies
We have incurred and maywill continue to incur substantial capital, operating and maintenance, and remediation expenditures as a result of environmental laws and regulations. If these expenditures, as with all costs, are not ultimately reflected inoffset by the prices of our products and services, our operating results will be adversely affected. We believe that substantially all of our competitors must comply with similar environmental laws and regulations. However, the specific impact on each competitor may vary depending on a number of factors, including the age and location of its operating facilities, marketing areas and production processes. These laws generally provide for control of pollutants released into the environment and require responsible parties to undertake remediation of hazardous waste disposal sites. Penalties may be imposed for noncompliance.
We accrue for environmental remediation activities when the responsibility to remediate is probable and the amount of associated costs can be reasonably estimated. As environmental remediation matters proceed toward ultimate resolution or as additional remediation obligations arise, charges in excess of those previously accrued may be required.
New or expanded environmental requirements, which could increase our environmental costs, may arise in the future.future on both state and federal levels. We strive to comply with all legal requirements regarding the environment, but as not all costs are fixed or presently determinable (even under existing legislation) and may be affected by future legislation or regulations, it is not possible to predict all of the ultimate costs of compliance, including remediation costs that may be incurred and penalties that may be imposed.
For more information on environmental regulations that impact us, or could impact us, see Item 1. Business – Environmental, Health and Safety Matters, Item 1A. Risk Factors and Item 3. Legal Proceedings.Proceedings.
Critical Accounting Estimates
The preparation of financial statements in accordance with accounting principles generally accepted in the U.S. requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements and the reported amounts of revenues and expenses during the respective reporting periods. Accounting estimates are considered to be critical if (1) the nature of the estimates and assumptions is material due to the levels of subjectivity and judgment necessary to account for highly uncertain matters or the susceptibility of such matters to change, and (2) the impact of the estimates and assumptions on financial condition or operating performance is material. Actual results could differ from the estimates and assumptions used.
Estimated Quantities of Net Reserves
We use the successful efforts method of accounting for our oil and gas producing activities. The successful efforts method inherently relies on the estimation of proved crude oil and condensate, NGLs and natural gas reserves. The amount of estimated proved reserve volumes affect, among other things, whether certain costs are capitalized or expensed, the amount and timing of costs depreciated, depleted or amortized into net income and the presentation of supplemental information on oil and gas producing activities. In addition, the expected future cash flows to be generated by producing properties are used for testing impairment and the expected future taxable income available to realize deferred tax assets, also in part, rely on estimates of quantities of net reserves. Refer to the applicable sections below for further discussion of these accounting estimates.

The estimation of quantities of net reserves is a highly technical process performed by our petroleum engineers and geoscientists for crude oil and condensate, NGLs and natural gas, which is based upon several underlying assumptions. The reserve estimates may change as additional information becomes available and as contractual, operational, economic and political conditions change. We evaluate our reserves using drilling results, reservoir performance, seismic interpretation and future plans to develop acreage. Technologies used in proved reserves estimation includes statistical analysis of production performance, decline curve analysis, pressure and rate transient analysis, pressure gradient analysis, reservoir simulation and volumetric analysis. The observed statistical nature of production performance coupled with highly certain reservoir continuity or quality within the reliable technology areas and sufficient proved developed locations establish the reasonable certainty criteria required for booking proved reserves. The data for a given reservoir may also change over time as a result of numerous factors including, but not limited to, additional development activity and future development costs, production history and continual reassessment of the viability of future production volumes under varying economic conditions.


Reserve estimates are based on an unweighted arithmetic average of commodity prices during the 12-month period, using the closing prices on the first day of each month, as defined by the SEC. The table below provides the 20172019 SEC pricing for certain benchmark prices:
SEC Pricing 20172019 SEC Pricing
WTI Crude oil (per bbl)$51.34
$55.69
Henry Hub natural gas (per mmbtu)$2.98
$2.58
Brent crude oil (per bbl)$54.39
$63.15
Mont Belvieu NGLs (per bbl)$22.03
$18.41
When determining the December 31, 20172019 proved reserves for each property, the benchmark prices listed above were adjusted using price differentials that account for property-specific quality and location differences.
Estimates ofIf crude oil prices in the future cash flows associated with proved reserves are based on actual costs of developing and producingaverage below prices used to determine proved reserves at December 31, 2019, it could have an adverse effect on our estimates of proved reserve volumes and the endvalue of the year. If commodity prices were to decrease by approximately 10%, below average prices usedour business. Future reserve revisions could also result from changes in capital funding, drilling plans and governmental regulation, among other things. It is difficult to estimate 2017the magnitude of any potential price change and the effect on proved reserves, (see table above), we would not expectdue to numerous factors (including future crude oil price related reserve revisions to have a material impact on proved reserve volumes.and performance revisions). For further discussion of risks associated with our estimation of proved reserves, see Part I. Item 1A1A. Risk Factors.Factors.
Depreciation and depletion of crude oil and condensate, NGLs and natural gas producing properties is determined by the units-of-production method and could change with revisions to estimated proved reserves. While revisions of previous reserve estimates have not historically been significant to the depreciation and depletion rates of our segments, any reduction in proved reserves, could result in an acceleration of future DD&A expense. The following table illustrates, on average, the sensitivity of each segment'ssegment’s units-of-production DD&A per boe and pretax income to a hypothetical 10% change in 20172019 proved reserves based on 20172019 production.
 Impact of a 10% Increase in Proved Reserves Impact of a 10% Decrease in Proved Reserves
(In millions, except per boe)DD&A per boe Pretax Income DD&A per boe Pretax Income
United States E&P$(2.14) $183
 $2.61
 $(224)
International E&P$(0.56) $30
 $0.69
 $(36)
 Impact of a 10% Increase in Proved Reserves Impact of a 10% Decrease in Proved Reserves
(In millions, except per boe)DD&A per boe Pretax Income DD&A per boe Pretax Income
United States$(1.73) $205
 $2.12
 $(250)
International$(0.33) $11
 $0.40
 $(13)
Asset Retirement Obligations
We have material legal, regulatory and contractual obligations to remove and dismantle long-lived assets and to restore land or seabed at the end of oil and gas production operations. A liability equal to the fair value of such obligations and a corresponding capitalized asset retirement cost are recognized on the balance sheet in the period in which the legal obligation is incurred and a reasonable estimate of fair value can be made. The capitalized asset retirement cost is depreciated using the units-of-production method or the straight line method (dependent on the underlying asset) and the discounted liability is accreted over the period until the obligation is satisfied, the impacts of which are recognized as DD&A in the consolidated statements of income. In many cases, the satisfaction and subsequent discharge of these liabilities is projected to occur many years, or even decades, into the future. Furthermore, the legal, regulatory and contractual requirements often do not provide specific guidance regarding removal practices and the criteria that must be fulfilled when the removal and/or restoration event actually occurs.
Estimates of retirement costs are developed for each property based on numerous factors, such as the scope of the dismantlement, timing of settlement, interpretation of legal, regulatory and contractual requirements, type of production and processing structures, depth of water (if applicable), reservoir characteristics, depth of the reservoir, market demand for equipment, currently available dismantlement and restoration procedures and consultations with construction and engineering professionals. Inflation rates and credit-adjusted-risk-free interest rates are then applied to estimate the fair values of the obligations. To the extent these or other assumptions change after initial recognition of the liability, the fair value estimate is revised and the recognized liability adjusted, with a corresponding adjustment made to the related asset balance or income statement, as appropriate. Changes in estimated asset retirement obligations for late life assets could result in future impairment charges or in the recognition of income. See Item 8. Financial Statements and Supplementary Data – Note 11 to the consolidated financial statements for disclosures regarding our asset retirement obligation estimates.
An estimate of the sensitivity to net income if other assumptions had been used in recording these liabilities is not practical because of the number of obligations that must be assessed, the number of underlying assumptions and the wide range of possible assumptions.

Fair Value Estimates
Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. There are three approaches for measuring the fair value of assets and liabilities: the market approach, the income approach and the cost approach, each of which includes multiple valuation techniques. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities. The income approach uses valuation techniques to measure fair value by converting future amounts, such as cash flows or earnings, into a single present value, or range of present values, using current market expectations about those future amounts. The cost approach is based on the amount that would currently be required to replace the service capacity of an asset. This is often referred to as current replacement cost. The cost approach assumes that the fair value would not exceed what it would cost a market participant to acquire or construct a substitute asset of comparable utility, adjusted for obsolescence.
The fair value accounting standards do not prescribe which valuation technique should be used when measuring fair value and do not prioritize among the techniques. These standards establish a fair value hierarchy that prioritizes the inputs used in applying the various valuation techniques. Inputs broadly refer to the assumptions that market participants use to make pricing decisions, including assumptions about risk. Level 1 inputs are given the highest priority in the fair value hierarchy while Level 3 inputs are given the lowest priority. The three levels of the fair value hierarchy are as follows:
Level 1 – Observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in active markets as of the measurement date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis.
Level 2 – Observable market-based inputs or unobservable inputs that are corroborated by market data. These are inputs other than quoted prices in active markets included in Level 1, which are either directly or indirectly observable as of the measurement date.
Level 3 – Unobservable inputs that are not corroborated by market data and may be used with internally developed methodologies that result in management’s best estimate of fair value.

Valuation techniques that maximize the use of observable inputs are favored. Assets and liabilities are classified in their entirety based on the lowest priority level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the placement of assets and liabilities within the levels of the fair value hierarchy. See Item 8. Financial Statements and Supplementary Data – Note 1416 to the consolidated financial statements for disclosures regarding our fair value measurements.
Significant uses of fair value measurements include:
assets and liabilities acquired in a business combination;
assets acquired in an asset acquisition;
impairment assessments of long-lived assets;
impairment assessments of goodwill;
recorded value of derivative instruments; and
recorded value of derivative instruments.pension plan assets.
The need to test long-lived assets and goodwill for impairment can be based on several indicators, including a significant reduction in prices of crude oil and condensate, NGLs and natural gas, sustained declines in our common stock, reductions to our Capital Development Program,Budget, unfavorable adjustments to reserves, significant changes in the expected timing of production, other changes to contracts or changes in the regulatory environment in which the property is located.
Impairment Assessments of Long-Lived Assets
Long-lived assets in use are assessed for impairment whenever changes in facts and circumstances indicate that the carrying value of the assets may not be recoverable. For purposes of an impairment evaluation, long-lived assets must be grouped at the lowest level for which independent cash flows can be identified, which generally is field-by-field or, in certain instances, by logical grouping of assets if there is significant shared infrastructure or contractual terms that cause economic interdependency amongst separate, discrete fields. If the sum of the undiscounted estimated cash flows from the use of the asset group and its eventual disposition is less than the carrying value of an asset group, the carrying value is written down to the estimated fair value. During 2017 lower forecasted long-term commodity prices and the2019, proved property impairments were primarily as a result of anticipated sales offor certain non-core proved properties in our International E&PUnited States segment triggered an assessment of certainand the sale of our long-lived assets related to oil and gas producing properties for impairment.non-operated interest in the Atrush block (Kurdistan) in our International segment. We estimated the fair values using an income anda market approach, based upon anticipated sales proceeds less costs to sell, and recognized impairments. As of December 31, 2017 our estimated undiscounted cash flows relating to our remaining long-lived assets significantly exceeded their carrying values. Long-lived assets most at risk for future impairment had estimated undiscounted cash flows that exceeded their $66 million carrying value by $22 million. See Item 8. Financial Statements and Supplementary Data Note 10 and Note 14 to the consolidated financial statements for discussion of impairments recorded in 2017, 2016 and 2015 and the related fair value measurements.

Fair value calculated for the purpose of testing our long-lived assets for impairment is estimated using the present value of expected future cash flows method and comparative market prices when appropriate. Significant judgment is involved in performing these fair value estimates since the results are based on forecasted assumptions. Significant assumptions include:
Future crude oil and condensate, NGLs and natural gas prices. Our estimates of future prices are based on our analysis of market supply and demand and consideration of market price indicators. Although these commodity prices may experience extreme volatility in any given year, we believe long-term industry prices are driven by global market supply and demand. To estimate supply, we consider numerous factors, including the worldwide resource base, depletion rates and OPEC production policies. We believe demand is largely driven by global economic factors, such as population and income growth, governmental policies and vehicle stocks. The prices we use in our fair value estimates are consistent with those used in our planning and capital investment reviews. There has been significant volatility in crude oil and condensate, NGLs and natural gas prices and estimates of such future prices are inherently imprecise. See Item 1A. Risk Factors for further discussion on commodity prices.
Estimated quantities of crude oil and condensate, NGLs and natural gas. Such quantities are based on a combination of proved reserves and risk-weighted probable reserves and resources such that the combined volumes represent the most likely expectation of recovery. See Item 1A. Risk Factors for further discussion on reserves.
Expected timing of production. Production forecasts are the outcome of engineering studies which estimate reserves, as well as expected capital programs. The actual timing of the production could be different than the projection. Cash flows realized later in the projection period are less valuable than those realized earlier due to the time value of money. The expected timing of production that we use in our fair value estimates is consistent with that used in our planning and capital investment reviews.
Discount rate commensurate with the risks involved. We apply a discount rate to our expected cash flows based on a variety of factors, including market and economic conditions, operational risk, regulatory risk and political risk. A higher discount rate decreases the net present value of cash flows.
Future capital requirements. Our estimates of future capital requirements are based upon a combination of authorized spending and internal forecasts.
Future crude oil and condensate, NGLs and natural gas prices. Our estimates of future prices are based on our analysis of market supply and demand and consideration of market price indicators. Although these commodity prices may experience extreme volatility in any given year, we believe long-term industry prices are driven by global market supply and demand. To estimate supply, we consider numerous factors, including the worldwide resource base, depletion rates and OPEC production policies. We believe demand is largely driven by global economic factors, such as population and income growth, governmental policies and vehicle stocks. The prices we use in our fair value estimates are consistent with those used in our planning and capital investment reviews. There has been significant volatility in crude oil and condensate, NGLs and natural gas prices and estimates of such future prices are inherently imprecise. See Item 1A. Risk Factors for further discussion on commodity prices.

Estimated quantities of crude oil and condensate, NGLs and natural gas. Such quantities are based on a combination of proved reserves and risk-weighted probable reserves and resources such that the combined volumes represent the most likely expectation of recovery. See Item 1A. Risk Factors for further discussion on reserves.
Expected timing of production. Production forecasts are the outcome of engineering studies which estimate reserves, as well as expected capital development programs. The actual timing of the production could be different than the projection. Cash flows realized later in the projection period are less valuable than those realized earlier due to the time value of money. The expected timing of production that we use in our fair value estimates is consistent with that used in our planning and capital investment reviews.
Discount rate commensurate with the risks involved. We apply a discount rate to our expected cash flows based on a variety of factors, including market and economic conditions, operational risk, regulatory risk and political risk. A higher discount rate decreases the net present value of cash flows.
Future capital requirements. Our estimates of future capital requirements are based upon a combination of authorized spending and internal forecasts.
We base our fair value estimates on projected financial information which we believe to be reasonably likely to occur. An estimate of the sensitivity to changes in assumptions in our undiscounted cash flow calculations is not practicable, given the numerous assumptions (e.g. reserves, pace and timing of development plans, commodity prices, capital expenditures, operating costs, drilling and development costs, inflation and discount rates) that can materially affect our estimates. Unfavorable adjustments to some of the above listed assumptions would likely be offset by favorable adjustments in other assumptions. For example, the impact of sustained reduced commodity prices on future undiscounted cash flows would likely be partially offset by lower costs. As of December 31, 2019 our estimated undiscounted cash flows relating to our remaining long-lived assets significantly exceeded their carrying values. See Item 8. Financial Statements and Supplementary Data Note 11 and Note 16 to the consolidated financial statements for discussion of impairments recorded in 2019, 2018 and 2017 and the related fair value measurements.
Impairment Assessments of Goodwill
Goodwill is tested for impairment on an annual basis, or between annual tests when events or changes in circumstances indicate the fair value of a reporting unit with goodwill may have been reduced below its carrying value. Goodwill is tested for impairment at the reporting unit level. Our reporting units are the same as our reporting segments, of which only International E&P includes goodwill. We performed our annual impairment test in the second quarter of 2017 for the International E&P reporting unit and no impairment was required. As of the dateDecember 31, 2019, our consolidated balance sheet included goodwill of our last goodwill impairment assessment, our International E&P reporting unit fair value exceeded its book value by over 40%.
We estimate the fair values of our International E&P reporting unit using a combination of market and income approaches.$95 million. Determining the fair value of a reporting unit requires judgment and the use of significant estimates and assumptions. Our policy is to first assess the qualitative factors in order to determine whether the fair value of our International reporting unit is more likely than not less than its carrying amount. Certain qualitative factors used in our evaluation include, among other things, the results of the most recent quantitative assessment of the goodwill impairment test; macroeconomic conditions; industry and market conditions (including commodity prices and cost factors); overall financial performance; and other relevant entity-specific events. If, after considering these events and circumstances we determined that it is more likely than not that the fair value of the International reporting unit is less than its carrying amount, a quantitative goodwill test is performed. The quantitative goodwill test is performed using a combination of market and income approaches. The market approach referencedreferences observable inputs specific to us and our industry, such as the price of our common equity, our enterprise value, and valuation multiples of us and our peers from the investor analyst community. The income approach utilizes discounted cash flows, which are based on forecasted assumptions. Key assumptions to the income approach are the same as those described above regarding our impairment assessment of long lived assets and are consistent with those that management uses to make business decisions.
During the second quarter of 2019, we performed our annual impairment test of goodwill using the qualitative assessment. Our qualitative assessment considered the significant excess fair value over carrying value in our most recent step 1 test (second quarter of 2017) and noted a general improvement in the qualitative factors above. After assessing the totality of the qualitative factors which could have a positive or negative impact on goodwill, our assessment did not indicate that it is more likely than not that the fair value is less than its carrying value. As a result, we concluded that no impairment to goodwill was required for our International reporting unit. We believe the estimates and assumptions used in our impairment assessments are reasonable and based on available market information, but variations in such assumptions could result in materially different calculations of fair value and determinations of whether or not an impairment is indicated. See Item Item��8. Financial Statements and Supplementary Data Note 1214 to the consolidated financial statements for additional discussion of goodwill.
Derivatives
We record all derivative instruments at fair value. Fair value measurements for all our derivative instruments are based on observable market-based inputs that are corroborated by market data and are discussed in Item 8. Financial Statements and Supplementary Data – Note 1315 to the consolidated financial statements. Additional information about derivatives and their valuation may be found in Item 7A. Quantitative and Qualitative Disclosures About Market Risk.Risk.

Pension Plan Assets
Pension plan assets are measured at fair value. See Item 8. Financial Statements and Supplementary Data – Note 19 to the consolidated financial statements for discussion of the fair value of plan assets and the presentation of the fair value of our defined benefit pension plan’s assets by level within the fair value hierarchy as of December 31, 2019 and 2018.
Income Taxes
We are subject to income taxes in numerous taxing jurisdictions worldwide. Estimates of income taxes to be recorded involve interpretation of complex tax laws and assessment of the effects of foreign taxes on our U.S. federal income taxes.
Uncertainty exists regarding tax positions taken in previously filed tax returns which remain subject to examination, along with positions expected to be taken in future returns. We provide for unrecognized tax benefits, based on the technical merits, when it is more likely than not that an uncertain tax position will not be sustained upon examination. Adjustments are made to

the uncertain tax positions when facts and circumstances change, such as the closing of a tax audit; court proceedings; changes in applicable tax laws, including tax case rulings and legislative guidance; or expiration of the applicable statute of limitations.
On December 22, 2017, the United States enacted the Tax Cuts and Jobs Act ("Tax Reform Legislation"), which made significant changes to U.S. federal income tax law. We expect that certain aspects of the Tax Reform Legislation will positively impact our future after-tax earnings in the U.S., primarily due to the lower federal statutory tax rate. The Tax Reform Legislation is a comprehensive bill containing several other provisions, such as limitations on the deductibility of interest expense and certain executive compensation, that are not expected to have a material effect on our results. The ultimate impact of the Tax Reform Legislation may differ from our estimates due to changes in interpretations and assumptions made by us, as well as additional regulatory guidance that may be issued. Item 8. Financial Statements and Supplementary Data – Note 7 to the consolidated financial statements for further disclosure regarding Tax Reform Legislation.
We have recorded deferred tax assets and liabilities, measured at enacted tax rates, for temporary differences between book basis and tax basis, tax credit carryforwards and operating loss carryforwards. In accordance with U.S. GAAP accounting standards, we routinely assess the realizability of our deferred tax assets and reduce such assets, to the expected realizable amount, by a valuation allowance if it is more likely than not that some portion or all of the deferred tax assets will not be realized. In assessing the need for additional or adjustments to existing valuation allowances, we consider all available positive and negative evidence. Positive evidence includes reversals of temporary differences, forecasts of future taxable income, assessment of future business assumptions and applicable tax planning strategies that are prudent and feasible. Negative evidence includes losses in recent years as well as the forecasts of future income (loss) in the realizable period. In making our assessment regarding valuation allowances, we weight the evidence based on objectivity.
We base our future taxable income estimates on projected financial information which we believe to be reasonably likely to occur. Numerous judgments and assumptions are inherent in the estimation of future taxable income, including factors such as future operating conditions and the assessment of the effects of foreign taxes on our U.S. federal income taxes. Future operating conditions can be affected by numerous factors, including (i) future crude oil and condensate, NGLs and natural gas prices, (ii) estimated quantities of crude oil and condensate, NGLs and natural gas, (iii) expected timing of production, and (iv) future capital requirements. These assumptions are described in further detail above regarding our impairment assessment of long-lived assets. An estimate of the sensitivity to changes in assumptions resulting in future taxable income calculations is not practicable, given the numerous assumptions that can materially affect our estimates. Unfavorable adjustments to some of the above listed assumptions would likely be offset by favorable adjustments in other assumptions. For example, the impact of sustained reduced commodity prices on future taxable income would likely be partially offset by lower capital expenditures.
Based on the assumptions and judgments described above, as of December 31, 2017,2019, we reflect a valuation allowance in our Consolidated Balance Sheetconsolidated balance sheet of $926$699 million against our gross deferred tax assets of $2.0$2.4 billion in various jurisdictions in which we operate. Our gross deferred tax assets consist primarily of federal U.S. operating loss carryforwards of $898$655 million, which will expire in 2035 2036- 2037, and 2037.$829 million which can be carried forward indefinitely. Since December 31, 2016, we have maintained a full valuation allowance on our net federal deferred tax assets. If objective negative evidence in the form of cumulative losses isare no longer present and additional weight is given to subjective evidence such as forecasted projections of taxable income in future years, we would adjust the amount of the federal deferred tax assets considered realizable and reduce the provision for income taxes in the period of adjustment. See Item 8. Financial Statements and Supplementary Data – Note 8 to the consolidated financial statements for further detail.
Pension and Other Postretirement Benefit Obligations
Accounting for pension and other postretirement benefit obligations involves numerous assumptions, the most significant of which relate to the following:
the discount rate for measuring the present value of future plan obligations;
the expected long-term return on plan assets;
the rate of future increases in compensation levels; and
health care cost projections.
We develop our demographics and utilize the work of third-party actuaries to assist in the measurement of these obligations. We have selected different discount rates for our U.S. pension plans and our other U.S. postretirement benefit plans due to the different projected benefit payment patterns. In determining the assumed discount rates, our methods include a

review of market yields on high-quality corporate debt and use of our third-party actuary'sactuary’s discount rate model. This model calculates an equivalent single discount rate for the projected benefit plan cash flows using a yield curve derived from bond yields. The yield curve represents a series of annualized individual spot discount rates from 0.5 to 99 years. The bonds used are rated AA or higher by a recognized rating agency, only non-callable bonds are included and outlier bonds (bonds that have a yield to maturity that significantly deviates from the average yield within each maturity grouping) are removed. Each issue is required to have at least $250$300 million par value outstanding. The constructed yield curve is based on those bonds representing the 50% highest yielding issuances within each defined maturity group.
Of the assumptions used to measure obligations and estimated annual net periodic benefit cost as of December 31, the discount rate has the most significant effect on the periodic benefit cost reported for the plans. The hypothetical impacts of a 0.25% change in the discount rates of 3.55% for our U.S. pension plans and 3.54% for our other U.S. postretirement benefit plans is summarized in the table below:
 Impact of a 0.25% Increase in Discount Rate Impact of a 0.25% Decrease in Discount Rate
(In millions)Obligation Expense Obligation Expense
U.S. pension plans$(4) $
 $4
 $
Other U.S. postretirement benefit plans$(5) $
 $5
 $
The asset rate of return assumption for the funded U.S. plan considers the plan'splan’s asset mix (currently targeted at approximately 55% equity and 45% other fixed income securities), past performance and other factors. Certain components of the asset mix are modeled with various assumptions regarding inflation, debt returns and stock yields. Decreasing the 6.50% asset rate of return assumption by 0.25% would not have a significant impact on our defined benefit pension expense.
Compensation change assumptions are based on historical experience, anticipated future management actions and demographics of the benefit plans. Health care cost trend assumptions are developed based on historical cost data, the near-term outlook and an assessment of likely long-term trends.

Item 8. Financial Statements and Supplementary Data – Note 1719 to the consolidated financial statements includes detailed information about the assumptions used to calculate the components of our annual defined benefit pension and other postretirement plan expense, as well as the obligations and accumulated other comprehensive income reported on the consolidated balance sheets.
Contingent Liabilities
We accrue contingent liabilities for environmental remediation, tax deficiencies related to operating taxes, as well as tax disputes and litigation claims when such contingencies are probable and estimable. Actual costs can differ from estimates for many reasons. For instance, settlement costs for claims and litigation can vary from estimates based on differing interpretations of laws, opinions on responsibility and assessments of the amount of damages. Similarly, liabilities for environmental remediation may vary from estimates because of changes in laws, regulations and their interpretation, additional information on the extent and nature of site contamination and improvements in technology. Our in-house legal counsel regularly assesses these contingent liabilities. In certain circumstances outside legal counsel is utilized.
We generally record losses related to these types of contingencies as other operating expense or general and administrative expense in the consolidated statements of income, except for tax contingencies unrelated to income taxes, which are recorded as taxes other than income. For additional information on contingent liabilities, see Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Management’s Discussion and Analysis of Environmental Matters, Litigation and Contingencies.Contingencies.
An estimate of the sensitivity to net income if other assumptions had been used in recording these liabilities is not practical because of the number of contingencies that must be assessed, the number of underlying assumptions and the wide range of reasonably possible outcomes, in terms of both the probability of loss and the estimates of such loss.
Accounting Standards Not Yet Adopted
See Item 8. Financial Statements and Supplementary Data – Note 2 to the consolidated financial statements.

45




Item 7A. Quantitative and Qualitative Disclosures About Market Risk
We are exposed to market risks related to the volatility of crude oil and condensate, NGLs, and natural gas prices as the volatility of these prices continues to impact our industry. We expect commodity prices to remain volatile and unpredictable in the future. We are also exposed to market risks related to changes in interest rates and foreign currency exchange rates. We employ various strategies, including the use of financial derivative instruments, to manage the risks related to these fluctuations. We are at risk for changes in the fair value of all of our derivative instruments; however, such risk should be mitigated by price or rate changes related to the underlying commodity or financial transaction. While the use of derivative instruments could materially affect our results of operations in particular quarterly or annual periods, we believe that the use of these instruments will not have a material adverse effect on our financial position or liquidity.
See Item 8. Financial Statements and Supplementary Data – Notes 13Note 15 and 14Note 16 to the consolidated financial statements for more information about the fair value measurement of our derivatives, the amounts recorded in our consolidated balance sheets and statements of income and the related notional amounts.
Commodity Price Risk
Our strategy is to obtain competitive prices for our products and allow operating results to reflect market price movements dictated by supply and demand. However, management will periodically protect prices on forecasted sales to support cash flow and liquidity, as deemed appropriate. We may use a variety of commodity derivative instruments, including futures, forwards, swaps and combinations of options, as part of an overall program to manage commodity price risk in our business. Our consolidated results for 20172019, 2018 and 20162017 were impacted by crude oil and natural gas derivatives related to a portion of our forecasted United States E&P sales. The table below provides a summary of open positions as
As of December 31, 20172019, we had various open commodity derivatives related to crude oil and natural gas with a net asset position of $4 million. Based on the weighted average price for those contracts:
Crude Oil
 2018 2019
 First Quarter Second Quarter Third Quarter Fourth Quarter First Quarter Second Quarter
Three-Way Collars (a)
           
Volume (Bbls/day)85,000 85,000 85,000 85,000 10,000 10,000
Weighted average price per Bbl:           
Ceiling$56.38 $56.38 $56.96 $56.96 $60.00 $60.00
Floor$51.65 $51.65 $51.53 $51.53 $55.00 $55.00
Sold put$45.00 $45.00 $44.65 $44.65 $47.00 $47.00
Swaps           
Volume (Bbls/day)20,000 20,000    
Weighted average price per Bbl$55.12 $55.12 $— $— $— $—
Basis Swaps (b)
           
Volume (Bbls/day)5,000 5,000 10,000 10,000  
Weighted average price per Bbl$(0.60) $(0.60) $(0.67) $(0.67) $— $—
(a)
Between January 1, 2018 and February 12, 2018, we entered into 10,000 Bbls/day of three-way collars for July - December 2018 with an average ceiling
price of $63.51, a floor price of $57.00, and a sold put price of $50.00 and 20,000 Bbls/day of three-way collars for January - JuneDecember 31, 2019, with an average ceiling price of $67.92, a floor price of $53.50, and a sold put price of $46.50.
(b)
The basis differential price is between WTI Midland and WTI Cushing.

Natural Gas
 2018
 First QuarterSecond QuarterThird QuarterFourth Quarter
Three-Way Collars    
Volume (MMBtu/day)200,000160,000160,000160,000
Weighted average price per MMBtu    
Ceiling$3.79$3.61$3.61$3.61
Floor$3.08$3.00$3.00$3.00
Sold put$2.55$2.50$2.50$2.50
The following table provides a sensitivity analysis of the projected incremental effect on income (loss) from operations of a hypothetical 10% change inpublished NYMEX WTI and Henry Hub futures prices, ona hypothetical 10% increase or decrease (per bbl for crude oil and per MMBtu for natural gas) would change the fair values of our opennet commodity derivative instruments as of December 31, 2017:open positions to the following:
(In millions)Hypothetical Price Increase of 10%Hypothetical Price Decrease of 10%Hypothetical Price Increase of 10% Hypothetical Price Decrease of 10%
Crude oil derivatives$(180)$149
$(65) $50
Natural gas derivatives(8)7
(1) 
Total$(188)$156
$(66) $50
Interest Rate Risk
At December 31, 2017,2019, our portfolio of long-term debt was substantiallyis comprised of fixed rate instruments.fixed-rate instruments with an outstanding balance of $5.5 billion. Our sensitivity to interest rate movements and corresponding changes in the fair value of our fixed ratefixed-rate debt portfolio affects our results of operations and cash flows only when we elect to repurchase or otherwise retire fixed-rate debt at prices different than carrying value. Sensitivity analysis
We also manage our exposure to interest rate movements by utilizing interest rate swap agreements to hedge variations in cash flows related to the 1-month LIBOR component of future lease payments on our future Houston office. At December 31, 2019, we had forward starting interest rate swap agreements with a total notional of $320 million designated as cash flow hedges. The incremental change on the incremental effectfair value of a hypothetical 10% increase in interest rates by $3 million, resulting in a fair value of $5 million. The incremental change on the fair value of a hypothetical 10% decrease in interest rates on our financial assets and liabilities asthese interest rate swaps by $2 million, resulting in a fair value of December 31, 2017, is provided in the following table.less than $1 million.
(In millions)                         Fair Value Hypothetical Price Increase of 10%Hypothetical Price Decrease of 10%
Financial assets (liabilities): (a)
    
Long-term debt, including amounts due within one year$(5,976)
(b)(c) 
$190
$(202)
(a)
Fair values of cash and cash equivalents, receivables, accounts payable and accrued interest approximate carrying value and are relatively insensitive to changes in interest rates due to the short-term maturity of the instruments. Accordingly, these instruments are excluded from the table.
(b)
Fair value was based on market prices where available, or current borrowing rates for financings with similar terms and maturities.
(c)
Excludes capital leases.
Counterparty Risk
We are also exposed to financial risk in the event of nonperformance by counterparties. If commodity prices fall below current levels, some of our counterparties may experience liquidity problems and may not be able to meet their financial obligations to us. We review the creditworthiness of counterparties and use master netting agreements when appropriate.

46



Item 8. Financial Statements and Supplementary Data
Index
 Page



47



Management’s Responsibilities for Financial Statements
To the Stockholders of Marathon Oil Corporation:
The accompanying consolidated financial statements of Marathon Oil Corporation and its consolidated subsidiaries ("(“Marathon Oil"Oil”) are the responsibility of management and have been prepared in conformity with accounting principles generally accepted in the United States. They necessarily include some amounts that are based on best judgments and estimates. The financial information displayed in other sections of this Annual Report on Form 10-K is consistent with these consolidated financial statements.
Marathon Oil seeks to assure the objectivity and integrity of its financial records by careful selection of its managers, by organization arrangements that provide an appropriate division of responsibility and by communications programs aimed at assuring that its policies and methods are understood throughout the organization.
The Board of Directors pursues its oversight role in the area of financial reporting and internal control over financial reporting through its Audit and Finance Committee. This Committee, composed solely of independent directors, regularly meets (jointly and separately) with the independent registered public accounting firm, management and internal auditors to monitor the proper discharge by each of their responsibilities relative to internal accounting controls and the consolidated financial statements.
 
/s/ Lee M. Tillman /s/ Dane E. Whitehead 
Chairman, President and Chief Executive Officer Executive Vice President and Chief Financial Officer 




Management’s Report on Internal Control over Financial Reporting
To the Stockholders of Marathon Oil Corporation:
Marathon Oil’s management is responsible for establishing and maintaining adequate internal control over financial reporting (as defined in Rules 13(a) – 15(f) under the Securities Exchange Act of 1934). Our internal control over financial reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of the consolidated financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements and even when determined to be effective, can only provide reasonable assurance with respect to financial statement preparation and presentation. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions or that the degree of compliance with the policies or procedures may deteriorate.
An evaluation of the design and effectiveness of our internal control over financial reporting, based on the 2013 framework in Internal Control – Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission, was conducted under the supervision and with the participation of management, including our Chief Executive Officer and Chief Financial Officer. Based on the results of this evaluation, Marathon Oil’s management concluded that its internal control over financial reporting was effective as of December 31, 2017.2019.
The effectiveness of Marathon Oil’s internal control over financial reporting as of December 31, 20172019 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report which is included herein.

/s/ Lee M. Tillman /s/ Dane E. Whitehead 
Chairman, President and Chief Executive Officer Executive Vice President and Chief Financial Officer 

48



Report of Independent Registered Public Accounting Firm




To the Board of Directors and Stockholders of Marathon Oil Corporation:Corporation
Opinions on the Financial Statements and Internal Control over Financial Reporting
We have audited the accompanying consolidated balance sheetssheet of Marathon Oil Corporation and its subsidiaries (the “Company”) as of December 31, 20172019 and 2016,2018, and the related consolidated statements of income, of comprehensive income, of stockholders’ equity and of cash flows and stockholders’ equity for each of the three years in the period ended December 31, 2017,2019, including the related notes (collectively referred to as the “consolidated financial statements”). We also have audited the Company's internal control over financial reporting as of December 31, 2017,2019, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 20172019 and 2016,2018, and the results of theirits operations and theirits cash flows for each of the three years in the period ended December 31, 20172019 in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2017,2019, based on criteria established in Internal Control - Integrated Framework (2013) issued by the COSO.
Basis for Opinions
The Company's management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management'sManagement’s Report on Internal Control over Financial Reporting. Our responsibility is to express opinions on the Company’s consolidated financial statements and on the Company's internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) ("PCAOB")(PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.

Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.


Definition and Limitations of Internal Control over Financial Reporting
A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Critical Audit Matters
The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that (i) relates to accounts or disclosures that are material to the consolidated financial statements and (ii) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

The Impact of Proved Oil and Condensate, Natural Gas Liquids (NGLs) and Natural Gas Reserves on Proved Oil and Gas Properties, Net

As described in Notes 1 and 10 to the consolidated financial statements, the Company’s consolidated property, plant and equipment, net balance was $17,000 million as of December 31, 2019, and depreciation, depletion, and amortization (DD&A) expense for the year ended December 31, 2019 was $2,397 million, both of which substantially relate to proved oil and gas properties. The Company uses the successful efforts method of accounting for its oil and gas producing activities. Under this method, capitalized costs to acquire oil and natural gas properties are depreciated and depleted on a units-of-production basis based on estimated proved reserves. Capitalized costs of exploratory wells and development costs are depreciated and depleted on a units-of-production basis based on estimated proved developed reserves. As discussed by management, reserve estimates may change as a result of a number of factors, including but not limited to, changes in contractual, operational, economic and political conditions; additional development activity and future development costs; production history; and continual reassessment of the viability of future production volumes under varying economic conditions. The estimates of oil and gas reserves have been developed by specialists, specifically petroleum engineers and geoscientists.

The principal considerations for our determination that performing procedures relating to the impact of proved oil and condensate, NGLs and natural gas reserves on proved oil and gas properties, net is a critical audit matter are there was significant judgment by management, including the use of specialists, when developing the estimates of proved oil and gas reserves, which in turn led to a high degree of auditor judgment, subjectivity and effort in performing procedures to evaluate the significant assumptions used in developing those estimates, including future development costs and future production volumes.

Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall opinion on the consolidated financial statements. These procedures included testing the effectiveness of controls relating to management’s estimates of proved oil and condensate, NGLs and natural gas reserves and the calculation of DD&A expense. These procedures also included, among others, evaluating the significant assumptions used by management in developing these estimates, including future development costs and future production volumes, and testing the unit-of-production rate used to calculate DD&A expense. The work of management’s specialists was used in performing the procedures to evaluate the reasonableness of these estimates. As a basis for using this work, the specialists’ qualifications and objectivity were understood, as well as the methods and assumptions used by the specialist. The procedures performed also included tests of the data used by the specialists and an evaluation of the specialists’ findings. Evaluating the significant assumptions relating to the estimates of proved oil and condensate, NGLs and natural gas reserves also involved obtaining evidence to support the reasonableness of the assumptions, including whether the assumptions used were reasonable considering the current and past performance of the Company, and whether they were consistent with evidence obtained in other areas of the audit.

/s/ PricewaterhouseCoopers LLP
Houston, Texas
February 22, 201820, 2020


We have served as the Company’s auditor since 1982.  



50




MARATHON OIL CORPORATION
Consolidated Statements of Income
 Year Ended December 31,
(In millions, except per share data)2017 2016 2015
Revenues and other income:     
Sales and other operating revenues, including related party$4,211
 $2,930
 $4,136
Marketing revenues162
 240
 499
Income from equity method investments256
 175
 145
Net gain (loss) on disposal of assets58
 389
 120
Other income78
 53
 53
Total revenues and other income4,765
 3,787
 4,953
Costs and expenses:     
Production706
 712
 979
Marketing, including purchases from related parties168
 245
 500
Other operating431
 484
 410
Exploration409
 323
 971
Depreciation, depletion and amortization2,372
 2,156
 2,721
Impairments229
 67
 721
Taxes other than income183
 151
 216
General and administrative400
 481
 588
Total costs and expenses4,898
 4,619
 7,106
Income (loss) from operations(133) (832) (2,153)
Net interest and other(270) (332) (286)
Loss on early extinguishment of debt(51) 
 
Income (loss) from continuing operations before income taxes(454) (1,164) (2,439)
Provision (benefit) for income taxes376
 923
 (738)
Income (loss) from continuing operations(830) (2,087) (1,701)
Income (loss) from discontinued operations(4,893) (53) (503)
Net income (loss)$(5,723) $(2,140) $(2,204)
Per Share Data     
Basic:     
Income (loss) from continuing operations$(0.97) $(2.55) $(2.51)
Income (loss) from discontinued operations$(5.76) $(0.06) $(0.75)
Net income (loss)$(6.73) $(2.61) $(3.26)
Diluted:     
Income (loss) from continuing operations$(0.97) $(2.55) $(2.51)
Income (loss) from discontinued operations$(5.76) $(0.06) $(0.75)
Net income (loss)$(6.73) $(2.61) $(3.26)
Dividends$0.20
 $0.20
 $0.68
Weighted average shares:     
Basic850
 819
 677
Diluted850
 819
 677
The accompanying notes are an integral part of these consolidated financial statements.

MARATHON OIL CORPORATION
Consolidated Statements of Comprehensive Income
 Year Ended December 31,
(In millions)2017 2016 2015
Net income (loss)$(5,723) $(2,140) $(2,204)
Other comprehensive income (loss)     
Postretirement and postemployment plans     
Change in actuarial loss and other21
 16
 228
Income tax provision (benefit)7
 (4) (86)
Postretirement and postemployment plans, net of tax28
 12
 142
Derivative hedges     
Net unrecognized gain (loss)(13) 61
 
Reclassification of gains on terminated derivative hedges(47) 
 
Income tax provision (benefit)21
 (22) 
Derivative hedges, net of tax(39) 39
 
Foreign currency hedges     
   Net recognized loss reclassified to discontinued operations34
 
 
   Income tax provision (benefit)(4) 
 
Foreign currency hedges, net of tax30
 
 
Other, net of tax2
 1
 
Other comprehensive income (loss)21
 52
 142
Comprehensive income (loss)$(5,702) $(2,088) $(2,062)
 Year Ended December 31,
(In millions, except per share data)2019 2018 2017
Revenues and other income:     
Revenues from contracts with customers$5,063
 $5,902
 $4,247
Net loss on commodity derivatives(72) (14) (36)
Marketing revenues
 
 162
Income from equity method investments87
 225
 256
Net gain on disposal of assets50
 319
 58
Other income62
 150
 78
Total revenues and other income5,190
 6,582
 4,765
Costs and expenses:     
Production712
 842
 716
Marketing, including purchases from related parties
 
 168
Shipping, handling and other operating605
 575
 431
Exploration149
 289
 409
Depreciation, depletion and amortization2,397
 2,441
 2,372
Impairments24
 75
 229
Taxes other than income311
 299
 183
General and administrative356
 394
 371
Total costs and expenses4,554
 4,915
 4,879
Income (loss) from operations636
 1,667
 (114)
Net interest and other(244) (226) (270)
Other net periodic benefit costs3
 (14) (19)
Loss on early extinguishment of debt(3) 
 (51)
Income (loss) from continuing operations before income taxes392
 1,427
 (454)
Provision (benefit) for income taxes(88) 331
 376
Income (loss) from continuing operations480
 1,096
 (830)
Loss from discontinued operations
 
 (4,893)
Net income (loss)$480
 $1,096
 $(5,723)
Per basic share:     
Income (loss) from continuing operations$0.59
 $1.30
 $(0.97)
Loss from discontinued operations$
 $
 $(5.76)
Net income (loss)$0.59
 $1.30
 $(6.73)
Per diluted share:     
Income (loss) from continuing operations$0.59
 $1.29
 $(0.97)
Loss from discontinued operations$
 $
 $(5.76)
Net income (loss)$0.59
 $1.29
 $(6.73)
Weighted average common shares outstanding:     
Basic810
 846
 850
Diluted810
 847
 850
The accompanying notes are an integral part of these consolidated financial statements.


51



MARATHON OIL CORPORATION
Consolidated Balance Sheets
Statements of Comprehensive Income
 December 31,
(In millions, except par values and share amounts)2017 2016
Assets   
Current assets:   
Cash and cash equivalents$563
 $2,488
Receivables, less reserve of $12 and $61,082
 748
Notes receivable748
 
Inventories126
 136
Other current assets36
 66
Current assets held for sale11
 227
Total current assets2,566
 3,665
Equity method investments847
 931
Property, plant and equipment, less accumulated depreciation, 
  
depletion and amortization of $21,564 and $20,25517,665
 16,727
Goodwill115
 115
Other noncurrent assets764
 558
Noncurrent assets held for sale55
 9,098
Total assets$22,012
 $31,094
Liabilities   
Current liabilities:   
Accounts payable$1,395
 $967
Payroll and benefits payable108
 129
Accrued taxes177
 94
Other current liabilities288
 243
Long-term debt due within one year
 686
Current liabilities held for sale
 121
Total current liabilities1,968
 2,240
Long-term debt5,494
 6,581
Deferred tax liabilities833
 769
Defined benefit postretirement plan obligations362
 345
Asset retirement obligations1,428
 1,602
Deferred credits and other liabilities217
 225
Noncurrent liabilities held for sale2
 1,791
Total liabilities10,304
 13,553
Commitments and contingencies
 

Stockholders’ Equity   
Preferred stock - no shares issued or outstanding (no par value,   
 26 million shares authorized)
 
Common stock:   
Issued – 937 million and 937 million shares, respectively (par value $1 per share, 1.1 billion shares authorized)937
 937
Held in treasury, at cost – 87 million and 90 million shares(3,325) (3,431)
Additional paid-in capital7,379
 7,446
Retained earnings6,779
 12,672
Accumulated other comprehensive loss(62) (83)
Total stockholders' equity11,708
 17,541
Total liabilities and stockholders' equity$22,012
 $31,094
 Year Ended December 31,
(In millions)2019 2018 2017
Net income (loss)$480
 $1,096
 $(5,723)
Other comprehensive income (loss), net of tax     
Postretirement and postemployment plans:     
Change in actuarial gain and other54
 117
 21
Income taxes on postretirement and postemployment plans(38) 4
 7
Postretirement and postemployment plans, net of tax16
 121
 28
Derivative hedges:     
Net unrecognized gain (loss)2
 
 (13)
Reclassification of gains on terminated derivative hedges
 
 (47)
Income taxes on derivative hedges
 
 21
Derivative hedges, net of tax2
 
 (39)
Foreign currency translation:     
Net recognized loss reclassified to discontinued operations
 
 34
Foreign currency translation adjustment related to sale of U.K. business30
 
 
Income taxes on foreign currency translation(7) 
 (4)
Foreign currency translation, net of tax23
 
 30
Other, net of tax1
 4
 2
Other comprehensive income42
 125
 21
Comprehensive income (loss)$522
 $1,221
 $(5,702)

The accompanying notes are an integral part of these consolidated financial statements.


52



MARATHON OIL CORPORATION
Consolidated Statements of Cash Flows
Balance Sheet
 Year Ended December 31,
(In millions)2017 2016 2015
Increase (decrease) in cash and cash equivalents     
Operating activities: 
    
Net income (loss)$(5,723) $(2,140) $(2,204)
Adjustments to reconcile net income (loss) to net cash provided by operating activities: 
    
Discontinued operations4,893
 53
 503
Depreciation, depletion and amortization2,372
 2,156
 2,721
Impairments229
 67
 721
Exploratory dry well costs and unproved property impairments323
 220
 867
Net (gain) loss on disposal of assets(58) (389) (120)
Deferred income taxes(61) 828
 (804)
Net (gain) loss on derivative instruments(11) 63
 (126)
Net cash received (paid) in settlement of derivative instruments98
 61
 55
Stock based compensation50
 48
 45
Equity method investments, net20
 17
 33
Changes in:     
Current receivables(334) 67
 790
Inventories10
 64
 25
Current accounts payable and accrued liabilities297
 (137) (906)
All other operating, net(117) (77) (63)
Net cash provided by operating activities from continuing operations1,988
 901
 1,537
Investing activities:     
Additions to property, plant and equipment(1,974) (1,204) (3,485)
Acquisitions, net of cash acquired(1,891) (902) 
Disposal of assets, net of cash transferred to the buyer1,787
 1,219
 225
Equity method investments - return of capital64
 55
 77
Purchases of short term investments
 
 (925)
Maturities of short term investments
 
 925
All other investing, net(30) (1) 24
Net cash used in investing activities from continuing operations(2,044) (833) (3,159)
Financing activities:     
Borrowings988
 
 1,996
Debt repayments(2,764) (1) (1,069)
Debt extinguishment costs(46) 
 
Common stock issuance
 1,236
 
Purchases of common stock(11) (6) (11)
Dividends paid(170) (162) (460)
All other financing, net
 1
 (5)
Net cash provided by (used in) financing activities(2,003) 1,068
 451
Cash Flow from Discontinued Operations:     
Operating activities141
 177
 39
Investing activities(13) (41) (43)
Changes in cash included in current assets held for sale2
 100
 90
Net increase in cash and cash equivalents of discontinued operations130
 236
 86
Effect of exchange rate changes on cash and cash equivalents:4
 (3) (3)
Net increase (decrease) in cash and cash equivalents(1,925) 1,369
 (1,088)
Cash and cash equivalents at beginning of period2,488
 1,119
 2,207
Cash and cash equivalents at end of period$563
 $2,488
 $1,119
 December 31,
(In millions, except par values and share amounts)2019 2018
Assets   
Current assets:   
Cash and cash equivalents$858
 $1,462
Receivables, less reserve of $11 and $111,122
 1,079
Inventories72
 96
Other current assets83
 257
Current assets held for sale
 27
Total current assets2,135
 2,921
Equity method investments663
 745
Property, plant and equipment, less accumulated depreciation, depletion and amortization of $18,003 and $21,83017,000
 16,804
Goodwill95
 97
Other noncurrent assets352
 723
Noncurrent assets held for sale
 31
Total assets$20,245
 $21,321
Liabilities   
Current liabilities:   
Accounts payable$1,307
 $1,320
Payroll and benefits payable112
 154
Accrued taxes118
 181
Other current liabilities208
 170
Current liabilities held for sale
 7
Total current liabilities1,745
 1,832
Long-term debt5,501
 5,499
Deferred tax liabilities186
 199
Defined benefit postretirement plan obligations183
 195
Asset retirement obligations243
 1,081
Deferred credits and other liabilities234
 279
Noncurrent liabilities held for sale
 108
Total liabilities8,092
 9,193
Commitments and contingencies

 


Stockholders’ Equity   
Preferred stock – no shares issued or outstanding (no par value, 26 million shares authorized)
 
Common stock:   
Issued – 937 million shares (par value $1 per share, 1.925 billion shares authorized at December 31, 2019 and December 31, 2018)937
 937
Held in treasury, at cost – 141 million shares and 118 million shares(4,089) (3,816)
Additional paid-in capital7,207
 7,238
Retained earnings7,993
 7,706
Accumulated other comprehensive income105
 63
Total stockholders’ equity12,153
 12,128
Total liabilities and stockholders’ equity$20,245
 $21,321
The accompanying notes are an integral part of these consolidated financial statements.

53



MARATHON OIL CORPORATION
Consolidated Statements of Stockholders’ EquityCash Flows
 Total Equity of Marathon Oil Stockholders  
(In millions)
Preferred
Stock
 
Common
Stock
 
Treasury
Stock
 
Additional
Paid-in
Capital
 
Retained
Earnings
 
Accumulated
Other
Comprehensive
Loss
 
Total
Equity
December 31, 2014 Balance$
 $770
 $(3,642) $6,531
 $17,638
 $(277) $21,020
Shares issued - stock-based             
compensation
 
 96
 (32) 
 
 64
Shares repurchased
 
 (8) 
 
 
 (8)
Stock-based compensation
 
 
 (1) 
 
 (1)
Net loss
 
 
 
 (2,204) 
 (2,204)
Other comprehensive loss
 
 
 
 
 142
 142
Dividends paid
 
 
 
 (460) 
 (460)
December 31, 2015 Balance$
 $770
 $(3,554) $6,498
 $14,974
 $(135) $18,553
Shares issued - stock-based             
compensation
 
 128
 (86) 
 
 42
Shares repurchased
 
 (5) 
 
 
 (5)
Stock-based compensation
 
 
 (35) 
 
 (35)
Net loss
 
 
 
 (2,140) 
 (2,140)
Other comprehensive income
 
 
 
 
 52
 52
Dividends paid
 
 
 
 (162) 
 (162)
Common stock issuance
 167
 
 1,069
 
 
 1,236
December 31, 2016 Balance$
 $937
 $(3,431) $7,446
 $12,672
 $(83) $17,541
Shares issued - stock-based             
compensation
 
 117
 (50) 
 
 67
Shares repurchased
 
 (11) 
 
 
 (11)
Stock-based compensation
 
 
 (17) 
 
 (17)
Net loss
 
 
 
 (5,723) 
 (5,723)
Other comprehensive income
 
 
 
 
 21
 21
Dividends paid
 
 
 
 (170) 
 (170)
Common stock issuance
 
 
 
 
 
 
December 31, 2017 Balance$
 $937
 $(3,325) $7,379
 $6,779
 $(62) $11,708
              
(Shares in millions)
Preferred
Stock
 
Common
Stock
 
Treasury
Stock
        
December 31, 2014 Balance
 770
 95
        
Shares issued - stock-based             
compensation
 
 (2)        
Shares repurchased
 
 
        
December 31, 2015 Balance
 770
 93
        
Shares issued - stock-based             
compensation
 
 (3)        
Shares repurchased
 
 
        
Common stock issuance
 167
 
        
December 31, 2016 Balance
 937
 90
        
Shares issued - stock-based             
compensation
 
 (3)        
Shares repurchased
 
 
        
Common stock issuance
 
 
        
December 31, 2017 Balance
 937
 87
 
      
 Year Ended December 31,
(In millions)2019 2018 2017
Increase (decrease) in cash and cash equivalents     
Operating activities: 
    
Net income (loss)$480
 $1,096
 $(5,723)
Adjustments to reconcile net income (loss) to net cash provided by operating activities from continuing operations: 
    
Discontinued operations
 
 4,893
Depreciation, depletion and amortization2,397
 2,441
 2,372
Impairments24
 75
 229
Exploratory dry well costs and unproved property impairments114
 255
 323
Net gain on disposal of assets(50) (319) (58)
Loss on early extinguishment of debt3
 
 51
Deferred income taxes(34) 52
 (61)
Net loss on derivative instruments72
 14
 36
Net settlements of derivative instruments52
 (281) 45
Pension and other post retirement benefits, net(52) (65) (46)
Stock-based compensation60
 53
 49
Equity method investments, net18
 45
 20
Changes in:     
Current receivables52
 (133) (334)
Inventories3
 (1) 10
Current accounts payable and accrued liabilities(187) 179
 297
Other current assets and liabilities(4) (22) 1
All other operating, net(199) (155) (116)
Net cash provided by operating activities from continuing operations2,749
 3,234
 1,988
Investing activities:     
Additions to property, plant and equipment(2,550) (2,753) (1,974)
Additions to other assets36
 (26) (25)
Acquisitions, net of cash acquired(293) (25) (1,891)
Disposal of assets, net of cash transferred to the buyer(76) 1,264
 1,787
Equity method investments - return of capital64
 57
 64
All other investing, net1
 13
 (5)
Net cash used in investing activities from continuing operations(2,818) (1,470) (2,044)
Financing activities:     
Borrowings600
 
 988
Debt repayments(600) 
 (2,764)
Debt extinguishment costs(2) 
 (46)
Purchases of common stock(362) (713) (11)
Dividends paid(162) (169) (170)
All other financing, net(9) 23
 
Net cash used in financing activities(535) (859) (2,003)
Net increase in cash and cash equivalents of discontinued operations (Note 5)
 
 130
Effect of exchange rate on cash and cash equivalents
 (2) 4
Net increase (decrease) in cash and cash equivalents(604) 903
 (1,925)
Cash and cash equivalents at beginning of period1,462
 563
 2,488
Cash and cash equivalents included in current assets held for sale
 (4) 
Cash and cash equivalents at end of period$858
 $1,462
 $563
The accompanying notes are an integral part of these consolidated financial statements.

54


MARATHON OIL CORPORATION
Consolidated Statements of Stockholders’ Equity
 Total Equity of Marathon Oil Stockholders  
(In millions)
Preferred
Stock
 
Common
Stock
 
Treasury
Stock
 
Additional
Paid-in
Capital
 
Retained
Earnings
 
Accumulated
Other
Comprehensive
Income (Loss)
 
Total
Equity
December 31, 2016 Balance$
 $937
 $(3,431) $7,446
 $12,672
 $(83) $17,541
Shares issued - stock-based
compensation

 
 117
 (50) 
 
 67
Shares repurchased
 
 (11) 
 
 
 (11)
Stock-based compensation
 
 
 (17) 
 
 (17)
Net loss
 
 
 
 (5,723) 
 (5,723)
Other comprehensive income
 
 
 
 
 21
 21
Dividends paid ($0.20 per share)
 
 
 
 (170) 
 (170)
December 31, 2017 Balance$
 $937
 $(3,325) $7,379
 $6,779
 $(62) $11,708
Shares issued - stock-based
compensation

 
 221
 (109) 
 
 112
Shares repurchased
 
 (712) 
 
 
 (712)
Stock-based compensation
 
 
 (32) 
 
 (32)
Net income
 
 
 
 1,096
 
 1,096
Other comprehensive income
 
 
 
 
 125
 125
Dividends paid ($0.20 per share)
 
 
 
 (169) 
 (169)
December 31, 2018 Balance$
 $937
 $(3,816) $7,238
 $7,706
 $63
 $12,128
Cumulative-effect adjustment (Note 2)
 
 
 
 (31) 
 (31)
Shares issued - stock-based
compensation

 
 89
 (26) 
 
 63
Shares repurchased
 
 (362) 
 
 
 (362)
Stock-based compensation
 
 
 (5) 
 
 (5)
Net income
 
 
 
 480
 
 480
Other comprehensive income
 
 
 
 
 42
 42
Dividends paid ($0.20 per share)
 
 
 
 (162) 
 (162)
December 31, 2019 Balance$
 $937
 $(4,089) $7,207
 $7,993
 $105
 $12,153
              
(Shares in millions)
Preferred
Stock
 
Common
Stock
 
Treasury
Stock
        
December 31, 2016 Balance
 937
 90
        
Shares issued - stock-based
compensation

 
 (3)        
December 31, 2017 Balance
 937
 87
        
Shares issued - stock-based
compensation

 
 (6)        
Shares repurchased
 
 37
        
December 31, 2018 Balance
 937
 118
        
Shares issued - stock-based
compensation

 
 (2)        
Shares repurchased
 
 25
        
December 31, 2019 Balance
 937
 141
 
      
The accompanying notes are an integral part of these consolidated financial statements.

55

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements





1. Summary of Principal Accounting Policies
We are a global energyan independent exploration and production company engaged in exploration, production and marketing of crude oil and condensate, NGLs and natural gas; as well as production and marketing of products manufactured from natural gas, such as LNG and methanol, in E.G.
Basis of presentation and principles applied in consolidation These consolidated financial statements, including notes have been prepared in accordance with U.S. GAAP. These consolidated financial statements include the accounts of our controlled subsidiaries. Investments in unincorporated joint ventures and undivided interests in certain operating assets are consolidated on a pro rata basis.
Equity method investments– Investments in entities over which we have significant influence, but not control, are accounted for using the equity method of accounting. This includes entities in which we hold majority ownership but the minority stockholders have substantive participating rights in the investee. Income from equity method investments represents our proportionate share of net income generated by the equity method investees and is reflected in revenuerevenues and other income in our consolidated statements of income. Equity method investments are included as noncurrent assets on the consolidated balance sheet.
Equity method investments are assessed for impairment whenever changes in the facts and circumstances indicate a loss in value may have occurred. When a loss is deemed to have occurred and is other than temporary, the carrying value of the equity method investment is written down to fair value, and the amount of the write-down is included in income. Differences in the basis of the investments and the separate net asset value of the investees, if any, are amortized into income over the remaining useful lives of the underlying assets, except for the excess related to goodwill.
Reclassifications – We have reclassified certain prior year amounts between operating cash flow categories to present it on a basis comparable with the current year's presentation with no impact on net cash provided by operating activities.
Discontinued operations – As a result of the sale of our Canadian business in 2017, we reflected this business as discontinued operations in all historical periods presented. Disclosures in this report related to results of operations and cash flows are presented on the basis of continuing operations unless otherwise stated. Assets and liabilities are presented as held for sale in the historical periods in the consolidated balance sheets. See Note 5 for discussion of the divestiture in further detail.
As discussed above we closed on the sale of our Canadian business, which includes our Oil Sands Mining segment and exploration stage in-situ leases in the second quarter 2017. The characteristics and composition of our North America E&P reporting segment remained unchanged and there was no effect on previously reported segment information. As all our remaining properties within the segment are located within the United States, we concluded that our North America E&P segment would be renamed United States E&P segment, effective June 30, 2017. During the year, no changes occurred to our International E&P segment. See Note 6 for further information on our reportable segments.
Use of estimates– The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements and the reported amounts of revenues and expenses during the respective reporting periods.
Estimated quantities of crude oil and condensate, NGLs and natural gas reserves is a significant estimate that requires judgment. All of the reserve data included in this Form 10-K are estimates. Reservoir engineering is a subjective process of estimating underground accumulations of crude oil and condensate, NGLs and natural gas. There are numerous uncertainties inherent in estimating quantities of proved crude oil and condensate, NGLs and natural gas reserves. The accuracy of any reserves estimate is a function of the quality of available data and of engineering and geological interpretation and judgment. As a result, reserve estimates may be different from the quantities of crude oil and condensate, NGLs and natural gas that are ultimately recovered. See unaudited Supplementary Data - Supplementary Information on Oil and gasGas Producing Activities for further detail.
Other items subject to estimates and assumptions include the carrying amounts of property, plant and equipment, asset retirement obligations, goodwill, valuation of derivative instruments and valuation allowances for deferred income tax assets, among others. Although we believe these estimates are reasonable, actual results could differ from these estimates.
Foreign currency transactions – The U.S. dollar is the functional currency of our foreign operating subsidiaries. Foreign currency transaction gains and losses are included in net income.
Revenue recognition – Revenues are recognized when products are shipped or services are provided to customers, title is transferred,associated with the sales price is fixed or determinable and collectability is reasonably assured. We follow the sales method of
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


accounting for crude oil and natural gas production imbalances and would recognize a liability if our existing proved reserves were not adequate to cover an imbalance. Imbalances have not been significant in the periods presented.
In the lower 48 states of the U.S., production volumes of crude oil and condensate, NGLs and natural gas are recognized when our performance obligation is satisfied, which typically occurs at the point where control transfers to the customer based on contract terms. Revenue is measured as the amount the company expects to receive in exchange for transferring commodities to the customer. Our hydrocarbon sales are typically based on prevailing market-based prices and may include quality or location differential adjustments. Payment is generally due within 30 days of delivery.
We typically incur shipping and handling costs prior to control transferring to the customer and account for these activities as fulfillment costs. These costs are reflected in shipping, handling and other operating expense line in our consolidated statement of income.
Our U.S. production of crude oil and condensate, NGLs and natural gas is generally sold immediately and transported to market. In our international locations,segment, liquid hydrocarbon production volumes may be stored as inventory and sold at a later time.

56

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

Cash and cash equivalents – Cash and cash equivalents include cash on hand and on deposit and investments in highly liquid debt instruments with original maturities of three months or less.
Short-term Investments - Our short-term investments are comprised of bank time deposits with original maturities of greater than three months but less than twelve months. They are classified as held-to-maturity investments, which are recorded at amortized cost.
Accounts receivable – The majority of our receivables are from purchasers of commodities or joint interest owners in properties we operate, or from purchasers of commodities, both of which are recorded at estimated or invoiced amounts and do not bear interest. We often have the ability to withhold future revenue disbursements to recover any non-payment of joint interest billings. We conduct credit reviews of commodity purchasers prior to making commodity sales to new customers or increasing credit for existing customers. Based on these reviews, we may require a standby letter of credit or a financial guarantee. We routinely assess the collectability of receivable balances to determine if the amount of the reserve in allowance for doubtful accounts is sufficient.
Notes receivable - We hold two notes receivable from the sale of our Canadian business, which closed in the second quarter of 2017. Both notes receivable were initially recorded at fair value and are reported at amortized cost. The notes receivable are evaluated for collectability on an individual basis each reporting period, based on the financial condition of the debtor. No allowances for credit losses were established for the notes receivable as of December 31, 2017. See Note 5 for additional discussion.
Inventories – Crude oil and natural gas are recorded at weighted average cost and carried at the lower of cost or net realizable value. Supplies and other items consist principally of tubular goods and equipment which are valued at weighted average cost and reviewed periodically for obsolescence or impairment when market conditions indicate.
We may enter into a contract to sell a particular quantity and quality of crude oil at a specified location and date to a particular counterparty, and simultaneously agree to buy a particular quantity and quality of the same commodity at a specified location on the same or another specified date from the same counterparty. We account for such matching buy/sell arrangements as exchanges of inventory.
Derivative instruments – We may use derivatives to manage a portion of our exposure to commodity price risk, commodity locational risk, foreign currency risk and interest rate risk. All derivative instruments are recorded at fair value. Commodity derivatives and interest rate swaps are reflected on our consolidated balance sheet on a net basis by counterparty, as they are governed by master netting agreements. Cash flows related to derivatives used to manage commodity price risk, foreign currency risk and interest rate risk are classified in operating activities. Our derivative instruments contain no significant contingent credit features.
Fair value hedges – We may use interest rate swaps to manage our exposure to interest rate risk associated with fixed interest rate debt in our portfolio. Changes in the fair values of both the hedged item and the related derivative are recognized immediately in net income with an offsetting effect included in the basis of the hedged item. The net effect is to report in net income the extent to which the hedge is not effective in achieving offsetting changes in fair value.
Cash flow hedges– We may use interest rate derivative instruments to manage the risk of interest rate changes during the period prior to anticipated borrowings as well as to stabilize future lease payments on our future Houston office, and designate them as cash flow hedges. Derivative instruments designated as cash flow hedges are linked to specific assets and liabilities or to specific firm commitments or forecasted transactions. The effective portion of changes in the fair value of a qualifying cash flow hedge are recorded in other comprehensive income until the hedged item istransaction affects earnings and are then reclassified to net income when the underlying forecasted transaction is recognized ininto net income. IneffectiveBeginning in 2019, ineffective portions of a cash flow hedge’s change in fair valuehedge are recognized currently within net interest and other on the consolidated statements of income.no longer measured or disclosed separately. However, if it is determined that the likelihood of the original forecasted transaction occurring is no longer probable or the entire accumulated gain or loss recognizedcash flow hedge is no longer expected to be highly effective, subsequent changes in other comprehensive income is immediately reclassified intofair value of the derivatives instrument are recorded in net income.
Derivatives not designated as hedges – Derivatives that are not designated as hedges may include commodity derivatives used primarily to manage price and locational risks on the forecasted sale of crude oil, NGLs, and natural gas that we produce. Changes in the fair value of derivatives not designated as hedges are recognized immediately in net income.
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


Concentrations of credit risk – All of our financial instruments, including derivatives, involve elements of credit and market risk. The most significant portion of our credit risk relates to nonperformance by counterparties. The counterparties to our financial instruments consist primarily of major financial institutions and companies within the energy industry. To manage counterparty risk associated with financial instruments, we select and monitor counterparties based on our assessment of their financial strength and on credit ratings, if available. Additionally, we limit the level of exposure with any single counterparty.
Fair value transfer – We recognize transfers between levels of the fair value hierarchy as of the end of the reporting period. If significant transfers occur, they would be disclosed in Note 14 to the consolidated financial statements.
Property, plant and equipment– We use the successful efforts method of accounting for oil and gas producing activities.
Property acquisition costs – Costs to acquire mineral interests in oil and natural gas properties, to drill exploratory wells in progress and those that find proved reserves, and to drill development wells are capitalized. Costs to drill exploratory wells that do not find proved reserves, geological and geophysical costs and costs of carrying and retaining unproved properties are expensed. Costs incurred for exploratory wells that find reserves but cannot yet be classified as proved are capitalized if (1) the well has found a sufficient quantity of reserves to justify its completion as a producing well and (2) we are making sufficient progress assessing the reserves and the economic and operating viability of the project. The status of suspended exploratory well costs is monitored continuously and reviewed at least quarterly.

57

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

Depreciation, depletion and amortization – Capitalized costs to acquire oil and natural gas properties are depreciated and depleted on a units-of-production basis based on estimated proved reserves. Capitalized costs of exploratory wells and development costs are depreciated and depleted on a units-of-production basis based on estimated proved developed reserves. Support equipment and other property, plant and equipment related to oil and gas producing activities, as well as property, plant and equipment unrelated to oil and gas producing activities, are recorded at cost and depreciated on a straight-line basis over the estimated useful lives of the assets as summarized below.
Type of Asset Range of Useful Lives
Office furniture, equipment and computer hardware 4 to 15 years
Pipelines 105 to 40 years
Plants, facilities and infrastructure 3 to 40 years


Impairments – We evaluate our oil and gas producing properties, including capitalized costs of exploratory wells and development costs, for impairment of value whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. If the sum of the expected undiscounted future cash flows from the use of the asset and its eventual disposition is less than the carrying amount of the asset, an impairment loss is recognized based on the fair value of the asset. Oil and gas producing properties are reviewed for impairment on a field-by-field basis or, in certain instances, by logical grouping of assets if there is significant shared infrastructure or contractual terms that cause economic interdependency amongst separate, discrete fields. Oil and gas producing properties deemed to be impaired are written down to their fair value, as determined by discounted future net cash flows or, if available, comparable market value. We evaluate our unproved property investment and record impairment based on time or geologic factors. Information such as drilling results, reservoir performance, seismic interpretation or future plans to develop acreage is also considered. When unproved property investments are deemed to be impaired, this amount is reported in exploration expenses in our consolidated statements of income.
Dispositions – When property, plant and equipment depreciated on an individual basis is sold or otherwise disposed of, any gains or losses are reflected in net gain (loss) on disposal of assets in our consolidated statements of income. Gains on the disposal of property, plant and equipment are recognized when earned, which is generally at the time of closing. If a loss on disposal is expected, such losses are recognized either when the assets are classified as held for sale, or are measured using a probability weighted income approach based on both the anticipated sales price and a held-for-use model depending on timing of the sale. Proceeds from the disposal of property, plant and equipment depreciated on a group basis are credited to accumulated depreciation, depletion and amortization with no immediate effect on net income until net book value is reduced to zero.
Goodwill – Goodwill represents the excess of the purchase price over the estimated fair value of the net assets acquired in the acquisition of a business. Such goodwill is not amortized, but rather is tested for impairment annually and when events or changes in circumstances indicate that the fair value of a reporting unit with goodwill has been reduced below carrying value. The impairment test requires allocating goodwill and other assets and liabilities to a reporting unit. The fair value of a reporting unit is determined and compared to the book value of the reporting unit. If the fair value of the reporting unit is less than the book value, including goodwill, then the recorded goodwill is impaired to its implied fair value with a charge to impairments.
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


Major maintenance activities – Costs for planned major maintenance are expensed in the period incurred and can include the costs of contractor repair services, materials and supplies, equipment rentals and our labor costs.
Environmental costs – We provide for remediation costs and penalties when the responsibility to remediate is probable and the amount of associated costs can be reasonably estimated. The timing of remediation accruals coincides with completion of a feasibility study or the commitment to a formal plan of action. Remediation liabilities are accrued based on estimates of known environmental exposure and are discounted when the estimated amounts are reasonably fixed or reliably determinable. Environmental expenditures are capitalized only if the costs mitigate or prevent future contamination or if the costs improve the environmental safety or efficiency of the existing assets.
Asset retirement obligations – The fair value of asset retirement obligations is recognized in the period in which the obligations are incurred if a reasonable estimate of fair value can be made. Our asset retirement obligations primarily relate to the abandonment of oil and gas producing facilities. Asset retirement obligations for such facilities include costs to dismantle and relocate or dispose of production platforms, gathering systems, wells and related structures and restoration costs of land, and seabed, including those leased. Estimates of these costs are developed for each property based on the type of production facilities and equipment, depth of water, reservoir characteristics, depth of the reservoir, market demand for equipment, currently available procedures and consultations with construction and engineering professionals.
Inflation rates and credit-adjusted-risk-free interest rates are used to estimate the fair value of asset retirement obligations. Depreciation of capitalized asset retirement costs and accretion of asset retirement obligations are recorded over time. Depreciation is generally determined on a units-of-production basis based on estimated proved developed reserves for oil and gas production facilities, while accretion of the liability occurs over the useful lives of the assets.

58

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

Deferred income taxes – Deferred tax assets and liabilities, measured at enacted tax rates, are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of assets and liabilities and their tax bases as reported in our filings with the respective taxing authorities. We routinely assess the realizability of our deferred tax assets based on several interrelated factors and reduce such assets by a valuation allowance if it is more likely than not that some portion or all of the deferred tax assets will not be realized. These factors include whether we are in a cumulative loss position in recent years, our reversal of temporary differences, and our expectation to generate sufficient future taxable income. We use the liability method in determining our provision and liabilities for our income taxes, under which current and deferred tax liabilities and assets are recorded in accordance with enacted tax laws and rates.
Stock-based compensation arrangements – The fair value of stock options is estimated on the date of grant using the Black-Scholes option pricing model. The model employs various assumptions, based on management’s best estimates at the time of grant, which impact the calculation of fair value and ultimately, the amount of expense that is recognized over the life of the stock option award. Of the required assumptions, the expected volatility of our stock price and the stock price in relation to the strike price have the most significant impact on the fair value calculation. We have utilized historical data and analyzed current information which reasonably support these assumptions.
The fair value of our restricted stock awards, restricted stock units and commonDirector restricted stock units is determined based on the market value of our common stock on the date of grant. Unearned stock-based compensation is charged to stockholders’ equity whenRestricted Stock Awards, restricted stock awardsunits, and Director restricted stock units are granted.removed from Treasury Stock at grant, vesting, and distribution, respectively.
The fair value of our cash-settled stock-based performance units is estimated using the Monte Carlo simulation method. Since these awards are settled in cash at the end of a defined performance period, they are classified as a liability and are re-measured quarterly until settlement. The fair value of our stock-settled stock-based performance units is estimated using the Monte Carlo simulation method at grant date only. Since these awards are settled in stock, they are classified as equity.
Our stock-based compensation expense is recognized based on management’s best estimate of the awards that are expected to vest, using the straight-line attribution method for all service-based awards with a graded vesting feature. If actual forfeiture results are different than expected, adjustments to recognized compensation expense may be required in future periods.
During the first quarter of 2017, we adopted the accounting standards update issued by the FASB in March 2016 pertaining to share-based payment transactions. As a result of this adoption, all cash payments for withheld shares made to taxing authorities on the employees' behalf are presented within the financing activities section instead of the operating activities section of the statement of cash flows. We elected the retrospective method for adoption of this update and the change in the statement of cash flows is not material for the years ended December 31, 2016 or 2015. Excess tax benefits were classified as an operating activity within the statement of cash flows on a prospective basis beginning in 2017; as such, prior periods were not adjusted. See Note 2 for additional discussion.
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


2. Accounting Standards
Not Yet Adopted
In May 2014 and August 2015, the FASB issued an update that supersedes the existing revenue recognition requirements. This standard includes a five-step revenue recognition model to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. Among other things, the standard requires enhanced disclosures about revenue, provides guidance for transactions that were not previously addressed comprehensively and improves guidance for multiple-element arrangements. This standard is effective for us in the first quarter of 2018 and shall be applied retrospectively to each prior reporting period presented (“full retrospective method”) or with the cumulative effect of initially applying the update recognized at the date of initial application (“modified retrospective method”). We will adopt this new standard in the first quarter of 2018 using the modified retrospective method. The adoption of this ASU will not have a material impact on our consolidated results of operations, financial position or cash flows. However, as a result of this standard we will change our presentation of marketing revenues and marketing expenses from the current gross presentation to a net presentation for a portion of our international contracts. For the years ended December 31, 2017 and 2016, we expect the impact of this change to be a reduction of approximately $130 million and $100 million, respectively, in marketing revenue and expenses in our consolidated results of operations. We will provide the disclosures required by this standard, such as key sources of revenues from transactions with customers, disaggregated revenue information, and significant accounting estimates and judgments, beginning in the first quarter of 2018.
In March 2017, the FASB issued a new accounting standards update that will change how employers that sponsor defined pension and/or other postretirement benefit plans present the net periodic benefit cost in the income statement. Employers will present the service cost component of net periodic benefit cost in the same income statement line item(s) as other employee compensation costs arising from services rendered during the period. Only the service cost component will be eligible for capitalization in assets. We will adopt this standard in the first quarter of 2018 on a retrospective basis, and will reclassify certain amounts from general and administrative expense to the exploration, production and our new other net periodic benefit costs expense categories on our consolidated statements of income.
In August 2016, the FASB issued a new accounting standards update which seeks to reduce the existing diversity in practice in how certain transactions are classified in the statement of cash flows. We will adopt this standard during the first quarter of 2018 on a retrospective basis with no significant impact on our consolidated results of operations, financial position or cash flows.
In November 2016, the FASB issued a new accounting standards update that requires entities to show the changes in the total of cash, cash equivalents and restricted cash in the statement of cash flows. As a result, entities will no longer present transfers between cash and cash equivalents and restricted cash in the statement of cash flows. When cash, cash equivalents, and restricted cash are presented in more than one line item on the balance sheet, the standard requires a reconciliation of the totals in the statement of cash flows to the related captions in the balance sheet. This reconciliation can be presented either on the face of the statement of cash flows or in the notes to the financial statements. We will adopt this standard in the first quarter of 2018 on a retrospective basis and do not expect the adoption of this standard to have a significant impact on our consolidated results of operations, financial position or cash flows.
In February 2017, the FASB issued a new accounting standards update that clarifies the accounting for the sale or transfer of nonfinancial assets and in substance nonfinancial assets to noncustomers, including partial sales. The standard also clarifies that the derecognition of all businesses (except those related to conveyances of oil and gas mineral rights or contracts with customers) should be accounted for in accordance with the derecognition and deconsolidation guidance in Subtopic 810-10. We will adopt this standard in the first quarter of 2018 using the modified retrospective approach with no material impact on our consolidated results of operations, financial position or cash flows.
In January 2017, the FASB issued a new accounting standards update that changes the definition of a business to assist entities with evaluating when a set of transferred assets and activities constitutes a business. The guidance requires an entity to evaluate if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets; if so, the set of transferred assets and activities would not represent a business. The guidance also requires a business to include at least one substantive process and narrows the definition of outputs by more closely aligning it with how outputs are described in the new revenue guidance. We will adopt this standard in the first quarter of 2018 on a prospective basis. Since we adopted the standard on a prospective basis, adoption of this standard will not have a significant impact on our consolidated results of operations, financial position or cash flows for prior periods.
In January 2016, the FASB issued an accounting standards update that addresses certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. We plan to adopt this standard in the first quarter of 2018
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


and do not expect the adoption of this standard to have a significant impact on our consolidated results of operations, financial position or cash flows.
In February 2016, the FASB issued a new lease accounting standard, which requires lessees to recognize most leases, including operating leases, on the balance sheet as a right of use asset and lease liability. Short-term leases can continue being accounted for off balance sheet based on a policy election. This standard does not apply to leases to explore for or use minerals, oil, natural gas and similar non-regenerative resources, including the intangible right to explore for those natural resources and rights to use the land in which those natural resources are contained. This standard is effective for us in the first quarter of 2019 and shall be applied using a modified retrospective approach at the beginning of the earliest period presented in the financial statements. Early adoption is permitted. While we will have to recognize a right of use asset and lease liability on the adoption date, we continue to evaluate the provisions of this accounting standards update and assessing the effects it will have on our consolidated results of operations, financial position or cash flows.
In August 2017, the FASB issued a new accounting standards update that amends the hedge accounting model to enable entities to hedge certain financial and nonfinancial risk attributes previously not allowed. The amendment also reduces the overall complexity of documenting, assessing and measuring hedge effectiveness. This standard is effective for us in the first quarter of 2019. Early adoption is permitted in any interim or annual period. The amendment mandates modified retrospective adoption when accounting for hedge relationships in effect as of the adoption date. We are evaluating the provisions of this accounting standards update, including transition requirements, and are assessing the impact it may have on our results of operations, financial position, or cash flows.
In January 2017, the FASB issued a new accounting standards update that eliminates the requirement to calculate the implied fair value of the goodwill (i.e., Step 2 of goodwill impairment test under the current guidance) to measure a goodwill impairment charge. The standard will require entities to record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value (i.e., measure the charge based on Step 1 under the current guidance). This standard is effective for us in the first quarter of 2020 and shall be applied on a prospective basis. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Since we will adopt the standard on a prospective basis, we do not expect an impact on our consolidated results of operations, financial position or cash flows for prior periods.instruments – credit losses
In June 2016, the FASB issued a new accounting standards update that changes the impairment model for trade receivables, net investments in leases, debt securities, loans and certain other instruments. The standard requires the use of a forward-looking “expected loss” model as opposed to the current “incurred loss” model. This standard is effective for us in the first quarter of 2020 and will be adopted on a modified retrospective basis through a cumulative-effect adjustment to retained earnings as of the beginning of the adoption period. EarlyThe adoption is permitted starting January 2019. We are evaluating the provisions of this accounting standards update and assessing thestandard did not result in a material impact if any, it may have on our consolidated results of operations, financial position orand cash flows.
Recently Adopted
Lease accounting standard
In MarchFebruary 2016, the FASB issued a new leasing accounting standard, which modified the definition of a lease and established comprehensive accounting and financial reporting requirements for leasing arrangements. It requires lessees to recognize a lease liability and a right-of-use (“ROU”) asset for all leases, including operating leases, with a term of greater than 12 months on the balance sheet. On January 1, 2019, we adopted the new lease accounting standard using the modified retrospective method and applied to all leases that existed as of that date. It does not apply to leases to explore for or use minerals, oil, natural gas and similar non-regenerative resources, including the intangible right to explore for those natural resources and rights to use the land in which those natural resources are contained. As a result of the adoption, we recorded a cumulative-effect adjustment to stockholders’ equity of $31 million. We continue presenting all prior comparative periods without any restatements. See Note 13for further information.

59

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


Hedge accounting standard
In August 2017, the FASB issued a new accounting standards update that changes several aspectsamends the hedge accounting model to enable entities to hedge certain financial and nonfinancial risk attributes previously not allowed. The amendment also reduces the overall complexity of accounting for share-based payment transactions, including a requirement to recognize all excess tax benefitsdocumenting, assessing and tax deficiencies as income tax expense or benefit in the income statement, classification of awards as either equity or liabilities, and classification on the statement of cash flows.measuring hedge effectiveness. This standard was effective for us in the first quarter of 2017. The new standard requires a company to make a policy election on how it accounts for forfeitures; we elected to continue estimating forfeitures using the same methodology practiced prior to adoption of this standard. See Note 1 for the impact this standard has on the presentation of our financial statements.
In July 2015, the FASB issued an update that requires an entity to measure inventory at the lower of cost or net realizable value. This excludes inventory measured using LIFO or the retail inventory method. This standard was effective for us in the first quarter of 2017, and was applied prospectively.2019. Adoption of this standard did not have a significant impact on our consolidated results of operations, financial position or cash flows.

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


3.    Income (Loss)(loss) and Dividends per Common Share
Basic income (loss) per share is based on the weighted average number of common shares outstanding. Diluted income (loss) per share assumes exercise of stock options in all years,periods, provided the effect is not antidilutive. The per share calculations below exclude 11$6 million, 13$6 million and 1311 million stock options in 2017, 20162019, 2018 and 20152017 that were antidilutive.
 Year Ended December 31,
(In millions, except per share data)2019 2018 2017
Income (loss) from continuing operations$480
 $1,096
 $(830)
Loss from discontinued operations
 
 (4,893)
Net income (loss)$480
 $1,096
 $(5,723)
      
Weighted average common shares outstanding810
 846
 850
Effect of dilutive securities
 1
 
Weighted average common shares, diluted810
 847
 850
Per basic share: 
  
  
Income (loss) from continuing operations$0.59
 $1.30
 $(0.97)
Loss from discontinued operations$
 $
 $(5.76)
Net income (loss)$0.59
 $1.30
 $(6.73)
Per diluted share:     
Income (loss) from continuing operations$0.59
 $1.29
 $(0.97)
Loss from discontinued operations$
 $
 $(5.76)
Net income (loss)$0.59
 $1.29
 $(6.73)
Dividends per share$0.20
 $0.20
 $0.20
 Year Ended December 31,
(In millions, except per share data)2017 2016 2015
Income (loss) from continuing operations$(830) $(2,087) $(1,701)
Income (loss) from discontinued operations(4,893) (53) (503)
Net income (loss)$(5,723) $(2,140) $(2,204)
      
Weighted average common shares outstanding850
 819
 677
Per basic share: 
  
  
Income (loss) from continuing operations$(0.97) $(2.55) $(2.51)
Income (loss) from discontinued operations$(5.76) $(0.06) $(0.75)
Net income (loss)$(6.73) $(2.61) $(3.26)
Per diluted share:     
Income (loss) from continuing operations$(0.97) $(2.55) $(2.51)
Income (loss) from discontinued operations$(5.76) $(0.06) $(0.75)
Net income (loss)$(6.73) $(2.61) $(3.26)


4. Acquisitions
2017 - 2019 – United States E&P Segment
In the fourth quarter of 2019, we acquired approximately 40,000 net acres in a Texas Delaware oil play in West Texas from multiple sellers for $106 million. We accounted for these transactions as an asset acquisition, allocating the purchase price to unproved property within property, plant and equipment.
During the fourth quarter of 2019, we acquired a 100% working interest in approximately 18,000 net acres in the Eagle Ford from Rocky Creek Resources, LLC and RCR Midstream, LLC for $191 million in cash, subject to post-closing adjustments. We accounted for this transaction as a business combination, with the entire purchase price allocated between proved property, unproved property, and other assets, all within property, plant and equipment.
The fair values of the assets acquired were measured using the market approach, specifically the market comparable technique. The fair values were based on market-corroborated inputs, which were derived from observable market data; such inputs represent Level 2 inputs. As the acquisition date was December 31, 2019, there is not a pro forma effect of this transaction on our consolidated statement of income.

60

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


2017 – United States Segment
In the fourth quarter of 2017, we closed on our acquisition of additional acreage in the Northern Delaware basin of New Mexico from a private seller for $63 million in cash subject to post-closing adjustments. Weand accounted for this transaction as an asset acquisition, allocating the purchase price to unproved property within property, plant and equipment.
In the second quarter of 2017, we closed on our2 acquisitions ofwhich included approximately 91,000 net acres in the Permian basin including over 70,000 net acres in the Northern Delaware basin of New Mexico. On May 1, 2017, we closed on ourThe first acquisition with BC Operating, Inc. and other entities closed for approximately $1.1 billion in cash subject to post-closing adjustments, to acquire approximately 70,000 net surface acres and current production of approximately 5,000 net barrels of oil equivalent per day. On June 1, 2017, we closed on ourthe second acquisition with Black Mountain Oil & Gas and other private sellers closed for approximately $700 million in cash, subject to post-closing adjustments, to acquire approximately 21,000 net surface acres. The purchase price for thesecash. These acquisitions waswere paid with cash on hand. Wehand and accounted for these transactions as asset acquisitions, with substantially all of the purchase price allocated to unproved property within property, plant and equipment.
2016 -
5. Dispositions
United States E&PSegment
On August 1, 2016,In the third quarter of 2018, we closed on our acquisitionthe sale of PayRock Energy Holdings, LLC (“PayRock”), a portfolio company of EnCap Investments, including approximately 61,000 net surface acresnon-core, non-operated conventional properties, primarily in the oil windowGulf of Mexico, for combined net proceeds of $16 million, before closing adjustments. A pre-tax gain of $32 million was recognized in the third quarter of 2018.
International Segment
On July 1, 2019, we closed on the sale of our U.K. business (Marathon Oil U.K. LLC and Marathon Oil West of Shetlands Limited), for proceeds of $95 million which reflects the assumption by RockRose Energy PLC (“RockRose”) of the Anadarko Basin STACK playU.K. business’ working capital and cash equivalent balances of approximately $345 million on December 31, 2018. During the third quarter of 2019, we recorded a $6 million liability and corresponding expense related to the estimated fair value of our exposure to surety bonds we continued to hold that guaranteed decommissioning liabilities of Marathon Oil U.K. LLC. In November 2019, RockRose posted replacement security and accordingly, we reversed the aforementioned $6 million (see Note 25 for further detail). Income before taxes relating to our U.K. business for the year ended December 31, 2019 and 2018, was $33 million and $261 million, respectively. See Note 12 and Note 19 for additional details on U.K. ARO and the defined benefit pension plan as it relates to this disposition.
In the second quarter of 2019, we closed on the sale of our 15% non-operated interest in Oklahoma. The purchase pricethe Atrush block in Kurdistan for proceeds of $904$63 million, subjectbefore closing adjustments. This property was classified as held for sale in the consolidated balance sheet at December 31, 2018, with total assets of $58 million and total liabilities of $17 million.
In the first quarter of 2018, we closed on the sale of our subsidiary, Marathon Oil Libya Limited, which held our 16.33% non-operated interest in the Waha concessions in Libya, to a subsidiary of Total S.A. (Elf Aquitaine SAS) for proceeds of approximately $450 million, excluding closing adjustments, was paid with cash on hand. We accounted for this transaction as an asset acquisition, withand recognized a majoritypre-tax gain of the purchase price allocated to unproved property within property, plant and equipment.$255 million.

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


5. Dispositions
Oil Sands Mining SegmentCanadian Business – Discontinued Operations
On May 31, 2017 we closed on the sale of our Canadian business, which included our 20% non-operated interest in the AOSP to Shell and Canadian Natural Resources Limited (“CNRL”) for $2.5 billion, excluding closing adjustments. Under the terms of the agreement, $1.8 billion was paid to us upon closing and the remaining proceeds will be paid in the first quarter of 2018.closing. At closing we received two notes receivable for a combined $750 million for the remaining proceeds, each with a face valuewhich was received in the first quarter of $375 million. We recorded these notes receivable at fair value, see Note 14 for fair value measurements. Our notes receivable are with 10084751 Canada Limited (“Canada Limited”), an affiliate of Shell Canada Limited, and CNRL. The Canada Limited note receivable is guaranteed by Shell Canada Limited and the CNRL note receivable is guaranteed by Toronto Dominion Bank.2018. In the first quarter of 2017, we recorded an after-taxa non-cash impairment charge of $6.6 billion (after-tax of $4.96 billionbillion) primarily related to the property, plant and equipment of our Canadian business. This impairment was recorded for excess net book value over anticipated sales proceeds less costs to sell. Fair values of assets held for sale were determined based upon the anticipated sales proceeds less costs to sell, which resulted in a level 2 classification. As the effective date of the transaction was January 1, 2017, we recorded a loss on sale of $43 million during the second quarter of 2017 due to second quarter results of operations from our Canadian business that were recorded in our financial statements but transferred to the buyer upon closing.
Our Canadian business is reflected as discontinued operations in the consolidated statements of income and the consolidated statements of cash flows for all periods presented. The following table contains select amounts reported in our historical consolidated statements of income and consolidated statements of cash flows as discontinued operations:

61

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

  Year Ended December 31,
(In millions) 2017
Total revenue and other income $431
Net loss on disposal of assets (43)
Total revenues and other income 388
Costs and expenses:  
Production 254
Depreciation, depletion and amortization 40
Impairments 6,636
Other 25
Total costs and expenses 6,955
Pretax loss from discontinued operations (6,567)
Benefit for income taxes (1,674)
Loss from discontinued operations $(4,893)
  Year Ended December 31,
(In millions) 2017
Cash flow from discontinued operations:  
Operating activities $141
Investing activities (13)
Changes in cash included in current assets held for sale 2
Net increase in cash and cash equivalents of discontinued operations $130

6. Revenues
The majority of our revenues are derived from the sale of crude oil and condensate, NGLs and natural gas under spot and term agreements with our customers in the United States and various international locations.
The following tables present our revenues from contracts with customers disaggregated by product type and geographic areas.
United States
  Year Ended December 31,
(In millions) 2017 2016 2015
Total sales and other revenues and other income $431
 $863
 $908
Net gain (loss) on disposal of assets (43) 
 
Total revenues and other income 388
 863
 908
Costs and expenses:      
Production expenses 254
 601
 715
Exploration expenses 
 7
 347
Depreciation, depletion and amortization 40
 239
 236
Impairments 6,636
 
 31
Other 25
 87
 98
Total costs and expenses 6,955
 934
 1,427
Pretax income (loss) from discontinued operations (6,567) (71) (519)
Provision (benefit) for income taxes (1,674) (18) (16)
Income (loss) from discontinued operations $(4,893) $(53) $(503)
 Year Ended December 31, 2019
(In millions)Eagle Ford Bakken Oklahoma Northern Delaware Other U.S. Total
Crude oil and condensate$1,358
 $1,686
 $425
 $316
 $102
 $3,887
Natural gas liquids114
 46
 116
 26
 5
 307
Natural gas121
 39
 156
 16
 17
 349
Other7
 
 
 
 52
 59
Revenues from contracts with customers$1,600
 $1,771
 $697
 $358
 $176
 $4,602
 Year Ended December 31, 2018
(In millions)Eagle Ford Bakken Oklahoma Northern Delaware Other U.S. Total
Crude oil and condensate$1,554
 $1,568
 $426
 $235
 $164
 $3,947
Natural gas liquids205
 62
 181
 38
 9
 495
Natural gas145
 38
 184
 20
 26
 413
Other8
 
 
 
 23
 31
Revenues from contracts with customers$1,912
 $1,668
 $791
 $293
 $222
 $4,886

62

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

International
 Year Ended December 31, 2019
(In millions)E.G. U.K. Other International Total
Crude oil and condensate$271
 $107
 $20
 $398
Natural gas liquids4
 1
 
 5
Natural gas32
 12
 
 44
Other
 14
 
 14
Revenues from contracts with customers$307
 $134
 $20
 $461
 Year Ended December 31, 2018
(In millions)E.G. U.K. Libya Other International Total
Crude oil and condensate$342
 $282
 $187
 $77
 $888
Natural gas liquids4
 5
 
 
 9
Natural gas37
 40
 9
 
 86
Other1
 32
 
 
 33
Revenues from contracts with customers$384
 $359
 $196
 $77
 $1,016
In 2019, sales to Marathon Petroleum Corporation, Flint Hills Resources, Valero Marketing and Supply, and Shell Trading and each of their respective affiliates, accounted for approximately 13%, 13%, 11%, and 10%, respectively, of our total revenues. In 2018, sales to Valero Marketing and Supply and Flint Hills Resources and their respective affiliates, each accounted for approximately 11% of our total revenues. In 2017, sales to Vitol and their respective affiliates accounted for approximately 10% of our total revenues.
The pricing in our hydrocarbon sales agreements are variable, determined using various published benchmarks which are adjusted for negotiated quality and location differentials. As a result, revenue collected under our agreements with customers is highly dependent on the market conditions and may fluctuate considerably as the hydrocarbon market prices rise or fall. Typically, our customers pay us monthly, within a short period of time after we deliver the hydrocarbon products. As such, we do not have any financing element associated with our contracts. We do not have any issues related to returns or refunds, as product specifications are standardized for the industry and are typically measured when transferred to a common carrier or midstream entity, and other contractual mechanisms (e.g., price adjustments) are used when products do not meet those specifications.
In limited cases, we may also collect advance payments from customers as stipulated in our agreements; payments in excess of recognized revenue are recorded as contract liabilities on our consolidated balance sheet.
Under our hydrocarbon sales agreements, the entire consideration amount is variable either due to pricing and/or volumes. We recognize revenue in the amount of variable consideration allocated to distinct units of hydrocarbons transferred to a customer. Such allocation reflects the amount of total consideration we expect to collect for completed deliveries of hydrocarbons and the terms of variable payment relate specifically to our efforts to satisfy the performance obligations under these contracts. Our performance obligations under our hydrocarbon sales agreements are to deliver either the entire production from the dedicated wells or specified contractual volumes of hydrocarbons.
We often serve as the operator for jointly owned oil and gas properties. As part of this role, we perform activities to explore, develop and produce oil and gas properties in accordance with the joint operating arrangements. Other working interest owners reimburse us for costs incurred based on our agreements. We determined that these activities are not performed as part of customer relationships and such reimbursements will continue to not be recorded as revenues within the scope of the revenue accounting standard.
In addition, we commonly market the share of production belonging to other working interest owners as the operator of jointly owned oil and gas properties. We concluded that those marketing activities are carried out as part of the collaborative arrangement. Therefore, we act as a principal only in regards to the sale of our share of production and recognize revenue for the volumes associated with our net production.


63

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

Crude oil and condensate
For the crude sales agreements, we satisfy our performance obligations and recognize revenue once customers take control of the crude at the designated delivery points, which include pipelines, trucks or vessels.
Natural gas and NGLs
When selling natural gas and NGLs, we engage midstream entities to process our production stream by separating natural gas from the NGLs. Frequently, these midstream entities also purchase our natural gas and NGLs under the same agreements. In these situations, we determined the performance obligation is complete and satisfied at the tailgate of the processing plant when the natural gas and NGLs become identifiable and measurable products. We determined the plant tailgate is the point in time where control is transferred to midstream entities and they are entitled to significant risks and rewards of ownership of the natural gas and NGLs.
The amounts due to midstream entities for gathering and processing services are recognized as shipping and handling cost, since we make those payments in exchange for distinct services. Under some of our natural gas processing agreements, we have an option to take the processed natural gas and NGLs in-kind and sell to customers other than the processing company. In those circumstances, our performance obligations are complete after delivering the processed hydrocarbons to the customer at the designated delivery points, which may be the tailgate of the processing plant or an alternative delivery point requested by the customer.
We have “percentage-of-proceeds” arrangements with some midstream entities where they retain a percentage of the proceeds collected for selling our processed natural gas and NGLs as compensation for their processing and marketing services. We recognize revenue for the gross sales volumes and recognize the proceeds retained by midstream companies as shipping and handling cost.
Contract receivables and liabilities
The following table provides information about receivables and contract assets (liabilities) from contracts with customers.
 December 31,
(In millions)20192018
Receivables from contracts with customers, included in receivables, less reserves$837
$714
Contract asset (liability)$
$(1)

The contract liability balance on January 1, 2019 relates to the advance consideration received from customers for crude oil sales and processing services in the U.K. Subsequent to the sale of our U.K. business, we no longer hold this contract liability.
Changes in the contract asset (liability) balance during the period are as follows.
(In millions)Year Ended December 31, 2019
Contract asset (liability) balance as of January 1, 2019$(1)
Revenue recognized as performance obligations are satisfied74
Amounts invoiced to customers(52)
Contract asset (liability) transferred to buyer(a)
(21)
Contract asset (liability) balance as of December 31, 2019$
(a)
Refer to Note 5 for further information on the sale of our U.K. business.

64

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements



The following table presents the carrying value of the major categories of assets and liabilities of our Canadian business reported as discontinued operations and other non-core international assets and liabilities from continuing operations, that are reflected as held for sale on our consolidated balance sheets at December 31, 2017 and December 31, 2016:
  December 31, December 31,
(In millions) 2017 2016
Assets held for sale    
Current assets:    
Cash and cash equivalents $
 $2
Accounts receivables 
 129
Inventories 
 91
Other 
 4
Total current assets held for sale—discontinued operations 
 226
Total current assets held for sale—continuing operations 11
 1
Total current assets held for sale $11
 $227
     
Noncurrent assets:    
Property, plant and equipment, net $
 $8,991
Other 
 106
Total noncurrent assets held for sale—discontinued operations 
 9,097
Total noncurrent assets held for sale—continuing operations 55
 1
Total noncurrent assets held for sale $55
 $9,098
     
Liabilities associated with assets held for sale    
Current liabilities:    
Accounts payable $
 $111
Other 
 10
Total current liabilities held for sale—discontinued operations 
 121
Total current liabilities held for sale—continuing operations 
 
Total current liabilities held for sale $
 $121
     
Noncurrent liabilities:    
Asset retirement obligations $
 $95
Deferred tax liabilities 
 1,669
Other 
 20
Total noncurrent liabilities held for sale—discontinued operations 
 1,784
Total noncurrent liabilities held for sale—continuing operations 2
 7
Total noncurrent liabilities held for sale $2
 $1,791
United States E&P Segment
As disclosed above, we closed on the sale of our Canadian business in May of 2017. This sale included interests in our exploration stage in-situ leases which were included within our historically named North America E&P Segment. See Note 6 for further detail on our segments. These interests have been reflected as discontinued operations and are included within the disclosure above.
In July 2017, we entered into an agreement to sell certain conventional assets in Oklahoma. We closed on the sale in September 2017 for proceeds of $25 million, and recognized a pre-tax gain of $21 million.
In September 2016, we entered into an agreement to sell certain non-operated CO2 and waterflood assets in West Texas and New Mexico. The sale closed in late October for proceeds of $235 million, and we recognized a total pre-tax gain of $63
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


million. During the third quarter 2016, we sold certain non-operated assets primarily in West Texas and New Mexico to multiple purchasers for combined proceeds of approximately $67 million, and recognized a total pre-tax gain of $55 million.
In April 2016, we announced the sale of our Wyoming upstream and midstream assets. During the second quarter, we received proceeds of approximately $690 million and recorded a pre-tax gain of $266 million with the remaining asset sales closing in November 2016 for proceeds of $155 million, excluding closing adjustments. A pre-tax gain of $38 million was recognized in the fourth quarter 2016.
In March and April 2016, we entered into separate agreements to sell our 10% working interest in the outside-operated Shenandoah discovery in the Gulf of Mexico, operated natural gas assets in the Piceance basin in Colorado and certain undeveloped acreage in West Texas for a combined total of approximately $80 million in proceeds. We closed on certain of the asset sales and recognized a net pre-tax loss on sale of $48 million in 2016, the remaining asset closed in 2017 with a net pre-tax gain on sale of $32 million.
In November 2015, we entered into an agreement to sell our operated producing properties in the greater Ewing Bank area and non-operated producing interests in the Petronius and Neptune fields in the Gulf of Mexico. The transaction closed in December 2015, excluding the Neptune field, for proceeds of $111 million. A $228 million pretax gain was recorded in the fourth quarter of 2015. The Neptune field transaction closed during the first quarter of 2016 for cash proceeds of $4 million.
In August 2015, we closed the sale of our East Texas, North Louisiana and Wilburton, Oklahoma natural gas assets for proceeds of $100 million and recorded a pretax loss of $1 million. During the second quarter of 2015, we recorded a non-cash impairment charge of $44 million related to these assets (see Note 14).
International E&P Segment
In the third quarter of 2017, we entered into separate agreements to sell certain non-core properties in our International E&P segment for combined proceeds of $53 million, before closing adjustments. We closed on one of the asset sales in the second half of 2017 and recognized no net pre-tax gain or loss on sale. The remaining asset sale is expected to close during 2018 and is classified as held for sale in the consolidated balance sheet as of December 31, 2017, with total assets of $66 million and total liabilities of $2 million. See Note 10 for further detail on impairment expenses recognized concurrently with these agreements.
In the third quarter of 2015, we entered into agreements to sell our East Africa exploration acreage in Ethiopia and Kenya. A pretax loss of $109 million was recorded in the third quarter of 2015. This transaction closed during the first quarter of 2016.


MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


6.7. Segment Information
We have two2 reportable operating segments. EachBoth of these segments isare organized and managed based upon both geographic location and the nature of the products and services it offers.offered.
United States E&P ("(“U.S. E&P") – explores for, produces and markets crude oil and condensate, NGLs and natural gas in the United States
International E&P ("Int'l E&P"(“Int’l”) – explores for, produces and markets crude oil and condensate, NGLs and natural gas outside of the United States andas well as produces and markets products manufactured from natural gas, such as LNG and methanol, in E.G.
Information regarding assets by segment is not presented because it is not reviewed by the chief operating decision maker (“CODM”).  Segment income (loss) represents income (loss) which excludes certain items not allocated to our operating segments, net of income taxes, attributable to the operating segments.taxes. A portion of our corporate and operations support general and administrative support costs are not allocated to the operating segments. These unallocated costs primarily consist of employment costs (including pension effects), professional services, facilities and other costs associated with corporate and operations support activities. Additionally, items which affect comparability such asas: gains or losses on dispositions, certain property impairments, change in tax expense associated withcertain exploration expenses relating to a tax rate change, changes in our valuation allowance,strategic decision to exit conventional exploration, unrealized gains or losses on commodity derivative instruments, pension settlement losses or other items (as determined by the CODM) are not allocated to operating segments.
As discussed in Note 5 we closed on, the sale of our Canadian business which includes our Oil Sands Mining segment and exploration stage in-situ leases, in the second quarter of 2017. The Canadian business2017 is reflected as discontinued operations and is excluded from segment information in all periods presented. Additionally, we renamed our North America E&P segment to United States E&P segment effective June 30, 2017 in all periods presented. See Note 1 for further information.
 Year Ended December 31, 2019
(In millions)U.S. Int’l Not Allocated to Segments Total
Revenues from contracts with customers$4,602
 $461
 $
 $5,063
Net gain (loss) on commodity derivatives52
 
 (124)
(b) 
(72)
Income from equity method investments
 87
 
 87
Net gain on disposal of assets
 
 50
(c) 
50
Other income13
 9
 40
 62
Less costs and expenses:       
Production588
 126
 (2) 712
Shipping, handling and other operating561
 26
 18
 605
Exploration149
 
 
 149
Depreciation, depletion and amortization2,250
 121
 26
 2,397
Impairments
 
 24
(d) 
24
Taxes other than income311
 
 
 311
General and administrative127
 25
 204
 356
Net interest and other
 
 244
 244
Other net periodic benefit costs
 (3) 
(e) 
(3)
Loss on early extinguishment of debt
 
 3
 3
Income tax provision (benefit)6
 29
 (123) (88)
Segment income (loss)$675
 $233
 $(428) $480
Total assets$17,781
 $1,530
 $934
 $20,245
Capital expenditures(a)
$2,550
 $16
 $25
 $2,591
Year Ended December 31, 2017 Not Allocated  
(In millions)U.S. E&P Int'l E&P to Segments Total
Sales and other operating revenues$3,138
 $1,154
 $(81)
(b) 
$4,211
Marketing revenues29
 133
 
 162
Total revenues3,167
 1,287
 (81) 4,373
Income from equity method investments
 256
 
 256
Net gain on disposal of assets and other income13
 6
 117
(c) 
136
Less:       
Production expenses476
 229
 1
 706
Marketing costs36
 132
 
 168
Other operating354
 77
 
 431
Exploration154
 5
 250
(d) 
409
Depreciation, depletion and amortization2,011
 328
 33
 2,372
Impairments4
 
 225
(e) 
229
Taxes other than income173
 
 10
 183
General and administrative119
 32
 249
(f) 
400
Net interest and other
 
 270
(g) 
270
Loss on early extinguishment of debt
 
 51
(h) 
51
Income tax provision (benefit)1
 372
 3
 376
Segment income (loss) / Income (loss) from continuing operations$(148) $374
 $(1,056) $(830)
Capital expenditures (a)
$2,081
 $42
 $27
 $2,150

(a) 
Includes accruals.accruals and excludes acquisitions.
(b) 
Unrealized loss on commodity derivative instruments.instruments (see Note 15).
(c) 
Primarily related to the sale of our working interest in the Droshky field (Gulf of Mexico) and the sale of our U.K. business (see Note 5).
(d)
Primarily a result of anticipated sales of non-core proved properties in our International and United States segments (see Note 11).
(e)
Includes pension settlement loss of $12 million (see Note 19).



65

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

 Year Ended December 31, 2018
(In millions)U.S. Int’l Not Allocated to Segments Total
Revenues from contracts with customers$4,886
 $1,016
 $
 $5,902
Net gain (loss) on commodity derivatives(281) 
 267
(b) 
(14)
Income from equity method investments
 225
 
 225
Net gain on disposal of assets
 
 319
(c) 
319
Other income16
 12
 122
(d) 
150
Less costs and expenses:       
Production625
 215
 2
 842
Shipping, handling and other operating499
 70
 6
 575
Exploration246
 3
 40
(e) 
289
Depreciation, depletion and amortization2,217
 197
 27
 2,441
Impairments
 
 75
(f) 
75
Taxes other than income301
 
 (2) 299
General and administrative146
 32
 216
 394
Net interest and other
 
 226
 226
Other net periodic benefit costs
 (9) 23
(g) 
14
Income tax provision (benefit)(21) 272
 80

331
Segment income$608
 $473
 $15
 $1,096
Total assets$17,321
 $2,083
 $1,917
 $21,321
Capital expenditures(a)
$2,620
 $39
 $26
 $2,685

(a)
Includes accruals and excludes acquisitions.
(b)
Unrealized gain on commodity derivative instruments (seeNote 15).
(c)
Primarily related to the gain on sale of our Libya subsidiary(see Note 5).
(d)
Primarily a reduction of asset retirement obligations in our International segment (see Note 12).
(e)
Primarily related to dry well expense and unproved property impairments associated with the Rodo well in Alba Block Sub Area B, offshore E.G. (see Note 10).
(f)
Due to the anticipated sales of certain non-core proved properties in our International and United States segments (see Note 11).
(g)
Includes pension settlement loss of $21 million (see Note 19).


66

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


Year Ended December 31, 2017
(In millions)U.S. Int’l Not Allocated to Segments Total
Revenues from contracts with customers$3,093
 $1,154
 $
 $4,247
Net gain (loss) on commodity derivatives45
 
 (81)
(b) 
(36)
Marketing revenues29
 133
 
 162
Income from equity method investments
 256
 
 256
Net gain on disposal of assets1
 
 57
(c) 
58
Other income12
 6
 60
 78
Less costs and expenses:       
Production476
 239
 1
 716
Marketing costs36
 132
 
 168
Shipping, handling and other operating354
 77
 
 431
Exploration154
 5
 250
(d) 
409
Depreciation, depletion and amortization2,011
 328
 33
 2,372
Impairments4
 
 225
(e) 
229
Taxes other than income173
 
 10
 183
General and administrative119
 30
 222
 371
Net interest and other
 
 270
(f) 
270
Other net periodic benefit costs
 (8) 27
(g) 
19
Loss on early extinguishment of debt
 
 51
(h) 
51
Income tax provision1
 372
 3
 376
Segment income (loss)$(148) $374
 $(1,056) $(830)
Total assets$16,863
 $4,201
 $948
 $22,012
Capital expenditures(a)
$2,081
 $42
 $27
 $2,150

(a)
Includes accruals and excludes acquisitions.
(b)
Unrealized loss on commodity derivative instruments (seeNote 15).
(c)
Primarily related to the sale of certain conventional assets in Oklahoma and Colorado. (See Colorado(see Note 5)5).
(d) Primarily related to unproved property impairments associated with certain non-core properties within our International E&P segment. (See Note 10).
(d)
Primarily related to unproved property impairments associated with certain non-core properties within our International segment (see Note 11).
(e) 
Primarily related to proved property impairments associated with certain non-core properties within our International E&P segment. (See segment (see Note 10)11).
(f)  
Includes a gain of $46 million resulting from the termination of our forward starting interest rate swaps (seeNote 15).
(g)
Includes pension settlement loss of $32 million (see Note 17)19).
(g) Includes a gain of $47 million resulting from the termination of our forward starting interest rate swaps. (See Note 13.)
(h) Primarily related to the make-whole call provisions paid upon redemption of our senior unsecured notes. (See Note 15.)



MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


Year Ended December 31, 2016 Not Allocated  
(In millions)U.S. E&P Int'l E&P to Segments Total
Sales and other operating revenues$2,375
 $665
 $(110)
(b) 
$2,930
Marketing revenues135
 105
 
 240
Total revenues2,510
 770
 (110) 3,170
Income (loss) from equity method investments
 175
 
 175
Net gain on disposal of assets and other income28
 32
 382
(c) 
442
Less:       
Production expenses486
 226
 
 712
Marketing costs142
 103
 
 245
Other operating328
 43
 113
(d) 
484
Exploration127
 17
 179
(e) 
323
Depreciation, depletion and amortization1,835
 276
 45
 2,156
Impairments20
 
 47
(f) 
67
Taxes other than income149
 
 2
 151
General and administrative94
 35
 352
(g) 
481
Net interest and other
 
 332
 332
Income tax provision (benefit)(228) 49
 1,102
(h) 
923
Segment income (loss) / Income (loss) from continuing operations$(415) $228
 $(1,900) $(2,087)
Capital expenditures (a)
$936
 $82
 $18
 $1,036
(a)
Includes accruals.
(b)
Unrealized loss on commodity derivative instruments.
(c)
Primarily related to net gain on disposal of assets(see Note 5).
(d)
Includes termination payment on our Gulf of Mexico deepwater drilling rig commitment of $113 million.
(e) Primarily related to impairments associated with decision to not drill remaining Gulf of Mexico undeveloped leases (See Note 10).
(f)
Proved property impairments (see Note 10).
(g)
Includes pension settlement loss of $103 million and severance related expenses associated with workforce reductions of $8 million (see Note 17).
(h) 
Increased valuation allowance on certain of our deferred tax assets $1,346 million (see Note 7).

Year Ended December 31, 2015 Not Allocated  
(In millions)U.S. E&P Int'l E&P to Segments Total
Sales and other operating revenues$3,358
 $728
 $50
(b) 
$4,136
Marketing revenues396
 103
 
 499
Total revenues3,754
 831
 50
 4,635
Income from equity method investments
 157
 (12)
(c) 
145
Net gain on disposal of assets and other income24
 27
 122
(d) 
173
Less:       
Production expenses724
 255
 
 979
Marketing costs401
 99
 
 500
Other operating335
 48
 27
 410
Exploration314
 101
 556
(e) 
971
Depreciation, depletion and amortization2,377
 295
 49
 2,721
Impairments2
 
 719
(f) 
721
Taxes other than income215
 
 1
 216
General and administrative127
 44
 417
(g) 
588
Net interest and other
 
 286
 286
Income tax provision (benefit)(265) 61
 (534) (738)
Segment income (loss) / Income (loss) from continuing operations$(452) $112
 $(1,361) $(1,701)
Capital expenditures (a)
$2,553
 $368
 $25
 $2,946
(a)
Includes accruals.
(b)
Unrealized gain on commodity derivative instruments.
(c)
Partial impairment of investment in equity method investee (See Note 14).
(d)
Primarily related to gain on salethe make-whole call provisions paid upon redemption of our properties and interests in the Gulf of Mexico, partially offset by the loss on sale of East Africa exploration acreage(see senior unsecured notes (see Note 5)17).
(e) Unproved property impairments associated with lower forecasted commodity prices and change in conventional exploration strategy (See Note 10).
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


(f)
Includes goodwill impairment (see Note 12) and proved property impairments (see Note 10).
(g)
Includes pension settlement loss of $119 million (see Note 17) and severance related expenses associated with workforce reductions of $55 million.

Revenues from external customers are attributed to geographic areas based upon selling location. The following summarizes revenues from external customers by geographic area.
 Year Ended December 31,
(In millions)2017 2016 2015
United States$3,086
 $2,400
 $3,804
Equatorial Guinea530
 444
 444
Libya431
 54
 
U.K.289
 263
 380
Other international37
 9
 7
Total revenues$4,373
 $3,170
 $4,635
In 2017, sales to Vitol and each of their respective affiliates accounted for approximately 10% of our total revenues. In 2016, sales to Valero Marketing and Supply, Tesoro Petroleum, and Flint Hills Resources and each of their respective affiliates accounted for approximately 13%, 11% and 10% of our total revenues. In 2015, sales to Shell Oil and its affiliates accounted for approximately 10% of our total revenues.
The following summarizes revenues by product line.
 Year Ended December 31,
(In millions)2017 2016 2015
Crude oil and condensate$3,477
 $2,605
 $3,963
Natural gas liquids338
 198
 203
Natural gas510
 356
 464
Other48
 11
 5
Total revenues$4,373
 $3,170
 $4,635


The following summarizes property, plant and equipment and equity method investments.
 December 31,
(In millions)2019 2018
United States$16,507
 $16,094
Equatorial Guinea1,156
 1,333
Other international(a)

 122
Total long-lived assets$17,663
 $17,549

(a)
The decrease in 2019 is due to the sale of our non-operated interest in the Atrush block in Kurdistan and the sale of our U.K. business (see Note 5).

67
 December 31,
(In millions)2017 2016
United States$15,971
 $14,272
Equatorial Guinea1,582
 1,794
Other international959
 1,592
Total long-lived assets$18,512
 $17,658


7. Income Taxes
Income (loss) before tax expense for continuing operations was:
 Year Ended December 31,
(In millions) 2017 2016 2015
United States $(783) $(1,449) $(2,384)
Foreign 329
 285
 (55)
Total $(454) $(1,164) $(2,439)

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements



8. Income Taxes
Income (loss) from continuing operations before income taxes were:
 Year Ended December 31,
(In millions) 2019 2018 2017
United States $43
 $642
 $(783)
Foreign 349
 785
 329
Total $392
 $1,427
 $(454)


Income tax provisions (benefits) for continuing operations were:
 Year Ended December 31,
 2019 2018 2017
(In millions)Current Deferred Total Current Deferred Total Current Deferred Total
Federal$(116) $(3) $(119) $6
 $
 $6
 $(32) $41
 $9
State and local4
 3
 7
 (1) (23) (24) (14) 2
 (12)
Foreign58
 (34) 24
 274
 75
 349
 483
 (104) 379
Total$(54) $(34) $(88) $279
 $52
 $331
 $437
 $(61) $376


68

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements
 Year Ended December 31,
 2017 2016 2015
(In millions)Current Deferred Total Current Deferred Total Current Deferred Total
Federal$(32) $41
 $9
 $2
 $836
 $838
 $(41) $(684) $(725)
State and local(14) 2
 (12) 2
 8
 10
 (8) (18) (26)
Foreign483
 (104) 379
 91
 (16) 75
 115
 (102) 13
Total$437
 $(61) $376
 $95
 $828
 $923
 $66
 $(804) $(738)

A reconciliation of the federal statutory income tax rate applied to income (loss) from continuing operations before income taxes to the provision (benefit) for income taxes follows:
  Year Ended December 31,
(In millions) 2019 2018 2017
Total pre-tax income (loss) from continuing operations $392
 $1,427
 $(454)
Total income tax expense (benefit) $(88) $331
 $376
Effective income tax rate (benefit) on continuing operations (22)% 23% 83%
       
Income taxes at the statutory tax rate(a)(b)
 $83
 $300
 $(159)
Effects of foreign operations (29) 214
 140
Adjustments to valuation allowances (28) (177) 446
State income taxes 11
 (17) (19)
Tax law change 
 
 (35)
Other federal tax effects (125) 11
 3
Income tax expense (benefit) on continuing operations $(88) $331
 $376

(a)
Includes income tax benefits primarily related to our U.S. federal income taxes where we have maintained a full valuation allowance since December 2016.
(b)
As a result of the Tax Reform Legislation (see below), the U.S. corporate income tax rate was reduced to 21% in 2018. The U.S. corporate income tax rate was 35% in 2017.
  Year Ended December 31,
(In millions) 2017 2016 2015
Total pre-tax income (loss) from continuing operations $(454) $(1,164) $(2,439)
Total income tax expense (benefit) $376
 $923
 $(738)
Effective income tax expense (benefit) rate on continuing operations 83% 79% (30)%
       
Income taxes at the statutory tax rate of 35% (a)
 $(159) $(407) $(854)
Effects of foreign operations 140
 47
 (55)
Adjustments to valuation allowances 446
 1,270
 95
State income taxes (19) 9
 (15)
Tax law change (35) 6
 (3)
Goodwill impairment 
 
 94
Other federal tax effects 3
 (2) 
Income tax expense (benefit) on continuing operations $376
 $923
 $(738)
(a) Includes income tax benefits primarily related to our U.S. federal income taxes where we have maintained a full valuation allowance since December 2016.
The effective income tax rate is influenced by a variety of factors including the geographic and functional sources of income and the relative magnitude of these sources of income. The difference between the total provision and the sum of the amounts allocated to segments appearsis reported in the "Not“Not Allocated to Segments"Segments” column of the tables in Note 6.7.
Effects of foreign operations The effects of foreign operations decreased our tax expense in 2019 due to tax benefits related to our U.K. operations and pre-tax income in jurisdictions with effective tax rates lower than the U.S. The effects of foreign operations increased our tax expense in 2017, 2016,2018 and 20152017 due to the mix of pretaxpre-tax income between high and low tax jurisdictions. This increase primarily relates to increased sales volumes injurisdictions, including Libya during 2017 where the tax rate iswas 93.5%. Excluding Libya, the effective tax rates on continuing operations would be an expense of 14% in 2018 and 5% in 2017, an expense of 79% in 2016, and a benefit of 29% in 2015.
Adjustments to valuation allowances - Since December 31, 2016, we have maintained a full valuation allowance on our net federal deferred tax assets. In 2017, we recorded a $446 million valuation allowance primarily related to current year activity in the U.S. Included within the $446 million is a $41 million out-of-period adjustment as2017. As a result of identifying certain deferredthe sale of our Libya subsidiary in the first quarter of 2018, we do not expect to incur further tax assets for which the impact should have been recordedexpense related to other comprehensive income, but had been recorded to income from continuing operations in 2016.Libya.
Change in tax law – On December 22, 2017, the U.S. enacted the Tax Cuts and Jobs Act (the “Tax Reform Legislation”). Tax Reform Legislation, which is also commonly referred to as “U.S. tax reform”, significantly changeschanging U.S. corporate income tax laws by, among other things, reducing the U.S. corporate income tax rate to 21% starting in 2018, and repeal of the corporate alternative minimum tax (“AMT”), and a one-time deemed repatriation of accumulated foreign earnings. In the fourth quarter of 2017, we remeasured our deferred taxes at 21%, in accordance with U.S. GAAP standards.GAAP. The impact of the remeasurement on our federal deferred tax assets and liabilities was equally offset by an adjustment to our valuation allowance with no material impact to current year earnings. We recorded a net benefit of $35 million, classified as a receivable within other noncurrent assets on the consolidated balance sheet, duringIn accordance with Staff Accounting Bulletin No. 118 (“SAB 118”) we finalized our tax position in the fourth quarter of 2017 related2018 with no material changes made to the repeal of the corporate AMT. Although the $35 million net benefit represents what we believe is a reasonable estimate of the impact of the income tax effects of the Act on our consolidated financial statementspositions considered provisional as of December 31, 2017, it should be considered provisional. We do2017.
Other federal tax effects – The decrease in other federal tax effects is primarily related to the settlement of the 2010-2011 U.S. Federal Tax Audit (“IRS Audit”) in the first quarter of 2019. The release of the accrued tax positions resulted in a $126 million tax benefit, primarily related to AMT credits, see Note 25 for further detail.


69

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements



not expect to pay U.S. federal cash taxes on the deemed repatriation due to an accumulated deficit in foreign earnings for tax purposes.
Once we finalize certain tax positions when we file our 2017 federal tax return, we will be able to conclude whether any further adjustments are required to our net tax position as of December 31, 2017. Any adjustments to these provisional amounts will be reported as a component of income tax expense (benefit) in the reporting period in which any such adjustments are determined, which will be no later than the fourth quarter of 2018.
Deferred tax assets and liabilities resulted from the following:
Year Ended December 31,Year Ended December 31,
(In millions)2017 20162019 2018
Deferred tax assets:      
Employee benefits$111
 $228
$90
 $75
Operating loss carryforwards1,030
 1,065
1,685
 1,304
Capital loss carryforwards3
 4
1
 2
Foreign tax credits611
 4,430
611
 611
Other credit carryforwards
 35
Investments in subsidiaries and affiliates174
 91
Other69
 86
27
 4
Subtotal1,998
 5,939
2,414
 1,996
Valuation Allowance(926) (4,301)
Valuation allowance(699) (721)
Total deferred tax assets1,072
 1,638
1,715
 1,275
Deferred tax liabilities:      
Property, plant and equipment1,332
 3,672
1,861
 1,018
Accrued revenue81
 75
40
 60
Other3
 (7)
 3
Total deferred tax liabilities1,416
 3,740
1,901
 1,081
Net deferred tax liabilities$344
 $2,102
$186
 $
Net deferred tax assets$
 $194


Foreign Tax Credits - As a result of U.S. tax reform, we have reduced our foreign tax credits at December 31, 2017, which are offset by a corresponding reduction in valuation allowance, by $3,819 million due to the remote likelihood these credits will be utilized before expiration. We have not elected any of our foreign earnings to be permanently reinvested abroad. Additionally due to U.S. tax reform, we do not expect future foreign earnings from operations to be subject to tax in the U.S. The remaining foreign tax credits, which are offset by a valuation allowance, expire in 2022 through 2027.
Operating loss carryforwards - At December 31, 2017,2019, our operating loss carryforwards, relating to tax years beginning prior to January 1, 2018, before valuation allowance, includes $898include $655 million from the U.S. that expire in 2035-2037.2035 - 2037. Our operating loss carryforwards in the U.S. for tax years beginning after December 31, 2017, before our valuation allowance, include $829 million which can be carried forward indefinitely. Foreign operating loss carryforwards include $13$20 million that begin to expire in 2018.2020. State operating loss carryforwards of $119$181 million expire in 20182020 through 2037.2038.
Valuation allowancesForeign tax credits– At December 31, 2017,2019, we reflect foreign tax credits of $611 million, which will expire in years 2022 through 2026.
Valuation allowances – At December 31, 2019, we reflect a valuation allowance in our consolidated balance sheet of $926$699 million against our net deferred tax assets in various jurisdictions in which we operate. The reductiondecrease in valuation allowance primarily relatedrelates to current year activity.
Property, plant and equipment – At December 31, 2019, we reflected a deferred tax liability of $1.9 billion. The increase primarily relates to the reductionsale of foreign tax creditsour U.K. business and corresponding reduction in the U.S. In 2016asset retirement obligations and 2015, we increased our valuation allowance by $1,268 million and $99 million respectively.current year activity in the U.S.
Net deferred tax assets and liabilities were classified in the consolidated balance sheets as follows:
 December 31,
(In millions)2019 2018
Assets:
 
Other noncurrent assets$
 $393
Liabilities:
 
Noncurrent deferred tax liabilities186
 199
Net deferred tax liabilities$186
 $
Net deferred tax assets$
 $194



70
 December 31,
(In millions)2017 2016
Assets:
 
Other noncurrent assets$489
 $336
Liabilities:
 
Noncurrent deferred tax liabilities833
 769
Noncurrent liabilities held for sale
 1,669
Net deferred tax liabilities$344
 $2,102
We are continuously undergoing examination of our U.S. federal income tax returns by the IRS. Such audits have been completed through the 2014 tax year, with the exception of 2010-11. During the third quarter of 2017, we received a

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements



partnership adjustment notification related toWe are routinely undergoing examinations in the 2010 and 2011 tax years, forjurisdictions in which we have filed a Tax Court Petition in the fourth quarter of 2017. We believe adequate provision has been made for federal income taxes and interest which may become payable for years not yet settled. See Note 24 for further detail. Further, we are routinely involved in U.S. state income tax audits and foreign jurisdiction tax audits. We believe all other audits will be resolved within the amounts paid and/or provided for these liabilities.

operate. As of December 31, 2017,2019, our income tax returns remain subject to examination in the following major tax jurisdictions for the tax years indicated:
United States(a)
2008-20162008-2018
Equatorial Guinea2007-2016
Libya2012-2016
United Kingdom2008-20162007-2018
(a) 
Includes federal and state jurisdictions.
The following table summarizes the activity in unrecognized tax benefits:
(In millions)2019 2018 2017
Beginning balance$263
 $126
 $66
Additions for tax positions of prior years13
 152
 83
Reductions for tax positions of prior years(152) (15) (3)
Settlements(111) 
 (20)
Ending balance$13
 $263
 $126

(In millions)2017 2016 2015
Beginning balance$66
 $65
 $80
Additions for tax positions of prior years83
 6
 1
Reductions for tax positions of prior years(3) (5) 
Settlements(20) 
 (7)
Statute of limitations
 
 (9)
Ending balance$126
 $66
 $65
If the unrecognized tax benefits as of December 31, 20172019 were recognized, $10$13 million would affect our effective income tax rate. As of December 31, 2017,2019, there are $83$5 million uncertain tax positions for which it is reasonably possible that the amount could significantly change during the next twelve months. If this wereDuring the first quarter of 2019, we withdrew our appeal related to significantly change, we estimate that any revisions to current and deferred tax liabilities would have no cumulative adverse earnings impact on our consolidated results of operations.
The U.K. tax authorities have challenged the timing of deductibility for certain Brae area decommissioning costs. Incosts in the fourthU.K., thus the uncertain tax positions previously established are now considered effectively settled with no tax expense or benefit impact. Also, in the first quarter of 2017,2019, we received an adverse rulingsettled the 2010-2011 IRS Audit, resulting in a tax benefit of $126 million. See Note 25 for further detail.
Pursuant to the Tax Sharing Agreement we entered into with Marathon Petroleum Corporation (“MPC”) in connection with the 2011 spin-off transaction, MPC agreed to indemnify us for certain liabilities. In addition to the benefit from the U.K. first-tiersettlement of the IRS Audit in the first quarter of 2019, we recorded a current receivable and other income of $42 million for indemnity payments due from MPC for tax tribunal. Asexpense and interest we had previously recognized. The indemnity relates to tax and interest allocable to MPC as a result of the adverse ruling, inIRS Audit. During the fourthsecond quarter of 20172019, we established an uncertain tax position. We have appealedpaid the ruling, butIRS and were required to pay the disputed tax amount and associated interest in order to pursue the appeal. The payment of the disputed tax and interest, approximately $108 million, is not considered asubsequently reimbursed by MPC for settlement of the tax dispute with the U.K. tax authorities. If we prevail in appeals, we will be refunded the tax and interest paid, however, if we do not prevail no further material cash payments are expected due to the initial payment required to appeal the adverse ruling. See Note 24 for further detail.their indemnity obligation.
Interest and penalties are recorded as part of the tax provision and were $6 million, $2 million $1 million and $1$27 million related to unrecognized tax benefits in 2017, 20162019, 2018 and 2015.2017. As of December 31, 20172019 and 2016, $252018, $3 million and $15$27 million of interest and penalties were accrued related to income taxes.

8.9. Inventories
Crude oil and natural gas are recorded at weighted average cost and carried at the lower of cost or net realizable value. Supplies and other items consist principally of tubular goods and equipment which are valued at weighted average cost and reviewed periodically for obsolescence or impairment when market conditions indicate.
 December 31,
(In millions)2019 2018
Crude oil and natural gas$10
 $11
Supplies and other items62
 85
Inventories$72
 $96


71

 December 31,
(In millions)2017 2016
Crude oil and natural gas$9
 $6
Supplies and other items117
 130
Inventories$126
 $136

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements



9.10. Property, Plant and Equipment
 December 31,
(In millions)2019 2018
United States$16,427
 $16,011
International(a)
493
 710
Not allocated to segments80
 83
Net property, plant and equipment$17,000
 $16,804

(a)
The International decrease is due to dispositions of our non-operated interest in the Atrush block in Kurdistan and our U.K. business during 2019 (see Note 5).
 December 31,
(In millions)2017 2016
United States E&P$15,867
 $14,158
International E&P1,710
 2,470
Corporate88
 99
Net property, plant and equipment$17,665
 $16,727
At December 31, 2017, 20162019, 2018 and 20152017 we had total deferred exploratory well costs as follows:
December 31,December 31,
(In millions)2017 2016 20152019 2018 2017
Amounts capitalized less than one year after completion of drilling$263
 $131
 $352
$278
 $297
 $263
Amounts capitalized greater than one year after completion of drilling32
 118
 85

 
 32
Total deferred exploratory well costs$295
 $249
 $437
$278
 $297
 $295
Number of projects with costs capitalized greater than one year after     
completion of drilling1
 3
 2
 
Number of projects with costs capitalized greater than one year after
completion of drilling

 
 1
          
(In millions)2017 2016 20152019 2018 2017
Beginning balance$249
 $437
 $573
$297
 $295
 $249
Additions212
 299
 610
218
 262
 212
Charges to expense (a)
(64) (23) (111)(5) (35) (64)
Transfers to development(102) (388) (635)(230) (197) (102)
Dispositions(b)

 (76) 
(2) (28) 
Ending balance$295
 $249
 $437
$278
 $297
 $295

(a) 
Includes
2018 includes $32 million related to the Rodo well in Alba Block Sub Area B, offshore E.G. 2017 includes $64 million in exploratory well costs being expensed as a result of our agreement to sell Diaba License G4-223 in the Republic of Gabon in August of 2017. See (see Note 1011 for further detail.detail).
(b) 
Includes2018 includes the sale of GOM assets in 2016.our Libya subsidiary.

ExploratoryWe had 0 exploratory well costs capitalized greater than one year after completion of drilling are associated with one project in E.G. with costs of $32 million as of December 31, 2017. Management believes this project with suspended exploratory drilling costs exhibit sufficient quantities of hydrocarbons to justify potential development based on current plans. For this project in E.G., drilling was completed on the Rodo well in Alba Block Sub Area B, offshore E. G. in the first quarter of 2015,2019 and we have since completed a seismic feasibility study. In 2017, we received approval for and proceeded to perform a seismic reprocessing program. After completion of this program we will evaluate drilling opportunities within Sub Area B.December 31, 2018.
10.11. Impairments and Exploration Expenses
Impairments
As a result of our announced disposition of our Canadian business in the first quarter of 2017, we recorded a pre-tax non-cash impairment charge of $6.6 billion primarily related to property, plant and equipment. This impairment in our Canadian business is reflected as discontinued operations in the consolidated statements of income and the consolidated statements of cash flows for all periods presented
The following table summarizes impairment charges of proved properties:properties from continuing operations. Additionally, it presents the values of assets, by major category, measured at fair value on a nonrecurring basis in periods subsequent to their initial recognition.
 2019 2018 2017
(In millions)Fair Value Impairment Fair Value Impairment Fair Value Impairment
Long-lived assets held for use$56
 $24
 $113
 $75
 $179
 $229

2019 – Impairments of $24 million, to an aggregate fair value of $56 million, were primarily a result of proved property impairments primarily as a result of anticipated sales for certain non-core proved properties in our United States segment and the sale of our non-operated interest in the Atrush block (Kurdistan) in our International segment. The related fair value was measured using the market approach, based upon anticipated sales proceeds less costs to sell which resulted in a Level 2 classification.
2018 – Impairments in our International and United States segments of $75 million, to a fair value of $113 million, were largely the result of anticipated sales for certain non-core proved properties. The related fair value measurement utilized the market approach, based upon anticipated sales proceeds less costs to sell which resulted in a Level 2 classification.

72

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements
 Year Ended December 31,
(in millions)2017 2016 2015
Total impairments$229
 $67
 $721

2017 -
2017 Impairments in our International segment were primarily a result of lower forecasted long-term commodity prices and the anticipated sales of certain non-core proved properties of $136 million, to an aggregate fair value of $103 million. These fair values were measured using the market approach, based upon either anticipated sales proceeds less costs to sell or a market comparable sales price per boe which resulted in a Level 2 classification.
Impairments in our International E&PUnited States segment of $136 million. Additionally, included in proved property impairments waswere $89 million, relating to thean aggregate fair value of $76 million, and related to Gulf of Mexico and certain conventional Oklahoma assets primarily as a result of lower forecasted long-term commodity prices.
MARATHON OIL CORPORATION
Notes The fair values were measured using an income approach based upon internal estimates of future production levels, prices and discount rate. Inputs to Consolidated Financial Statements


2016 - Impairments of $67 million consisted primarily of proved properties in Oklahomathe fair value measurement include reserve and the Gulf of Mexico as a result of lower forecastedproduction estimates made by our reservoir engineers, estimated future commodity prices adjusted for quality and revisions to estimated abandonment costs.
2015 - Impairments included $340 millionlocation differentials and forecasted operating expenses for the goodwill impairmentremaining estimated life of the United States E&P reporting unit,reservoir which resulted in a Level 3 classification.
See Note 5 for discussion of the divestitures in further detail and $335 million related to proved properties (primarily in Colorado and the Gulf of Mexico) as a result of lower forecasted commodity prices, and $44 million associated with our disposition of natural gas assets in East Texas, North Louisiana and Wilburton, Oklahoma.
See Note 67 for relevant detail regarding segment presentation, Note 12 for further detail regarding the goodwill impairment and Note 14 for fair value measurements related to impairments of proved properties and long-lived assets.presentation.
Exploration expense
The following table summarizes the components of exploration expenses:
 Year Ended December 31,
(In millions)2017 2016 2015
Exploration Expenses     
Unproved property impairments$246
 $195
 $655
Dry well costs77
 25
 212
Geological and geophysical25
 5
 31
Other61
 98
 73
Total exploration expenses$409
 $323
 $971
Unproved property impairments and dry well costs
2017 - As a result of lower forecasted long-term commodity prices and the anticipated sales of certain non-core properties in our International E&P segment, we recorded a non-cash charge of $159 million comprised of $95 million in unproved property impairments; and $64 million in dry well costs related to our Diaba License G4-223 in the Republic of Gabon. Also, because of our decision not to develop the Tchicuate offshore Block in the Republic of Gabon, we recorded a non-cash impairment charge of $43 million to unproved property.
2016 - Unproved property impairments recorded of $195 million were primarily a result of our decision to not drill any of our remaining Gulf of Mexico undeveloped leases and also includes certain other unproved properties in the United States. Lower dry well expense was a result of the strategic decision to transition out of our conventional exploration program during 2015.
2015 - Primarily due to changes in our conventional exploration strategy (Gulf of Mexico, Canadian in-situ assets and Harir block in the Kurdistan Region of Iraq), relinquishment of certain properties in the Gulf of Mexico, the operated Solomon exploration well in the Gulf of Mexico and our unproved property in Colorado as a result of the proved property impairment mentioned above. Dry well costs include the operated Solomon exploration well in the Gulf of Mexico, and our operated Sodalita West #1 exploratory well in E.G.

See Note 6 for relevant detail regarding segment presentation of unproved property impairments.
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


11.12. Asset Retirement Obligations
Asset retirement obligations primarily consist of estimated costs to remove, dismantle and restore land or seabed at the end of oil and gas production operations. Changes in asset retirement obligations for the periods ended December 31 were as follows:
(In millions)2019 2018
Beginning balance$1,145
 $1,483
Incurred liabilities, including acquisitions34
 21
Settled liabilities, including dispositions(1,110) (117)
Accretion expense (included in depreciation, depletion and amortization)31
 70
Revisions of estimates46
 (204)
Held for sale(a)
108
 (108)
Ending balance(b)
$254
 $1,145

(a)
In the fourth quarter 2018, we entered into an agreement to sell our working interest in the Droshky field (Gulf of Mexico), including our $98 million asset retirement obligation; this transaction closed during the first quarter of 2019.
(b)
$944 million of the 2018 ending balance relates to our asset retirement obligations in the U.K., the sale of which closed in 2019.
2019
Settled liabilities primarily relates to the sale of our U.K. business, which closed during the third quarter of 2019, and the sale of the Droshky field (Gulf of Mexico).
Held for sale reflects a transfer to settled liabilities during 2019. This transfer was primarily related to the Droshky field (Gulf of Mexico) which was considered held for sale at year-end 2018 and closed in the first quarter of 2019.
Ending balance includes $11 million classified as short-term at December 31, 2019.
2018
Settled liabilities include dispositions, primarily related to the sale of non-core, non-operated conventional properties in the Gulf of Mexico as well as retirements in the U.K.
Revisions of estimates were primarily due to the acceleration of U.K. abandonment activities to capture favorable market conditions and lower estimated abandonment costs.
Held for sale primarily related to the Droshky field, which was considered held for sale at year-end 2018.
Ending balance primarily relates to the U.K. and includes $64 million classified as short-term at December 31, 2018.

73

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

13. Leases
Supplemental balance sheet information related to leases was as follows:
(In millions) December 31, 2019
Operating Leases:Balance Sheet Location: 
ROU assetOther noncurrent assets$199
Current portion of long-term lease liabilityOther current liabilities$101
Long-term lease liabilityDeferred credits and other liabilities$107

In determining our ROU assets and long-term lease liabilities, the new lease standard requires certain accounting policy decisions, while also providing a number of optional practical expedients for transition accounting. Our accounting policies and the practical expedients utilized are summarized below:
Implemented an accounting policy to not recognize any right-of-use assets and lease liabilities related to short-term leases on the balance sheet.
Implemented an accounting policy to not separate the lease and nonlease components for all asset classes, except for vessels.
Elected the package of practical expedients which allows us to not reassess our prior conclusions regarding the lease identification and lease classification for contracts that commenced or expired prior to the effective date.
Elected the practical expedient pertaining to land easements which allows us to continue accounting for existing agreements under the previous accounting policies as nonlease transactions. Any modifications of existing contracts or new agreements will be assessed under the new lease accounting guidance and may become leases in the future.
We enter into various lease agreements to support our operations including drilling rigs, well fracturing equipment, compressors, buildings, aircraft, vessels, vehicles and miscellaneous field equipment. We primarily act as a lessee in these transactions and all of our existing leases are classified as either short-term or long-term operating leases.
The majority of the drilling rig agreements and all of fracturing equipment agreements are classified as short-term leases based on the noncancellable period for which we have the right to use the equipment and assessment of options present in each agreement. We also incur variable lease costs under these agreements primarily related to chemicals and sand used in fracturing operations or various additional on-demand equipment and labor. The lease costs associated with the drilling rigs and fracturing equipment are primarily capitalized as part of the well costs.
Our long-term leases are comprised of compressors, buildings, drilling rigs, aircraft, vessels, vehicles and miscellaneous field equipment. Our lease agreements may require both fixed and variable payments; none of the variable payments are rate or index-based, therefore only fixed payments were considered for recognizing lease liabilities and ROU assets related to long-term leases. Also, based on our election not to separate the lease and nonlease components, fixed payments related to equipment, crew and other nonlease components are included in the initial measurement of lease liabilities and ROU assets for all asset classes, except for vessels. For vessels, the contractual consideration was allocated between lease and nonlease components based on estimates provided by service providers.

74

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

Our leased assets may be used in joint oil and gas operations with other working interest owners. We recognize lease liabilities and ROU assets only when we are the signatory to a contract as an operator of joint properties. Such lease liabilities and ROU assets are determined based on gross contractual obligations. As we use the leased assets for joint operations, we have the contractual right to recover the other working interest owners’ share of lease costs. As a result, our lease costs are presented on a net basis, reduced for any costs recoverable from other working interest owners. The table below presents our net lease costs as of December 31, 2019 with the majority of operating lease costs expensed as incurred, while the majority of the short-term and variable lease costs are capitalized into property, plant and equipment.
(In millions)Year Ended December 31, 2019
Lease costs: 
Operating lease costs(a)
$84
Short-term lease costs(b)
321
Variable lease costs(c)
107
Total lease costs$512
  
Other information: 
Cash paid for amounts included in the measurement of operating lease liabilities$100
ROU assets obtained in exchange for new operating lease liabilities(d)
$293
(a)
Represents our net share of the ROU asset amortization and the interest expense.
(b)
Represents our net share of lease costs arising from leases of less than one year but longer than one month that were not included in the lease liability.
(c)
Represents our net share of variable lease payments that were not included in the lease liability.
(d)
Represents the cumulative value of ROU assets recognized at lease inception during the year of 2019.  This amount is then amortized as we utilize the ROU asset, the net effect of which is the ending ROU asset of $199 million (first table above).

We use our periodic incremental borrowing rate to discount future contractual payments to their present values. The weighted average lease term and the discount rate relevant to long-term leases were two years and 4% as of December 31, 2019. The remaining annual undiscounted cash flows associated with long-term leases and the reconciliation of these cash flows to the lease liabilities recognized on the consolidated balance sheet is summarized below.
(In millions)Operating Lease Obligations
2020$114
202163
202235
20235
20241
Thereafter
Total undiscounted lease payments$218
Less: amount representing interest10
Total operating lease liabilities$208
Less: current portion of long-term lease liability as of December 31, 2019101
Long-term lease liability as of December 31, 2019$107


75

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

At December 31, 2018, future minimum commitments under the previous accounting standard, ASC 840, for operating lease obligations having noncancellable lease terms in excess of one year were as follows:
 For Year Ended December 31,
(In millions)2017 2016
Beginning balance$1,652
 $1,544
Incurred liabilities, including acquisitions25
 14
Settled liabilities, including dispositions(50) (74)
Accretion expense (included in depreciation, depletion and amortization)85
 79
Revisions of estimates(227) 96
Held for sale(2) (7)
Ending balance$1,483
 $1,652
(In millions)Operating Lease Obligations
2019$62
202054
202135
202212
20235
Thereafter49
Sublease rentals
Total minimum lease payments$217
2017* Future minimum commitments for capital lease obligations were NaN as of December 31, 2018.
Our wholly-owned subsidiary, Marathon E.G. Production Limited, is a lessor for residential housing in Equatorial Guinea, which is occupied by EGHoldings, a related party equity method investee see Note 23. The lease was classified as an operating lease and expires in 2024, with a lessee option to extend through 2034. Lease payments are fixed for the entire duration of the agreement at approximately $6 million per year. Our lease income is reported in other income in our consolidated statements of income for all periods presented. The undiscounted cash flows to be received under this lease agreement are summarized below.
Settled liabilities include dispositions,
(In millions)Operating Lease Future Cash Receipts
2020$6
20216
20226
20236
20246
Thereafter60
Total undiscounted cash flows$90

In 2018, we signed an agreement with an owner/lessor to construct and lease a new build-to-suit office building in Houston, Texas. The new Houston office location is expected to be completed in 2021. The lessor and other participants are providing financing for up to $380 million, to fund the estimated project costs. As of December 31, 2019, project costs incurred totaled approximately $58 million, primarily relatedfor land acquisition and initial design costs. The initial lease term is five years and will commence once construction is substantially complete and the new Houston office is ready for occupancy. At the end of the initial lease term, we can negotiate to extend the lease term for an additional five years, subject to the saleapproval of the participants; purchase the property subject to certain conventional assets in Oklahoma as well as retirements interms and conditions; or remarket the U.K.property to an unrelated third party. The lease contains a residual value guarantee of approximately 89% of the total acquisition and the Gulf of Mexico.construction costs.

76

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements
Revisions of estimates were primarily due to changes in U.K. estimated costs as well as timing of abandonment activities in the U.K.

14. Goodwill
Ending balance includes $55 million classified as short-term atAs of December 31, 2017.
2016
Settled liabilities include dispositions, primarily related to the Gulf2019, our consolidated balance sheet included goodwill of Mexico and Wyoming as well as retirements in the Gulf of Mexico.
Revisions of estimates were primarily due to changes in timing of abandonment activities as well as changes in cost estimated in the U.K.
Ending balance includes $50 million classified as short-term at December 31, 2016.

12. Goodwill
$95 million. Goodwill is tested for impairment on an annual basis, or between annual tests when events or changes in circumstances indicate the fair value of a reporting unit with goodwill may have been reduced below its carrying value. Goodwill is tested for impairment at the reporting unit level. Our reporting units are the same as our reporting segments, of which only International E&P includes goodwill. We estimatefirst assess the qualitative factors in order to determine whether the fair value of our International E&P reporting unit is more likely than not less than its carrying amount. Certain qualitative factors used in our evaluation include, among other things, the results of the most recent quantitative assessment of the goodwill impairment test, macroeconomic conditions; industry and market conditions (including commodity prices and cost factors); overall financial performance; and other relevant entity-specific events. If, after considering these events and circumstances we determined that it is more likely than not that the fair value of the International reporting unit is less than its carrying amount, a quantitative goodwill test is performed. The quantitative goodwill test is performed using a combination of market and income approaches. The market approach referencedreferences observable inputs specific to us and our industry, such as the price of our common equity, our enterprise value, and valuation multiples of us and our peers from the investor analyst community. The income approach utilizedutilizes discounted cash flows, which wereare based on forecasted assumptions. Key assumptions to the income approach include future liquid hydrocarbon and natural gas pricing, estimated quantities of liquid hydrocarbons and natural gas proved and probable reserves, estimated timing of production, discount rates, future capital requirements, operating expenses and tax rates. The assumptions used in the income approach are consistent with those that management uses to make business decisions. These valuation methodologiesThis quantitative goodwill test would represent Level 3 fair value measurements. We
During the second quarter of 2019, we performed our annual impairment test of goodwill using the qualitative assessment. Our qualitative assessment considered the significant excess fair value over carrying value in our most recent step 1 test (second quarter 2017) and noted a general improvement in the second quarter of 2017 and concluded no impairment was required. Asqualitative factors above. After assessing the totality of the date ofqualitative factors which could have a positive or negative impact on goodwill, our last impairment assessment did not indicate that it is more likely than not that the fair value ofis less than its carrying value. As a result, we concluded that no impairment to goodwill was required for our International E&P reporting unit exceeded its book value by over 40%. We believeunit.
As of December 31, 2019 and 2018 our International segment is the estimates and assumptions used in our impairment assessments are reasonable and based on available market information, but variations in such assumptions could result in materially different calculations of fair value and determinations of whether or not an impairment is indicated.
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


only reporting segment which includes goodwill. The table below displays the allocated beginning goodwill balances bybalance of our International segment along with changes in the carrying amount of goodwill for 20172019 and 2016:2018:
(In millions) International
2018  
Beginning balance, gross $115
Less: accumulated impairments 
Beginning balance, net 115
Dispositions(a)
 (18)
Impairment 
Ending balance, net $97
2019  
Beginning balance, gross $97
Less: accumulated impairments 
Beginning balance, net 97
Dispositions (2)
Impairment 
Ending balance, net $95

(a)
Primarily related to the sale of our Libya subsidiary (see Note 5).

77
(In millions)U.S. E&P Int'l E&P Total
2016     
Beginning balance, gross$
 $115
 $115
Less: accumulated impairments
 
 
Beginning balance, net
 115
 115
  Dispositions
 
 
Impairment
 
 
Ending balance, net$
 $115
 $115
2017     
Beginning balance, gross$
 $115
 $115
Less: accumulated impairments
 
 
Beginning balance, net
 115
 115
Dispositions
 
 
Impairment
 
 
Ending balance, net$
 $115
 $115


13.
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

15. Derivatives
ForSee Note 16 for further information regarding the fair value measurement of derivative instruments see Note 14.instruments. See Note 1for discussion of the types of derivatives we may use and the reasons for them. All of our commodity derivatives and historical interest rate derivatives areare/were subject to enforceable master netting arrangements or similar agreements under which we may report net amounts. The following tables present the gross fair values of derivative instruments and the reported net amounts along with where they appear on the consolidated balance sheets.
December 31, 2017 December 31, 2019 
(In millions)Asset Liability Net Asset Balance Sheet LocationAsset Liability Net Asset (Liability) Balance Sheet Location
Not Designated as Hedges            
Commodity$
 $138
 $(138) Other current liabilities$9
 $1
 $8
 Other current assets
Commodity
 2
 (2) Deferred credits and other liabilities1
 
 1
 Other noncurrent assets
Commodity
 5
 (5) Other current liabilities
Total Not Designated as Hedges$
 $140
 $(140) $10
 $6
 $4
 
      
Cash Flow Hedges     
Interest Rate$2
 $
 $2
 Other noncurrent assets
Total Designated Hedges$2
 $
 $2
 
Total$
 $140
 $(140) $12
 $6
 $6
 
 December 31, 2018  
(In millions)Asset Liability Net Asset (Liability) Balance Sheet Location
Not Designated as Hedges       
Commodity$131
 $
 $131
 Other current assets
Commodity
 4
 (4) Deferred credits and other liabilities
Total Not Designated as Hedges$131
 $4
 $127
  
 December 31, 2016  
(In millions)Asset Liability Net Asset Balance Sheet Location
Fair Value Hedges       
     Interest rate$3
 $
 $3
 Other current assets
     Interest rate1
 
 1
 Other noncurrent assets
Cash Flow Hedges       
     Interest rate$64
 $
 $64
 Other noncurrent assets
Total Designated Hedges$68
 $
 $68
  
        
Not Designated as Hedges       
     Commodity$
 $60
 $(60) Other current liabilities
Total Not Designated as Hedges$
 $60
 $(60)  
     Total$68
 $60
 $8
  

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


Derivatives Designated as Fair Value Hedges
During the third quarter of 2017, we terminated all of our interest rate swaps designated as fair value hedges. The pretax effects of derivative instruments designated as hedges of fair value in our consolidated statements of income has a gross impact that is not material to net interest and other in all periods presented. Additionally, there is no ineffectiveness related to fair value hedges in all periods presented.
The following table presents, by maturity date, information about our interest rate swap agreements, including the weighted average, London Interbank Offer Rate (“LIBOR”) based, floating rate.
 December 31, 2017 December 31, 2016
 Aggregate Notional AmountWeighted Average, LIBOR-Based, Aggregate Notional AmountWeighted Average, LIBOR-Based,
Maturity Dates(in millions)Floating Rate (in millions)Floating Rate
October 1, 2017$
% $600
5.10%
March 15, 2018$
% $300
5.04%
The pretax effect of derivative instruments designated as hedges of fair value in our consolidated statements of income is summarized in the table below. There is no ineffectiveness related to the historical fair value hedges.
  Gain (Loss)
  Year Ended December 31,
(In millions)Income Statement Location2017 2016 2015
Derivative      
Interest rateNet interest and other$
 $(4) $
Hedged Item  
  
  
DebtNet interest and other$
 $4
 $


Derivatives Not Designated as Hedges
Terminated Interest Rate Swaps
During the thirdsecond quarter of 2016,2017, we entered intode-designated forward starting interest rate swaps used to hedge the variations in cash flows related to fluctuations in long term interest rates from debt that were probable to bewas refinanced by us in 2018, specifically interest rate risk associated with future changes in the benchmark treasury rate. We designated these derivative instruments as cash flow hedges. During the secondthird quarter of 2017, we de-designated the forward starting interest rate swaps previously designated as cash flow hedges.2017. In the third quarter of 2017, the forecasted transaction consummated and we issued $1 billion in senior unsecured notes. See Note 15 for further detail. As a result, we terminated our forward starting interest rate swaps receivingfor proceeds of $54 million. Wemillion and recognized a gain of $47$46 million related to deferred gains reclassified from accumulated other comprehensive income, in net interest and other during 2017.interest. See Note 17for further detail.
The following table presents, by maturity date, information about our terminated forward starting interest rate swap agreements, including the rate.
 December 31, 2017 December 31, 2016
 Aggregate Notional AmountWeighted Average, LIBOR Aggregate Notional AmountWeighted Average, LIBOR
Maturity Dates(in millions)Fixed Rate (in millions)Fixed Rate
March 15, 2018$
% $750
1.57%
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


The following table sets forth the net impact of the terminated forward starting interest rate swap derivatives de-designated as cash flow hedges on other comprehensive income (loss).
  Year Ended December 31,
(In millions) 2017
Interest Rate Swaps  
 Beginning balance $60
Change in fair value recognized in other comprehensive income (13)
Reclassification from other comprehensive income (47)
 Ending balance $


78

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements
  Year Ended December 31,
(In millions) 2017 2016 2015
Interest Rate Swaps      
  Beginning balance $60
 $
 $
Change in fair value recognized in other comprehensive income (13) 64
 
Reclassification from other comprehensive income (47) (4) 
  Ending balance $
 $60
 $

Commodity Derivatives
We have entered into multiple crude oil and natural gas derivatives indexed to NYMEX WTI and Henry Hub related to a portion of our forecasted United States E&P sales through 2019.2021. These commodity derivatives consist of three-way collars swaps, and basis swaps. Three-way collars consist of a sold call (ceiling), a purchased put (floor) and a sold put. The ceiling price is the maximum we will receive for the contract volumes,volumes; the floor is the minimum price we will receive, unless the market price falls below the sold put strike price. In this case, we receive the NYMEX WTI/Henry HubWTI price plus the difference between the floor and the sold put price. These commoditycrude oil derivatives were not designated as hedges.
The following table sets forth outstanding derivative contracts as of December 31, 20172019 and the weighted average prices for those contracts:
 2020  2021
Crude OilFirst Quarter Second Quarter Third Quarter Fourth Quarter  Full Year
NYMEX WTI Three-Way Collars          
Volume (Bbls/day)60,000
 60,000
 60,000
 60,000
  
Weighted average price per Bbl:          
Ceiling$66.04
 $66.04
 $63.74
 $63.74
  $
Floor$55.00
 $55.00
 $55.00
 $55.00
  $
Sold put$47.67
 $47.67
 $48.00
 $48.00
  $
Basis Swaps - Argus WTI Midland(a)
          
Volume (Bbls/day)15,000
 15,000
 15,000
 15,000
  
Weighted average price per Bbl$(0.94) $(0.94) $(0.94) $(0.94)  $
Basis Swaps - NYMEX WTI / ICE Brent(b)
          
Volume (Bbls/day)5,000
 5,000
 5,000
 5,000
  808
Weighted average price per Bbl$(7.24) $(7.24) $(7.24) $(7.24)  $(7.24)
Natural Gas          
Three-Way Collars          
Volume (MMBtu/day)100,000
 
 
 
  
Weighted average price per MMBtu:          
Ceiling$3.32
 $
 $
 $
  $
Floor$2.75
 $
 $
 $
  $
Sold put$2.25
 $
 $
 $
  $
Crude Oil
 2018 2019
 First Quarter Second Quarter Third Quarter Fourth Quarter First Quarter Second Quarter
Three-Way Collars (a)
           
Volume (Bbls/day)85,000 85,000 85,000 85,000 10,000 10,000
Weighted average price per Bbl:           
Ceiling$56.38 $56.38 $56.96 $56.96 $60.00 $60.00
Floor$51.65 $51.65 $51.53 $51.53 $55.00 $55.00
Sold put$45.00 $45.00 $44.65 $44.65 $47.00 $47.00
Swaps           
Volume (Bbls/day)20,000 20,000    
Weighted average price per Bbl$55.12 $55.12 $— $— $— $—
Basis Swaps (b)
           
Volume (Bbls/day)5,000 5,000 10,000 10,000  
Weighted average price per Bbl$(0.60) $(0.60) $(0.67) $(0.67) $— $—

(a) 
Between January 1, 2018 and February 12, 2018, we entered into 10,000 Bbls/day of three-way collars for July - December 2018 with an average ceilingThe basis differential price of $63.51, a floor price of $57.00, and a sold put price of $50.00 and 20,000 Bbls/day of three-way collars for January - June 2019 with an average ceiling price of $67.92, a floor price of $53.50, and a sold put price of $46.50.is indexed against Argus WTI Midland.
(b) 
The basis differential price is between WTI Midlandindexed against Intercontinental Exchange (“ICE”) Brent and WTI Cushing.NYMEX WTI.
MARATHON OIL CORPORATIONBetween January 1, 2020 and February 10, 2020, we entered into 20,000 bbls/day of three-way collars for 2020 with a ceiling price of $66.37, a floor price of $55.00 and a sold put price of $48.00.
Notes to Consolidated Financial Statements


Natural Gas
 2018
 First QuarterSecond QuarterThird QuarterFourth Quarter
Three-Way Collars    
Volume (MMBtu/day)200,000160,000160,000160,000
Weighted average price per MMBtu    
Ceiling$3.79$3.61$3.61$3.61
Floor$3.08$3.00$3.00$3.00
Sold put$2.55$2.50$2.50$2.50

The mark-to-market impact and settlement of these commodity derivative instruments appears in salesthe table below and is reflected in net gain (loss) on commodity derivatives in the consolidated statements of income.
 Year Ended December 31,
(In millions)2019 20182017
Mark-to-market gain (loss)$(124) $267
$(81)
Net settlements of commodity derivative instruments$52
 $(281)$45


79

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

Derivatives Designated as Cash Flow Hedges
During 2019, we entered into forward starting interest rate swaps with a total notional amount of $320 million to hedge variations in cash flows related to the 1-month London Interbank Offered Rate (“LIBOR”) component of future lease payments of our future Houston office. These swaps will settle monthly on the same day the lease payment is made with the first swap settlement occurring in January 2022. We expect the first lease payment to commence sometime in the period from December 2021 to May 2022. The last swap will mature on September 9, 2026. See Note 13for further details regarding the lease of the new Houston office.
The following table presents information about our interest rate swap agreements, including the weighted average LIBOR-based, fixed rate.
 December 31, 2019 December 31, 2018
(In millions, except fixed rates)Aggregate Notional Amount Weighted Average, LIBOR Aggregate Notional Amount Weighted Average, LIBOR
Interest rate swaps$320
 1.514% $
 %

At December 31, 2019, accumulated other operating revenues in ourcomprehensive income included deferred gains of $2 million related to forward starting interest rate swaps. No amounts related to these swaps are expected to impact the consolidated statements of income forin the years ended December 31, 2017, 2016, and 2015. The December 31, 2017, 2016, and 2015 impact was a net loss of $36 million, a net loss of $66 million, and a net gain of $128 million, respectively. Net settlements of commodity derivative instruments for the years ended December 31, 2017, 2016, and 2015 were gains of $45 million, $44 million, and $78 million, respectively.next 12 months.
14.16. Fair Value Measurements
Fair valuesValues – Recurring
The following tables'tables’ present assets and liabilities accounted for at fair value on a recurring basis as of December 31, 2019 and 2018 by hierarchy level.
 December 31, 2019
(In millions)Level 1 Level 2 Level 3 Total
Derivative instruments, assets       
Commodity(a) 
$
 $7
 $
 $7
Interest rate
 2
 
 2
Derivative instruments, assets$
 $9
 $
 $9
Derivative instruments, liabilities       
Commodity(a)
$(3) $
 $
 $(3)
Derivative instruments, liabilities$(3) $
 $
 $(3)
Total$(3) $9
 $
 $6
        
 December 31, 2018
(In millions)Level 1 Level 2 Level 3 Total
Derivative instruments, assets       
Commodity(a) 
$21
 $106
 $
 $127
Derivative instruments, assets$21
 $106
 $
 $127
Derivative instruments, liabilities       
Derivative instruments, liabilities$
 $
 $
 $
Total$21
 $106
 $
 $127

 December 31, 2017
(In millions)Level 1 Level 2 Level 3 Total
Derivative instruments, assets       
Interest rate
 
 
 
Derivative instruments, assets$
 $
 $
 $
Derivative instruments, liabilities       
Commodity (a)
$(20) $(120) $
 $(140)
Derivative instruments, liabilities$(20) $(120) $
 $(140)
        
 December 31, 2016
(In millions)Level 1 Level 2 Level 3 Total
Derivative instruments, assets       
     Interest rate$
 $68
 $
 $68
Derivative instruments, assets$
 $68
 $
 $68
Derivative instruments, liabilities       
Commodity (a) 
$
 $60
 $
 $60
Derivative instruments, liabilities$
 $60
 $
 $60
(a) Derivative instruments are recorded on a net basis in our balance sheet (see Note 13).
(a)
Derivative instruments are recorded on a net basis in our consolidated balance sheet (see Note 15).
Commodity derivatives include three-way collars swaps, and basis swaps. These instruments are measured at fair value using either a Black-Scholes or a modified Black-Scholes Model. For swaps and basis swaps, inputs to the models include only commodity prices and interest rates and are categorized as Level 1 because all assumptions and inputs are observable in active markets throughout the term of the instruments. For three-way collars, inputs to the models include commodity prices, interest rates, and implied volatility and are categorized as Level 2 because predominantly all assumptions and inputs are observable in active markets throughout the term of the instruments.
Historically, both our interest rate swaps and
80

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

The forward starting interest rate swaps are measured at fair value with a market approach using actionable broker quotes, which are Level 2 inputs. See Note 1315 for additional discussion ofdetails on the types of derivative instruments we use.  
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


forward starting interest swaps.  
Fair valuesValues – Goodwill
See Note 14for detail information relating to goodwill.
Fair Values – Nonrecurring
The following table shows the values of assets, by major category, measured at fair valueSee Note 5 and Note 11 for detail on a nonrecurring basis in periods subsequent to their initial recognition.
 2017 2016 2015
(In millions)Fair Value Impairment Fair Value Impairment Fair Value Impairment
Long-lived assets held for use$179
 $229
 $15
 $67
 $56
 $386
Long-lived assets held for use that were impaired are discussed below. Theour fair values unless otherwise noted, were measured using an income approach based upon internal estimates of future production levels, prices and discount rate, all of which are Level 3 inputs.  Inputs to the fair value measurement include reserve and production estimates made by our reservoir engineers, estimated future commodity prices adjusted for quality and location differentials and forecasted operating expenses for the remaining estimated life of the reservoir.
United States E&P
In the third quarter of 2017, impairments of $65 million were recorded consisting of certain proved properties in the Gulf of Mexicononrecurring items, such as a result of lower forecasted long-term commodity prices, to an aggregate fair value of $66 million.
In the third quarter of 2016, impairments of $47 million were recorded consisting primarily of conventional non-core proved properties in Oklahoma as a result of lower forecasted long-term commodity prices, to an aggregate fair value of $15 million. During the fourth quarter of 2016, we recorded an impairment of $17 million as a result of abandonment cost revisions related to the Ozona development in the Gulf of Mexico which ceased productions in 2013.
In the third quarter of 2015, impairments of $333 million were recorded primarily related to certain producing assets in Colorado and the Gulf of Mexico as a result of lower forecasted commodity prices, to an aggregate fair value of $41 million.
During the second quarter of 2015, we recorded an impairment charge of $44 million related to East Texas, North Louisiana and Wilburton, Oklahoma natural gas assets as a result of the anticipated sale. The fair values were measured using a probability weighted income approach based on both the anticipated sale price and held-for-use model.
International E&P
In the third quarter of 2017, we recorded proved property impairments of $136 million, to an aggregate fair value of $103 million, on certain non-core properties in our International E&P segment primarily as a result of lower forecasted long-term commodity prices and as a result of the anticipated sales of certain non-core international assets. The fair values were measured using the market approach, based upon either anticipated sales proceeds less costs to sell or a market comparable sales price per boe. This resulted in a Level 2 classification. See Note5 for further information about the divestment of certain non-core properties in our International E&P segment.
In the third quarter of 2015, a partial impairment of $12 million was recorded to an investment in an equity method investee as a result of lower forecasted commodity prices, to a fair value of $604 million. The impairment was reflected in income from equity method investments in our consolidated statement of income.
Canadian discontinued operations
As a result of our announced disposition of our Canadian business in the first quarter of 2017, we recorded a pre-tax non-cash impairment charge of $6.6 billion primarily related to property, plant and equipment. This impairment was recorded for excess net book value over anticipated sales proceeds less costs to sell. Fair values of assets held for sale were determined based upon the anticipated sales proceeds less costs to sell, which resulted in a Level 2 classification. See Note 5 for relevant detail regarding dispositionsimpairments.
Fair valuesValues – Financial instrumentsInstruments
Our current assets and liabilities include financial instruments, the most significant of which are receivables, the current portion of our long-term debt and payables. We believe the carrying values of our receivables and payables approximate fair value. Our fair value assessment incorporates a variety of considerations, including (1) the short-term duration of the instruments, (2) our credit rating and (3) our historical incurrence of and expected future insignificance of bad debt expense, which includes an evaluation of counterparty credit risk.
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


The following table summarizes financial instruments, excluding receivables, payables and derivative financial instruments, and their reported fair valuevalues by individual balance sheet line item at December 31, 20172019 and 2016.2018.
December 31,December 31,
2017 20162019 2018
(In millions)
Fair
Value
 
Carrying
Amount
 
Fair
Value
 
Carrying
Amount
Fair
Value
 
Carrying
Amount
 
Fair
Value
 
Carrying
Amount
Financial assets              
Other current assets (a)
$762
 $761
 $7
 $7
Current assets$4
 $4
 $3
 $3
Other noncurrent assets159
 161
 105
 108
26
 38
 76
 81
Total financial assets$921
 $922
 $112
 $115
$30
 $42
 $79
 $84
Financial liabilities              
Other current liabilities$32
 $43
 $68
 $75
$62
 $90
 $37
 $58
Long-term debt, including current portion (b)(a)
5,976
 5,526
 7,449
 7,292
6,174
 5,529
 5,469
 5,528
Deferred credits and other liabilities110
 103
 114
 107
99
 86
 93
 88
Total financial liabilities$6,118
 $5,672
 $7,631
 $7,474
$6,335
 $5,705
 $5,599
 $5,674
(a) 
Includes our two notes receivable relating to the sale of our Canadian business as of December 31, 2017, see note 5 for further information.
(b)
Excludes capital leases, debt issuance costs and historical interest rate swap adjustments.costs.
Fair values of our notes receivable and our financial assets included in other noncurrent assets, and of our financial liabilities included in other current liabilities and deferred credits and other liabilities, are measured using an income approach and most inputs are internally generated, which results in a Level 3 classification. Estimated future cash flows are discounted using a rate deemed appropriate to obtain the fair value.
MostAll of our long-term debt instruments are publicly-traded.publicly traded. A market approach, based upon quotes from major financial institutions, which are Level 2 inputs, is used to measure the fair value of suchour debt. The fair value of our debt that is not publicly-traded is measured using an income approach. The future debt service payments are discounted using the rate at which we currently expect to borrow. All inputs to this calculation are Level 3.
15.17. Debt
Short-term debtRevolving Credit Facility
In September 2019, we entered into a fourth amendment to our unsecured revolving credit facility (the “Credit Facility”) to reduce the maximum borrowing from $3.4 billion to $3.0 billion and extended the maturity date by one year to May 28, 2023. As of December 31, 2017,2019, we had no0 borrowings against our $3.4$3.0 billion unsecured revolving credit facility (as amended, the "Credit Facility"), as described below.
Revolving Credit Facility
In June 2017, we extended the maturity date of our Credit Facility from May 28, 2020 to May 28, 2021. In July 2017, we increasedor under our $3.3 billion unsecured Credit FacilityU.S. commercial paper program that is backed by $93 million to a total of $3.4 billion. Fees on the unused commitment of each lender, as well as the borrowing options under the Credit Facility, remain unaffected by the increase and term extension. We have the ability to request two additional one-year extensions and an option to increase the commitment amount by up to an additional $107 million, subject to the consent of any increasing lenders.  The sub-facilities for swing-line loans and letters of credit remain unchanged allowing up to an aggregate amount of $100 million and $500 million, respectively. Facility.
The Credit Facility includes a covenant requiring that our ratio of total debt to total capitalization not exceed 65% as of the last day of each fiscal quarter. If an event of default occurs, the lenders holding more than half of the commitments may terminate the commitments under the Credit Facility and require the immediate repayment of all outstanding borrowings and the cash collateralization of all outstanding letters of credit under the Credit Facility. As of December 31, 2017,2019, we were in compliance with this covenant with a debt-to-capitalization ratio of 32%31%.

81

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

Long-term debt
The following table details our long-term debt:
December 31,December 31,
(In millions)2017 20162019 2018
Senior unsecured notes:      
6.000% notes due 2017
 682
5.900% notes due 2018
 854
7.500% notes due 2019
 228
2.700% notes due 2020(a)
600
 600
$
 $600
2.800% notes due 2022(a)
1,000
 1,000
1,000
 1,000
9.375% notes due 2022 (b)
32
 32
32
 32
Series A notes due 2022 (b)
3
 3
3
 3
8.500% notes due 2023 (b)
70
 70
70
 70
8.125% notes due 2023 (b)
131
 131
131
 131
3.850% notes due 2025(a)
900
 900
900
 900
4.400% notes due 2027(a)
1,000
 
1,000
 1,000
6.800% notes due 2032(a)
550
 550
550
 550
6.600% notes due 2037(a)
750
 750
750
 750
5.200% notes due 2045(a)
500
 500
500
 500
Capital leases:   
Capital lease obligation expiring in 2018
 1
Other obligations:   
5.125% obligation relating to revenue bonds due 2037
 1,000
Bonds:(c)
   
2.00% bonds due 2037200
 
2.10% bonds due 2037200
 
2.20% bonds due 2037200
 
Total(b)
5,536
 7,301
5,536
 5,536
Unamortized discount(10) (9)(7) (8)
Fair value adjustments(c)

 7
Unamortized debt issuance cost(32) (35)(28) (29)
Amounts due within one year
 (683)
Total long-term debt$5,494
 $6,581
$5,501
 $5,499
(a) 
These notes contain a make-whole provision allowing us to repay the debt at a premium to market price.
(b) 
In the event of a change in control, as defined in the related agreements, debt obligations totaling $236 million at December 31, 20172019 may be declared immediately due and payable.
(c) 
See Notes 13Mandatory purchase dates for these bonds: April 1, 2023 for the 2.00% bonds; July 1, 2024 for the 2.10% bonds; and 14July 1, 2026 for information on historical interest rate swaps.the 2.20% bonds. Subsequent to the various mandatory purchase dates, we will also have the right to convert and remarket these any time up to the 2037 maturity date.
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


Debt Issuance
On July 24, 2017,October 3, 2019, we issued $1 billion of 4.4%redeemed our $600 million 2.7% senior unsecured notes that will mature on July 15, 2027. Interest on the senior unsecured notes is payable semi-annually beginning January 15, 2018. We may redeem some or alldue June 2020.
The following table shows future debt payments:
(In millions) 
2020$
2021
20221,035
2023401
2024200
Thereafter3,900
Total long-term debt, including current portion$5,536

Debt Issuance
On October 1, 2019, we closed a $600 million remarketing to investors of sub-series A bonds which are part of the senior unsecured notes at any time at the applicable redemption price, plus accrued interest, if any. During the third quarter of 2017, we used the net proceeds of $990 million plus existing cash on hand to redeem the following senior unsecured notes:
$682 million 6.0% Notes Due in 2017
$854 million 5.9% Notes Due in 2018
$228 million 7.5% Notes Due in 2019

During the year ended 2017, as a result of the above redemption of $1.76$1.0 billion in senior unsecured notes, we recognized a loss on early extinguishment of debt of $46 million, primarily due to make-whole call provisions. In connection with the redemption of the senior unsecured notes, we terminated our forward starting interest rate swaps, which resulted in proceeds of $54 million and a gain of approximately $47 million into earnings in 2017. See Note 13 for further detail on our historical forward starting interest rate swaps.
Debt Redemption
In December 2017, we entered into a transaction to purchase $1 billion of 3.75% municipal revenue bonds due in 2037, to be issued by the Parish of St. John the Baptist, State of Louisiana (the "Parish").revenue refunding bonds originally issued and purchased in December 2017. The Parish will use$600 million in proceeds from the proceedsconversion and remarketing were used to redeem $1 billionpay the purchase price of 5.125% municipalour converted 2017 bonds on the closing date. We continue to own the remaining $400 million of the revenue refunding bonds due in 2037 with cash on hand in a refunding transaction. We purchasedand have the $1 billion of 3.75% municipal revenue bonds due in 2037 on their date of issuanceright to hold for our own accountconvert and potential remarketingremarket them to investors at any time up to the public at a future2037 maturity date.
The following table shows future debt payments:
(In millions) 
2018$
2019
2020600
2021
20221,035
Thereafter3,901
Total long-term debt, including current portion$5,536


16.18. Incentive Based Compensation
Description of stock-based compensation plans– The Marathon Oil Corporation 20162019 Incentive Compensation Plan (the "2016 Plan"“2019 Plan”) was approved by our stockholders in May 20162019 and authorizes the Compensation Committee of the Board of Directors to grant stock options, SARs,stock appreciation rights (“SARs”), stock awards (including restricted stock and restricted stock unit awards), performance unit awards and performance unitcash awards to employees. The 20162019 Plan also allows us to provide equity compensation to our non-employee directors. No more than 5527.9 million shares of our common stock may be issued under the 20162019 Plan. For stock options and SARs,In connection with the granting of an award under the 2019 Plan, the number of shares available for issuance under the 20162019 Plan will be reduced by one share for each share of our common stock in respect of which the award is granted. Forgranted, except that awards that by their terms do not permit settlement in shares of our common stock awards (including restricted stock and restricted stock unit awards),will not reduce the number of shares of common stock available for issuance under the 2016 Plan will be reduced by 2.41 shares for each share of our common stock in respect of which the award is granted.2019 Plan.
Shares subject to awards under the 20162019 Plan that are forfeited, terminated or expire unexercised become available for future grants. In addition, the number of shares of our common stock reserved for issuance under the 20162019 Plan will not be increased by shares tendered to satisfy the purchase price of an award, exchanged for other awards or withheld to satisfy tax withholding obligations. Shares issued as a result of awards granted under the 20162019 Plan are generally funded out of common stock held in treasury, except to the extent there are insufficient treasury shares, in which case new common shares are issued.
After approval of the 20162019 Plan, no0 new grants were or will be made from any prior plans. Any awards previously granted under any prior plans shall continue to be exercisable in accordance with their original terms and conditions.
Stock-based awards under the plans
Stock options – We grant stock options under the 20162019 Plan. Our stock options represent the right to purchase shares of our common stock at its fair market value on the date of grant. In general, our stock options vest ratably over a three-year period and have a maximum term of ten years from the date they are granted.
SARs - At December 31, 2017,2019, there are no0 SARs outstanding.
Restricted stock– We grant restricted stock under the 20162019 Plan. The restricted stock awards granted to officers generally vest three years from the date of grant, contingent on the recipient’s continued employment. We also grant restricted stock to certain non-officer employees based on their performance within certain guidelines and for retention purposes. The restricted stock awards to non-officers generally vest ratably over a three-year period, contingent on the recipient’s continued employment. Prior to vesting, all restricted stock recipients have the right to vote such stock and receive dividends thereon. The non-vested shares of restricted stock are not transferable and are held by our transfer agent.
Stock-based performance units – We grant stock-based performance units to officers under the 20162019 Plan. At the grant date, each unit represents the value of one share of our common stock. These units are settled in cash,shares, and the amountnumber of the paymentshares of our common stock to be paid is based on (1) the vesting percentage, which can be from zero0 to 200% based on performance achieved over a three-year performance period, and (2) the value of our common stock on the date vesting isas determined by the Compensation Committee of the Board of Directors. The performance goals are tied to our total shareholder return (“TSR”) as compared to TSR for a group of peer companies determined by the Compensation Committee of our Board of Directors. Dividend equivalents may accrue during the performance period and would be paid in cash at the end of the performance period based on the numberamount of dividends credited generally over the performance period on shares of our common stock that would represent the value of the units.units granted multiplied by the vesting percentage.
Restricted stock units– We maintain an equity compensation program for our non-employee directors.  All non-employee directors receive annual grants of common stock units.  Any units granted prior to 2012 must be held until completion of board
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


service, at which time the non-employee director will receive common shares.  For units granted between 2012 and 2016, common shares will generally vest following completion of board service or three years from the date of grant, whichever is earlier.  For awards issued in 2017 and later, directors may elect to defer settlement of their common stock units until after they cease serving on the Board.  Absent such an election to defer, common shares will vest upon the earlier of three years from the date of grant or completion of board service. WeUnder the 2019 Plan, we also grant restricted stock units to officers, which generally vest three years from the date of the grant and restricted stock units to certain non-officer international employees, which generally vest ratably over a three-year period,period.  Both awards are contingent on the recipient'srecipient’s continued employment. Grants of restricted stock units to these non-officer international employees are generally based on their performance and for retention purposes. Common shares will be issued for these restricted stock units after vesting. Prior to vesting, recipients of restricted stock units typically receive dividend equivalent payments, but they may not vote.



82

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

Total stock-based compensation expense – Total employee stock-based compensation expense was $60 million, $53 million and $50 million $51 millionin 2019, 2018 and $57 million in 2017, 2016 and 2015, while the total related income tax benefits were $19 million and $20 million in 2016 and 2015.2017. Due to the full valuation allowance on our net federal deferred tax assets, we realizedrecognized no tax benefit during 2017. During 2016 and 2015, cashthese years. Cash received upon exercise of stock option awards was $1 million and $9 million.$26 million for 2019 and 2018. There was no cash received upon exercise of stock option awards for 2017. There were no0 tax benefits realized for deductions for stock awards settled during 2017, 20162019, 2018 and 2015.2017.
Stock option awards – During 2017, 20162019, 2018 and 20152017 we granted stock option awards to officer employees. The weighted average grant date fair value of these awards was based on the following weighted average Black-Scholes assumptions:

2019 2018 2017
Exercise price per share$16.79
 $14.52
 $15.80
Expected annual dividend yield1.2% 1.4% 1.3%
Expected life in years5.82
 6.45
 6.4
Expected volatility43% 43% 42%
Risk-free interest rate2.5% 2.8% 2.1%
Weighted average grant date fair value of stock option awards granted$6.62
 $5.83
 $6.07

2017 2016 2015
Exercise price per share$15.80 $7.22 $29.06
Expected annual dividend yield1.3% 2.8% 2.9%
Expected life in years6.4
 6.3
 6.2
Expected volatility42% 36% 32%
Risk-free interest rate2.1% 1.4% 1.7%
Weighted average grant date fair value of stock option awards granted$6.07 $1.97 $6.84

The following is a summary of stock option award activity in 2017.2019.
 Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term 
Aggregate Intrinsic Value
(in millions)
Outstanding at beginning of year6,180,007 $24.39
    
Granted648,526 $16.79
    
Exercised(84,804) $8.17
    
Canceled(1,083,998) $25.45
    
Outstanding at end of year5,659,731 $23.55
 5 years $3
Exercisable at end of year4,323,312
 $25.96
 4 years $3
Expected to vest1,319,850
 $15.76
 8 years $
 Number Weighted Average 
Weighted Average
Remaining
 Aggregate Intrinsic Value
 of Shares Exercise Price Contractual Term (in millions)
Outstanding at beginning of year11,915,533 $27.71    
Granted799,591 $15.80    
Exercised(8,666) $7.22    
Canceled(2,375,682) $33.31    
Outstanding at end of year10,330,776 $25.52 4 years $13
Exercisable at end of year8,661,893
 $27.91 3 years $5
Expected to vest1,650,737
 $13.08 9 years $8

The intrinsic value of stock option awards exercised during 20172018 was $13 million while it was immaterial during 2019 and 2016 were not material. The intrinsic value of stock awards exercised during 2015 was $6 million.2017.
As of December 31, 2017,2019, unrecognized compensation cost related to stock option awards was $4$5 million, which is expected to be recognized over a weighted average period of one1 year.
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


Restricted stock awards and restricted stock units – The following is a summary of restricted stock and restricted stock unit award activity in 2017.2019.
Awards 
Weighted Average
Grant Date
Fair Value
Awards Weighted Average Grant Date Fair Value
Unvested at beginning of year6,933,533
  $14.448,504,946
 $14.04
Granted4,198,624
 $16.134,113,190
 $16.65
Vested & Exercised(2,472,367) $17.67
Vested and Exercised(3,813,221) $12.64
Canceled(1,086,945) $15.03(1,630,529) $15.78
Unvested at end of year7,572,845
  $14.247,174,386
 $15.88
The vesting date fair value of restricted stock awards which vested during 2019, 2018 and 2017 2016 and 2015 was $30$48 million, $16$48 million and $26$39 million. The weighted average grant date fair value of restricted stock awards was $14.24, $14.44$15.88, $14.04 and $30.76$14.24 for awards unvested at December 31, 2017, 20162019, 2018 and 2015.2017.
As of December 31, 20172019 there was $67$65 million of unrecognized compensation cost related to restricted stock awards which is expected to be recognized over a weighted average period of one1 year.
Stock-based performance unit awards – During 2017, 20162019, 2018 and 20152017 we granted 563,631, 1,205,517656,636, 754,140 and 382,335563,631 stock-based performance unit awards to officers. At December 31, 2017,2019, there were 1,510,8231,282,296 units outstanding. Total stock-based performance unit awards expense was $7 million in 2019, $13 million in 2018 and $8 million in 2017 and $6 million in 2016. We had no stock-based performance unit awards expense in 2015.2017.

83

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

The key assumptions used in the Monte Carlo simulation to determine the fair value of stock-based performance units granted in 2017, 20162019, 2018 and 20152017 were:
 
2019(a)
 2018 
2017(b)
Valuation date stock price$16.79
 $13.69
 $13.58
Expected annual dividend yield1.2% 1.5% N/A
Expected volatility43% 41% N/A
Risk-free interest rate2.5% 1.5% N/A
Fair value of stock-based performance units outstanding$20.66
 $17.29
 $14.18

 2017 2016 
2015 (a)
Valuation date stock price$16.93 $16.93 $16.93
Expected annual dividend yield1.2% 1.2% 1.2%
Expected volatility54% 34% 33%
Risk-free interest rate1.9% 1.7% 1.4%
Fair value of stock-based performance units outstanding$21.63 $19.86 $0.00
(a) As of December 31, 2017, there were no 2015 performance unit awards outstanding.
(a)
Represents key assumptions at grant date, as 2019 performance unit awards are settled in stock.
(b)
N/A as these stock-based performance unit awards vested as of December 31, 2019 and as such the value is based on the final payout.
17.19. Defined Benefit Postretirement Plans and Defined Contribution Plan
We have noncontributory defined benefit pension plans covering substantially all domestic employees, as well as U.K. employees who were hired before April 2010. Certain employees located in E.G., who are U.S. or U.K. based, also participate in these plans.employees. Benefits under these plans are based on plan provisions specific to each plan. For the U.K.
We also had a noncontributory defined benefit pension plan covering eligible U.K. employees that was transferred to the principal employer and plan trustees reached a decision to closebuyer in connection with the plan to future benefit accruals effectivesale of our U.K. business during 2019. See Note 5 for further information on this disposition. During the year ended December 31, 2015.2019, we reclassified $20 million from accumulated other comprehensive income to pension assets upon remeasurement of the plan.
We also have defined benefit plans for other postretirement benefits covering our U.S. employees. Health care benefits are provided up to age 65 through comprehensive hospital, surgical and major medical benefit provisions subject to various cost-sharing features. Post-age 65 health care benefits are provided to certain U.S. employees on a defined contribution basis. Life insurance benefits are provided to certain retiree beneficiaries. These other postretirement benefits are not funded in advance. Employees hired after 2016 are not eligible for any postretirement health care or life insurance benefits.


84

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements



Obligations and funded status The following summarizes the obligations and funded status for our defined benefit pension and other postretirement plans.    
 Pension Benefits Other Benefits
 2019 2018 2019 2018
(In millions)U.S. Int’l U.S. Int’l U.S. U.S.
Accumulated benefit obligation$343
 $
 $320
 $511
 $89
 $96
            
Change in pension benefit obligations:           
Beginning balance$326
 $511
 $384
 $599
 $96
 $221
Service cost19
 
 18
 
 1
 2
Interest cost12
 8
 12
 14
 3
 7
Plan amendment
 
 
 3
 
 (99)
Divestiture(a)

 (549) 
 
 
 
Actuarial loss (gain)48
 36
 (20) (38) 9
 (15)
Foreign currency exchange rate changes
 6
 
 (29) 
 
Settlements paid(45) 
 (62) (23) 
 
Benefits paid(6) (12) (6) (15) (20) (20)
Ending balance$354
 $
 $326
 $511
 $89
 $96
Change in fair value of plan assets:           
Beginning balance$203
 $594
 $216
 $670
 $
 $
Actual return on plan assets44
 68
 (6) (21) 
 
Employer contributions40
 8
 61
 17
 20
 20
Foreign currency exchange rate changes
 8
 
 (34) 
 
Divestiture(a)

 (666) 
 
 
 
Settlements paid(45) 
 (62) (23) 
 
Benefits paid(6) (12) (6) (15) (20) (20)
Ending balance$236
 $
 $203
 $594
 $
 $
Funded status of plans at December 31$(118) $
 $(123) $83
 $(89) $(96)
Amounts recognized in the consolidated balance sheets:           
Noncurrent assets$
 $
 $
 $83
 $
 $
Current liabilities(6) 
 (5) 
 (18) (19)
Noncurrent liabilities(112) 
 (118) 
 (71) (77)
Accrued benefit cost$(118) $
 $(123) $83
 $(89) $(96)
Pretax amounts in accumulated other comprehensive loss:           
Net loss$85
 $
 $90
 $59
 $23
 $14
Prior service cost(29) 
 (36) 5
 (129) (147)

(a)
Refer to Note 5 for further information on the sale of our U.K. business.





85
 Pension Benefits Other Benefits
 2017 2016 2017 2016
(In millions)U.S. Int’l U.S. Int’l U.S. U.S.
Accumulated benefit obligation378
 599
 386
 583
 221 227
Change in benefit obligations:           
Beginning balance$397
 $583
 $525
 $579
 $227
 $260
Service cost22
 
 25
 
 2
 2
Interest cost13
 17
 16
 23
 8
 11
Plan amendment
 
 
 1
 
 (38)
Actuarial loss (gain)42
 (7) 78
 139
 5
 11
Foreign currency exchange rate changes
 52
 
 (108) 
 
Divestiture
 
 
 
 
 
Settlements paid(84) (31) (240) (36) 
 
Benefits paid(6) (15) (7) (15) (21) (19)
Ending balance$384
 $599
 $397
 $583
 $221
 $227
Change in fair value of plan assets:           
Beginning balance$227
 $595
 $354
 $608
 $
 $
Actual return on plan assets27
 47
 25
 129
 
 
Employer contributions52
 17
 95
 18
 21
 20
Foreign currency exchange rate changes
 57
 
 (109) 
 
Divestiture
 
 
 
 
 
Settlements paid(84) (31) (240) (36) 
 
Benefits paid(6) (15) (7) (15) (21) (20)
Ending balance$216
 $670
 $227
 $595
 $
 $
Funded status of plans at December 31$(168) $71
 $(170) $12
 $(221) $(227)
Amounts recognized in the consolidated balance sheets:           
Noncurrent assets
 71
 
 12
 
 
Current liabilities(6) 
 (4) 
 (21) (21)
Noncurrent liabilities(162) 
 (166) 
 (200) (206)
Accrued benefit cost$(168) $71
 $(170) $12
 $(221) $(227)
Pretax amounts in accumulated other comprehensive loss:           
Net loss (gain)$122
 $58
 $130
 $81
 $30
 $25
Prior service cost (credit)(45) 3
 (55) 4
 (56) (63)





MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements



Components of net periodic benefit cost from continuing operations and other comprehensive (income) loss – The following summarizes the net periodic benefit costs and the amounts recognized as other comprehensive (income) loss for our defined benefit pension and other postretirement plans.
 Pension Benefits Other Benefits
 Year Ended December 31, Year Ended December 31,
 2019 2018 2017 2019 2018 2017
(In millions)U.S. Int’l U.S. Int’l U.S. Int’l U.S. U.S. U.S.
Components of net periodic benefit cost:                 
Service cost$19
 $
 $18
 $
 $22
 $
 $1
 $2
 $2
Interest cost12
 8
 12
 14
 13
 17
 3
 7
 8
Expected return on plan assets(10) (11) (11) (24) (13) (30) 
 
 
Amortization:                 
- prior service credit(7) 
 (10) 
 (10) 
 (19) (8) (7)
- actuarial loss7
 
 11
 
 8
 1
 1
 1
 
Net settlement loss(a)
12
 
 18
 3
 28
 4
 
 
 
Net periodic benefit cost(b)
$33
 $(3) $38
 $(7) $48
 $(8) $(14) $2
 $3
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss (pretax):                 
Actuarial loss (gain)$14
 $(21) $(4) $8
 $28
 $(26) $9
 $(15) $5
Amortization of actuarial gain (loss)(19) (41) (29) (3) (36) (4) (1) (1) 
Prior service cost (credit)
 
 
 3
 
 
 
 (99) 
Amortization of prior service credit (cost)7
 (6) 10
 
 10
 
 19
 8
 7
Total recognized in other comprehensive (income) loss$2
 $(68) $(23) $8
 $2
 $(30) $27
 $(107) $12
Total recognized in net periodic benefit cost and other comprehensive (income) loss$35
 $(71) $15
 $1
 $50
 $(38) $13
 $(105) $15
 Pension Benefits Other Benefits
 Year Ended December 31, Year Ended December 31,
 2017 2016 2015 2017 2016 2015
(In millions)U.S. Int’l U.S. Int’l U.S. Int’l U.S. U.S. U.S.
Components of net periodic benefit cost:                 
Service cost$22
 $
 $25
 $
 $29
 $14
 $2
 $2
 $3
Interest cost13
 17
 16
 23
 25
 25
 8
 11
 11
Expected return on plan assets(13) (30) (18) (35) (30) (37) 
 
 
Amortization:                 
- prior service cost (credit)(10) 
 (10) 1
 (7) 1
 (7) (3) (4)
- actuarial loss8
 1
 14
 
 22
 2
 
 
 1
  Net curtailment loss (gain)(a)

 
 
 
 (5) 4
 
 
 (7)
Net settlement loss(b)
28
 4
 97
 6
 119
 
 
 
 
Net periodic benefit cost(c)
$48
 $(8) $124
 $(5) $153
 $9
 $3
 $10
 $4
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss (pretax):                 
Actuarial loss (gain)$28
 $(26) $70
 $41
 $30
 $(25) $5
 $11
 $(21)
Amortization of actuarial gain (loss)(36) (4) (111) (6) (134) (2) 
 
 (1)
Prior service cost (credit)
 
 
 1
 (89) 1
 
 (38) 
Amortization of prior service credit (cost)10
 
 10
 (1) 7
 (5) 7
 3
 13
Total recognized in other comprehensive (income) loss$2
 $(30) $(31) $35
 $(186) $(31) $12
 $(24) $(9)
Total recognized in net periodic benefit cost and other comprehensive (income) loss$50
 $(38) $93
 $30
 $(33) $(22) $15
 $(14) $(5)

(a) 
Related to workforce reductions, which reduced the future expected years of service for employees participating in the plans and the impact of discontinuing accruals for future benefits under the U.K. pension plan effective December 31, 2015.
(b)
Settlement lossesSettlements are recorded whenrecognized as they occur, once it is probable that lump sum payments from a plan infor a periodgiven year will exceed the plan’s total service and interest costs for the period.that year.
(c)(b) 
Net periodic benefit cost reflects a calculated market-related value of plan assets which recognizes changes in fair value over three years.
The estimated net loss and prior service credit for our defined benefit pension plans that will be amortized from accumulated other comprehensive loss into net periodic benefit cost in 20182020 are $13$9 million and $10$7 million. The estimated net loss and prior service credit for our other defined benefit postretirement plans that will be amortized from accumulated other comprehensive loss into net periodic benefit cost in 20182020 are $1$2 million and $7$18 million.
Plan assumptions – The following summarizes the assumptions used to determine the benefit obligations at December 31, and net periodic benefit cost for the defined benefit pension and other postretirement plans for 2017, 20162019, 2018 and 2015.2017.
 Pension Benefits Other Benefits
 2019 2018 2017 2019 2018 2017
(In millions)U.S. U.S. Int’l U.S. Int’l U.S. U.S. U.S.
Weighted average assumptions used to determine benefit obligation:               
Discount rate3.13% 4.26% 2.90% 3.55% 2.50% 2.91% 4.09% 3.54%
Rate of compensation increase4.50% 4.00% % 4.00% % 4.50% 4.00% 4.00%
Weighted average assumptions used to determine net periodic benefit cost:               
Discount rate3.70% 3.88% 2.50% 3.86% 2.70% 4.09% 3.54% 3.98%
Expected long-term return on plan assets6.25% 6.50% 3.70% 6.50% 4.50% % % %
Rate of compensation increase4.00% 4.00% % 4.00% % 4.00% 4.00% 4.00%





86
 Pension Benefits Other Benefits
 2017 2016 2015 2017 2016 2015
(In millions)U.S. Int’l U.S. Int’l U.S. Int’l U.S. U.S. U.S.
Weighted average assumptions used to determine benefit obligation:                 
Discount rate3.55% 2.50% 4.02% 2.70% 4.04% 3.90% 3.54% 3.98% 4.36%
Rate of compensation increase (a)
4.00% 
 4.00% 
 4.00% 
 4.00% 4.00% 4.00%
Weighted average assumptions used to determine net periodic benefit cost:                 
Discount rate3.86% 2.70% 3.66% 3.90% 3.79% 3.70% 3.98% 4.36% 3.93%
Expected long-term return on plan assets6.50% 4.50% 6.75% 5.50% 6.75% 5.70% 
 
 
Rate of compensation increase (a)
4.00% 
 4.00% % 4.00% 3.60% 4.00% 4.00% 4.00%
(a)
No future benefits will be incurred for the U.K. plan after December 31, 2015. Therefore, rate of compensation increase is no longer applicable to this plan.

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements



Expected long-term return on plan assets – The expected long-term return on plan assets assumption for our U.S. funded plan is determined based on an asset rate-of-return modeling tool developed by a third-party investment group which utilizes underlying assumptions based on actual returns by asset category and inflation and takes into account our U.S. pension plan’s asset allocation. To determine the expected long-term return on plan assets assumption for our international plans, we consider the current level of expected returns on risk-free investments (primarily government bonds), the historical levels of the risk premiums associated with the other applicable asset categories and the expectations for future returns of each asset class. The expected return for each asset category is then weighted based on the actual asset allocation to develop the overall expected long-term return on plan assets assumption.
Assumed weighted average health care cost trend rates
 2017 2016 2015
Initial health care trend rate8.00% 8.25% 8.00%
Ultimate trend rate4.70% 4.50% 4.50%
Year ultimate trend rate is reached2025
 2025
 2024
Employer provided subsidies for post-65 retiree health care coverage were frozen effective January 1, 2017 at January 1, 2016 established amount levels. Company contributions are funded to a Health Reimbursement Account on the retiree’s behalf to subsidize the retiree’s cost of obtaining health care benefits through a private exchange.exchange (the “post-65 retiree health benefits”). Therefore, a 1% change in health care cost trend rates would not have a material impact on either the service and interest cost components and the postretirement benefit obligations.
In the fourth quarter of 2018, we terminated the post-65 retiree health benefits effective as of December 31, 2020. The post-65 retiree health benefits will no longer be provided after that date. In addition, the pre-65 retiree medical coverage subsidy has been frozen as of January 1, 2019, and the ability for retirees to opt in and out of this coverage, as well as pre-65 retiree dental and vision coverage, has also been eliminated. Retirees must enroll in connection with retirement for such coverage, or they lose eligibility. These plan changes reduced our retiree medical benefit obligation by approximately $99 million at December 31, 2018.
Plan investment policies and strategies – The investment policies for our U.S. and international pension plan assets reflect the funded status of the plans and expectations regarding our future ability to make further contributions. Long-term investment goals are to: (1) manage the assets in accordance with applicable legal requirements; (2) produce investment returns which meet or exceed the rates of return achievable in the capital markets while maintaining the risk parameters set by the plan'splan’s investment committees and protecting the assets from any erosion of purchasing power; and (3) position the portfolios with a long-term risk/return orientation. Investment performance and risk is measured and monitored on an ongoing basis through quarterly investment meetings and periodic asset and liability studies.
U.S. plan – The plan’s current targeted asset allocation is comprised of 55% equity securities and 45% other fixed income securities. Over time, as the plan’s funded ratio (as defined by the investment policy) improves, in order to reduce volatility in returns and to better match the plan’s liabilities, the allocation to equity securities will decrease while the amount allocated to fixed income securities will increase. The plan'splan’s assets are managed by a third-party investment manager.
International planOur international plan's target asset allocation is comprisedAs mentioned above, the plan covering eligible U.K. employees that was transferred to the buyer in connection with the sale of 55% equity securities and 45% fixed income securities. The plan assets are invested in ten separate portfolios, mainly pooled fund vehicles, managed by several professional investment managers whose performance is measured independently by a third-party asset servicing consulting firm.our U.K. business during 2019.
Fair value measurements – Plan assets are measured at fair value. The following provides a description of the valuation techniques employed for each major plan asset class at December 31, 20172019 and 2016.2018.
Cash and cash equivalents Cash and cash equivalents are valued using a market approach and are considered Level 1. This investment also includes a cash reserve account (a collective short-term investment fund) that is valued using an income approach and is considered Level 2.
Equity securities -Investments in common stock and preferred stock are valued using a market approach at the closing price reported in an active market and are therefore considered Level 1. Private equity investments include interests in limited partnerships which are valued based on the sum of the estimated fair values of the investments held by each partnership.partnership, determined using a combination of market, income and cost approaches, plus working capital, adjusted for liabilities, currency translation and estimated performance incentives. These private equity investments are considered Level 3. Investments in pooled funds are valued using a market approach, at the net asset value ("NAV") of units held. Thethese various funds consist of either an equity or fixed income investment portfolio with underlying investments held in U.S. and non-U.S. securities. Nearly all of the underlying investments are publicly-traded. The majority of the pooled funds are benchmarked against a relative public index. Theseindex and are considered Level 2.
Fixed income securities - Fixed income securities are valued using a market approach. U.S. treasury notes and exchange traded funds ("ETFs"(“ETFs”) are valued at the closing price reported in an active market and are considered Level 1. Corporate bonds, non-U.S. government bonds, private placements, taxable municipals,and GNMA/FNMAFNMA/FHLMC pools and Yankee bonds are valued using calculated yield curves created by models that incorporate various market factors. Primarily investments are held in U.S. and non-U.S. corporate bonds in diverse industries and are considered Level 2. Forward contracts included under government securities are traded in the over-the-counter market and occur between two parties only with no intermediary. The details of each contract such as trade size, price and maturity are tailored to each security and negotiated between the two parties, as such, these investments are considered Level 3. Other fixed income investments include futures contracts, real estate investment trusts, credit default, zero coupon and interest rate swaps. The investmentInvestments in the commingledpooled funds are valued using a market

87

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements



approach, and primarily have investments held in U.S. and non-U.S. publicly traded investment grade government and corporate bonds and are considered Level 2.
Other – Other investments are comprised of an unallocated annuity contract, two limited liability companies, and real estate. All are considered Level 3, as significant inputs to determine fair value are unobservable.
Commingled funds – The investment in the commingled funds isare valued using the NAVnet asset value of units held as a practical expedient. The commingled funds consist of equity and fixed income portfolios with underlying investments held in U.S. and non-U.S. securities. Pooled funds primarily have investments held in U.S. and non-U.S. publicly traded investment grade government and corporate bonds and are considered Level 2.
Other – Other investments are comprised of an unallocated annuity contract, two limited liability companies, real estate and U.S. treasury futures. All are considered Level 3, as significant inputs to determine fair value are unobservable.
The following tables present the fair values of our defined benefit pension plan'splan’s assets, by level within the fair value hierarchy, as of December 31, 20172019 and 2016.2018.
December 31, 2017December 31, 2019
(In millions)Level 1 Level 2 Level 3 TotalLevel 1Level 2Level 3Total
U.S. Int’l U.S. Int’l U.S. Int’l U.S. Int’l
Cash and cash equivalents$6
 $1
 $
 $
 $
 $
 $6
 $1
Cash and cash equivalents(a)
$(7) $
 $
 $(7)
Equity securities:                      
Common stock81
 
 
 
 
 
 81
 
75
 
 
 75
Private equity
 
 
 
 16
 
 16
 

 
 10
 10
Mutual and pooled funds
 151
 
 115
 
 
 
 266
Pooled funds
 
 
 
Fixed income securities:                      
Corporate
 
 6
 
 
 
 6
 

 2
 
 2
Exchange traded funds5
 
 
 
 
 
 5
 
3
 
 
 3
Government19
 
 2
 
 3
 
 24
 
31
 11
 5
 47
Pooled funds
 
 
 403
 
 
 
 403

 
 
 
Other
 
 
 
 19
 
 19
 

 
 18
 18
Total investments, at fair value111
 152
 8
 518
 38
 
 157
 670
102
 13
 33
 148
Commingled funds (a)

 
 
 
 
 
 59
 
Commingled funds(b)

 
 
 88
Total investments$111
 $152
 $8
 $518
 $38
 $
 $216
 $670
$102
 $13
 $33
 $236
  
December 31, 2018
(In millions)Level 1 Level 2 Level 3 Total
  
U.S. Int’l U.S. Int’l U.S. Int’l U.S. Int’l
Cash and cash equivalents(a)
$(1) $5
 $
 $
 $
 $
 $(1) $5
Equity securities:               
Common stock75
 
 
 
 
 
 75
 
Private equity
 
 
 
 14
 
 14
 
Pooled funds
 
 
 191
 
 
 
 191
Fixed income securities:               
Corporate
 
 4
 
 
 
 4
 
Government22
 
 9
 
 3
 
 34
 
Pooled funds
 
 
 398
 
 
 
 398
Other
 
 
 
 17
 
 17
 
Total investments, at fair value96
 5
 13
 589
 34
 
 143
 594
Commingled funds(b)

 
 
 
 
 
 60
 
Total investments$96
 $5
 $13
 $589
 $34
 $
 $203
 $594
  
December 31, 2016
(In millions)Level 1 Level 2 Level 3 Total
  
U.S. Int’l U.S. Int’l U.S. Int’l U.S. Int’l
Cash and cash equivalents$8
 $5
 $
 $
 $
 $
 $8
 $5
Equity securities:               
   Common stock82
 
 
 
 
 
 82
 
   Private equity
 
 
 
 20
 
 20
 
Mutual and pooled funds
 201
 
 159
 
 
 
 360
Fixed income securities:               
 Corporate
 
 52
 
 
 
 52
 
 Exchange traded funds5
 
 
 
 
 
 5
 
 Government6
 
 19
 
 
 
 25
 
    Pooled funds
 
 
 230
 
 
 
 230
Other
 
 
 
 21
 
 21
 
Total investments, at fair value101
 206
 71
 389
 41
 
 213
 595
   Commingled funds (a)

 
 
 
 
 
 14
 
Total investments$101
 $206
 $71
 $389
 $41
 $
 $227
 $595

(a)
The negative cash balance was due to the timing of when investment trades occur and when they settle.
(b)
After the adoption of the FASB update for the fair value hierarchy, we separately report the investments for which fair value was measured using the net asset value per share as a practical expedient. Amounts presented in this table are intended to reconcile the fair value hierarchy to the pension plan assets. See Note 2 for further information on the FASB update.


The activity during the year ended December 31, 20172019 and 2016,2018, for the assets using Level 3 fair value measurements was immaterial.



88


MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements




Cash flows
Estimated future benefit payments– The following gross benefit payments, which were estimated based on actuarial assumptions applied at December 31, 20172019 and reflect expected future services, as appropriate, are to be paid in the years indicated.
Pension Benefits Other Benefits
(In millions)U.S. Int’l U.S.Pension Benefits Other Benefits
2018$43
 $17
 $21
201940
 18
 20
202037
 17
 20
$39
 $18
202133
 19
 19
35
 10
202230
 21
 18
31
 9
2023 through 2027123
 118
 74
202329
 8
202427
 7
2025 through 2029116
 25
Contributions to defined benefit plans – We expect to make contributions to the funded pension plansplan of up to $65$28 million in 2018.2020. Cash contributions to be paid from our general assets for the unfunded pension and postretirement plans are expected to be approximately $6 million and $21$18 million in 2018.2020.
Contributions to defined contribution plans– We contribute to several defined contribution plans for eligible employees. Contributions to these plans totaled $20$18 million, $20$22 million and $20 million in 2017, 20162019, 2018 and 2015.

2017.
18.20.  Reclassifications Out of Accumulated Other Comprehensive LossIncome (Loss)
The following table presents a summary of amounts reclassified from accumulated other comprehensive loss:income (loss):
 Year Ended December 31,  
(In millions)2017 2016 Income Statement Line
Postretirement and postemployment plans     
Amortization of actuarial loss$(9) $(14) General and administrative
Net settlement loss(32) (103) General and administrative
Derivative hedges     
Recognized gain on terminated derivative hedge46
 
 Net interest and other
     Ineffective portion of derivative hedge1
 4
 Net interest and other
 6
 (113) Income (loss) from operations
 (40) 41
 (Provision) benefit for income taxes
Total reclassifications to expense, net of tax$(34) $(72) Income (loss) from continuing operations
Foreign currency hedges     
Net recognized loss in discontinued operations, net of tax(30) 
 Income (loss) from discontinued operations
Total reclassifications to expense$(64) $(72)  
 Year Ended December 31, 
(In millions)2019 2018Income Statement Line
Postretirement and postemployment plans    
Amortization of prior service credit$26
 $18
Other net periodic benefit costs
Amortization of actuarial loss(8) (12)Other net periodic benefit costs
Net settlement loss, net of tax(12) (20)Other net periodic benefit costs
 6
 (14) 
Other
 
 
U.K pension plan transferred to buyer (a)(b)
83
 
 
Foreign currency translation adjustment related to sale of U.K. business(b)
30
 
 
Income taxes related to sale of U.K. business (b)
(45) 
 
 68
 
Net gain on disposal of assets
Other insignificant items, net of tax1
 
Net interest and other
Total reclassifications to expense, net of tax$75
 $(14)Net income (loss)
(a)
See Note 19for detailon the U.K. pension plan.
(b)
See Note 5 for detail on the U.K. disposition.

89

19.
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

21. Supplemental Cash Flow Information
 Year Ended December 31,
(In millions)2019 2018 2017
Included in operating activities:     
Interest paid, net of amounts capitalized$269
 $270
 $379
Income taxes paid to taxing authorities, net of refunds received(a)
73
 287
 391
Noncash investing activities, related to continuing operations:     
Increase (decrease) in asset retirement costs$80
 $(183) $(202)
Asset retirement obligations assumed by buyer(b)
1,082
 82
 14
Notes receivable for disposition of assets
 
 748

(a)
2019, 2018 and 2017 includes $90 million, $37 million and $1 million, related to tax refunds. 2017 included a payment of $108 million made to the U.K. tax authorities to preserve our appeal rights, see Note 25 for additional discussion.
(b)
In 2019, our dispositions include the sale of the Droshky field (Gulf of Mexico), the sale of our non-operated interest in the Atrush block in Kurdistan and the sale of our U.K. business. See Note 5 for further detail on dispositions.

 Year Ended December 31,
(In millions)2017 2016 2015
Net cash used in operating activities:     
Interest paid (net of amounts capitalized)$(379) $(375) $(325)
Income taxes paid to taxing authorities  (a)
(391) (84) (171)
Noncash investing activities, related to continuing operations:     
Changes in asset retirement costs$(202) $110
 $(95)
Asset retirement obligations assumed by buyer14
 40
 251
Increase in capital expenditure accrual176
 
 
Notes receivable for disposition of assets748
 
 
(a) Includes a paymentOther noncash investing activities include accrued capital expenditures as of $108December 31, 2019, 2018 and 2017 of $288 million, made to U.K. taxing authorities to preserve our appeal rights, see Note 7 - Income Taxes for additional discussion.$250 million and$329 million.
20.22. Other Items
Net interest and other
Year Ended December 31,Year Ended December 31,
(In millions)2017 2016 20152019 2018 2017
Interest:          
Interest income$34
 $14
 $9
$25
 $32
 $34
Interest expense(380) (398) (350)(280) (280) (380)
Income on interest rate swaps53
 13
 11

 
 53
Interest capitalized3
 18
 19

 
 3
Total interest(290) (353) (311)(255) (248) (290)
Other:          
Net foreign currency gain (loss)8
 6
 4
4
 9
 8
Other12
 15
 21
7
 13
 12
Total other20
 21
 25
11
 22
 20
Net interest and other$(270) $(332) $(286)$(244) $(226) $(270)


Foreign currency– Aggregate foreign currency gains (losses) were included in the consolidated statements of income as follows:
 Year Ended December 31,
(In millions)2019 2018 2017
Net interest and other$4
 $9
 $8
Provision for income taxes2
 10
 57
Aggregate foreign currency gains$6
 $19
 $65


90

 Year Ended December 31,
(In millions)2017 2016 2015
Net interest and other$8
 $6
 $4
Provision for income taxes57
 (32) (11)
Aggregate foreign currency gains (losses)$65
 $(26) $(7)

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements



21.23. Equity Method Investments and Related Party Transactions
During 2017, 20162019, 2018 and 2015 only2017 our equity method investees were considered related parties and they included:
EGHoldings, in which we have a 60% noncontrolling interest. EGHoldings is engaged in LNG production activity.
Alba Plant LLC, in which we have a 52% noncontrolling interest. Alba Plant LLC processes LPG.
AMPCO, in which we have a 45% noncontrolling interest. AMPCO is engaged in methanol production activity.
Our equity method investments are summarized in the following table:
 Ownership as of December 31,
(In millions)December 31, 2019 2019 2018
EGHoldings60% $310
 $402
Alba Plant LLC52% 163
 167
AMPCO45% 190
 176
Total  $663
 $745
 Ownership as of December 31,
(In millions)December 31, 2017 2017 2016
EGHoldings60% $456
 $550
Alba Plant LLC52% 214
 215
AMPCO45% 177
 165
Other investments  
 1
Total  $847
 $931

Dividends and partnership distributions received from equity method investees (excluding distributions that represented a return of capital previously contributed) were $105 million in 2019, $270 million in 2018 and $276 million in 2017, $192 million in 2016 and $178 million in 2015.2017.
Summarized financial information for equity method investees is as follows:
(In millions)2019 2018 2017
Income data – year:     
Revenues and other income$832
 $1,269
 $1,294
Income from operations250
 588
 631
Net income187
 459
 508
Balance sheet data – December 31:     
Current assets$455
 $559
  
Noncurrent assets1,049
 931
  
Current liabilities284
 253
  
Noncurrent liabilities183
 87
  

(In millions)2017 2016 2015
Income data – year (a):
     
Revenues and other income$1,294
 $770
 $769
Income from operations631
 346
 313
Net income508
 313
 280
Balance sheet data – December 31:     
Current assets$586
 $525
  
Noncurrent assets1,044
 1,173
  
Current liabilities221
 218
  
Noncurrent liabilities94
 47
  

(a)
See Item 15 Exhibits, Financial Statement Schedules which contains the Alba Plant LLC audited financial statements, which have been included pursuant to Rule 3-09 of Regulation S-X.
Revenues from related parties were $42 million, $48 million and $60 million $54 millionin 2019, 2018 and $51 million in 2017, 2016 and 2015,respectively, with the majority related to EGHoldings in all years. PurchasesWe had 0 purchases from related parties wereduring both 2019 and 2018, and $132 million $103 million and $207 million in 2017, 2016 and 2015 with the majority related to Alba Plant LLC in all years.LLC.
Current receivables from related parties at December 31, 20172019 and 2016,2018 were $24$28 million and $23 million.$25 million, with the majority related to EGHoldings and Alba Plant LLC for 2019 and EGHoldings in 2018. Payables to related parties were $14$11 million and $11$15 million at December 31, 20172019 and 2016,2018, respectively, with the majority related to Alba Plant LLC.
22.24. Stockholders’ Equity
In March 2016,On July 31, 2019, the Board of Directors authorized an extension of the share repurchase program, which increased the remaining share repurchase authorization to $1.5 billion. During 2019, we issued 166,750,000acquired approximately 24 million of common shares of our common stock, par value $1 per share, at a pricecost of $7.65 per share, excluding underwriting discounts and commissions, for net proceeds$345 million, which were held as treasury stock. During 2018, we acquired 36 million of $1,236 million. The proceeds were used to strengthen our balance sheet and for general corporate purposes, including fundingcommon shares at a portioncost of our Capital Development Program.
There were no share repurchases during 2017 or 2016$700 million under our publicly announced plans or programs.the same program. As of December 31, 20172019 the total remaining share repurchase authorization was $1.5$1.4 billion. Purchases under the program are made at our discretion and may be in either open market transactions, including block purchases, or in privately negotiated transactions using cash on hand, cash generated from operations or proceeds from potential asset sales or cash from available borrowings to acquire shares.sales. This program may be changed based upon our financial condition or changes in market conditions and is subject to termination prior to completion. The repurchase program does not include specific price targets or timetables.

91

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements



23. Leases25. Commitments and Contingencies
Following the sale of our U.K. business to RockRose, we continued to hold outstanding surety bonds which guaranteed our decommissioning liabilities related to the Marathon Oil U.K. LLC assets. We leaseissued these surety bonds in November 2018 with a wide varietynotional value of facilitiesapproximately £92 million and equipment under operating leases, including land, building space, equipment and vehicles. Most long-term leases include renewal options and, in certain leases, purchase options. Future minimum commitments for operating lease obligations having noncancellable lease terms in excess of one year are as follows:
(In millions)Operating Lease Obligations
2018$29
201928
202027
202126
20225
Later years4
Sublease rentals
Total minimum lease payments$119
* Future minimum commitments for capital lease obligations are nil asan expiration date of December 31, 2017.
Operating lease rental expense related2019. RockRose was contractually required to continuing operations was $87 million, $87 million and $99 million in 2017, 2016 and 2015.

24. Commitments and Contingencies
The U.K. tax authorities have challenged the timing of deductibility for certain Brae area decommissioning costs, which we claimed for U.K. corporation tax purposes.  The dispute relatespost a replacement security to the timing of the deduction and does not dispute the general deductibility of decommissioning costs. Incover 2020 by no later than December 1, 2019. During the third quarter of 2017,2019, we recorded a hearing took place at$6 million liability and corresponding expense related to the estimated fair value of our exposure to surety bonds. In November 2019, RockRose posted replacement security and accordingly, we reversed the aforementioned $6 million. See Note 5for discussion of the U.K.’s First-tier Tribunal sale in further detail.
In the second quarter of 2019, Marathon E.G. Production Limited (“MEGPL”), a consolidated and wholly-owned subsidiary, signed a series of agreements to process third-party Alen Unit gas through existing infrastructure located in Punta Europa, E.G. MEGPL is a signatory to the agreements related to our equity method investee, Alba Plant LLC. These agreements contain clauses that cause MEGPL to indemnify the owners of the Alen Unit against actions or inaction by Alba Plant LLC. Pursuant to these agreements, MEGPL agreed to indemnify third party property or events, including environmental assessments, injury to Alba Plant LLC’s personnel, and damage to or loss of Alba Plant LLC’s automobiles. At this time, we cannot reasonably estimate this obligation as we do not have any history of prior indemnification claims, as completion of the plant modifications is not expected to finish until 2021, and as such, we do not have any history of environmental discharge or contamination. Therefore, we have not recorded a liability with respect to this tax deduction.  In the fourth quarter of 2017, we received notification from the U.K.’s First-tier Tribunal that the judge sided with the U.K. tax authorities with respect to the timing of the decommissioning cost deductions.  We intend to appeal this decision and estimate that any revisions to current and deferred tax liabilities, if we do not prevail in the appeals process, would have no cumulative adverse earnings impact on our consolidated results of operations.  In accordance with U.K. regulations, we have paidthese indemnification clauses since the amount of tax and interest in question, approximately $108 million, prior to our appeal.  As a result of the negative ruling we no longer consider this position to be more-likely-than-not to be sustained and have created an uncertain tax position related to the Brae area decommissioning costs.  The payment of the tax and interest to the U.K. tax authoritiespotential future payments under such guarantees is not to settle the position, but a regulatory requirement to appeal in the U.K.  If we ultimately prevail in appeals, the U.K. tax authorities will refund the tax and interest, however, if we ultimately lose in appeals no material future payments related to this issue will be required.  See Note 7 for further detail.determinable.
We are continuouslyroutinely undergoing examination of our U.S. federal income tax returns by the IRS. TheseWith the closure of the 2010-2011 IRS Audit referenced in Note 8, these audits have been completed through the 20142016 tax year except for tax years 2010 and 2011.with the exception of the following item. During the third quarter of 2017, we received a partnership adjustment notification related to the 2010 and 2011 tax years, for which we have filed a Tax Court Petition in the fourth quarter of 2017. We believe that it is more likely than not thatDuring the third quarter of 2019, we will prevail.received the court decision which ruled in our favor for all material items. At December 31, 2019, all issues have been effectively settled related to the partnership audit.
Various groups, including the State of North Dakota and three Indian tribes represented by the Bureau of Indian Affairs, have been involved in a dispute regarding the ownership of certain lands underlying the Missouri River and Little Missouri River.  As a result, as of December 31, 2019, we have recorded a $93 million liability in suspended royalty and working interest revenue, including interest, and have recorded a long-term receivable of $20 million for capital and expenses.
We are a defendant in a number of legal and administrative proceedings arising in the ordinary course of business including, but not limited to, royalty claims, contract claims, tax disputes and environmental claims. While the ultimate outcome and impact to us cannot be predicted with certainty, we believe the resolution of these proceedings will not have a material adverse effect on our consolidated financial position, results of operations or cash flows. Certain of these matters are discussed below.
Environmental matters – We have incurred and will continue to incur capital, operating and maintenance, and remediation expenditures as a result of federal, state, local and foreignenvironmental laws and regulations relating to the environment.regulations. If these expenditures, as with all costs, are not ultimately reflected inoffset by the prices ofwe receive for our products and services, our operating results will be adversely affected.  We believe that substantially all of our competitors must comply with similar environmental laws and regulations.  However, the specific impact on each competitor may vary depending on a number of factors, including the age and location of its operating facilities, marketing areas and production processes. These laws generally provide for control of pollutants released into the environment and require responsible parties to undertake remediation of hazardous waste disposal sites. Penalties may be imposed for noncompliance.
At December 31, 20172019 and 2016,2018, accrued liabilities for remediation were not material. It is not presently possible to estimate the ultimate amount of all remediation costs that might be incurred or the penalties that may be imposed.
MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements


Guarantees We have entered into a performance guarantee related to asset retirement obligations with aggregate maximum potential undiscounted payments totaling $35 million as of December 31, 2017. Under the terms of this guarantee arrangement, we would be required to perform should the guaranteed party fail to fulfill its obligations under the specified arrangements.
Over the years, we have sold various assets in the normal course of our business. Certain of the related agreements contain performance and general guarantees, including guarantees regarding inaccuracies in representations, warranties, covenants and agreements, and environmental and general indemnifications that require us to perform upon the occurrence of a triggering event or condition. These guarantees and indemnifications are part of the normal course of selling assets. We are typically not able to calculate the maximum potential amount of future payments that could be made under such contractual provisions because of the variability inherent in the guarantees and indemnities. Most often, the nature of the guarantees and indemnities is such that there is no appropriate method for quantifying the exposure because the underlying triggering event has little or no past experience upon which a reasonable prediction of the outcome can be based.


92

MARATHON OIL CORPORATION
Notes to Consolidated Financial Statements

Contract commitments At December 31, 20172019 and 2016,2018, contractual commitments to acquire property, plant and equipment totaled $102$41 million and $144$57 million.
In connection with the sale of our operated producing properties in the greater Ewing Bank area and non-operated producing interests in the Petronius and Neptune fields in the Gulf of Mexico, we retained an overriding royalty interest in the properties. As part of the sale agreement, proceeds associated with the production of our override up to $70were $46 million as of December 31, 2019, and are dedicated solely to the satisfaction of the corresponding future abandonment obligations of the properties. The term of our override ends once sales proceeds equal $70 million.

93





Select Quarterly Financial Data (Unaudited)








 2017 2016
(In millions, except per share data)1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr. 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.
Revenues$988
 $993
 $1,162
 $1,230
 $612
 $761
 $861
 $936
Income (loss) from continuing operations before income taxes (a)
(16) (112) (458) 132
 (613) (192) (313) (46)
Income (loss) from continuing operations(50) (153) (599) (28) (360) (138) (206) (1,383)
Discontinued operations (b)
(4,907) 14
 
 
 (47) (32) 14
 12
Net income (loss) (c)
$(4,957) $(139) $(599) $(28) $(407) $(170) $(192) $(1,371)
                
Income (loss) per share:               
Continuing operations$(0.06) $(0.18) $(0.70) $(0.03) $(0.49) $(0.16) $(0.24) $(1.63)
Discontinued operations (b)
$(5.78) $0.02
 $
 $
 $(0.07) $(0.04) $0.01
 $0.01
Basic net income (loss)$(5.84) $(0.16) $(0.70) $(0.03) $(0.56) $(0.20) $(0.23) $(1.62)
Dividends paid per share$0.05
 $0.05
 $0.05
 $0.05
 $0.05
 $0.05
 $0.05
 $0.05
 2019 2018 
(In millions,
except per share data)
1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr. 1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr. 
Revenues from contracts with customers$1,200
 $1,381
 $1,249
 $1,233
 $1,537
 $1,447
 $1,538
 $1,380
 
Income (loss) before income taxes27
(a) 
193
 175
 (3)
(a) 
524
 140
 357
 406
(b) 
Net income (loss)$174
 $161
 $165
 $(20) $356
 $96
 $254
 $390
 
                 
Income (loss) per basic and diluted share:                
Net income (loss)$0.21
 $0.20
 $0.21
 $(0.03) $0.42
 $0.11
 $0.30
 $0.47
 
Dividends paid per share$0.05
 $0.05
 $0.05
 $0.05
 $0.05
 $0.05
 $0.05
 $0.05
 
(a)
Includes impairments to proved propertiesThe first and fourth quarter of $242019 includes mark-to-market loss on commodity derivatives of $113 million and $201 million in the$55 million.
(b)
The fourth and third quarter of 20172018 includes a mark-to-market gain on commodity derivatives of $336 million and $47 million in the third quarter of 2016. Also includes unproved property impairments and exploratory dry well costs of $215$49 million in the thirdfourth quarter of 2017 and $118 million in the second quarter of 2016.2018. (See Item 8. Financial Statements and Supplementary Data - Note 1311 to the consolidated financial statements).
(b)
We closed on the sale of our Canadian business in the second quarter of 2017. The Canadian business is reflected as discontinued operations in all periods presented. Included in Additionally, the first quarter of 2017 is an after-tax non-cash impairment charge of $4.96 billion, primarily related to the property, plant, and equipment.
(c)
Includes the increase of2018 includes a valuation allowancegain on certainsale of our deferred tax assets for $1,346 million in the fourth quarterLibya subsidiary of 2016 (see$255 million. (See Item 8. Financial Statements and Supplementary Data - Note 95 to the consolidated financial statements).







94





Supplementary Information on Oil and Gas Producing Activities (Unaudited)




The supplementary information is disclosed by the following geographic areas: the U.S.; E.G.; Libya; Other Africa, which includes Gabon; and Other International ("(“Other Int’l"Int’l”), which includes the U.K., Gabon and the Kurdistan Region of Iraq. We closed the sale of our Canada business in 2017 and have reflected this business as discontinued operations ("Disc Ops") in all periods presented. See Note 5 forFor further details on our Canadian disposition.dispositions that affect the information included in this supplemental information, see Note 5.
Preparation of Reserve Estimates
All estimates of reserves are made in compliance with SEC Rule 4-10 of Regulation S-X. Crude oil and condensate, NGL,NGLs, natural gas and our historical synthetic crude oil reserve estimates are reviewed and approved by our Corporate Reserves Group ("CRG"(“CRG”), which includes our Director of Corporate Reserves and his staff of Reserve Coordinators. Crude oil and condensate, NGLs and natural gas reserve estimates are developed or reviewed by Qualified Reserves Estimators ("QREs"(“QREs”). QREs are petro-technical professionals located throughout our organization who meet the qualifications we have established for employees engaged in estimating reserves and resources. QREs have the education, experience, and training necessary to estimate reserves and resources in a manner consistent with all external reserve estimation regulations and internal resource estimation directives and practices. QREs generally hold at least a Bachelor of Science degree in the appropriate technical field, have a minimum of threefive years of industry experience with at least one yearthree years in reserve estimation and have completed our QRE training course. All reserves changes (including proved) must be approved by theour CRG. Additionally, any change to proved reserve estimates in excess of 5 mmboe on a total field basis, within a single month, must be approved by the Director of Corporate Reserves.
The Director of Corporate Reserves, who reports to our Chief Financial Officer, has a Bachelor of Science degree in petroleum engineering and is a registered Professional Engineer in the State of New Mexico. In his 3133 years with Marathon Oil, he has held numerous engineering and management positions, including more recently managing reservoir engineering and geoscience for our Eagle Ford development in South Texas. He is a 25 year member of the Society of Petroleum Engineers ("SPE"(“SPE”).
Technologies used in proved reserves estimation includes statistical analysis of production performance, decline curve analysis, pressure and rate transient analysis, pressure gradient analysis, reservoir simulation and volumetric analysis. The observed statistical nature of production performance coupled with highly certain reservoir continuity or quality within the reliable technology areas and sufficient proved developed locations establish the reasonable certainty criteria required for booking proved reserves.
Historical estimates of synthetic crude oil reserves were prepared by GLJ Petroleum Consultants of Calgary, Alberta, Canada, third-party consultants for 2015. Their report was filed as an exhibit to the prior year Annual Report on Form 10-K. The individual responsible for the estimates of our synthetic crude oil reserves had 15 years of experience in petroleum engineering, has conducted surface mineable oil sands evaluations since 2009 and is a registered Practicing Professional Engineer in the Province of Alberta.
Audits of Estimates
We have established a robust series of internal controls, policies and processes intended to ensure the quality and accuracy of our internal reserve estimates. We also engage third-party consultants to provide, at a minimum, independentaudit our estimates of proved reserves. Our policy requires that audits are provided for fields that comprise at least 80% of our total proved reserves over a rolling four-year period.period, adjusted for dispositions. We exceeded this percentageconduct our audits on a one-year in arrears basis and accordingly, our third-party consultants have not yet performed any audits of our reserve estimates for the year-ended December 31, 2019. In calculating our proved reserve audit coverage percentage, we only include the most recent year a field was audited within the rolling four-year period endedperiod. To illustrate, our third-party proved reserve audits conducted during 2019 were for reserve estimates as of December 31, 2018 and covered reserves in Oklahoma (284 mmboe) and Eagle Ford (386 mmboe). The reserve audits conducted during 2018 were for reserve estimates as of December 31, 2017 with 84%and included reserves in Bakken (321 mmboe), which is reflected net of 2018 production in calculating our audit coverage as of December 31, 2019. The reserve audits conducted during 2017 were for reserve estimates as of December 31, 2016 and included reserves in Equatorial Guinea (151 mmboe), which is reflected net of 2017 and 2018 production in calculating our audit coverage as of December 31, 2019. On this basis, our third-party reserve audits covered 92% of our total proved reserves, independently audited.excluding dispositions. An audit tolerance at a field level of +/- 10% to our internal estimates has been established. ShouldAll audits conducted during this period fell within the third-party consultants’ initial analysis fall outside our tolerance band, both parties will re-examineestablished tolerance.
For the information provided, request additional data and refine their analysis, if appropriate. In the very limited instances where differences outside the 10% tolerance cannot be resolved by year end, a plan to resolve the difference is developed and executive management consent is obtained. The audit process did not result in any significant changes to our reserve estimates for 2017,as of December 31, 2016, or 2015.
During 2017, 2016 and 2015, Netherland, Sewell & Associates, Inc. (“NSAI”) prepared a reserves certification for the Alba field in E.G. The NSAI summary reports arereport is filed as an exhibit to this Annual Report on Form 10-K. Members of the NSAI team have multiple years of industry experience, having worked for large, international oil and gas companies before joining NSAI. NSAI’s technical team members meet or exceed the education, training, and experience requirements set forth in the Standards Pertaining to the Estimating and Auditing of Oil and Gas Reserves Information promulgated by the Society of Petroleum Engineers.SPE. The senior technical advisor has over 1315 years of practical experience in petroleum engineering and the estimation and evaluation of reserves and is a registered Professional Engineer in the State of Texas. The second team member has over 1113 years of practical experience in petroleum geosciences and is a licensed Professional Geoscientist in the State of Texas.
Ryder Scott Company also performed audits of the prior years' reserves for severalreserve estimates of our fields in 2017, 2016as of December 31, 2018 and 2015.2017. Their summary reports are filed as exhibits to this Annual Report on Form 10-K. The team lead for Ryder Scott has over 3537 years of industry experience, having worked for a major financial advisory services group before joining Ryder Scott. He is a 2625 year member of SPE and is a registered Professional Engineer in the State of Texas.



95



Supplementary Information on Oil and Gas Producing Activities (Unaudited)




EstimatedQuantities of Proved Oil and Gas Reserves
The estimation of net recoverable quantities of crude oil and condensate, natural gas liquids,NGLs, natural gas and our historical synthetic crude oil is a highly technical process which is based upon several underlying assumptions that are subject to change. Proved reserves are determined using "SEC Pricing"“SEC Pricing”, calculated as an unweighted arithmetic average of the first-day-of-the-month closing price for each month. See As discussed in Item 1A. Risk Factors and Item 7. Management’s Discussion and Analysis of Financial Condition Cash Flows and LiquidityResults of Operations – Critical Accounting Estimates – Estimated Quantities, commodity prices are volatile which can have an impact on proved reserves. If crude oil prices in the future average below prices used to determine proved reserves at December 31, 2019, it could have an adverse effect on our estimates of Net Reserves for the table providing our 2017 SEC pricing of benchmark pricesproved reserve volumes and the underlying assumptions used.value of our business. Future reserve revisions could also result from changes in capital funding, drilling plans and governmental regulation, among other things. It is difficult to estimate the magnitude of any potential price change and the effect on proved reserves, due to numerous factors (including future crude oil price and performance revisions).
The table below provides the 20172019 SEC pricing for certain benchmark prices:
SEC Pricing 20172019 SEC Pricing
WTI Crude oil (per bbl)$51.34
$55.69
Henry Hub natural gas (per mmbtu)$2.98
$2.58
Brent crude oil (per bbl)$54.39
$63.15
Mont Belvieu NGLs (per bbl)$22.03
$18.41












































































96




Supplementary Information on Oil and Gas Producing Activities (Unaudited)




Estimated Quantities of Proved Oil and Gas Reserves
(mmbbl)U.S. 
E.G.(a)
 Libya Other Int'l Cont Ops Disc Ops TotalU.S. 
E.G.(a)
 
Libya(b)
 
Other Int'l(c)
 
Cont Ops(d)
Crude oil and condensate                      
Proved developed and undeveloped reserves:
Beginning of year - 2015634
 57
 208
 29
 928
 
 928
Beginning of year - 2017563
 45
 172
 22
 802
Revisions of previous estimates(57) 2
 (7) (2) (64) 
 (64)9
 (2) 
 8
 15
Improved recovery1
 
 
 
 1
 
 1
Purchases of reserves in place
 
 
 
 
 
 
18
 
 
 
 18
Extensions, discoveries and             
other additions70
 
 
 
 70
 
 70
Production(62) (7) 
 (5) (74) 
 (74)
Sales of reserves in place(6) 
 
 
 (6) 
 (6)
End of year - 2015580
 52
 201
 22
 855
 
 855
Revisions of previous estimates55
 1
 (28) 3
 31
 
 31
Improved recovery4
 
 
 
 4
 
 4
Purchases of reserves in place12
 
 
 
 12
 
 12
Extensions, discoveries and             
other additions37
 
 
 1
 38
 
 38
Production(48) (8) (1) (4) (61) 
 (61)
Sales of reserves in place(77) 
 
 
 (77) 
 (77)
End of year - 2016563
 45
 172
 22
 802
 
 802
Revisions of previous estimates9
 (2) 
 8
 15
 
 15
Improved recovery
 
 
 
 
 
 
Purchases of reserves in place18
 
 
 
 18
 
 18
Extensions, discoveries and             
other additions30
 4
 
 
 34
 
 34
Extensions, discoveries and other additions30
 4
 
 
 34
Production(49) (8) (7) (4) (68) 
 (68)(49) (8) (7) (4) (68)
Sales of reserves in place(1) 
 
 
 (1) 
 (1)(1) 
 
 
 (1)
End of year - 2017570
 39
 165
 26
 800
 
 800
570
 39
 165
 26
 800
Revisions of previous estimates49
 3
 
 3
 55
Extensions, discoveries and other additions42
 
 
 2
 44
Production(63) (6) (3) (5) (77)
Sales of reserves in place(3) 
 (162) (1) (166)
End of year - 2018595
 36
 
 25
 656
Revisions of previous estimates34
 3
 
 
 37
Purchases of reserves in place9
 
 
 
 9
Extensions, discoveries and other additions53
 
 
 
 53
Production(69) (6) 
 (2) (77)
Sales of reserves in place(3) 
 
 (23) (26)
End of year - 2019619
 33
 
 
 652
Proved developed reserves:                      
Beginning of year - 2015294
 30
 175
 19
 518
 
 518
End of year - 2015327
 25
 173
 16
 541
 
 541
End of year - 2016238
 45
 172
 13
 468
 
 468
Beginning of year - 2017238
 45
 172
 13
 468
End of year - 2017263
 39
 165
 17
 484
 
 484
263
 39
 165
 17
 484
End of year - 2018287
 36
 
 22
 345
End of year - 2019304
 30
 
 
 334
Proved undeveloped reserves:                      
Beginning of year - 2015340
 27
 33
 10
 410
 
 410
End of year - 2015253
 27
 28
 6
 314
 
 314
End of year - 2016325
 
 
 9
 334
 
 334
Beginning of year - 2017325
 
 
 9
 334
End of year - 2017307
 
 
 9
 316
 
 316
307
 
 
 9
 316
End of year - 2018308
 
 
 3
 311
End of year - 2019315
 3
 
 
 318














97




Supplementary Information on Oil and Gas Producing Activities (Unaudited)




Estimated Quantities of Proved Oil and Gas Reserves (continued)
(mmbbl)U.S. 
E.G.(a)
 Libya Other Int'l Cont Ops Disc Ops TotalU.S. 
E.G.(a)
 
Libya(b)
 
Other Int'l(c)
 
Cont Ops(d)
Natural gas liquids                      
Proved developed and undeveloped reserves:
Beginning of year - 2015161
 30
 
 1
 192
 
 192
Beginning of year - 2017170
 24
 
 
 194
Revisions of previous estimates(7) 2
 
 (1) (6) 
 (6)37
 3
 
 
 40
Improved recovery
 
 
 
 
 
 
Purchases of reserves in place
 
 
 
 
 
 
5
 
 
 
 5
Extensions, discoveries and             
other additions33
 
 
 
 33
 
 33
Production(14) (4) 
 
 (18) 
 (18)
Sales of reserves in place(1) 
 
 
 (1) 
 (1)
End of year - 2015172
 28
 
 
 200
 
 200
Revisions of previous estimates(8) 
 
 
 (8) 
 (8)
Improved recovery
 
 
 
 
 
 
Purchases of reserves in place12
 
 
 
 12
 
 12
Extensions, discoveries and             
other additions11
 
 
 
 11
 
 11
Production(14) (4) 
 
 (18) 
 (18)
Sales of reserves in place(3) 
 
 
 (3) 
 (3)
End of year - 2016170
 24
 
 
 194
 
 194
Revisions of previous estimates37
 3
 
 
 40
 
 40
Improved recovery
 
 
 
 
 
 
Purchases of reserves in place5
 
 
 
 5
 
 5
Extensions, discoveries and             
other additions34
 2
 
 
 36
 
 36
Extensions, discoveries and other additions34
 2
 
 
 36
Production(16) (4) 
 
 (20) 
 (20)(16) (4) 
 
 (20)
Sales of reserves in place(1) 
 
 
 (1) 
 (1)(1) 
 
 
 (1)
End of year - 2017229
 25
 
 
 254
 
 254
229
 25
 
 
 254
Revisions of previous estimates(9) 1
 
 
 (8)
Extensions, discoveries and other additions25
 
 
 
 25
Production(20) (4) 
 
 (24)
Sales of reserves in place(1) 
 
 
 (1)
End of year - 2018224
 22
 
 
 246
Revisions of previous estimates(21) 2
 
 
 (19)
Purchases of reserves in place5
 
 
 
 5
Extensions, discoveries and other additions19
 
 
 
 19
Production(22) (3) 
 
 (25)
Sales of reserves in place(1) 
 
 
 (1)
End of year - 2019204
 21
 
 
 225
Proved developed reserves:                      
Beginning of year - 201568
 15
 
 
 83
 
 83
End of year - 201592
 12
 
 
 104
 
 104
End of year - 201678
 24
 
 
 102
 
 102
Beginning of year - 201778
 24
 
 
 102
End of year - 2017118
 25
 
 
 143
 
 143
118
 25
 
 
 143
End of year - 2018119
 22
 
 
 141
End of year - 2019122
 19
 
 
 141
Proved undeveloped reserves:                      
Beginning of year - 201593
 15
 
 1
 109
 
 109
End of year - 201580
 16
 
 
 96
 
 96
End of year - 201692
 
 
 
 92
 
 92
Beginning of year - 201792
 
 
 
 92
End of year - 2017111
 
 
 
 111
 
 111
111
 
 
 
 111
End of year - 2018105
 
 
 
 105
End of year - 201982
 2
 
 
 84
















98




Supplementary Information on Oil and Gas Producing Activities (Unaudited)




Estimated Quantities of Proved Oil and Gas Reserves (continued)
(bcf)U.S. 
E.G.(a)
 Libya Other Int'l Cont Ops Disc Ops Total
Natural gas             
Proved developed and undeveloped reserves:
Beginning of year - 20151,144
 1,205
 209
 22
 2,580
 
 2,580
Revisions of previous estimates(22) 35
 (3) 1
 11
 
 11
Improved recovery
 
 
 
 
 
 
Purchases of reserves in place1
 
 
 
 1
 
 1
Extensions, discoveries and             
other additions225
 
 
 
 225
 
 225
Production (b)
(128) (150) 
 (8) (286) 
 (286)
Sales of reserves in place(69) 
 
 
 (69) 
 (69)
End of year - 20151,151
 1,090
 206
 15
 2,462
 
 2,462
Revisions of previous estimates145
 8
 (1) 3
 155
 
 155
Improved recovery
 
 
 
 
 
 
Purchases of reserves in place61
 
 
 
 61
 
 61
Extensions, discoveries and             
other additions71
 
 
 
 71
 
 71
Production (b)
(115) (155) 
 (8) (278) 
 (278)
Sales of reserves in place(25) 
 
 
 (25) 
 (25)
End of year - 20161,288
 943
 205
 10
 2,446
 
 2,446
Revisions of previous estimates(33) (18) 
 4
 (47) 
 (47)
Improved recovery
 
 
 
 
 
 
Purchases of reserves in place36
 
 
 
 36
 
 36
Extensions, discoveries and             
other additions204
 76
 
 
 280
 
 280
Production (b)
(127) (168) (1) (6) (302) 
 (302)
Sales of reserves in place(44) 
 
 
 (44) 
 (44)
End of year - 20171,324
 833
 204
 8
 2,369
 
 2,369
Proved developed reserves:             
Beginning of year - 2015575
 664
 94
 17
 1,350
 
 1,350
End of year - 2015640
 552
 94
 11
 1,297
 
 1,297
End of year - 2016648
 943
 95
 5
 1,691
 
 1,691
End of year - 2017726
 833
 94
 2
 1,655
 
 1,655
Proved undeveloped reserves:             
Beginning of year - 2015569
 541
 115
 5
 1,230
 
 1,230
End of year - 2015511
 538
 112
 4
 1,165
 
 1,165
End of year - 2016640
 
 110
 5
 755
 
 755
End of year - 2017598
 
 110
 6
 714
 
 714
(bcf)U.S. 
E.G.(a)
 
Libya(b)
 
Other Int'l(c)
 
Cont Ops(d)
Natural gas         
Proved developed and undeveloped reserves:
Beginning of year - 20171,288
 943
 205
 10
 2,446
Revisions of previous estimates(33) (18) 
 4
 (47)
Purchases of reserves in place36
 
 
 
 36
Extensions, discoveries and other additions204
 76
 
 
 280
Production(e)
(127) (168) (1) (6) (302)
Sales of reserves in place(44) 
 
 
 (44)
End of year - 20171,324
 833
 204
 8
 2,369
Revisions of previous estimates188
 35
 
 4
 227
Extensions, discoveries and other additions198
 
 
 
 198
Production(e)
(156) (153) (1) (5) (315)
Sales of reserves in place(1) 
 (203) 
 (204)
End of year - 20181,553
 715
 
 7
 2,275
Revisions of previous estimates(223) 108
 
 
 (115)
Purchases of reserves in place28
 
 
 
 28
Extensions, discoveries and other additions118
 
 
 
 118
Production(e)
(160) (133) 
 (3) (296)
Sales of reserves in place(38) 
 
 (4) (42)
End of year - 20191,278
 690
 
 
 1,968
Proved developed reserves:         
Beginning of year - 2017648
 943
 95
 5
 1,691
End of year - 2017726
 833
 94
 2
 1,655
End of year - 2018869
 715
 
 7
 1,591
End of year - 2019825
 649
 
 
 1,474
Proved undeveloped reserves:         
Beginning of year - 2017640
 
 110
 5
 755
End of year - 2017598
 
 110
 6
 714
End of year - 2018684
 
 
 
 684
End of year - 2019453
 41
 
 
 494















99




Supplementary Information on Oil and Gas Producing Activities (Unaudited)




Estimated Quantities of Proved Oil and Gas Reserves (continued)
(mmbbl)U.S. 
E.G.(a)
 Libya Other Int'l Cont Ops Disc Ops Total
Synthetic crude oil             
Proved developed and undeveloped reserves:
Beginning of year - 2015
 
 
 
 
 648
 648
Revisions of previous estimates
 
 
 
 
 67
 67
Improved recovery
 
 
 
 
 
 
Purchases of reserves in place
 
 
 
 
 
 
Extensions, discoveries and             
other additions
 
 
 
 
 
 
Production
 
 
 
 
 (17) (17)
Sales of reserves in place
 
 
 
 
 
 
End of year - 2015
 
 
 
 
 698
 698
Revisions of previous estimates
 
 
 
 
 12
 12
Improved recovery
 
 
 
 
 
 
Purchases of reserves in place
 
 
 
 
 
 
Extensions, discoveries and             
other additions
 
 
 
 
 
 
Production
 
 
 
 
 (18) (18)
Sales of reserves in place
 
 
 
 
 
 
End of year - 2016
 
 
 
 
 692
 692
Revisions of previous estimates
 
 
 
 
 
 
Improved recovery
 
 
 
 
 
 
Purchases of reserves in place
 
 
 
 
 
 
Extensions, discoveries and             
other additions
 
 
 
 
 
 
Production
 
 
 
 
 (7) (7)
Sales of reserves in place
 
 
 
 
 (685) (685)
End of year - 2017
 
 
 
 
 
 
Proved developed reserves:             
Beginning of year - 2015
 
 
 
 
 644
 644
End of year - 2015
 
 
 
 
 698
 698
End of year - 2016
 
 
 
 
 692
 692
End of year - 2017
 
 
 
 
 
 
Proved undeveloped reserves:             
Beginning of year - 2015
 
 
 
 
 4
 4
End of year - 2015
 
 
 
 
 
 
End of year - 2016
 
 
 
 
 
 
End of year - 2017
 
 
 
 
 
 
(mmbbl)Disc Ops
Synthetic crude oil
Proved developed and undeveloped reserves:
Beginning of year - 2017692
Production(7)
Sales of reserves in place(685)
End of year - 2017
Proved developed reserves:
Beginning of year - 2017692
End of year - 2017
Proved undeveloped reserves:
Beginning of year - 2017
End of year - 2017

















100




Supplementary Information on Oil and Gas Producing Activities (Unaudited)




Estimated Quantities of Proved Oil and Gas Reserves (continued)
(mmboe)U.S. 
E.G.(a)
 Libya Other Int'l Cont Ops Disc Ops Total
Total Proved Reserves             
Proved developed and undeveloped reserves:
Beginning of year - 2015986
 288
 243
 33
 1,550
 648
 2,198
Revisions of previous estimates(67) 8
 (8) (2) (69) 67
 (2)
Improved recovery1
 
 
 
 1
 
 1
Purchases of reserves in place1
 
 
 
 1
 
 1
Extensions, discoveries and             
other additions139
 1
 
 
 140
 
 140
Production (b)
(98) (36) 
 (6) (140) (17) (157)
Sales of reserves in place(18) 
 
 
 (18) 
 (18)
End of year - 2015944
 261
 235
 25
 1,465
 698
 2,163
Revisions of previous estimates73
 2
 (28) 4
 51
 12
 63
Improved recovery4
 
 
 
 4
 
 4
Purchases of reserves in place34
 
 
 
 34
 
 34
Extensions, discoveries and             
other additions59
 
 
 1
 60
 
 60
Production (b)
(82) (37) (1) (6) (126) (18) (144)
Sales of reserves in place(84) 
 
 
 (84) 
 (84)
End of year - 2016948
 226
 206
 24
 1,404
 692
 2,096
Revisions of previous estimates42
 (1) 
 8
 49
 
 49
Improved recovery
 
 
 
 
 
 
Purchases of reserves in place28
 
 
 
 28
 
 28
Extensions, discoveries and             
other additions98
 18
 
 
 116
 
 116
Production (b)
(86) (40) (7) (5) (138) (7) (145)
Sales of reserves in place(10) 
 
 
 (10) (685) (695)
End of year - 20171,020
 203
 199
 27
 1,449
 
 1,449
Proved developed reserves:             
Beginning of year - 2015458
 155
 191
 22
 826
 644
 1,470
End of year - 2015526
 129
 189
 18
 862
 698
 1,560
End of year - 2016424
 226
 188
 14
 852
 692
 1,544
End of year - 2017502
 203
 181
 17
 903
 
 903
Proved undeveloped reserves:             
Beginning of year - 2015528
 133
 52
 11
 724
 4
 728
End of year - 2015418
 132
 46
 7
 603
 
 603
End of year - 2016524
 
 18
 10
 552
 
 552
End of year - 2017518
 
 18
 10
 546
 
 546

(mmboe)U.S. 
E.G.(a)
 
Libya(b)
 
Other Int'l(c)
 
Cont Ops(d)
 Disc Ops Total
Total Proved Reserves             
Proved developed and undeveloped reserves:
Beginning of year - 2017948
 226
 206
 24
 1,404
 692
 2,096
Revisions of previous estimates42
 (1) 
 8
 49
 
 49
Purchases of reserves in place28
 
 
 
 28
 
 28
Extensions, discoveries and
other additions
98
 18
 
 
 116
 
 116
Production(e)
(86) (40) (7) (5) (138) (7) (145)
Sales of reserves in place(10) 
 
 
 (10) (685) (695)
End of year - 20171,020
 203
 199
 27
 1,449
 
 1,449
Revisions of previous estimates71
 8
 
 5
 84
 
 84
Extensions, discoveries and
other additions
100
 
 
 2
 102
 
 102
Production(e)
(109) (35) (3) (6) (153) 
 (153)
Sales of reserves in place(4) 
 (196) (1) (201) 
 (201)
End of year - 20181,078
 176
 
 27
 1,281
 
 1,281
Revisions of previous estimates(23) 24
 
 
 1
 
 1
Purchases of reserves in place18
 
 
 
 18
 
 18
Extensions, discoveries and
other additions
91
 
 
 
 91
 
 91
Production(e)
(117) (31) 
 (3) (151) 
 (151)
Sales of reserves in place(11) 
 
 (24) (35) 
 (35)
End of year - 20191,036
 169
 
 
 1,205
 
 1,205
Proved developed reserves:             
Beginning of year - 2017424
 226
 188
 14
 852
 692
 1,544
End of year - 2017502
 203
 181
 17
 903
 
 903
End of year - 2018552
 176
 
 24
 752
 
 752
End of year - 2019563
 158
 
 
 721
 
 721
Proved undeveloped reserves:             
Beginning of year - 2017524
 
 18
 10
 552
 
 552
End of year - 2017518
 
 18
 10
 546
 
 546
End of year - 2018526
 
 
 3
 529
 
 529
End of year - 2019473
 11
 
 
 484
 
 484
(a) 
Consists of estimated reserves from properties governed by production sharing contracts.
(b) 
In 2018, we closed on the sale of our subsidiary, Marathon Oil Libya Limited.
(c)
In 2019, we closed on the sale of our U.K. business and our non-operated interested in the Atrush block of Kurdistan. These volumes are reflected in Other Int’l in the tables above for the periods presented.
(d)
Continuing operations (“Cont Ops”) excludes the sale of our Canada business which was reflected as discontinued operations (“Disc Ops”) in 2017. Proved reserves in our Canada business consisted entirely of synthetic crude oil.
(e)
Excludes the resale of purchased natural gas used in reservoir management.



101



Supplementary Information on Oil and Gas Producing Activities (Unaudited)




20172019 proved reserves decreased by 64776 mmboe primarily due to the following:
Revisions of previous estimates:Increased by 1 mmboe as referenced below:
Increases:
Revisions of previous estimates: Increased by 4920 mmboe primarilyassociated with wells to sales that were additions to the plan
11 mmboe associated with planned compression in E.G.
11 mmboe due to the acceleration of higher economic wellstechnical revisions in E.G.
Decreases:
24 mmboe due to reduced commodity pricing
12 mmboe due to technical revisions in the Bakken intoU.S. resource plays
5 mmboe due to changes in the 5-year plan resulting in an increase of 44 mmboe, with the remainder being due to revisions across the business.U.S. resource plays
Purchases of reserves in place:Increased by 18 mmboe due to the acquisition in the Eagle Ford.
Extensions, discoveries, and other additions:Increased by 91 mmboe in the U.S. resource plays as referenced below:
Increases:
Extensions, discoveries, and other additions: Increased by 116 mmboe primarily due to an increase of 9753 mmboe associated with the expansion of proved areas and
38 mmboe associated with wells to sales from unproved categories in Oklahoma.
Production: Decreased by 151 mmboe.
Sales of reserves in place:Decreased by 35 mmboe as referenced below:
Decreases:
Purchases of reserves in place: Increased by 28 mmboe from acquisitions of assets in the Northern Delaware Basin in New Mexico.
Production: Decreased by 145 mmboe.
Sales of reserves in place: Decreased by 695 mmboe including 68519 mmboe associated with the sale of our Canadian business and 10assets in the U.K.
11 mmboe associated with divestitures of certain conventionalU.S. assets
5 mmboe associated with the sale of the Atrush block in Oklahoma and Colorado. See Item 8. Financial Statements and Supplementary Data - Note 5 to the consolidated financial statements for information regarding these dispositions.
Kurdistan


20162018 proved reserves decreased by 67168 mmboe primarily due to the following:
Revisions of previous estimates: Increased by 84 mmboe as referenced below:
Increases:
Revisions of previous estimates: Increased by 63 mmboe primarily due to an increase of 151108 mmboe associated with the acceleration of higher economic wells in the U.S. resource plays into the 5-year plan and a decrease of 64
15 mmboe associated with wells to sales that were additions to the plan
Decreases:
39 mmboe due to U.S. technical revisions.revisions across the business
Extensions, discoveries, and other additions: Increased by 60
Extensions, discoveries, and other additions: Increased by 102 mmboe primarily in the U.S. resource plays as referenced below:
Increases:
69 mmboe associated with the expansion of proved areas and new
33 mmboe associated with wells to sales from unprovenunproved categories in Oklahoma.
Production: Decreased by 153 mmboe.
Sales of reserves in place:Decreased by 201 mmboe as referenced below:
Decreases:
Purchases of reserves in place: Increased by 34 mmboe from acquisition of STACK assets in Oklahoma.
Production: Decreased by 144 mmboe.
Sales of reserves in place: Decreased by 84196 mmboe associated with the sale of our subsidiary in Libya
4 mmboe associated with divestitures of certain Wyomingconventional assets in New Mexico and GulfMichigan
1 mmboe associated with the sale of Mexico assets.
the Sarsang block in Kurdistan

20152017 proved reserves decreased by 35647 mmboe primarily due to the following:
Revisions of previous estimates:Increased by 49 mmboe as referenced below:
Increases:
44 mmboe due to the acceleration of higher economic wells in the Bakken into the 5-year plan
The remainder being due to revisions across the business
Extensions, discoveries, and other additions: Increased by 116 mmboe primarily due to an increase of 97 mmboe associated with the expansion of proved areas and wells to sales from unproved categories in Oklahoma.
Purchases of reserves in place: Increased by 28 mmboe from acquisitions of assets in the Northern Delaware Basin in New Mexico.
Production:Decreased by 145 mmboe.

Revisions of previous estimates: Decreased by 2 mmboe primarily resulting from an increase of 105102



Supplementary Information on Oil and Gas Producing Activities (Unaudited)


Sales of reserves in place: Decreased by 695 mmboe as referenced below:
Increases:
685 mmboe associated with drilling programs in U.S. resource plays and an increasethe sale of 67 mmboe in discontinued operations due to technical reevaluation and lower royalty percentages related to lower realized prices, offset by a decrease of 173 mmboe which was largely due to reductions to our capital development program and adherence to the SEC 5-year rule.Canadian business
10 mmboe associated with divestitures of certain conventional assets in Oklahoma and Colorado. See Item 8. Financial Statements and Supplementary Data - Note 5 to the consolidated financial statements for information regarding these dispositions.

Extensions, discoveries, and other additions: Increased by140 mmboe as a result of drilling programs in our U.S. resource plays.
Production: Decreased by 157 mmboe.
Sales of reserves in place: U.S. conventional assets sales contributed to a decrease of 18 mmboe.

Changes in Proved Undeveloped Reserves
As of December 31, 2017, 546 mmboe of proved undeveloped reserves were reported, a decrease of 6 mmboe from December 31, 2016. The following table shows changes in proved undeveloped reserves for 2017:2019:
(mmboe) 
Beginning of year552529

Revisions of previous estimates518
Improved recovery

Purchases of reserves in place1513

Extensions, discoveries, and other additions5768

Dispositions(5
)
Transfers to proved developed(83139)
End of year546484

Revisions of prior estimates. Revisions of prior estimates increased estimates:Increased by 18 mmboe as referenced below:
Increases:
16 mmboe associated with in-year drill schedule changes
11 mmboe associated with planned compression in E.G.
Decreases:
5 mmboe during 2017, primarily due to a 44 mmboe increasechanges in the Bakken from an acceleration of higher economic wells into the 5-year plan offset by a decrease of 40in the U.S. resource plays
4 mmboe in Oklahoma due to the removal of less economic wells from the 5-year plan.technical revisions
Extensions, discoveries and other additions.additions:Increased 57by 68 mmboe throughassociated with expansion of proved areas in Oklahoma.the U.S. resource plays as referenced below:

Increases:

28 mmboe in Oklahoma
Supplementary Information on Oil and Gas Producing Activities (Unaudited)25 mmboe in Permian

15 mmboe in Bakken

Transfers to proved developed. 83developed:139 mmboe of PUD reserves were converted to proved developed status during 2017,2019, primarily from assets in our U.S. resource plays. This 20172019 transfer equates to a 15%26% PUD conversion rate and a 5-year average annual PUD conversion rate during the 2013-20172015-2019 period of 18%20%. All proved undeveloped reserve drilling locations are scheduled to be drilled prior to the end of 2022.
A total of 25 mmboe of proved undeveloped reserves, or less than 2%producing within five years of the company’s total proved reserves, have beeninitial booking date.











103



Supplementary Information on the books beyond 5 years as of year-end 2017.Oil and Gas Producing Activities (Unaudited)
As of year-end 2017, there were 18 mmboe of proved undeveloped reserves, initially disclosed in 2012, associated with the Faregh Phase II project in Libya. Drilling operations and construction of the associated gas plant were completed in 2010. Final commissioning was halted in 2011 and again in 2013 due to civil unrest and subsequent declaration of Force Majeure.  In 2017, teams conducted an assessment of the facilities to determine the state of the equipment and developed a plan to recommission the plant and initiate production in 2018, at which time, all associated proved undeveloped reserves will be transferred to proved developed.
As of year-end 2017, there were 7 mmboe of proved undeveloped reserves, initially disclosed in 2011, associated with the Fuel Gas Deficiency project in the U.K. The project includes the design, procurement and installation of the Brae Bravo gas by-pass, which will ensure continued operations at the existing Brae Alpha and East Brae platforms. The project has been approved and work is underway with completion expected in 2018, at which time, all associated proved undeveloped reserves will be transferred to proved developed.
Costs Incurred & Future Costs to Develop
Costs incurred in 2017, 20162019, 2018 and 20152017 relating to the development of proved undeveloped reserves were $842$1,261 million, $359$1,082 million and $1,415$842 million. As of December 31, 2017,
The following table shows future development costs estimated to be required for the development of proved undeveloped crude oil and condensate, NGLs and natural gas reserves for the years 2018 through 2022 are projected to be $1,425 million, $1,348 million, $1,409 million, $1,458 million and $1,028 million.future years.

(In millions)Future Development Costs
2020$1,464
20211,568
20221,562
20231,456
2024913

Capitalized Costs and Accumulated Depreciation, Depletion and Amortization
Year Ended December 31,
(In millions)U.S. E.G. Libya Other Africa Other Int'l TotalU.S. E.G. Other Int’l Total
2017 Capitalized Costs:           
Year Ended December 31, 2019       
Capitalized Costs:       
Proved properties$27,477
 $1,990
 830
 $
 $5,050
 $35,347
$29,250
 $2,042
 $
 $31,292
Unproved properties2,755
 110
 217
 43
 33
 3,158
2,880
 12
 
 2,892
Total30,232
 2,100
 1,047
 43
 5,083
 38,505
32,130
 2,054
 
 34,184
Accumulated depreciation,          
depletion and amortization:          
Accumulated depreciation, depletion and amortization:      
Proved properties14,254
 1,348
 289
 
 4,850
 20,741
15,435
 1,568
 
 17,003
Unproved properties (a)
206
 
 
 43
 33
 282
357
 (7) 
 350
Total14,460
 1,348
 289
 43
 4,883
 21,023
15,792
 1,561
 
 17,353
Net capitalized costs$15,772
 $752
 $758
 $
 $200
 $17,482
$16,338
 $493
 $
 $16,831
2016 Capitalized Costs:          
Year Ended December 31, 2018       
Capitalized Costs:      
Proved properties$25,497
 $1,978
 $756
 $
 $5,864
 $34,095
$27,983
 $2,041
 $4,828
 $34,852
Unproved properties1,473
 119
 281
 136
 183
 2,192
2,977
 11
 
 2,988
Total26,970
 2,097
 1,037
 136
 6,047
 36,287
30,960
 2,052
 4,828
 37,840
Accumulated depreciation,          
depletion and amortization:          
Accumulated depreciation, depletion and amortization:      
Proved properties12,526
 1,216
 268
 1
 5,246
 19,257
14,742
 1,471
 4,706
 20,919
Unproved properties (a)
382
 2
 
 
 113
 497
299
 (7) 
 292
Total12,908
 1,218
 268
 1
 5,359
 19,754
15,041
 1,464
 4,706
 21,211
Net capitalized costs$14,062
 $879
 $769
 $135
 $688
 $16,533
$15,919
 $588
 $122
 $16,629
(a)
Includes unproved property impairments (see Note 11).
(a) Includes unproved property impairments (see Note 10).

104




Supplementary Information on Oil and Gas Producing Activities (Unaudited)




Costs Incurred for Property Acquisition, Exploration and Development (a) 
(In millions)U.S. E.G. Libya 
Other
Africa
 Other Int'l Cont Ops Disc Ops TotalU.S. E.G. Libya Other Int’l Cont Ops Disc Ops Total
December 31, 2019             
Property acquisition:             
Proved$93
 $
 $
 $
 $93
 $
 $93
Unproved282
 
 
 
 282
 
 282
Exploration862
 
 
 
 862
 
 862
Development1,675
 1
 
 23
 1,699
 
 1,699
Total$2,912
 $1
 $
 $23
 $2,936
 $
 $2,936
December 31, 2018             
Property acquisition:             
Proved$211
 $
 $
 $11
 $222
 $
 $222
Unproved144
 
 
 
 144
 
 144
Exploration929
 1
 
 (9) 921
 
 921
Development1,332
 (2) 
 (126)
(b) 
1,204
 
 1,204
Total$2,616
 $(1) $
 $(124) $2,491
 $
 $2,491
December 31, 2017                            
Property acquisition:                            
Proved$191
 $1
 $
 $
 $
 $192
 $
 $192
$191
 $1
 $
 $
 $192
 $
 $192
Unproved1,746
 
 
 1
 
 1,747
 
 1,747
1,746
 
 
 1
 1,747
 
 1,747
Exploration882
 1
 
 37
 3
 923
 
 923
882
 1
 
 40
 923
 
 923
Development1,122
 5
 10
 
 (144)
(b) 
993
 6
 999
1,122
 5
 10
 (144)
(b) 
993
 6
 999
Total$3,941
 $7
 $10
 $38
 $(141) $3,855
 $6
 $3,861
$3,941
 $7
 $10
 $(103) $3,855
 $6
 $3,861
December 31, 2016               
Property acquisition:               
Proved$276
 $
 $
 $
 $
 $276
 $
 $276
Unproved642
 
 
 1
 (11) 632
 
 632
Exploration525
 1
 
 10
 3
 539
 
 539
Development456
 55
 3
 
 121
(b) 
635
 31
 666
Total$1,899
 $56
 $3
 $11
 $113
 $2,082
 $31
 $2,113
December 31, 2015               
Property acquisition:               
Proved$4
 $
 $
 $
 $
 $4
 $
 $4
Unproved61
 
 
 1
 
 62
 
 62
Exploration959
 60
 1
 37
 50
 1,107
 1
 1,108
Development1,477
 150
 13
 
 31
 1,671
 
 1,671
Total$2,501
 $210
 $14
 $38
 $81
 $2,844
 $1
 $2,845
(a) 
Includes costs incurred whether capitalized or expensed. 
(b) 
Includes revisions to asset retirement costs primarily due to changes in U.K. estimated costs as well as timing of abandonment activities in the U.K.activities.



105



Supplementary Information on Oil and Gas Producing Activities (Unaudited)




Results of Operations for Oil and Gas Producing Activities
 U.S. E.G. Libya 
Other
Africa
 Other Int'l Cont Ops Disc Ops Total
Year Ended December 31, 2017               
Revenues and other income:               
Sales$3,050
 $45
 $431
 $
 $282
 $3,808
 $423
 $4,231
Transfers
 344
 
 
 
 344
 
 344
Other income(a)
74
 
 
 
 38
 112
 (43) 69
Total revenues and other income3,124
 389
 431
 
 320
 4,264
 380
 4,644
Expenses:          
    
Production costs(985) (84) (44) 
 (152) (1,265) (272) (1,537)
Exploration expenses(b)
(153) 
 
 (171) (83) (407) 
 (407)
Depreciation, depletion and        

 

    
amortization(c)
(2,105) (134) (21) 
 (273) (2,533) (6,676) (9,209)
Technical support and other(28) (4) (4) (7) (18) (61) 
 (61)
Total expenses(3,271) (222) (69) (178) (526) (4,266) (6,948) (11,214)
Results before income taxes(147) 167
 362
 (178) (206) (2) (6,568) (6,570)
Income tax provision(1) (50) (333) 
 13
 (371) 1,674
 1,303
Results of operations$(148) $117
 $29
 $(178) $(193) $(373) $(4,894) $(5,267)
Year Ended December 31, 2016          
    
Revenues and other income:          
    
Sales$2,249
 $42
 $54
 $
 $237
 $2,582
 $724
 $3,306
Transfers
 291
 
 
 
 291
 
 291
Other income(a)
387
 
 
 
 2
 389
 
 389
Total revenues and other income2,636
 333
 54
 
 239
 3,262
 724
 3,986
Expenses:          
   
Production costs(952) (81) (36) 
 (140) (1,209) (544) (1,753)
Exploration expenses(b)
(306) (1) (6) (8) (2) (323) (7) (330)
Depreciation, depletion and        

 

    
amortization(c)
(1,901) (114) (7) 
 (132) (2,154) (239) (2,393)
Technical support and other(21) (4) 
 (3) (2) (30) (1) (31)
Total expenses(3,180) (200) (49) (11) (276) (3,716) (791) (4,507)
Results before income taxes(544) 133
 5
 (11) (37) (454) (67) (521)
Income tax provision (d)
195
 (26) (2) 
 57
 224
 15
 239
Results of operations$(349) $107
 $3
 $(11) $20
 $(230) $(52) $(282)
Year Ended December 31, 2015          
    
Revenues and other income:          
    
Sales$3,374
 $40
 $
 $
 $329
 $3,743
 $700
 $4,443
Transfers
 296
 
 
 
 296
 
 296
Other income(a)
230
 
 
 (109) 1
 122
 
 122
Total revenues and other income3,604
 336
 
 (109) 330
 4,161
 700
 4,861
Expenses:          
   
Production costs(1,259) (84) (31) 
 (177) (1,551) (660) (2,211)
Exploration expenses(b)
(750) (41) 
 (36) (143) (970) (348) (1,318)
Depreciation, depletion and        

 

   

amortization(c)
(2,758) (92) (5) 
 (163) (3,018) (266) (3,284)
Technical support and other(47) (6) (1) (1) (3) (58) (2) (60)
Total expenses(4,814) (223) (37) (37) (486) (5,597) (1,276) (6,873)
Results before income taxes(1,210) 113
 (37) (146) (156) (1,436) (576) (2,012)
Income tax provision437
 (33) 37
 50
 86
 577
 31
 608
Results of operations$(773) $80
 $
 $(96) $(70) $(859) $(545) $(1,404)


Supplementary Information on Oil and Gas Producing Activities (Unaudited)


 U.S. E.G. Libya Other Int’l Cont Ops Disc Ops Total
Year Ended December 31, 2019             
Revenues and other income:             
Sales$4,472
 $307
 $
 $140
 $4,919
 $
 $4,919
Other income(a)
46
 
 
 3
 49
 
 49
Total revenues and other income4,518
 307
 
 143
 4,968
 
 4,968
Expenses:        
    
Production costs(1,384) (73) 
 (71) (1,528) 
 (1,528)
Exploration expenses(b)
(149) 
 
 
 (149) 
 (149)
Depreciation, depletion and amortization(c)
(2,274) (97) 
 (23) (2,394) 
 (2,394)
Technical support and other(38) (9) 
 (10) (57) 
 (57)
Total expenses(3,845) (179) 
 (104) (4,128) 
 (4,128)
Results before income taxes673
 128
 
 39
 840
 
 840
Income tax (provision) benefit(6) (32) 
 12
 (26) 
 (26)
Results of operations$667
 $96
 $
 $51
 $814
 $
 $814
Year Ended December 31, 2018        
    
Revenues and other income:        
    
Sales$4,842
 $383
 $196
 $402
 $5,823
 $
 $5,823
Other income(a)
81
 
 255
 104
 440
 
 440
Total revenues and other income4,923
 383
 451
 506
 6,263
 
 6,263
Expenses:        
   
Production costs(1,371) (68) (12) (180) (1,631) 
 (1,631)
Exploration expenses(b)
(245) (51) 
 7
 (289) 
 (289)
Depreciation, depletion and amortization(c)
(2,247) (117) (8) (102) (2,474) 
 (2,474)
Technical support and other(49) (5) 
 (6) (60) 
 (60)
Total expenses(3,912) (241) (20) (281) (4,454) 
 (4,454)
Results before income taxes1,011
 142
 431
 225
 1,809
 
 1,809
Income tax (provision) benefit19
 (38) (163) (124) (306) 
 (306)
Results of operations$1,030
 $104
 $268
 $101
 $1,503
 $
 $1,503
Year Ended December 31, 2017        
    
Revenues and other income:        
    
Sales$3,050
 $45
 $431
 $282
 $3,808
 $423
 $4,231
Transfers
 344
 
 
 344
 
 344
Other income(a)
74
 
 
 38
 112
 (43) 69
Total revenues and other income3,124
 389
 431
 320
 4,264
 380
 4,644
Expenses:        
   
Production costs(985) (84) (44) (152) (1,265) (272) (1,537)
Exploration expenses(b)
(153) 
 
 (254) (407) 
 (407)
Depreciation, depletion and amortization(c)
(2,105) (134) (21) (273) (2,533) (6,676) (9,209)
Technical support and other(28) (4) (4) (25) (61) 
 (61)
Total expenses(3,271) (222) (69) (704) (4,266) (6,948) (11,214)
Results before income taxes(147) 167
 362
 (384) (2) (6,568) (6,570)
Income tax (provision) benefit(1) (50) (333) 13
 (371) 1,674
 1,303
Results of operations$(148) $117
 $29
 $(371) $(373) $(4,894) $(5,267)
(a) 
Includes net gain (loss) on dispositions (see Note 5)5). In 2018 and 2017 this also includes revisions to asset retirement costs primarily due to changes in U.K. estimated costs as well as timing of abandonment activities in the U.K.activities.
(b) 
Includes exploratory dry well costs, unproved property impairments, and other (see Note 10).other.
(c) 
Includes long-lived asset impairments (see Note 10)11).
(d)    Discontinued operations activity includes $135 million of deferred tax expense related to Alberta provincial corporate tax rate increase.




106



Supplementary Information on Oil and Gas Producing Activities (Unaudited)


Results of Operations for Oil and Gas Producing Activities
The following reconciles results of operations for oil and gas producing activities to segment income:
Year Ended December 31,Year Ended December 31,
(In millions)2017 2016 20152019 2018 2017
Results of operations$(5,267) $(282) $(1,404)$814
 $1,503
 $(5,267)
Discontinued operations4,894
 52
 545

 
 4,894
Results of continuing operations(373) (230) (859)814
 1,503
 (373)
Items not included in results of oil and gas operations, net of tax:          
Marketing income and other non-oil and gas producing related activities(107) (39) (102)(141) (170) (107)
Income from equity method investments229
 142
 127
87
 214
 229
Items not allocated to segment income, net of tax:          
Loss (gain) on asset dispositions and other income(79) (248) (76)
Loss (gain) on asset dispositions and other
 (304) (79)
Long-lived asset impairments475
 148
 602
24
 103
 475
Unrealized loss (gain) on derivatives81
 72
 (32)124
 (265) 81
Deferred tax valuation allowance increase
 (32) 
Segment income$226
 $(187) $(340)$908
 $1,081
 $226


107




Supplementary Information on Oil and Gas Producing Activities (Unaudited)




Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Reserves
U.S. GAAP prescribes guidelines for computing the standardized measure of future net cash flows and changes therein relating to estimated proved reserves, giving very specific assumptions to be made such as the use of a 10% discount rate and an unweighted average of commodity prices in the prior 12-month period using the closing prices on the first day of each month as well as current costs applicable at the date of the estimate. These and other required assumptions have not always proved accurate in the past, and other valid assumptions would give rise to substantially different results. In addition, the 10% discount rate required to be used is not necessarily the most appropriate discount factor based on our cost of capital and the risks associated with our business and the oil and natural gas industry in general. This information is not the fair value nor does it represent the expected present value of future cash flows of our crude oil and condensate, natural gas liquid,liquids, and natural gas reserves.
(In millions)U.S. E.G. Libya Other Int'l TotalU.S. E.G. Libya Other Int’l Total
Year Ended December 31, 2019         
Future cash inflows$40,487
 $1,812
 $
 $
 $42,299
Future production and support costs(14,167) (838) 
 
 (15,005)
Future development costs(7,561) (18) 
 
 (7,579)
Future income tax expenses(1,085) (280) 
 
 (1,365)
Future net cash flows$17,674
 $676
 $
 $
 $18,350
10% annual discount for timing of cash flows(7,416) (179) 
 
 (7,595)
Standardized measure of discounted future net cash flows-
related to continuing operations
$10,258
 $497
 $
 $
 $10,755
Year Ended December 31, 2018         
Future cash inflows$49,054
 $2,218
 $
 $1,813
 $53,085
Future production and support costs(15,995) (878) 
 (876) (17,749)
Future development costs(7,729) (12) 
 (1,072) (8,813)
Future income tax expenses(1,967) (355) 
 275
 (2,047)
Future net cash flows$23,363
 $973
 $
 $140
(a) 
$24,476
10% annual discount for timing of cash flows(10,653) (254) 
 100
 (10,807)
Standardized measure of discounted future net cash flows-
related to continuing operations
$12,710
 $719
 $
 $240
 $13,669
Year Ended December 31, 2017                  
Future cash inflows$36,480
 $1,966
 $10,303
 $1,403
 $50,152
$36,480
 $1,966
 $10,303
 $1,403
 $50,152
Future production and support costs(14,796) (748) (931) (821) (17,296)(14,796) (748) (931) (821) (17,296)
Future development costs(6,987) (7) (501) (1,247) (8,742)(6,987) (7) (501) (1,247) (8,742)
Future income tax expenses(786) (274) (8,387) 496
 (8,951)(786) (274) (8,387) 496
 (8,951)
Future net cash flows$13,911
 $937
 $484
 $(169)
(a) 
$15,163
$13,911
 $937
 $484
 $(169)
(a) 
$15,163
10% annual discount for timing of cash flows(7,009) (235) (224) 168
 (7,300)(7,009) (235) (224) 168
 (7,300)
Standardized measure of discounted future net cash flows-
related to continuing operations
$6,902
 $702
 $260
 $(1) $7,863
$6,902
 $702
 $260
 $(1) $7,863
Standardized measure of discounted future net cash flows-
related to discontinued operations
      

 
Year Ended December 31, 2016         
Future cash inflows$27,610
 $1,977
 $8,511
 $921
 $39,019
Future production and support costs(12,758) (824) (930) (673) (15,185)
Future development costs(7,233) (13) (296) (1,345) (8,887)
Future income tax expenses
 (251) (6,884) 514
 (6,621)
Future net cash flows$7,619
 $889
 $401
 $(583)
(a) 
$8,326
10% annual discount for timing of cash flows(4,355) (264) (143) 313
 (4,449)
Standardized measure of discounted future net cash flows-
related to continuing operations
$3,264
 $625
 $258
 $(270) $3,877
Standardized measure of discounted future net cash flows-
related to discontinued operations
      

 $1,076
Year Ended December 31, 2015         
Future cash inflows$31,026
 $2,671
 $12,157
 $1,281
 $47,135
Future production and support costs(12,270) (1,095) (901) (902) (15,168)
Future development costs(6,637) (94) (689) (1,537) (8,957)
Future income tax expenses(778) (369) (9,857) 602
 (10,402)
Future net cash flows$11,341
 $1,113
 $710
 $(556)
(a) 
$12,608
10% annual discount for timing of cash flows(6,082) (380) (441) 352
 (6,551)
Standardized measure of discounted future net cash flows-
related to continuing operations
$5,259
 $733
 $269
 $(204) $6,057
Standardized measure of discounted future net cash flows-
related to discontinued operations
      

 $165
(a) 
Future cash flows for Other International reflects the impact of future abandonment costs related to the U.K.



108



Supplementary Information on Oil and Gas Producing Activities (Unaudited)




Changes in the Standardized Measure of Discounted Future Net Cash Flows
Year Ended December 31, Year Ended December 31,
(In millions)2017 2016 2015 2019 2018 2017
Sales and transfers of oil and gas produced, net of production and support costs$(2,853) $(1,634) $(2,422) $(3,345) $(4,135) $(2,853)
Net changes in prices and production and support costs related to future production4,916
 (3,621)
(b) 
(21,309)
(b) 
(3,569) 6,342
 4,916
Extensions, discoveries and improved recovery, less related costs661
 (2,174) 6
 718
 998
 661
Development costs incurred during the period1,027
 669
 1,693
 1,727
 1,240
 1,027
Changes in estimated future development costs183
 2,534
 7,247
 278
 (330) 183
Revisions of previous quantity estimates(a)
497
 654
 (5,682) 7
 (501) 497
Net changes in purchases and sales of minerals in place102
 (651) (460) (200) (3,035) 102
Accretion of discount698
 1,005
 2,719
 1,315
 1,175
 698
Net change in income taxes(1,245) 1,038
 9,989
 155
 4,052
 (1,245)
Net change for the year3,986
 (2,180) (8,219) (2,914) 5,806
 3,986
Beginning of the year related to continuing operations3,877
 6,057
 14,276
 
End of the year related to continuing operations$7,863
 $3,877
 $6,057
 
Net change for the year related to discontinued operations$
 $911
 $(2,115) 
Beginning of the year13,669
 7,863
 3,877
End of the year$10,755
 $13,669
 $7,863
(a) 
Includes amounts resulting from changes in the timing of production.
(b)
Decrease primarily due to lower realized prices.








109



Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
None.
Item 9A. Controls and Procedures
Disclosure Controls and Procedures
An evaluation of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934) was carried out under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer. As of the end of the period covered by this Report based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the design and operation of these disclosure controls and procedures were effective as of December 31, 2017.2019.
Management'sManagement’s Annual Report on Internal Control Over Financial Reporting
See "Management’s“Management’s Report on Internal Control over Financial Reporting"Reporting” under Item 8 of this Form 10-K.
Attestation Report of the Registered Public Accounting Firm
See "Report“Report of Independent Registered Public Accounting Firm"Firm” under Item 8 of this Form 10-K.
Changes in Internal Control Over Financial Reporting
During the fourth quarter of 2017,2019, there were no changes in our internal control over financial reporting that have materially affected, or were reasonably likely to materially affect, our internal control over financial reporting.
Item 9B. Other Information
None.

110



PART III
Item 10. Directors, Executive Officers and Corporate Governance
Information required by this item is incorporated by reference to "Proposal“Proposal 1: Election of Directors," "Corporate” “Corporate Governance—Committees of the Board"Board” and "Section“Section 16(a) Beneficial Ownership Reporting Compliance"Compliance” in our Proxy Statement for the 20182020 Annual Meeting of Stockholders, to be filed with the SEC within 120 days of December 31, 20172019 (the "2018“2020 Proxy Statement"Statement”).
See "Executive“Executive Officers of the Registrant"Registrant” under Item 1 of this Form 10-K for information about our executive officers.
Our Code of Ethics for Senior Financial Officers, which applies to the Company’s principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, is available on our website at www.marathonoil.com under Investors—Corporate Governance. You may request a printed copy free of charge by sending a request to the Corporate Secretary. We intend to disclose any amendments and any waivers to our Code of Ethics for Senior Financial Officers on our website at www.marathonoil.com under Investors —Corporate Governance within four business days. The waiver information will remain on the website for at least 12 months after the initial disclosure of such waiver.


Item 11. Executive Compensation
Information required by this item is incorporated by reference to "Corporate“Corporate Governance—Compensation Committee Interlocks and Insider Participation," "Compensation” “Compensation Committee Report," "Director” “Director Compensation," "Compensation” “Compensation Discussion and Analysis"Analysis” and "Executive Compensation"“Executive Compensation” in the 20182020 Proxy Statement.
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
Portions of information required by this item are incorporated by reference to "Security“Security Ownership of Certain Beneficial Owners and Management"Management” in the 20182020 Proxy Statement.
Securities Authorized for Issuance Under Equity Compensation Plans
The following table provides information as of December 31, 20172019 with respect to shares of Marathon Oil common stock that may be issued under our existing equity compensation plans:
Marathon Oil Corporation 2019 Incentive Compensation Plan (the “2019 Plan”)
Marathon Oil Corporation 2016 Incentive Compensation Plan (the "2016 Plan"“2016 Plan”)
Marathon Oil Corporation 2012 Incentive Compensation Plan (the "2012 Plan"“2012 Plan”) – No additional awards will be granted under this plan.
Marathon Oil Corporation 2007 Incentive Compensation Plan (the "2007 Plan"“2007 Plan”) – No additional awards will be granted under this plan.
Marathon Oil Corporation 2003 Incentive Compensation Plan (the "2003 Plan") – No additional awards will be granted under this plan.
Deferred Compensation Plan for Non-Employee Directors – No additional awards will be granted under this plan.

Plan category
Number of securities to be issued upon
exercise of outstanding options, warrants and rights
 
Weighted-average
exercise price of
outstanding options,
warrants and rights(c)
 
Number of securities
remaining available for future issuance
under equity compensation plans
 Number of securities to be issued upon exercise of outstanding options, warrants and rights 
Weighted-average exercise price of outstanding options, warrants and rights(b)
 Number of securities remaining available for future issuance under equity compensation plans 
Equity compensation plans approved by stockholders11,915,472
(a) 
$25.52 43,840,884
(d) 
6,546,401
(a) 
$23.55
 30,911,537
(c)  
Equity compensation plans not approved by stockholders12,291
(b) 
N/A 
  
Total11,927,763
  N/A 43,840,884
  
(a) 
Includes the following:
736,199No stock options outstanding under the 2019 Plan; 2,044,463 stock options outstanding under the 2016 Plan; 3,991,9052,494,866 stock options outstanding under the 2012 Plan; 5,591,708989,835 stock options outstanding under the 2007 Plan;
399,114181,982 common stock units that have been credited to non-employee directors pursuant to the non-employee director deferred compensation program and the annual director stock award program established under the 2019 Plan, 2016 Plan, 2012 Plan 2007 Plan and 20032007 Plan. Common stock units credited under the 2019 Plan, 2016 Plan, 2012 Plan and 2007 Plan were nil 153,119, nil, and 2003 Plan were 69,556, 142,724, 152,839 and 33,995,28,863, respectively;

1,196,546 restricted stock units granted to non-officers under the 2012 Plan and 2016 Plan and outstanding as of December 31, 2017.
12,263 and 647,889 outstanding restricted stock units granted to non-officers under the 2019 Plan and 2016 Plan as of December 31, 2019, respectively. Additionally, 175,103 outstanding restricted stock units granted to officers under the 2016 Plan;
In addition to the awards reported above, 2,850,7986,060,945 and 3,525,501276,719 shares of restricted stock were issued and outstanding as of December 31, 2017,2019, but subject to forfeiture restrictions under the 20122016 Plan and 2016 Plans,2019 Plan, respectively.
(b) 
Reflects awards of common stock units made to non-employee directors under the Deferred Compensation Plan for Non-Employee Directors prior to April 30, 2003. When a non-employee director leaves the Board, he or she will be issued actual shares of Marathon Oil common stock in place of the common stock units.
(c)
The weighted-average exercise prices do not take the restricted stock units or common stock units into account as these awards have no exercise price.
(d)(c) 
Reflects the shares available for issuance under the 20162019 Plan. No more than 18,496,71430,775,974 of these shares may be issued for awards other than stock options or stock appreciation rights. In addition, shares related to grants that are forfeited, terminated, canceled or expire unexercised shall again immediately become available for issuance.
The Deferred Compensation Plan for Non-Employee Directors is our only equity compensation plan that has not been approved by our stockholders. Our authority to make equity grants under this plan was terminated effective April 30, 2003. Under the Deferred Compensation Plan for Non-Employee Directors, all non-employee directors were required to defer half of their annual retainers in the form of common stock units. On the date the retainer would have otherwise been payable to the non-employee director, we credited an unfunded bookkeeping account for each non-employee director with a number of common stock units equal to half of his or her annual retainer divided by the fair market value of our common stock on that date. The ongoing value of each common stock unit equals the market price of a share of our common stock. When the non-employee director leaves the Board, he or she is issued actual shares of our common stock equal to the number of common stock units in his or her account at that time.

111


Item 13. Certain Relationships and Related Transactions, and Director Independence
Information required by this item is incorporated by reference to "Transactions“Transactions with Related Persons," and "Proposal“Proposal 1: Election of Directors—Director Independence"Independence” in the 20182020 Proxy Statement.
Item 14. Principal Accountant Fees and Services
Information required by this item is incorporated by reference to "Proposal“Proposal 2: Ratification of Independent Auditor for 2018"2020“ in the 20182020 Proxy Statement.

112



PART IV
Item 15. Exhibits, Financial Statement Schedules
A. Documents Filed as Part of the Report
1. Financial Statements – See Part II, Item 8. of this Annual Report on Form 10-K.
2. Financial Statement Schedules – The audited financial statements and related footnotes of Alba Plant LLC, our equity method investment, are being filed within Exhibit 99.9 in accordance with Rule 3-09 of Regulation S-X. All other financial statement schedules required under SEC rules but not included in this Annual Report on Form 10-K are omitted because they are not applicable or the required information is contained in the consolidated financial statements or notes thereto.
3. Exhibits – The information required by this Item 15 is incorporated by reference to the Exhibit Index accompanying this Annual Report on Form 10-K.
Item 16. Form 10-K Summary
None.



113



SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
February 22, 201820, 2020 MARATHON OIL CORPORATION
   
  By: /s/ GARY E. WILSON
  Gary E. Wilson
  Vice President, Controller and Chief Accounting Officer


POWER OF ATTORNEY
Each person whose signature appears below appoints Lee M. Tillman, Dane E. Whitehead, and Gary E. Wilson, and each of them, as his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, with full power and authority to each of said attorneys-in-fact and agents to do and perform each and every act whatsoever that is necessary, appropriate or advisable in connection with any or all of the above-described matters and to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them or their substitutes, may lawfully do or cause to be done by virtue hereof.
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on February 22, 201820, 2020 on behalf of the registrant and in the capacities indicated.
Signature Title
   
/S/s/ LEE M. TILLMAN
 Chairman, President and Chief Executive Officer and Director
Lee M. Tillman  
   
/S/ Danes/ DANE E. Whitehead
WHITEHEAD
 Executive Vice President and Chief Financial Officer
Dane E. Whitehead  
   
/s/ GARY E. WILSON Vice President, Controller and Chief Accounting Officer
Gary E. Wilson  
   
/S/ DENNIS H. REILLEY
Chairman of the Board
Dennis H. Reilley
/s/ GAURDIE E. BANISTER, JR.Director
Gaurdie E. Banister, Jr.
/S/ GREGORY H. BOYCE
 Director
Gregory H. Boyce  
   
/S/s/ CHADWICK C. DEATON Director
Chadwick C. Deaton  
   
/S/s/ MARCELA E. DONADIO
 Director
Marcela E. Donadio  
   
/S/ PHILIP LADER
s/ JASON B. FEW
 Director
Philip LaderJason B. Few  
   
/S/ MICHAEL E. J. PHELPS
s/ DOUGLAS L. FOSHEE
 Director
Michael E. Douglas L. Foshee
/s/ M.ELISE HYLANDDirector
M. Elise Hyland
/s/ J.KENT WELLSDirector
J. PhelpsKent Wells  

114



Exhibit Index
Exhibit   Incorporated by Reference (File No. 001-05153, unless otherwise indicated)
Number Exhibit Description Form Exhibit Filing Date
1 Underwriting Agreement      
1.1*       
2 Plan of Acquisition, Reorganization, Arrangement, Liquidation or Succession      
2.1  10-Q 10.1 5/5/2017
3 Articles of Incorporation and By-laws
3.1  10-Q 3.1 8/8/2013
3.2  8-K 3.1 3/1/2016
3.3  10-K 3.3 2/28/2014
4 Instruments Defining the Rights of Security Holders, Including Indentures
4.1  10-K 4.2 2/28/2014
10 Material Contracts      
10.1  8-K 4.1 6/2/2014
10.2  10-Q 10.1 5/7/2015
10.3  8-K 99.1 3/8/2016
Exhibit Number   Incorporated by Reference (File No. 001-05153, unless otherwise indicated)
 Exhibit Description Form Exhibit Filing Date
1 Underwriting Agreement      
1.1  10-K 1.1 2/22/2018
2 Plan of Acquisition, Reorganization, Arrangement, Liquidation or Succession      
2.1  10-Q 10.1 5/5/2017
3 Articles of Incorporation and By-laws
3.1  8-K 3.1 6/1/2018
3.2  10-Q 3.2 8/4/2016
3.3  10-K 3.3 2/28/2014
4 Instruments Defining the Rights of Security Holders, Including Indentures
4.1  10-K 4.2 2/28/2014
4.2*       
10 Material Contracts      
10.1  8-K 4.1 6/2/2014
10.2  10-Q 10.1 5/7/2015
10.3  8-K 99.1 3/8/2016

Exhibit   Incorporated by Reference (File No. 001-05153, unless otherwise indicated)
Number Exhibit Description Form Exhibit Filing Date
10.4  8-K 99.1 6/23/2017
10.5  10-Q 10.2 8/3/2017
10.6
  DEF 14A App. A 4/7/2016
10.7†  8-K/A 10.1 10/6/2016
10.8†  10-K 10.6 2/24/2017
10.9†  10-K 10.7 2/24/2017
10.10†  10-K 10.8 2/24/2017
10.11†

  10-K 10.9 2/24/2017
10.12*       
10.13*       
10.14
  DEF 14A App. III 3/8/2012
10.15
  8-K 10.1 8/1/2014
10.16†  10-Q 10.1 5/7/2014
10.17
  10-Q 10.2 5/7/2014
10.18†  10-Q 10.1 11/6/2013
Exhibit Number   Incorporated by Reference (File No. 001-05153, unless otherwise indicated)
 Exhibit Description Form Exhibit Filing Date
10.4  8-K 99.1 6/23/2017
10.5  10-Q 10.2 8/3/2017
10.6  8-K 99.1 10/22/2018
10.7 

 8-K 10.1 9/24/2019
10.8†  DEF 14A App. A 4/12/2019
10.9†  10-Q 10.1 8/8/2019
10.10†  10-Q 10.2 8/8/2019
10.11†  10-Q 10.3 8/8/2019
10.12
  10-Q 10.4 8/8/2019

Exhibit   Incorporated by Reference (File No. 001-05153, unless otherwise indicated)
Number Exhibit Description Form Exhibit Filing Date
10.19†  10-K 10.5 2/22/2013
10.20†  10-K 10.6 2/22/2013
10.21†  10-K 10.7 2/22/2013
10.22†  10-K 10.8 2/22/2013
10.23
  10-K 10.9 2/22/2013
10.24
  10-K 10.10 2/22/2013
10.25
  10-K 10.5 2/29/2012
10.26†  10-K 10.6 2/29/2012
10.27
  10-K 10.5 2/28/2011
10.28†  10-K 10.26 2/26/2010
10.29†  10-K 10.9 2/26/2010
10.30†  10-K 10.29 2/24/2017
10.31†  10-K 10.32 2/29/2012
10.32†  10-K 10.31 2/29/2012
10.33†*       
10.34
  10-K 10.10 2/28/2011
10.35
  10-K 10.32 2/27/2009
10.36  8-K 10.1 5/26/2011
12.1*       
21.1*       
23.1*       
23.2*       
23.3*       
Exhibit NumberIncorporated by Reference (File No. 001-05153, unless otherwise indicated)
Exhibit DescriptionFormExhibitFiling Date
10.13†*

10.14
DEF 14AApp. A4/7/2016
10.15†10-Q10.15/2/2019
10.16†10-Q10.25/2/2019
10.17†10-Q10.35/2/2019
10.18
10-Q10.45/2/2019
10.19†10-Q10.55/2/2019
10.20†8-K/A10.110/6/2016
10.21†10-K10.62/24/2017
10.22†10-K10.72/24/2017
10.23†10-K10.82/24/2017
10.24†

10-K10.92/24/2017
10.25†

10-K10.122/22/2018
10.26†

10-K10.132/22/2018
10.27
DEF 14AApp. III3/8/2012
10.28
8-K10.18/1/2014
10.29†10-Q10.15/7/2014
10.30
10-Q10.25/7/2014
10.31†10-Q10.111/6/2013
10.32†10-K10.52/22/2013

Exhibit   Incorporated by Reference (File No. 001-05153, unless otherwise indicated)
Number Exhibit Description Form Exhibit Filing Date
23.4*       
23.5*       
31.1*       
31.2*       
32.1*       
32.2*       
99.1  10-K 99.1 2/25/2016
99.2*       
99.3*       
99.4*       
99.5  10-K 99.3 2/24/2017
99.6  10-K 99.4 2/24/2017
99.7*       
99.8  10-K 99.6 2/24/2017
99.9*       
101.INS* XBRL Instance Document      
101.SCH* XBRL Taxonomy Extension Schema      
101.CAL* XBRL Taxonomy Extension Calculation Linkbase      
101.PRE* XBRL Taxonomy Extension Presentation Linkbase      
101.LAB* XBRL Taxonomy Extension Label Linkbase      
101.DEF* XBRL Taxonomy Extension Definition Linkbase      
* Filed herewith.
 Management contract or compensatory plan or arrangement.
Exhibit Number   Incorporated by Reference (File No. 001-05153, unless otherwise indicated)
 Exhibit Description Form Exhibit Filing Date
10.33†  10-K 10.6 2/22/2013
10.34
  10-K 10.5 2/29/2012
10.35†  10-K 10.6 2/29/2012
10.36
  10-K 10.5 2/28/2011
10.37†  10-K 10.29 2/24/2017
10.38†  10-K 10.32 2/29/2012
10.39†  10-K 10.31 2/29/2012
10.40† 

 10-Q 10.1 11/7/2019
10.41
  10-K 10.10 2/28/2011
10.42
  10-K 10.32 2/27/2009
10.43  8-K 10.1 5/26/2011
21.1*       
23.1*       
23.2*       
23.3*       
23.4*       
31.1*       
31.2*       
32.1*       
32.2*       
99.1*       
99.2*       
99.3  10-K 99.2 2/21/2019

4
Exhibit Number   Incorporated by Reference (File No. 001-05153, unless otherwise indicated)
 Exhibit Description Form Exhibit Filing Date
99.4  10-K 99.7 2/22/2018
99.9*       
101.INS* XBRL Instance Document - the XBRL Instance Document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document      
101.SCH* XBRL Taxonomy Extension Schema      
101.CAL* XBRL Taxonomy Extension Calculation Linkbase      
101.DEF* XBRL Taxonomy Extension Definition Linkbase      
101.LAB* XBRL Taxonomy Extension Label Linkbase      
101.PRE* XBRL Taxonomy Extension Presentation Linkbase      
104* 
Cover Page Interactive Data File, formatted in iXBRL and contained in Exhibit 101
      
* Filed herewith.
 Management contract or compensatory plan or arrangement.

5