Document and Entity Information
Document and Entity Information - shares | 6 Months Ended | |
Jun. 30, 2019 | Aug. 01, 2019 | |
Entity Information [Line Items] | ||
Document Type | 10-Q | |
Document Quarterly Report | true | |
Document Period End Date | Jun. 30, 2019 | |
Entity File Number | 1-7584 | |
Document Transition Report | false | |
Entity Registrant Name | TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC | |
Entity Incorporation, State or Country Code | DE | |
Entity Tax Identification Number | 74-1079400 | |
Entity Address, Address Line One | 2800 POST OAK BOULEVARD | |
Entity Address, City or Town | HOUSTON | |
Entity Address, State or Province | TX | |
Entity Address, Postal Zip Code | 77056 | |
City Area Code | 713 | |
Local Phone Number | 215-2000 | |
Entity Current Reporting Status | Yes | |
Entity Interactive Data Current | Yes | |
Entity Filer Category | Non-accelerated Filer | |
Entity Small Business | false | |
Entity Emerging Growth Company | false | |
Entity Shell Company | false | |
Entity Central Index Key | 0000099250 | |
Amendment Flag | false | |
Document Fiscal Year Focus | 2019 | |
Document Fiscal Period Focus | Q2 | |
Current Fiscal Year End Date | --12-31 | |
Entity Common Stock, Shares Outstanding | 0 |
Condensed Consolidated Statemen
Condensed Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | ||
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | |
Revenues [Abstract] | ||||
Natural gas sales | $ 22,429 | $ 29,873 | $ 46,515 | $ 55,124 |
Natural gas transportation | 526,152 | 415,708 | 1,060,312 | 842,286 |
Natural gas storage | 38,472 | 33,786 | 74,557 | 68,553 |
Other | 2,759 | 2,308 | 5,521 | 4,948 |
Total operating revenues | 589,812 | 481,675 | 1,186,905 | 970,911 |
Operating Costs and Expenses: | ||||
Cost of natural gas sales | 22,429 | 29,873 | 46,515 | 55,124 |
Cost of natural gas transportation | 8,939 | 8,461 | 23,574 | 21,535 |
Operation and maintenance | 98,135 | 93,659 | 181,583 | 180,675 |
Administrative and general | 57,358 | 46,981 | 105,509 | 93,362 |
Depreciation and amortization | 103,184 | 89,282 | 207,807 | 172,506 |
Taxes - other than income taxes | 18,661 | 17,164 | 38,938 | 35,602 |
Regulatory credit resulting from Tax Reform | (5,248) | (20,867) | (6,997) | (20,867) |
Other expense, net | 12,365 | 12,564 | 25,714 | 30,405 |
Total operating costs and expenses | 315,823 | 277,117 | 622,643 | 568,342 |
Operating Income | 273,989 | 204,558 | 564,262 | 402,569 |
Other (Income) and Other Expenses: | ||||
Interest expense | 70,989 | 53,375 | 142,080 | 98,449 |
Allowance for equity and borrowed funds used during construction (AFUDC) | (7,504) | (34,895) | (16,218) | (61,503) |
Equity in (earnings) losses of unconsolidated affiliates | (823) | (1,325) | (1,594) | 265 |
Miscellaneous other (income) expenses, net | (572) | (4,819) | (1,607) | (6,780) |
Total other (income) and other expenses | 62,090 | 12,336 | 122,661 | 30,431 |
Net Income | 211,899 | 192,222 | 441,601 | 372,138 |
Other comprehensive income (loss): | ||||
Equity interest in unrealized gain (loss) on interest rate hedges (includes $(51) and $(33) for the three months ended and $(129) and $(27) for the six months ended June 30, 2019 and June 30, 2018, respectively, of accumulated other comprehensive income reclassification for equity interest in realized gains on interest rate hedges) | (369) | 119 | (599) | 524 |
Comprehensive Income | $ 211,530 | $ 192,341 | $ 441,002 | $ 372,662 |
Condensed Consolidated Statem_2
Condensed Consolidated Statement of Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | ||
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | |
Accumulated other comprehensive income reclassification for equity interest in realized gains on interest rate hedges | $ (51) | $ (33) | $ (129) | $ (27) |
Condensed Consolidated Balance
Condensed Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018 |
Current Assets: | ||
Cash | $ 0 | $ 0 |
Receivables: | ||
Affiliates | 1,617 | 1,018 |
Advances to affiliate | 0 | 33,034 |
Trade and other | 223,761 | 201,198 |
Transportation and exchange gas receivables | 10,361 | 4,515 |
Inventories | 74,643 | 63,205 |
Regulatory assets | 93,725 | 95,770 |
Other | 11,868 | 12,574 |
Total current assets | 415,975 | 411,314 |
Investments, at cost plus equity in undistributed earnings | 37,268 | 26,520 |
Property, Plant and Equipment: | ||
Natural gas transmission plant | 16,329,890 | 15,908,878 |
Less-Accumulated depreciation and amortization | 4,321,042 | 4,147,729 |
Total property, plant and equipment, net | 12,008,848 | 11,761,149 |
Other Assets: | ||
Regulatory assets | 273,545 | 289,479 |
Right-of-use assets | 91,516 | 0 |
Other | 192,414 | 167,490 |
Total other assets | 557,475 | 456,969 |
Total Assets | 13,019,566 | 12,655,952 |
Payables: | ||
Affiliates | 56,330 | 50,727 |
Advances from affiliates | 34,345 | 0 |
Trade and other | 253,413 | 226,911 |
Transportation and exchange gas payables | 1,224 | 5,973 |
Reserve for rate refund | 85,853 | 0 |
Regulatory liabilities | 39,652 | 5,097 |
Accrued liabilities | 218,733 | 218,384 |
Long-term debt due within one year | 16,904 | 15,419 |
Total current liabilities | 706,454 | 522,511 |
Long-Term Debt | 4,010,847 | 3,998,988 |
Other Long-Term Liabilities: | ||
Asset retirement obligations | 364,841 | 348,609 |
Regulatory liabilities | 996,813 | 1,026,892 |
Deferred revenue | 220,885 | 226,164 |
Lease liability | 87,410 | 0 |
Other | 8,714 | 4,188 |
Total other long-term liabilities | 1,678,663 | 1,605,853 |
Contingent Liabilities and Commitments (Note 4) | ||
Members' Equity | ||
Member's capital | 4,428,499 | 4,428,499 |
Retained earnings | 2,195,168 | 2,099,567 |
Accumulated other comprehensive income | (65) | 534 |
Total member's equity | 6,623,602 | 6,528,600 |
Total liabilities and member's equity | $ 13,019,566 | $ 12,655,952 |
Condensed Consolidated Statem_3
Condensed Consolidated Statement of Member's Equity (Unaudited) - USD ($) $ in Thousands | Total | Member Units [Member] | Retained Earnings [Member] | AOCI Attributable to Parent [Member] |
Balance at beginning of period at Dec. 31, 2017 | $ 4,088,499 | $ 1,848,488 | $ 337 | |
Cash contributions from parent | $ 340,000 | 340,000 | ||
Net Income | 372,138 | 372,138 | ||
Cash distributions to parent | (190,000) | (190,000) | ||
Equity interest in unrealized gain (loss) on interest rate hedge | 524 | 524 | ||
Balance at end of period at Jun. 30, 2018 | 6,459,986 | 4,428,499 | 2,030,626 | 861 |
Balance at beginning of period at Mar. 31, 2018 | 4,428,499 | 1,973,404 | 742 | |
Cash contributions from parent | 0 | |||
Net Income | 192,222 | 192,222 | ||
Cash distributions to parent | (135,000) | |||
Equity interest in unrealized gain (loss) on interest rate hedge | 119 | 119 | ||
Balance at end of period at Jun. 30, 2018 | 6,459,986 | 4,428,499 | 2,030,626 | 861 |
Balance at beginning of period at Dec. 31, 2018 | 6,528,600 | 4,428,499 | 2,099,567 | 534 |
Cash contributions from parent | 0 | 0 | ||
Net Income | 441,601 | 441,601 | ||
Cash distributions to parent | (346,000) | (346,000) | ||
Equity interest in unrealized gain (loss) on interest rate hedge | (599) | (599) | ||
Balance at end of period at Jun. 30, 2019 | 6,623,602 | 4,428,499 | 2,195,168 | (65) |
Balance at beginning of period at Mar. 31, 2019 | 4,428,499 | 2,153,269 | 304 | |
Cash contributions from parent | 0 | |||
Net Income | 211,899 | 211,899 | ||
Cash distributions to parent | (170,000) | |||
Equity interest in unrealized gain (loss) on interest rate hedge | (369) | (369) | ||
Balance at end of period at Jun. 30, 2019 | $ 6,623,602 | $ 4,428,499 | $ 2,195,168 | $ (65) |
Condensed Consolidated Statem_4
Condensed Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands | 6 Months Ended | |
Jun. 30, 2019 | Jun. 30, 2018 | |
Cash flows from operating activities: | ||
Net Income | $ 441,601 | $ 372,138 |
Adjustments to reconcile net income to net cash provided by (used in) operating activities: | ||
Depreciation and amortization | 207,807 | 172,506 |
Allowance for equity funds used during construction (equity AFUDC) | (13,598) | (45,910) |
Regulatory credit resulting from Tax Reform | (6,997) | (20,867) |
Equity in (earnings) losses of unconsolidated affiliates | (1,594) | 265 |
Distribution from unconsolidated affiliates | 2,496 | 931 |
Changes in operating assets and liabilities: | ||
Receivables - affiliates | (599) | 300 |
Receivables - trade and other | (22,563) | 5,053 |
Transportation and exchange gas receivable | (5,846) | (4,932) |
Inventories | (3,671) | (19,794) |
Payables - affiliates | 5,603 | (10,686) |
Payables - trade | (20,397) | (30,052) |
Accrued liabilities | (8,346) | 20,741 |
Reserve for rate refunds | 85,853 | 0 |
Asset retirement obligations - non-current | 16,897 | 19,217 |
Deferred revenue | (5,279) | (5,279) |
Other, net | 37,518 | (17,244) |
Net cash provided by operating activities | 708,885 | 436,387 |
Cash flows from financing activities: | ||
Proceeds from long-term debt | 0 | 993,440 |
Proceeds from other financing obligations | 20,429 | 24,298 |
Retirement of long-term debt | 0 | 250,000 |
Payments on other financing obligations | (7,944) | (758) |
Payments for debt issuance costs | 0 | (9,208) |
Cash distributions to parent | (346,000) | (190,000) |
Cash contributions from parent | 0 | 340,000 |
Advances from affiliate, net | 34,345 | 0 |
Net cash provided by (used in) financing activities | (299,170) | 907,772 |
Cash flows from investing activities: | ||
Capital Expenditures | (412,561) | (1,463,600) |
Contributions and advances for construction costs | 17,481 | 337,874 |
Disposal of property, plant and equipment, net | (17,077) | (7,477) |
Cash contributions from parent | 33,034 | (193,886) |
Contribution to unconsolidated affiliate | (12,250) | 0 |
Purchase of ARO Trust investments | (42,632) | (36,807) |
Proceeds from sale of ARO Trust investments | 26,636 | 19,737 |
Other, net | (2,346) | 0 |
Net cash used in investing activities | (409,715) | (1,344,159) |
Increase (decrease) in cash | 0 | 0 |
Cash at beginning of period | 0 | 0 |
Cash at end of period | 0 | 0 |
Increase to property, plant and equipment, exclusive of equity AFUDC | (446,594) | (1,434,519) |
Changes in related accounts payable and accrued liabilities | 34,033 | (29,081) |
Capital Expenditures | $ (412,561) | $ (1,463,600) |
Basis of Presentation (Notes)
Basis of Presentation (Notes) | 6 Months Ended |
Jun. 30, 2019 | |
Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
Basis of Presentation | BASIS OF PRESENTATION In this report, Transco (which includes Transcontinental Gas Pipe Line Company, LLC and, unless the context otherwise requires, all of our majority-owned subsidiaries) is at times referred to in the first person as “we,” “us” or “our.” Transco is indirectly owned by The Williams Companies, Inc. (Williams). General The condensed consolidated unaudited financial statements include our accounts and the accounts of the subsidiaries we control. Companies in which we and our subsidiaries own 20 percent to 50 percent of the voting common stock or otherwise exercise significant influence over operating and financial policies of the company are accounted for under the equity method. The equity method investments as of June 30, 2019 and December 31, 2018 consist of Cardinal Pipeline Company, LLC (Cardinal) with an ownership interest of approximately 45 percent and Pine Needle LNG Company, LLC (Pine Needle) with an ownership interest of 35 percent . We received distributions associated with our equity method investments totaling $2.5 million and $0.9 million in the six months ended June 30, 2019 and June 30, 2018, respectively. We made a $ 12.3 million contribution to Pine Needle in the six months ended June 30, 2019. The condensed consolidated unaudited financial statements have been prepared from our books and records. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP) have been condensed or omitted in this Form 10-Q pursuant to Securities and Exchange Commission rules and regulations. The condensed consolidated unaudited financial statements include all normal recurring adjustments and others which, in the opinion of our management, are necessary to present fairly our interim financial statements. These condensed consolidated unaudited financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in our 2018 Annual Report on Form 10-K. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated unaudited financial statements and accompanying notes. Actual results could differ from those estimates. A reclassification within operating activities in the Condensed Consolidated Statement of Cash Flows between Accrued liabilities and Other, net of $5.0 million for the six months ended June 30, 2018, has been made to conform to the 2019 presentation. Income Taxes We generally are not a taxable entity for federal or state and local income tax purposes. The tax on net income is generally borne by our parent, Williams. Net income for financial statement purposes may differ significantly from taxable income of Williams as a result of differences between the tax basis and financial reporting basis of assets and liabilities. Revenue Subject to Refund Federal Energy Regulatory Commission (FERC) regulations promulgate policies and procedures which govern a process to establish the rates that we are permitted to charge customers for natural gas sales and services, including the transportation and storage of natural gas. Key determinants in the ratemaking process are (1) costs of providing service, including depreciation expense, (2) allowed rate of return, including the equity component of the capital structure and related taxes, and (3) volume throughput assumptions. As a result of the ratemaking process, certain revenues collected by us may be subject to refund upon the issuance of final orders by the FERC in pending rate proceedings. We record estimates of rate refund liabilities considering our and other third-party regulatory proceedings, advice of counsel and estimated total exposure, as well as collection and other risks. Depending on the results of these proceedings, the actual amounts allowed to be collected from customers could differ from management's estimate. In addition, as a result of rate orders, tariff provisions or regulations, we are required to refund or credit certain revenues to our customers. At June 30, 2019, we have accrued approximately $85.9 million related to Docket No. RP18-1126, which we believe is adequate for any refunds that may be required. Accounting Standards Issued and Adopted In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-02 “Leases (Topic 842)” (ASU 2016-02). ASU 2016-02 establishes a comprehensive new lease accounting model. ASU 2016-02 modifies the definition of a lease, requires a dual approach to lease classification similar to prior lease accounting, and causes lessees to recognize operating leases on the balance sheet as a lease liability measured as the present value of the future lease payments with a corresponding right-of-use asset, with an exception for leases with a term of one year or less. Additional disclosures are required regarding the amount, timing, and uncertainty of cash flows arising from leases. In January 2018, the FASB issued ASU 2018-01 “Leases (Topic 842): Land Easement Practical Expedient for Transition to Topic 842” (ASU 2018-01). Per ASU 2018-01, land easements and rights-of-way are required to be assessed under ASU 2016-02 to determine whether the arrangements are or contain a lease. ASU 2018-01 permits an entity to elect a transition practical expedient to not apply ASU 2016-02 to land easements that exist or expired before the effective date of ASU 2016-02 and that were not previously assessed under the previous lease guidance in Accounting Standards Codification (ASC) Topic 840 “Leases.” In July 2018, the FASB issued ASU 2018-11 “Leases (Topic 842): Targeted Improvements” (ASU 2018-11). Prior to ASU 2018-11, a modified retrospective transition was required for financing or operating leases existing at or entered into after the beginning of the earliest comparative period presented in the financial statements. ASU 2018-11 allows entities an additional transition method to the existing requirements whereby an entity could adopt the provisions of ASU 2016-02 by recognizing a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption without adjustment to the financial statements for periods prior to adoption. ASU 2018-11 also allows a practical expedient that permits lessors to not separate non-lease components from the associated lease component if certain conditions are present. ASU 2016-02 is effective for interim and annual periods beginning after December 15, 2018. We prospectively adopted ASU 2016-02 effective January 1, 2019, and did not adjust prior periods as permitted by ASU 2018-11 (See Note 3). We completed our review of contracts to identify leases based on the modified definition of a lease and implemented changes to our internal controls to support management in the accounting for and disclosure of leasing activities upon adoption of ASU 2016-02. We implemented a financial lease accounting system to assist management in the accounting for leases upon adoption. The most significant changes to our financial statements as a result of adopting ASU 2016-02 relate to the recognition of a $91.3 million lease liability and offsetting right-of-use asset in our Condensed Consolidated Balance Sheet for operating leases. We also evaluated ASU 2016-02’s available practical expedients on adoption. We generally elected to adopt the practical expedients, which includes the practical expedient to not separate lease and non-lease components by both lessees and lessors by class of underlying assets and the land easements practical expedient. Accounting Standards Issued But Not Yet Adopted In June 2016, the FASB issued ASU 2016-13 “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (ASU 2016-13). ASU 2016-13 changes the impairment model for most financial assets and certain other instruments. For trade and other receivables, held-to-maturity debt securities, loans, and other instruments, entities will be required to use a new forward-looking “expected loss” model that generally will result in the earlier recognition of allowances for losses. The guidance also requires increased disclosures. ASU 2016-13 is effective for interim and annual periods beginning after December 15, 2019. We plan to adopt as of January 1, 2020. We anticipate that ASU 2016-13 will primarily apply to our trade receivables. While we do not expect a significant financial impact, we are currently developing additional processes, procedures and internal controls in order to make the necessary credit loss assessments and required disclosures. |
Revenue Recognition (Notes)
Revenue Recognition (Notes) | 6 Months Ended |
Jun. 30, 2019 | |
Revenue Recognition [Abstract] | |
Revenue from Contract with Customer [Text Block] | 2. REVENUE RECOGNITION Revenue by Category Our revenue disaggregation by major service line includes Natural gas sales , Natural gas transportation , Natural gas storage , and Other , which are separately presented on the Condensed Consolidated Statement of Comprehensive Income. Contract Liabilities The following table presents a reconciliation of our contract liabilities: Quarter to Date June 30, 2019 Year to Date June 30, 2019 (Thousands) Balance at beginning of period $ 234,092 $ 236,730 Payments received and deferred — — Recognized in revenue (2,641 ) (5,279 ) Balance at end of period $ 231,451 $ 231,451 The following table presents the amount of the contract liabilities balance as of June 30, 2019, expected to be recognized as revenue in each of the next five years as performance obligations are expected to be satisfied: (Thousands) 2019 (remainder) $ 5,287 2020 10,568 2021 10,566 2022 10,566 2023 10,566 Thereafter 183,898 Total $ 231,451 Remaining Performance Obligations The following table presents the transaction price allocated to the remaining performance obligations under certain contracts as of June 30, 2019. These primarily include reservation charges on contracted capacity on our firm transportation and storage contracts with customers. Amounts from certain contracts included in the table below, which are subject to the periodic review and approval by the FERC, reflect the rates for such services in our current FERC tariffs, net of estimated reserve for refund, for the life of the related contracts; however, these rates may change based on future tariffs approved by the FERC and the amount and timing of these changes is not currently known. This table excludes the variable consideration component for commodity charges. It also excludes consideration that will be recognized in future periods (see above for Contract Liabilities and the expected recognition of those amounts within revenue). Certain of our contracts contain evergreen provisions for periods beyond the initial term of the contract. The remaining performance obligations as of June 30, 2019, do not consider potential future performance obligations for which the renewal has not been exercised. The table below also does not include contracts with customers for which the underlying facilities have not received FERC authorization to be placed into service. (Thousands) 2019 (remainder) $ 1,110,171 2020 2,115,390 2021 1,994,257 2022 1,766,701 2023 1,447,332 Thereafter 13,545,469 Total $ 21,979,320 Accounts Receivable Receivables from contracts with customers are included within Receivables - Trade and other and Receivables - Affiliates and receivables that are not related to contracts with customers are included with Receivables - Advances to affiliate in our Condensed Consolidated Balance Sheet. At June 30, 2019 and December 31, 2018, Receivables - Trade and other includes $12.6 million and $10.4 million |
Leases (Notes)
Leases (Notes) | 6 Months Ended |
Jun. 30, 2019 | |
Leases [Abstract] | |
Leases of Lessee Disclosure [Text Block] | LEASES We are a lessee through noncancellable lease agreements for property and equipment consisting primarily of buildings, land, vehicles, and equipment used in both our operations and administrative functions. We recognize a lease liability with an offsetting right-of-use asset in our Condensed Consolidated Balance Sheet for operating leases based on the present value of the future lease payments. As an accounting policy, we have elected to combine lease and non-lease components for all classes of leased assets in our calculation of the lease liability and the offsetting right-of-use asset. Our lease agreements require both fixed and variable periodic payments, with initial terms typically ranging from one year to 15 years , but a certain land lease has a term of 108 years . Payment provisions in certain of our lease agreements contain escalation factors which may be based on stated rates or a change in a published index at a future time. The amount by which a lease escalates based on the change in a published index, which is not known at lease commencement, is considered a variable payment and is not included in the present value of the future lease payments, which only includes those that are stated or can be calculated based on the lease agreement at lease commencement. In addition to the noncancellable periods, many of our lease agreements provide for one or more extensions of the lease agreement for periods ranging from one year in length to an indefinite number of times following the specified contract term. Other lease agreements provide for extension terms that allow us to utilize the identified leased asset for an indefinite period of time so long as the asset continues to be utilized in our operations. In consideration of these renewal features, we assess the term of the lease agreements, which includes using judgment in the determination of which renewal periods and termination provisions, when at our sole election, will be reasonably certain of being exercised. Periods after the initial term or extension terms that allow for either party to the lease to cancel the lease are not considered in the assessment of the lease term. Additionally, we have elected to exclude leases with an original term of one year or less, including renewal periods, from the calculation of the lease liability and the offsetting right-of-use asset. We used judgment in determining the discount rate upon which the present value of the future lease payments is determined. This rate is based on a collateralized interest rate corresponding to the term of the lease agreement using company, industry, and market information available. Three Months Ended Six Months Ended 2019 (Thousands) Lease Cost: Operating lease cost $ 2,664 $ 5,166 Short-term lease cost — — Variable lease cost 2,732 4,124 Total lease cost $ 5,396 $ 9,290 Cash paid for amounts included in the measurement of operating lease liabilities $ 2,896 $ 5,284 June 30, 2019 (Thousands) Other Information: Right-of-use assets $ 91,516 Operating lease liabilities: Current (included in Accrued liabilities in our Condensed Consolidated Balance Sheet) $ 3,051 Lease liability $ 87,410 Weighted-average remaining lease term - operating leases (years) 16 Weighted-average discount rate - operating leases 5 % As of June 30, 2019, the following table represents our operating lease maturities, including renewal provisions that we have assessed as being reasonably certain of exercise, for each of the years ended December 31: (Thousands) 2019 (remainder) $ 3,987 2020 7,615 2021 9,644 2022 9,625 2023 9,628 Thereafter 92,848 Total future lease payments 133,347 Less amount representing interest 42,886 Total obligations under operating leases $ 90,461 |
Contingent Liabilities and Comm
Contingent Liabilities and Commitments (Notes) | 6 Months Ended |
Jun. 30, 2019 | |
Commitments and Contingencies Disclosure [Abstract] | |
Contingent Liabilities and Commitments | CONTINGENT LIABILITIES AND COMMITMENTS Rate Matters General rate case (Docket No. RP18-1126) On August 31, 2018, we filed a general rate case with the FERC for an overall increase in rates and to comply with the terms of the settlement in our prior rate case to file a rate case no later than August 31, 2018. On September 28, 2018, the FERC issued an order accepting and suspending our general rate filing to be effective March 1, 2019, subject to refund and the outcome of a hearing, except that rates for certain services that were proposed as overall rate decreases were accepted, without suspension, to be effective October 1, 2018. The decreased rates will not be subject to refund but may be subject to decrease prospectively under Section 5 of the Natural Gas Act of 1938, as amended. On March 18, 2019, the FERC accepted our motion to place the rates that were suspended by the September 28, 2018 order into effect on March 1, 2019, subject to refund. As of June 30, 2019, we have accrued a reserve for rate refunds of approximately $85.9 million , which we believe is adequate for any refunds that may be required. Notice of Inquiry (Docket No. PL19-4-000) On March 21, 2019, the FERC issued a Notice of Inquiry (NOI) in Docket No. PL19-4-000, seeking comments regarding whether and, if so, how FERC should revise its policies for determining the base return on equity (ROE) used in setting rates charged by jurisdictional public utilities. FERC also seeks comment on, among other things, whether FERC should change its ROE policies for interstate natural gas and oil pipelines to align with is policy for electric public utilities. FERC's action follows a decision from the United States Court of Appeals for the District of Columbia Circuit, which vacated and remanded a series of earlier FERC orders establishing a new base ROE for certain electric transmission owners. Following that decision, FERC proposed in the remanded proceedings that it rely on four financial models to establish ROEs for the affected utilities rather than rely primarily on its long-used, two-step Discounted Cash Flow model. In the NOI, FERC poses a series of questions and invited comments on this proposed new approach, including whether it should apply the new approach to future proceedings involving interstate natural gas and oil pipeline ROEs. We are currently monitoring this proceeding. Station 62 Incident On October 8, 2015, an explosion and fire occurred at our Compressor Station No. 62 in Gibson, Louisiana. At the time of the incident, planned facility maintenance was being performed at the station and the facility was not operational. The incident was related to maintenance work being performed on the slug catcher at the station. Four contractor employees were killed in the incident and others were injured. In responding to the incident, we cooperated with local, state and federal authorities, including the Louisiana State Police, Terrebonne Parish, the Louisiana Department of Environmental Quality, the U.S. Environmental Protection Agency (Region 6), the Occupational Safety and Health Administration, and the U.S. Department of Transportation's Pipeline and Hazardous Materials Safety Administration (PHMSA). On July 29, 2016, PHMSA issued a Notice of Probable Violation (NOPV), which includes a $1.6 million proposed civil penalty to us in connection with the incident. This penalty was accrued in the second quarter of 2016 and would not be covered by our insurance policies. We filed a response to the NOPV on August 25, 2016, and on July 14, 2017, PHMSA held a hearing on the NOPV. On December 20, 2018, the PHMSA issued a Final Order, which made findings of violation, reduced the civil penalty to $1.4 million , and specified actions that need to be taken by us to comply with pipeline safety regulations. The incident did not cause any rupture of the gas pipeline or any damage to the building containing the compressor engines. In anticipation of the planned maintenance, our Southeast Louisiana Lateral was taken out of service on October 4, 2015, which affected approximately 200 MMcf/d of natural gas production. The lateral was restored to service in early 2016 after repairs were made to the facilities damaged in the incident. We, with the insurer of one of our contractors, have settled all claims against us for wrongful death and all but one of the claims for personal injury. In addition, we are a defendant in other lawsuits seeking damages for off-site property damages. We believe it is reasonably possible that losses will be incurred on some of these remaining lawsuits. However, in management's judgment, the ultimate resolution of these matters will not have a material effect on our financial condition, results of operations, or cash flows. While we also have claims for indemnification, we continue to believe that it is probable that any ultimate losses incurred will be covered by our contractors' insurance and our insurance. Environmental Matters We have had studies underway for many years to test some of our facilities for the presence of toxic and hazardous substances such as polychlorinated biphenyls (PCBs) and mercury to determine to what extent, if any, remediation may be necessary. We have also similarly evaluated past on-site disposal of hydrocarbons at a number of our facilities. We have worked closely with and responded to data requests from the U.S. Environmental Protection Agency (EPA) and state agencies regarding such potential contamination of certain of our sites. We are conducting environmental assessments and implementing a variety of remedial measures that may result in increases or decreases in the total estimated costs. At June 30, 2019 , we had a balance of approximately $3.1 million for the expense portion of these estimated costs, $1.3 million recorded in Accrued liabilities and $1.8 million recorded in Other Long-Term Liabilities - Other in the accompanying Condensed Consolidated Balance Sheet. At December 31, 2018 , we had a balance of approximately $3.5 million for the expense portion of these estimated costs, $1.5 million recorded in Accrued liabilities and $2.0 million recorded in Other Long-Term Liabilities - Other in the accompanying Condensed Consolidated Balance Sheet. We have been identified as a potentially responsible party (PRP) at various Superfund and state waste disposal sites. Based on present volumetric estimates and other factors, our estimated aggregate exposure for remediation of these sites is less than $0.5 million . The estimated remediation costs for all of these sites are included in the environmental liabilities discussed above. Liability under the Comprehensive Environmental Response, Compensation and Liability Act and applicable state law can be joint and several with other PRPs. Although volumetric allocation is a factor in assessing liability, it is not necessarily determinative; thus, the ultimate liability could be substantially greater than the amounts described above. The EPA and various state regulatory agencies routinely promulgate and propose new rules, and issue updated guidance to existing rules. These rulemakings include, but are not limited to, rules for reciprocating internal combustion engine and combustion turbine maximum achievable control technology, air quality standards for one-hour nitrogen dioxide emissions, and volatile organic compound and methane new source performance standards impacting design and operation of storage vessels, pressure valves, and compressors. The EPA previously issued its rule regarding National Ambient Air Quality Standards for ground-level ozone. We are monitoring the rule’s implementation as it will trigger additional federal and state regulatory actions that may impact our operations. Implementation of the regulations is expected to result in impacts to our operations and increase the cost of additions to Total property, plant and equipment, net in the Condensed Consolidated Balance Sheet for both new and existing facilities in affected areas. We are unable to reasonably estimate the cost of additions that may be required to meet the regulations at this time due to uncertainty created by various legal challenges to these regulations and the need for further specific regulatory guidance. We consider prudently incurred environmental assessment and remediation costs and the costs associated with compliance with environmental standards to be recoverable through rates. To date, we have been permitted recovery of environmental costs, and it is our intent to continue seeking recovery of such costs through future rate filings. Other Matters Various other proceedings are pending against us and are considered incidental to our operations. Summary We estimate that for all matters for which we are able to reasonably estimate a range of loss, including those noted above and others that are not individually significant, our aggregate reasonably possible losses beyond amounts accrued for all of our contingent liabilities are immaterial to our expected future annual results of operations, liquidity and financial position. These calculations have been made without consideration of any potential recovery from third parties. We have disclosed all significant matters for which we are unable to reasonably estimate a range of possible loss. |
Debt and Financing Arrangements
Debt and Financing Arrangements (Notes) | 6 Months Ended |
Jun. 30, 2019 | |
Debt Disclosure [Abstract] | |
Debt and Financing Arrangements | DEBT AND FINANCING ARRANGEMENTS Credit Facility We, along with Williams and Northwest Pipeline LLC (Northwest) (the “borrowers”), are party to a Credit Agreement with aggregate commitments available of $4.5 billion , with up to an additional $500 million increase in aggregate commitments available under certain circumstances. We and Northwest are each subject to a $500 million borrowing sublimit. Letter of credit commitments of $1.0 billion are, subject to the $500 million borrowing sublimit applicable to us and Northwest, available to the borrowers. At June 30, 2019, no letters of credit have been issued and no loans were outstanding under the credit facility. Williams participates in a commercial paper program and Williams management considers amounts outstanding under this program to be a reduction of available capacity under the credit facility. The program allows a maximum outstanding amount at any time of $4.0 billion of unsecured commercial paper notes. At June 30, 2019, Williams had no outstanding commercial paper. Other Financing Obligations Dalton Expansion Project During the first six months of 2019, we received an additional $0.7 million of funding from a co-owner for its proportionate share of construction costs related to its undivided ownership interest in the Dalton lateral. This additional funding is reflected in Long-Term Debt on our Condensed Consolidated Balance Sheet. At June 30, 2019, the amount included in Long-Term Debt on our Condensed Consolidated Balance Sheet for this financing obligation is $257.8 million , and the amount included in Long-term debt due within one year on our Condensed Consolidated Balance Sheet for this financing obligation is $2.0 million . Atlantic Sunrise Project During the first six months of 2019, we received an additional $19.7 million of funding from a co-owner for its proportionate share of construction costs related to its undivided ownership interest in certain parts of the project. This additional funding is reflected in Long-Term Debt on our Condensed Consolidated Balance Sheet. At June 30, 2019, the amount included in Long-Term Debt on our Condensed Consolidated Balance Sheet for this financing obligation is $805.0 million , and the amount included in Long-term debt due within one year on our Condensed Consolidated Balance Sheet for this financing obligation is $14.9 million . Long-Term Debt Due Within One Year The long-term debt due within one year at June 30, 2019 is associated with the previously described other financing obligations. |
ARO Trust (Notes)
ARO Trust (Notes) | 6 Months Ended |
Jun. 30, 2019 | |
Investments, Debt and Equity Securities [Abstract] | |
ARO Trust | ARO TRUST We are entitled to collect in rates the amounts necessary to fund our asset retirement obligations (ARO). We deposit monthly, into an external trust account (ARO Trust), the revenues specifically designated for ARO. The ARO Trust carries a moderate risk portfolio. The Money Market Funds held in our ARO Trust are considered investments. We measure the financial instruments held in our ARO Trust at fair value. However, in accordance with the ASC Topic 980, Regulated Operations, both realized and unrealized gains and losses of the ARO Trust are recorded as regulatory assets or liabilities. Effective March 1, 2019, the annual funding obligation is approximately $35.9 million , with deposits made monthly. Investments within the ARO Trust at fair value were as follows (in millions): June 30, 2019 December 31, 2018 Amortized Cost Basis Fair Value Amortized Cost Basis Fair Value Money Market Funds $ 19.0 $ 19.0 $ 21.7 $ 21.7 U.S. Equity Funds 54.7 75.8 46.4 56.8 International Equity Funds 25.4 27.6 21.9 21.4 Municipal Bond Funds 59.3 60.4 50.1 49.6 Total $ 158.4 $ 182.8 $ 140.1 $ 149.5 |
Fair Value Measurements (Notes)
Fair Value Measurements (Notes) | 6 Months Ended |
Jun. 30, 2019 | |
Fair Value Disclosures [Abstract] | |
Fair Value Measurements | FAIR VALUE MEASUREMENTS The following table presents, by level within the fair value hierarchy, certain of our financial assets and liabilities. The carrying values of short-term financial assets (advances to and from affiliate) that have variable interest rates, accounts receivable and accounts payable approximate fair value because of the short-term nature of these instruments. Therefore, these assets and liabilities are not presented in the following table. Fair Value Measurements Using Carrying Amount Fair Value Quoted Prices In Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Millions) Assets (liabilities) at June 30, 2019: Measured on a recurring basis: ARO Trust investments $ 182.8 $ 182.8 $ 182.8 $ — $ — Additional disclosures: Long-term debt, including current portion (4,027.8 ) (5,177.1 ) — (5,177.1 ) — Assets (liabilities) at December 31, 2018: Measured on a recurring basis: ARO Trust investments $ 149.5 $ 149.5 $ 149.5 $ — $ — Additional disclosures: Long-term debt, including current portion (4,014.4 ) (4,785.5 ) — (4,785.5 ) — Fair Value Methods The following methods and assumptions were used to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value: ARO Trust investments — We deposit a portion of our collected rates, pursuant to the terms of the Docket No. RP18-1126 rate case, into the ARO Trust which is specifically designated to fund future asset retirement obligations. The ARO Trust invests in a portfolio of actively traded mutual funds that are measured at fair value on a recurring basis based on quoted prices in an active market and are reported in Other Assets-Other in the Condensed Consolidated Balance Sheet. However, both realized and unrealized gains and losses are ultimately recorded as regulatory assets or liabilities. See Note 6 for more information regarding the ARO Trust. Long-term debt — The disclosed fair value of our long-term debt is determined primarily by a market approach using broker quoted indicative period-end bond prices. The quoted prices are based on observable transactions in less active markets for our debt or similar instruments. The fair value of the financing obligations associated with our Dalton and Atlantic Sunrise expansions, which are included within long-term debt, were determined using an income approach (See Note 5). Reclassifications of fair value between Level 1, Level 2, and Level 3 of the fair value hierarchy, if applicable, are made at the end of each quarter. No transfers between Level 1 and Level 2 occurred during the six months ended June 30, 2019 or 2018 . |
Transactions with Affiliates (N
Transactions with Affiliates (Notes) | 6 Months Ended |
Jun. 30, 2019 | |
Related Party Transactions [Abstract] | |
Transactions with Affiliates | TRANSACTIONS WITH AFFILIATES We are a participant in Williams' cash management program, and we receive advances from and make advances to Williams. At June 30, 2019, our advances from Williams totaled approximately $34.3 million and are classified as Payables - Advances from affiliates in the accompanying Condensed Consolidated Balance Sheet. At December 31, 2018, our advances to Williams totaled approximately $33.0 million and are classified as Receivables - Advances to affiliate in the accompanying Condensed Consolidated Balance Sheet. Advances are stated at the historical carrying amounts. Interest income and expense are recognized when chargeable and collectability is reasonably assured. The interest rate on these intercompany demand notes is based upon the daily overnight investment rate paid on Williams' excess cash at the end of each month. At June 30, 2019, the interest rate was 2.27 percent . Included in Operating Revenues in the accompanying Condensed Consolidated Statement of Comprehensive Income are revenues received from affiliates of $2.3 million and $5.6 million for the three and six months ended June 30, 2019, respectively, and $1.5 million and $3.3 million for the three and six months ended June 30, 2018, respectively. The rates charged to provide sales and services to affiliates are the same as those that are charged to similarly-situated nonaffiliated customers. Included in Cost of natural gas sales in the accompanying Condensed Consolidated Statement of Comprehensive Income are cost of gas purchased from affiliates of $0.6 million and $2.2 million for the three and six months ended June 30, 2019, respectively, and $1.8 million and $3.7 million for the three and six months ended June 30, 2018, respectively. All gas purchases are made at market or contract prices. We have no employees. Services necessary to operate our business are provided to us by Williams and certain affiliates of Williams. We reimburse Williams and its affiliates for all direct and indirect expenses incurred or payments made (including salary, bonus, incentive compensation and benefits) in connection with these services. Employees of Williams also provide general, administrative and management services to us, and we are charged for certain administrative expenses incurred by Williams. These charges are either directly identifiable or allocated to our assets. Direct charges are for goods and services provided by Williams at our request. Allocated charges are based on a three-factor formula, which considers revenues; property, plant and equipment; and payroll. In management’s estimation, the allocation methodologies used are reasonable and result in a reasonable allocation to us of our costs of doing business incurred by Williams. We were billed $112.4 million and $204.6 million in the three and six months ended June 30, 2019, respectively, and $99.3 million and $190.8 million in the three and six months ended June 30, 2018, respectively, for these services. Such expenses are primarily included in Operation and maintenance and Administrative and general expenses in the accompanying Condensed Consolidated Statement of Comprehensive Income. The amount billed to us for the six months ended June 30, 2019, includes $12.9 million recognized in the second quarter for estimated severance and related costs driven by a voluntary separation program associated with a review of Williams' enterprise cost structure. We provide services to certain of our affiliates. We recorded reductions in operating expenses for services provided to and reimbursed by our affiliates of $1.1 million and $2.3 million for the three and six months ended June 30, 2019, respectively, and $1.2 million and $2.2 million for the three and six months ended June 30, 2018, respectively. We made equity distributions totaling $346.0 million and $190.0 million during the six months ended June 30, 2019 and 2018 , respectively. During July 2019, we made an additional distribution of $213.0 million . Our parent made contributions to us totaling $340.0 million in the six months ended June 30, 2018 , to fund a portion of our expenditures for additions to property, plant and equipment. |
Revenue Recognition Revenue Rec
Revenue Recognition Revenue Recognition (Tables) | 6 Months Ended |
Jun. 30, 2019 | |
Revenue Recognition [Abstract] | |
Contract with Customer, Asset and Liability [Table Text Block] | The following table presents a reconciliation of our contract liabilities: Quarter to Date June 30, 2019 Year to Date June 30, 2019 (Thousands) Balance at beginning of period $ 234,092 $ 236,730 Payments received and deferred — — Recognized in revenue (2,641 ) (5,279 ) Balance at end of period $ 231,451 $ 231,451 |
Contract with Customer, Liability [Table Text Block] | The following table presents the amount of the contract liabilities balance as of June 30, 2019, expected to be recognized as revenue in each of the next five years as performance obligations are expected to be satisfied: (Thousands) 2019 (remainder) $ 5,287 2020 10,568 2021 10,566 2022 10,566 2023 10,566 Thereafter 183,898 Total $ 231,451 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] | The following table presents the transaction price allocated to the remaining performance obligations under certain contracts as of June 30, 2019. These primarily include reservation charges on contracted capacity on our firm transportation and storage contracts with customers. Amounts from certain contracts included in the table below, which are subject to the periodic review and approval by the FERC, reflect the rates for such services in our current FERC tariffs, net of estimated reserve for refund, for the life of the related contracts; however, these rates may change based on future tariffs approved by the FERC and the amount and timing of these changes is not currently known. This table excludes the variable consideration component for commodity charges. It also excludes consideration that will be recognized in future periods (see above for Contract Liabilities and the expected recognition of those amounts within revenue). Certain of our contracts contain evergreen provisions for periods beyond the initial term of the contract. The remaining performance obligations as of June 30, 2019, do not consider potential future performance obligations for which the renewal has not been exercised. The table below also does not include contracts with customers for which the underlying facilities have not received FERC authorization to be placed into service. (Thousands) 2019 (remainder) $ 1,110,171 2020 2,115,390 2021 1,994,257 2022 1,766,701 2023 1,447,332 Thereafter 13,545,469 Total $ 21,979,320 |
Leases Leases (Tables)
Leases Leases (Tables) | 6 Months Ended |
Jun. 30, 2019 | |
Leases [Abstract] | |
Lease, Cost [Table Text Block] | Three Months Ended Six Months Ended 2019 (Thousands) Lease Cost: Operating lease cost $ 2,664 $ 5,166 Short-term lease cost — — Variable lease cost 2,732 4,124 Total lease cost $ 5,396 $ 9,290 Cash paid for amounts included in the measurement of operating lease liabilities $ 2,896 $ 5,284 June 30, 2019 (Thousands) Other Information: Right-of-use assets $ 91,516 Operating lease liabilities: Current (included in Accrued liabilities in our Condensed Consolidated Balance Sheet) $ 3,051 Lease liability $ 87,410 Weighted-average remaining lease term - operating leases (years) 16 Weighted-average discount rate - operating leases 5 % |
Lessee, Operating Lease, Liability, Maturity [Table Text Block] | As of June 30, 2019, the following table represents our operating lease maturities, including renewal provisions that we have assessed as being reasonably certain of exercise, for each of the years ended December 31: (Thousands) 2019 (remainder) $ 3,987 2020 7,615 2021 9,644 2022 9,625 2023 9,628 Thereafter 92,848 Total future lease payments 133,347 Less amount representing interest 42,886 Total obligations under operating leases $ 90,461 |
ARO Trust (Tables)
ARO Trust (Tables) | 6 Months Ended |
Jun. 30, 2019 | |
Investments, Debt and Equity Securities [Abstract] | |
ARO Trust | Investments within the ARO Trust at fair value were as follows (in millions): June 30, 2019 December 31, 2018 Amortized Cost Basis Fair Value Amortized Cost Basis Fair Value Money Market Funds $ 19.0 $ 19.0 $ 21.7 $ 21.7 U.S. Equity Funds 54.7 75.8 46.4 56.8 International Equity Funds 25.4 27.6 21.9 21.4 Municipal Bond Funds 59.3 60.4 50.1 49.6 Total $ 158.4 $ 182.8 $ 140.1 $ 149.5 |
Fair Value Measurements (Tables
Fair Value Measurements (Tables) | 6 Months Ended |
Jun. 30, 2019 | |
Fair Value Disclosures [Abstract] | |
Fair Value Measurements | The following table presents, by level within the fair value hierarchy, certain of our financial assets and liabilities. The carrying values of short-term financial assets (advances to and from affiliate) that have variable interest rates, accounts receivable and accounts payable approximate fair value because of the short-term nature of these instruments. Therefore, these assets and liabilities are not presented in the following table. Fair Value Measurements Using Carrying Amount Fair Value Quoted Prices In Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (Millions) Assets (liabilities) at June 30, 2019: Measured on a recurring basis: ARO Trust investments $ 182.8 $ 182.8 $ 182.8 $ — $ — Additional disclosures: Long-term debt, including current portion (4,027.8 ) (5,177.1 ) — (5,177.1 ) — Assets (liabilities) at December 31, 2018: Measured on a recurring basis: ARO Trust investments $ 149.5 $ 149.5 $ 149.5 $ — $ — Additional disclosures: Long-term debt, including current portion (4,014.4 ) (4,785.5 ) — (4,785.5 ) — |
Basis of Presentation (Details)
Basis of Presentation (Details) - USD ($) $ in Thousands | 6 Months Ended | |||
Jun. 30, 2019 | Jun. 30, 2018 | Jan. 01, 2019 | Dec. 31, 2018 | |
Schedule of Equity Method Investments [Line Items] | ||||
Distribution from unconsolidated affiliates | $ 2,496 | $ 931 | ||
Payments to Pine Needle for repayment of debt | 12,250 | 0 | ||
Prior Period Adjustment [Abstract] | ||||
Prior Period Reclassification Adjustment | $ 5,000 | |||
Revenue subject to refund [Abstract] | ||||
Reserve for rate refund | 85,853 | $ 0 | ||
New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||
Lease liability | 90,461 | |||
Right-of-use assets | $ 91,516 | $ 0 | ||
Cardinal Pipeline Company, LLC [Member] | ||||
Schedule of Equity Method Investments [Line Items] | ||||
Equity Method Investment, Ownership Percentage | 45.00% | 45.00% | ||
Pine Needle LNG Company, LLC [Member] | ||||
Schedule of Equity Method Investments [Line Items] | ||||
Equity Method Investment, Ownership Percentage | 35.00% | 35.00% | ||
Accounting Standards Update 2016-02 [Member] | ||||
New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||
Lease liability | $ 91,300 | |||
Right-of-use assets | $ 91,300 |
Revenue Recognition Contract Li
Revenue Recognition Contract Liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | ||
Jun. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | |
Revenue Recognition [Abstract] | ||||
Contract with Customer, Liability | $ 231,451 | $ 231,451 | $ 234,092 | $ 236,730 |
Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Estimate of Transaction Price | 0 | 0 | ||
Contract with Customer, Liability, Revenue Recognized | (2,641) | (5,279) | ||
Performance Obligations Related To Contract Liabilities [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01 | ||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||
Revenue, Remaining Performance Obligation, Amount | $ 5,287 | $ 5,287 | ||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 6 months | 6 months | ||
Performance Obligations Related To Contract Liabilities [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01 | ||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||
Revenue, Remaining Performance Obligation, Amount | $ 10,568 | $ 10,568 | ||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year | 1 year | ||
Performance Obligations Related To Contract Liabilities [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | ||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||
Revenue, Remaining Performance Obligation, Amount | $ 10,566 | $ 10,566 | ||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year | 1 year | ||
Performance Obligations Related To Contract Liabilities [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | ||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||
Revenue, Remaining Performance Obligation, Amount | $ 10,566 | $ 10,566 | ||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year | 1 year | ||
Performance Obligations Related To Contract Liabilities [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | ||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||
Revenue, Remaining Performance Obligation, Amount | $ 10,566 | $ 10,566 | ||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year | 1 year | ||
Performance Obligations Related To Contract Liabilities [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | ||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||
Revenue, Remaining Performance Obligation, Amount | $ 183,898 | $ 183,898 | ||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year | 1 year | ||
Performance Obligations Related To Contract Liabilities [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil) | ||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||
Revenue, Remaining Performance Obligation, Amount | $ 231,451 | $ 231,451 |
Revenue Recognition Remaining P
Revenue Recognition Remaining Performance Obligation (Details) - Remaining Performance Obligations [Member] $ in Thousands | Jun. 30, 2019USD ($) |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01 | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Amount | $ 1,110,171 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 6 months |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01 | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Amount | $ 2,115,390 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Amount | $ 1,994,257 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Amount | $ 1,766,701 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Amount | $ 1,447,332 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Amount | $ 13,545,469 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil) | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Amount | $ 21,979,320 |
Revenue Recognition Accounts Re
Revenue Recognition Accounts Receivable (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018 |
Other Receivable [Member] | ||
Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
Receivables, Net, Current | $ 12.6 | $ 10.4 |
Leases (Details)
Leases (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | |
Jun. 30, 2019 | Jun. 30, 2019 | Dec. 31, 2018 | |
Lessee, Lease, Description [Line Items] | |||
Lessee, Operating Lease, Term of Contract | 108 years | 108 years | |
Operating lease cost | $ 2,664 | $ 5,166 | |
Short-term lease cost | 0 | 0 | |
Variable lease cost | 2,732 | 4,124 | |
Total lease cost | 5,396 | 9,290 | |
Cash paid for amonts included in measurement of operating lease liabilities | 2,896 | 5,284 | |
Right-of-use assets | 91,516 | 91,516 | $ 0 |
Current (included in Accrued liabilities in our Condensed Consolidated Balance Sheet) | 3,051 | 3,051 | |
Lease liability | $ 87,410 | $ 87,410 | $ 0 |
Weighted-average remaining lease term - operating leases (years) | 16 years | 16 years | |
Weighted-average discount rate - operating leases | 5.00% | 5.00% | |
2019 (remainder) | $ 3,987 | $ 3,987 | |
2020 | 7,615 | 7,615 | |
2021 | 9,644 | 9,644 | |
2022 | 9,625 | 9,625 | |
2023 | 9,628 | 9,628 | |
Thereafter | 92,848 | 92,848 | |
Total future lease payments | 133,347 | 133,347 | |
Less amount representing interest | 42,886 | 42,886 | |
Total obligations under operating leases | $ 90,461 | $ 90,461 | |
Minimum [Member] | |||
Lessee, Lease, Description [Line Items] | |||
Lessee, Operating Lease, Term of Contract | 1 year | 1 year | |
Maximum [Member] | |||
Lessee, Lease, Description [Line Items] | |||
Lessee, Operating Lease, Term of Contract | 15 years | 15 years |
Contingent Liabilities and Co_2
Contingent Liabilities and Commitments (Details) - USD ($) $ in Millions | 6 Months Ended | |||
Jun. 30, 2019 | Dec. 31, 2018 | Dec. 20, 2018 | Jul. 29, 2016 | |
Environmental assessment and remediation [Member] | ||||
Site Contingency [Line Items] | ||||
Accrued environmental assessment and remediation costs, total | $ 3.1 | $ 3.5 | ||
Accrued environmental assessment and remediation costs, current | 1.3 | 1.5 | ||
Accrued environmental assessment and remediation costs, noncurrent | 1.8 | $ 2 | ||
Potentially responsible party at various Superfund and state waste disposal sites [Member] | Maximum [Member] | ||||
Site Contingency [Line Items] | ||||
Site Contingency, Loss Exposure Not Accrued, Best Estimate | $ 0.5 | |||
Accrued Liabilities | ||||
Site Contingency [Line Items] | ||||
Notice of Penalty | $ 1.4 | $ 1.6 |
Contingent Liabilities and Co_3
Contingent Liabilities and Commitments Commitments and Contingencies (Details) $ in Millions | Jun. 30, 2019USD ($) |
Revenue subject to refund [Abstract] | |
Reserve for rate refund | $ 85.9 |
Debt and Financing Arrangemen_2
Debt and Financing Arrangements Line of Credit Facility (Details) | Jun. 30, 2019USD ($) |
Letter of credit [Member] | |
Line of Credit Facility [Line Items] | |
Line of Credit Facility, Maximum Borrowing Capacity | $ 500,000,000 |
Williams Companies Inc [Member] | Letter of credit [Member] | |
Line of Credit Facility [Line Items] | |
Line of Credit Facility, Maximum Borrowing Capacity | 1,000,000,000 |
Credit Agreement Member] | |
Line of Credit Facility [Line Items] | |
Line of Credit Facility, Maximum Borrowing Capacity | 500,000,000 |
Letters of credit outstanding, amount | 0 |
Line of credit facility, amount outstanding | 0 |
Commercial paper, outstanding | 0 |
Credit Agreement Member] | Williams Companies Inc [Member] | |
Line of Credit Facility [Line Items] | |
Line of Credit Facility, Maximum Borrowing Capacity | 4,500,000,000 |
Additional Amount By Which Credit Facility Can Be Increased | 500,000,000 |
Commercial Paper [Member] | Williams Companies Inc [Member] | |
Line of Credit Facility [Line Items] | |
Line of Credit Facility, Maximum Borrowing Capacity | $ 4,000,000,000 |
Debt and Financing Arrangemen_3
Debt and Financing Arrangements Long-Term Debt Instruments (Details) - USD ($) $ in Thousands | 6 Months Ended | |
Jun. 30, 2019 | Dec. 31, 2018 | |
Debt Instrument [Line Items] | ||
Long-Term Debt | $ 4,010,847 | $ 3,998,988 |
Long-term debt due within one year | 16,904 | $ 15,419 |
Dalton Expansion Project | ||
Debt Instrument [Line Items] | ||
Proceeds from Issuance of Other Long-term Debt | 700 | |
Long-Term Debt | 257,800 | |
Long-term debt due within one year | 2,000 | |
Atlantic Sunrise Project [Member] | ||
Debt Instrument [Line Items] | ||
Proceeds from Issuance of Other Long-term Debt | 19,700 | |
Long-Term Debt | 805,000 | |
Long-term debt due within one year | $ 14,900 |
ARO Trust (Details)
ARO Trust (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018 |
Investments, Debt and Equity Securities [Abstract] | ||
Annual funding obligation | $ 35.9 | |
Debt Securities, Available-for-sale [Line Items] | ||
Trading Securities, Equity, Cost | 158.4 | $ 140.1 |
Trading Securities, Equity | 182.8 | 149.5 |
Money Market Funds [Member] | ||
Debt Securities, Available-for-sale [Line Items] | ||
Trading Securities, Equity, Cost | 19 | 21.7 |
Trading Securities, Equity | 19 | 21.7 |
U.S. Equity Funds [Member] | ||
Debt Securities, Available-for-sale [Line Items] | ||
Trading Securities, Equity, Cost | 54.7 | 46.4 |
Trading Securities, Equity | 75.8 | 56.8 |
International Equity Funds [Member] | ||
Debt Securities, Available-for-sale [Line Items] | ||
Trading Securities, Equity, Cost | 25.4 | 21.9 |
Trading Securities, Equity | 27.6 | 21.4 |
Municipal Bond Funds [Member] | ||
Debt Securities, Available-for-sale [Line Items] | ||
Trading Securities, Equity, Cost | 59.3 | 50.1 |
Trading Securities, Equity | $ 60.4 | $ 49.6 |
Fair Value Measurements (Detail
Fair Value Measurements (Details) - USD ($) | Jun. 30, 2019 | Dec. 31, 2018 | Jun. 30, 2018 |
Fair Value, Transfers Between Level 1 and Level 2, Description and Policy [Abstract] | |||
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount | $ 0 | $ 0 | |
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount | 0 | 0 | |
Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount | 0 | 0 | |
Fair Value, Liabilities, Level 2 to Level 1 Transfers, Amount | 0 | $ 0 | |
Fair Value, Inputs, Level 1 [Member] | |||
Additional Fair Value Elements [Abstract] | |||
Long-term debt, including current portion | 0 | $ 0 | |
Fair Value, Inputs, Level 2 [Member] | |||
Additional Fair Value Elements [Abstract] | |||
Long-term debt, including current portion | (5,177,100,000) | (4,785,500,000) | |
Fair Value, Inputs, Level 3 [Member] | |||
Additional Fair Value Elements [Abstract] | |||
Long-term debt, including current portion | 0 | 0 | |
Reported Value Measurement [Member] | |||
Additional Fair Value Elements [Abstract] | |||
Long-term debt, including current portion | (4,027,800,000) | (4,014,400,000) | |
Estimate of Fair Value Measurement [Member] | |||
Additional Fair Value Elements [Abstract] | |||
Long-term debt, including current portion | (5,177,100,000) | (4,785,500,000) | |
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | |||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] | |||
ARO Trust investments | 182,800,000 | 149,500,000 | |
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | |||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] | |||
ARO Trust investments | 0 | 0 | |
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | |||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] | |||
ARO Trust investments | 0 | 0 | |
Fair Value, Measurements, Recurring [Member] | Reported Value Measurement [Member] | |||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] | |||
ARO Trust investments | 182,800,000 | 149,500,000 | |
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | |||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] | |||
ARO Trust investments | $ 182,800,000 | $ 149,500,000 |
Transactions with Affiliates Re
Transactions with Affiliates Related Party Transations (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended | |||
Jul. 31, 2019USD ($) | Jun. 30, 2019USD ($)employee | Jun. 30, 2018USD ($) | Jun. 30, 2019USD ($)employee | Jun. 30, 2018USD ($) | Dec. 31, 2018USD ($) | |
Related Party Transaction [Line Items] | ||||||
Advances from affiliates | $ 34,345 | $ 34,345 | $ 0 | |||
Advances to affiliate | $ 0 | $ 0 | $ 33,034 | |||
Related party transaction, rate | 2.27% | |||||
Entity number of employees | employee | 0 | 0 | ||||
Expenses, related party | $ 112,400 | $ 99,300 | $ 204,600 | $ 190,800 | ||
Severance accrual | 12,900 | |||||
Equity distributions to parent | 346,000 | 190,000 | ||||
Cash contributions from parent | 0 | 340,000 | ||||
Affiliated Entity [Member] | ||||||
Related Party Transaction [Line Items] | ||||||
Operating revenues, related party | 2,300 | 1,500 | 5,600 | 3,300 | ||
Cost of natural gas sales, related party | 600 | 1,800 | 2,200 | 3,700 | ||
Expenses, related party | (1,100) | $ (1,200) | (2,300) | $ (2,200) | ||
Williams Companies Inc [Member] | ||||||
Related Party Transaction [Line Items] | ||||||
Advances to affiliate | $ 33,000 | $ 33,000 | ||||
Subsequent Event [Member] | ||||||
Related Party Transaction [Line Items] | ||||||
Equity distributions to parent | $ 213,000 |