UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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 (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

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 during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

This is a combined Form 10-Q separately filed by Edison International and Southern California Edison Company. Information contained herein relating to an individual company is filed by such company on its own behalf.

GLOSSARY

The following terms and abbreviations appearing in the text of this report have the meanings indicated below.

This quarterly report on Form 10-Q contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements reflect Edison International's and SCE's current expectations and projections about future events based on Edison International's and SCE's knowledge of present facts and circumstances and assumptions about future events and include any statements that do not directly relate to a historical or current fact. Other information distributed by Edison International and SCE that is incorporated in this report, or that refers to or incorporates this report, may also contain forward-looking statements. In this report and elsewhere, the words "expects," "believes," "anticipates," "estimates," "projects," "intends," "plans," "probable," "may," "will," "could," "would," "should," and variations of such words and similar expressions, or discussions of strategy or plans, are intended to identify forward-looking statements. Such statements necessarily involve risks and uncertainties that could cause actual results to differ materially from those anticipated. Some of the risks, uncertainties and other important factors that could cause results to differ from those currently expected, or that otherwise could impact Edison International and SCE, include, but are not limited to the:

Additional information about risks and uncertainties, including more detail about the factors described in this report, is contained throughout this report and in the 20172018 Form 10-K, including the "Risk Factors" section. Readers are urged to read this entire report, including information incorporated by reference, as well as the 20172018 Form 10-K, and carefully consider the risks, uncertainties, and other factors that affect Edison International's and SCE's businesses. Forward-looking statements speak only as of the date they are made and neither Edison International nor SCE are obligated to publicly update or revise forward-looking statements. Readers should review future reports filed by Edison International and SCE with the SEC. Edison International and SCE provide direct links to certain SCE and other parties' regulatory filings and documents with the CPUC and the FERC and certain agency rulings and notices in open proceedings at www.edisoninvestor.com (SCE Regulatory Highlights) so that such filings, rulings and notices are available to all investors. Edison International and SCE post or provide direct links to certain documents and information related to Southern California wildfires which may be of interest to investors at www.edisoninvestor.com (Southern California Wildfires) in order to publicly disseminate such information. Edison International and SCE also routinely post or provide direct links to presentations, documents and other information that may be of interest to investors at www.edisoninvestor.com (Events and Presentations) in order to publicly disseminate such information.

The MD&A for the six months ended June 30, 20182019 discusses material changes in the consolidated financial condition, results of operations and other developments of Edison International and SCE since December 31, 2017,2018 and as compared to the six months ended June 30, 2017.2018. This discussion presumes that the reader has read or has access to Edison International's and SCE's MD&A for the calendar year 20172018 (the "year-ended 20172018 MD&A"), which was included in the 20172018 Form 10-K.

Except when otherwise stated, references to each of Edison International, SCE, or Edison Energy Group mean each such company with its subsidiaries on a consolidated basis. References to "Edison International Parent and Other" mean Edison International Parent and its consolidated competitive subsidiaries and "Edison International Parent" mean Edison International on a stand-alone basis, not consolidated with its subsidiaries.

Edison International's earnings are prepared in accordance with GAAP. Management uses core earnings (losses) internally for financial planning and for analysis of performance. Core earnings (losses) are also used when communicating with investors and analysts regarding Edison International's earnings results to facilitate comparisons of the company's performance from period to period. Core earnings (losses) are a non-GAAP financial measure and may not be comparable to those of other companies. Core earnings (losses) are defined as earnings attributable to Edison International shareholders less non-core items. Non-core items include income or loss from discontinued operations income resulting from allocation of losses to tax equity investors under the HLBV accounting method and income or loss from significant discrete items that management does not consider representative of ongoing earnings, such as write downs, asset impairments and other gains and losses related to certain tax, regulatory or legal settlements or proceedings, and exit activities, including sale of certain assets and other activities that are no longer continuing.

Edison International's second quarter 20182019 earnings decreased $2increased $116 million from the second quarter of 2017, comprised of a decrease2018, resulting from an increase in SCE's earnings of $10$122 million partially offset by an increase in Edison International Parent and Other's losses of $6 million. SCE's higher earnings consisted of $123 million of higher non-core losses and $245 million of higher core earnings. The increase in core earnings was primarily due to the adoption of the 2018 GRC final decision in the second quarter of 2019, the timing of regulatory deferrals related to wildfire insurance and wildfire mitigation costs and higher revenue due to a change in estimate under the FERC formula rate mechanism. The higher non-core losses related to an impairment charge of $170 million ($123 million after-tax) resulting from the disallowance of certain historical capital expenditures in SCE's 2018 GRC final decision.

Edison International's earnings for the six months ended June 30, 2019 increased $176 million from the six months ended June 30, 2018, resulting from an increase in SCE's earnings of $129 million and a decrease in Edison International Parent and Other's losses of $8$47 million. Edison International'sSCE's higher earnings for the six months ended June 30, 2018 decreased $146consisted of $51 million from the six months ended 2017, comprised of a decrease in SCE's earningshigher non-core losses and $180 million of $73 million and anhigher core earnings. The increase in core earnings was primarily due to the adoption of the 2018 GRC final decision in the

Edison International Parent and Other's increase in losses for the three months ended June 30, 2019 was due to higher core losses of $73$4 million and lower non-core income of $2 million. SCE's lower quarter and year-to-date earnings resulted from higher operation and maintenance expenses related to wildfire insurance and higher net financing costs, partially offset by higher revenue. Revenue increased in 2018 due to a refund to customers for prior overcollections recorded in 2017. In the first half of 2018, operation and maintenance expenses were also higher due to increased line clearing activity.

Edison International Parent and Other's decrease in losses for the threesix months ended June 30, 20182019 was due to lower core losses of $6$5 million and higherlower non-core earningslosses of $2$42 million. The decrease in core losses was due to a goodwill

The revenue requirements in the 2018 GRC final decision are retroactive to January 1, 2018. SCE recorded the prior period impact of the 2018 GRC final decision in the second quarter of 2019, including an increase to core lossesearnings of $30$131 million from the application of the decision to revenue, depreciation expense and income tax expense and a non-core impairment of utility property, plant and equipment of $170 million ($123 million after-tax) related to disallowed historical capital expenditures. See “Results of Operations—SCE” and "Notes to Consolidated Financial Statements—Note 11. Regulatory Assets and Liabilities" for further information.

The table below includes $387 million and higher non-core lossesa range of $43 million. The increase in core losses was due$500 million to tax benefits recorded in 2017$700 million of capital expenditures related to stock option exerciseswildfire mitigation for 2019 and the settlement2020, respectively. The CPUC has approved SCE's 2019 WMP and authorized tracking of 2007 – 2012 federal income tax audits along with the impact of Tax Reform on pre-tax losses, partially offset by a goodwill impairment recorded in 2017 and lower corporate expenses in 2018.

In December 2017 severaland November 2018, wind-driven wildfires impacted portions of SCE's service territory, and causedcausing substantial damage to both residential and business properties and service outages for SCE customers. The investigating government agencies, the VCFD and CAL FIRE, have determined that the largest of the 2017 fires originated on December 4, 2017, in the Anlauf Canyon area of Ventura County (the investigating agencies refer to this fire as the "Thomas Fire"), followed shortly thereafter by the Koenigstein Fire. While the progression of these two fires remains under review, the December 4, 2017 fires eventually burned substantial acreage in both Ventura and Santa Barbara Counties. The largest of the November 2018 fires, known as the ThomasWoolsey Fire, originated in Ventura County and burned acreage located in both Ventura and Santa BarbaraLos Angeles Counties. According to

In March 2019, the most recent California Department of ForestryVCFD and Fire Protection incident informationCAL FIRE issued separate reports finding that the Thomas Fire burned over 280,000 acres, destroyed an estimated 1,063 structures, damaged an estimated 280 structures and resultedthe Koenigstein Fire were each caused by SCE equipment. At this time, based on available information, SCE has not determined whether its equipment caused the Thomas Fire. Based on publicly available radar data showing a smoke plume in one fatality.the Anlauf Canyon area emerging in advance of the start time of the Thomas Fire indicated in the Thomas Fire report, SCE believes that the Thomas Fire started at least 12 minutes prior to any issue involving SCE's system and at least 15 minutes prior to the start time indicated in the report. SCE has previously disclosed that SCE believed its equipment was associated with the ignition of the Koenigstein Fire. SCE is continuing to assess the progression of the Thomas and Koenigstein Fires and the extent of damages that may be attributable to each fire.

Determining wildfire originMultiple lawsuits related to the Thomas and cause is oftenKoenigstein Fires and the Woolsey Fire have been initiated against SCE and Edison International. Some of the Thomas and Koenigstein Fires lawsuits claim that SCE and Edison International have

responsibility for the damages caused by the Montecito Mudslides based on a complextheory alleging that SCE has responsibility for the Thomas and/or Koenigstein Fires and time-consuming process, and several investigationsthat the Thomas and/or Koenigstein Fires proximately caused the Montecito Mudslides.

Even when investigations are still pending or liability is disputed, an assessment of likely outcomes, including through future settlement of disputed claims, may require a liability to be attributableaccrued under accounting standards. Based on information available to fires ignited at separate ignition points,SCE and consideration of the risks associated with litigation, Edison International and SCE are currently unableexpect to incur a material loss in connection with the 2017/2018 Wildfire/Mudslide Events and have accrued a liability of $4.7 billion in the fourth quarter of 2018. This liability corresponds to the lower end of the reasonably estimate aestimated range of expected potential losses that may be incurred but such losses may be material.

Edison International and SCE will seek to offset any actual losses realized in connection with the 2017/2018 Wildfire/Mudslide Events with recoveries from insurance policies in place at the time of the events and, to the extent actual losses exceed insurance, through electric rates. In the fourth quarter of 2018, Edison International and SCE also recorded expected recoveries from insurance of $2.0 billion and expected recoveries through FERC electric rates of $135 million, which is the FERC portion of the $4.7 billion liability it accrued. SCE believes that, in light of the CPUC's decision in a cost recovery proceeding involving SDG&E arising from several 2007 wildfires in SDG&E's service area, there is substantial uncertainty regarding how the CPUC will interpret and apply its prudency standard to an investor-owned utility in future wildfire cost-recovery proceedings for fires ignited prior to July 12, 2019. Accordingly, while the CPUC has not made a determination regarding SCE's prudency relative to any of the 2017/2018 Wildfire/Mudslide Events, SCE is unable to conclude, at this time, that uninsured CPUC-jurisdictional wildfire-related costs are pursuingprobable of recovery through electric rates.

Edison International and SCE continue to pursue legislative, regulatory and legal strategies to address the application of a strict liability standard to wildfire-related damages without the ability to recover resulting damagescosts in electric rates.

SCE has committed to make an initial contribution of approximately $2.4 billion by September 10, 2019, and ten annual contributions of approximately $95 million per year starting on January 1, 2020, to the insurance fund. Edison International and SCE cannot predictare evaluating funding options to support SCE's initial contribution to the insurance fund and anticipate raising

If the insurance fund is established, AB 1054 creates a new standard that the CPUC must apply to determine whether a utility was prudent and therefore able to recover wildfire costs through the insurance fund or, if the insurance fund has been exhausted, through electric rates. The new standard, if it is established, will apply to requests for recovery of wildfire costs for wildfires ignited after July 12, 2019. Under AB 1054, prudent conduct occurs when a solution mitigating the significant risk faced byconduct of a California investor-owned utility related to wildfiresthe ignition was consistent with actions that a reasonable utility would have undertaken under similar circumstances, at the relevant point in time, and based on the information available at that time. Utilities with a valid safety certification will be achieved.presumed to have acted prudently related to a wildfire ignition unless a party in the cost recovery proceeding creates serious doubt as to the reasonableness of the utility's conduct, at which time, the burden shifts back to the utility to prove its conduct was reasonable. If a utility does not have a valid safety certification, it will have the burden to prove, based on a preponderance of evidence, that its conduct was prudent.

For further information, see "Notes to Consolidated Financial Statements—Note 12. Commitments and Contingencies—Contingencies—Southern California Wildfires"Wildfires and Mudslides" and "Legal Proceedings—December 2017 Wildfire Litigation."

SCE's results of operations are derived mainly through two sources:

The following table is a summary of SCE's results of operations for the periods indicated.

Earning activities were primarily affected by the following:

Cost-recovery activities were primarily affected by the following:

SCE's retail billed and unbilled revenue (excluding wholesale sales) was $2.6 billion and $2.7 billion for both the three months ended June 30, 2019 and 2018, and 2017, respectively,$5.2 billion and $5.0 billion for both the six months ended June 30, 2019 and 2018, and 2017.respectively.

Retail billed and unbilled revenueThe increase for the threesix months ended June 30, 2018 was lower2019 compared to the same period in 2017 due2018 is primarily related to the cessation ofhigher cost-recovery activities related to 2018 wildfire insurance costs and higher purchased power and fuel costs driven by higher power and gas prices, lower congestion revenue right credits and higher charges from contract amendments, partially offset by lower load related to cooler weather. See "—Cost-Recovery Activities" for San Onofre resulting from the Revised San Onofre Settlement Agreement and refunds to customers for the California energy crisis settlement funds received during 2018.further details.

As a result of the CPUC-authorized decoupling mechanism, SCE earnings are not affected by changes in retail electricity sales (see "Business—SCE—Overview of Ratemaking Process" in the 2017 Form 10-K).sales.

SCE's income tax expense decreasedbenefit increased by $59$66 million and $77$165 million for the three and six months ended June 30, 20182019, respectively, compared to the same periods in 2017.2018.

The effective tax rates were (0.6)(17.8)% and 14.4%(0.6)% for the three months ended June 30, 20182019 and 2017,2018, respectively. The effective tax rates were (1.3)(28.9)% and 8.8%(1.3)% for the six months ended June 30, 20182019 and 2017,2018, respectively. SCE's effective tax rate is below the federal statutory rate of 21% and 35% for 2018 and 2017, respectively, primarily due to CPUC's ratemaking treatment for the current tax benefit arising from certain property-related and other temporary differences, which reverse over time. The accounting treatment for these temporary differences results in recording regulatory assets and liabilities for amounts that would otherwise be recorded to deferred income tax expense. The effective tax rate decrease for the three months and six months ended June 30, 2018 was2019 is primarily due to lower pre-tax income attax benefits on property-related items recorded as a lower federal tax rate.result of 2018 GRC final decision. The effective tax rate decrease for the six months ended June 30, 2017 included2019 also includes the ratemaking treatment onchange in the San Onofreallocation of excess deferred tax abandonment.re-measurement between customers and shareholders as a result of a CPUC resolution issued in February 2019.

See "Notes to Consolidated Financial Statements—Note 8. Income Taxes" for a reconciliation of the federal statutory rate to the effective income tax rates.

The loss from continuing operations of Edison International Parent and Other decreased $8increased $6 million and increased $73decreased $47 million for the three and six months ended June 30, 2018,2019, respectively, compared to the same periods in 2017 primarily due to:2018.

Impact of the 2018 sale and associated goodwill impairment in 2017 for SoCore Energy, resulting in a $12 million decrease in lossesThe increase for the three months ended June 30, 2018 and $36 million increase in losses2019 is primarily driven by higher interest expenses as a result of increased borrowings. The decrease for the six months ended June 30, 2018.

SCE's ability to operate its business, fund capital expenditures, and implement its business strategy is dependent upon its cash flow and access to the bank and capital markets. SCE's overall cash flows fluctuate based on, among other things, its ability to recover its costs in a timely manner from its customers through regulated rates, changes in commodity prices and volumes, collateral requirements, interest obligations, and any dividend payments to and equity contributions from Edison International, andobligations to preferred and preference shareholders, and the outcome of tax and regulatory matters.

In the next 12 months, SCE expects to fund its cash requirements through operating cash flows, tax benefits, and capital market financings, of debt and preferred equity contributions from Edison International, as needed. SCE also has availability under its credit facility to fund cash requirements.

SCE has committed to make an initial contribution of approximately $2.4 billion by September 10, 2019, and ten annual contributions of approximately 95 million per year starting on January 1, 2020, to the wildfire fund expected to be established under AB 1054. Edison International and SCE are evaluating funding options to support SCE's initial contribution to the insurance fund and anticipate raising approximately $1.2 billion from the issuance of Edison International equity and approximately $1.2 billion from the issuance of long-term debt at SCE. SCE also expects to finance approximately $1.6 billion of capital expenses by issuing securitized bonds. If SCE incurs a substantial charge to earnings in the third quarter of 2019 as a result of SCE's anticipated contributions to the insurance fund under AB 1054, SCE may, as a result of

SCE's long-term issuer credit ratings remainedremain at investment grade levels duringafter downgrade actions taken by the major credit agencies in the first six monthsquarter of 2018. However,2019. The following table summarizes SCE's current, long-term issuer credit ratings and outlook from the major credit rating is currently under negative outlook from Moody's Investor Services Inc. and S&P, and under negative watch from Fitch Ratings. agencies:

SCE's credit ratings may be further affected by the ultimate outcome of pending enforcement and litigation matters, including the outcome of the uncertainties and potential liabilities associated with the December 2017 Wildfires2017/2018 Wildfire/Mudslide Events, and the Montecito Mudslides, andeffective reform of policies allocating liability to investor-owned utilities for damages caused by catastrophic wildfires substantially caused by utility equipment, including, without limitation, the underlying inverse condemnation exposure risk created by wildfires.passage of AB 1054. Credit rating downgrades may increase the cost and may impact the availability of short-term and long-term borrowings, including commercial paper, credit facilities, bond financings or other borrowings. In addition, some of SCE's power procurement contracts contain provisions that require SCE to maintain anpay related liabilities or post additional collateral if SCE's credit rating were to fall below investment grade rating from the major credit rating agencies. Incremental collateral requirements for power procurement contracts resulting from a potential downgrade of SCE's credit rating to below investment grade is $15 million as of June 30, 2019. In addition, if SCE's credit rating falls below investment grade, it may be required to post up to $50 million in collateral, in connection with its environmental remediation obligations, within 120 days of the end of the fiscal year in which the downgrade occurs. For further details, see "—Margin and Collateral Deposits."

In May 2018, SCE amended its multi-year revolving credit facility to increase the facility from $2.75 billion to $3.0 billion. At June 30, 2018,2019, SCE had approximately $2.60$2.6 billion available under its $3.0 billion credit facility. TheIn June 2019, SCE extended its credit facility is availablethrough May 2024, pursuant to an option to extend, and may extend its credit facility for borrowing needs until May 2023one additional year with the lenders' approval. SCE borrowed $750 million under a term loan in February 2019 and contains two 1-year extension options. In March and June 2018, SCE issued $1.25$1.1 billion and $650 million, respectively, of first and refunding mortgage bonds.bonds in March 2019. The proceeds from these bondsthe term loan and the March 2019 bond issuances were used to repay commercial paper borrowings and for general corporate purposes. For further details, see "Notes to Consolidated Financial Statements—Note 5. Debt and Credit Agreements.Equity Financing."

SCE may finance balancing account undercollections and working capital requirements to support operations and capital expenditures with commercial paper, its credit facility or other borrowings, subject to availability in the bank and capital markets. As necessary, SCE will utilize its available liquidity, capital market financings, of debt and preferred equityother borrowings or parent company contributions to SCE equity in order to meet its obligations as they become due, including any potential costs related to the December 2017 Wildfires and Montecito Mudslides (see2017/2018 Wildfire/Mudslide Events. For further information, see "Management Overview—Southern California Wildfires"Wildfires and "—Montecito Mudslides" for further information).Mudslides."

A debt covenant in SCE's credit facility limits its debt to total capitalization ratio to less than or equal to 0.65 to 1. At June 30, 2018,2019, SCE's debt to total capitalization ratio was 0.460.48 to 1.

At June 30, 2018,2019, SCE was in compliance with all other financial covenants that affect access to capital.

The Alberhill System Project would consist of constructing a new 500-kV substation, two 500-kV transmission lines to connect the proposed substation to the existing Serrano-Valley 500-kV transmission line, telecommunication equipment and subtransmission lines in unincorporated and incorporated portions of western Riverside County. The Project was designed to meet long-term forecasted electrical demand in the proposed Alberhill System Project area and to increase electrical system reliability. In April 2018, the CPUC issued a proposed decision and in July the CPUC issued2019, SCE filed an alternate proposed decision, both denying SCE's requestamended application for a certificate of public convenience and necessity based on the presiding administrative law judge's conclusion that the Alberhill System Project is not needed. The alternate proposed decision would deny the Alberhill System Project without prejudice, such that SCE may re-submit an application if new or updated information demonstrates a need for the project. SCE continues to believe the Alberhill System Project is needed to serve forecasted local area demand and to increase operating flexibility. SCE has filed comments on both the proposed decision and alternate proposed decision requesting thatwith the CPUC, grant the certificatewhich included total project costs of public convenience and necessity for the Alberhill System Project. A final CPUC decision is anticipated in 2018. SCE is unable to predict the outcome$257 million, an increase of this matter.

Riverside Transmission Reliability Project

The Riverside Transmission Reliability Project is a joint project between SCE and Riverside Public Utilities (RPU), the municipal utility department of the City of Riverside. While RPU would be responsible for constructing some of the Project's facilities within Riverside, SCE's portion of the Project consists of constructing upgrades to its system, including a new 230-kV Substation; certain interconnection and telecommunication facilities and transmission lines in the cities of Riverside, Jurupa Valley and Norco and in portions of unincorporated Riverside County. The purpose of the Project is to provide RPU and its customers with adequate transmission capacity to serve existing and projected load, to provide long-term system capacity for load growth, and to provide needed system reliability. Due to changed circumstances since the time the Project was originally developed, SCE informed the CPUC in August 2016 that it supports revisions to the proposed Project. In AprilOctober 2018, the CPUC issued a subsequentan environmental impact report which includedthat identified a new route alternative, different from SCE'sSCE’s proposed and preferred project, as the environmentally preferred project and proposed an additional underground section of the proposed 220-kV power line.  In June 2019, SCE filed testimony with the CPUC that increased SCE's preferred project cost estimate to $451 million and updated the in-service date to 2024. This is an increase of $10 million and an extension of one year as compared to the previous estimate.

Net cash provided by operating activities was impacted by the following:

Net income and non-cash items decreased in 20182019 by $75$153 million primarily due to higher operationthe adoption of the 2018 GRC final decision in the second quarter of 2019, the timing of regulatory deferral and maintenance expenses related tocost recovery of wildfire insurance costs and higher net financing costs,revenue due to a change in estimate under the FERC formula rate mechanism, partially offset by higher revenue. Revenue increasedwildfire mitigation costs in 2019. Non-cash items included changes in deferred income taxes and investment credits of $(175) million and $12 million in 2019 and 2018, due to a refund to customers for prior overcollectionsrespectively, depreciation and amortization of $834 million and $1.1 billion in 2019 and 2018, respectively, and an impairment charge of $170 million recorded in 2017. In the first half of2019 related to disallowed historical capital expenditures in SCE's 2018 operation and maintenance expenses were also higher due to increased line clearing activity.GRC final decision.

Net cash for working capital was $(507)$(235) million and $(237)$(507) million during the six months ended June 30, 2019 and 2018, and 2017, respectively. Net cash for working capital in 2019 was primarily impacted by insurance premium payments of $431 million for wildfire-related coverage. The net cash for each period was primarily related toalso impacted by the reductionstiming of payables (including payments for payroll-related costs and purchased power)disbursements of $50$170 million and $55$(55) million during the first six months of 20182019 and 2017,2018, respectively, and an increase in receivables from customers of $149 million and $499 million in 2019 and $147 million in 2018, and 2017, respectively.

Net cash provided by regulatory assets and liabilities, including changes in over (under) collectionsovercollections of balancing accounts was $204$(543) million and $39$204 million during the six months ended June 30, 20182019 and 2017,2018, respectively. SCE has a number of balancing accounts, which impact cash flows based on differences between timing of collection of amounts through rates and accrual expenditures. Cash flows were primarily impacted by the following:

2018

The following table summarizes cash provided by financing activities for the six months ended June 30, 20182019 and 2017.2018. Issuances of debt are discussed in "Notes to Consolidated Financial Statements—Note 5. Debt and Credit Agreements—Long-Term Debt.Agreements."

Cash flows used in investing activities are primarily due to capital expenditures related to transmission and distribution investments ($2.12.2 billion and $1.7$2.1 billion for the six monthssix-month periods ended June 30, 20182019 and 2017,2018, respectively). In addition, SCE had a net redemption of nuclear decommissioning trust investments of $72 million and $73 million during each of the first six months ended June 30, 2019 and 2018, and 2017.respectively. See "Nuclear Decommissioning Activities" below for further discussion.

SCE's statement of cash flows includes nuclear decommissioning activities, which are reflected in the following line items:

Net cash used in operating activities relates to interest and dividends less administrative expenses, taxes, and SCE's decommissioning costs. See "Notes to Consolidated Financial Statements—Note 10. Investments" for further information. Investing activities represent the purchase and sale of investments within the nuclear decommissioning trusts, including the reinvestment of earnings from nuclear decommissioning trust investments. The net cash impact reflects timing of decommissioning payments ($7198 million and $98$71 million in 20182019 and 2017,2018, respectively) and reimbursements to SCE from the nuclear decommissioning trust ($78109 million and $99$78 million in 20182019 and 2017,2018, respectively).