SOUTHERN CALIFORNIA EDISON (SCE-PN) 10-Q 2 May 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 28, 2016
Entity Information [Line Items]
Entity Registrant Name	EDISON INTERNATIONAL
Entity Central Index Key	827,052
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		325,811,206
Southern California Edison
Entity Information [Line Items]
Entity Registrant Name	SOUTHERN CALIFORNIA EDISON CO
Entity Central Index Key	92,103
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		434,888,104

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Total operating revenue	$ 2,440	$ 2,512
Purchased power and fuel	794	786
Operation and maintenance	629	636
Depreciation, decommissioning and amortization	477	463
Property and other taxes	92	89
Total operating expenses	1,992	1,974
Operating income	448	538
Interest and other income	31	39
Interest expense	(140)	(143)
Other expenses	(6)	(10)
Income from continuing operations before income taxes	333	424
Income tax expense	38	106
Income from continuing operations	295	318
Income from discontinued operations, net of tax	1	0
Net income	296	318
Preferred and preference stock dividend requirements of SCE	30	28
Other noncontrolling interests	(5)	(9)
Net income attributable to common shareholders	271	299
Amounts attributable to Edison International common shareholders:
Income from continuing operations, net of tax	270	299
Income from discontinued operations, net of tax	1	0
Net income attributable to common shareholders	$ 271	$ 299
Basic earnings per common share attributable to Edison International common shareholders:
Weighted-average shares of common stock outstanding (in shares)	326	326
Continuing operations (in dollars per share)	$ 0.83	$ 0.92
Total (in dollars per share)	$ 0.83	$ 0.92
Diluted earnings per common share attributable to Edison International common shareholders:
Weighted-average shares of common stock outstanding, including effect of dilutive securities (in shares)	328	329
Continuing operations (in dollars per share)	$ 0.82	$ 0.91
Total (in dollars per share)	0.82	0.91
Dividends declared per common share (in dollars per share)	$ 0.4800	$ 0.4175
Southern California Edison
Total operating revenue	$ 2,435	$ 2,508
Purchased power and fuel	794	786
Operation and maintenance	603	621
Depreciation, decommissioning and amortization	475	463
Property and other taxes	91	88
Total operating expenses	1,963	1,958
Operating income	472	550
Interest and other income	31	33
Interest expense	(131)	(136)
Other expenses	(5)	(7)
Income from continuing operations before income taxes	367	440
Income tax expense	50	107
Income from continuing operations	317	333
Net income	317	333
Preferred and preference stock dividend requirements of SCE	30	28
Net income attributable to common shareholders	287	305
Amounts attributable to Edison International common shareholders:
Net income attributable to common shareholders	$ 287	$ 305

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net income	$ 296	$ 318
Pension and postretirement benefits other than pensions:
Net gain (loss) arising during the period plus amortization included in net income	2	(1)
Other comprehensive income (loss), net of tax	2	(1)
Comprehensive income	298	317
Less: Comprehensive income attributable to noncontrolling interests	25	19
Comprehensive income attributable to Edison International	273	298
Southern California Edison
Net income	317	333
Pension and postretirement benefits other than pensions:
Net gain (loss) arising during the period plus amortization included in net income	1	1
Other comprehensive income (loss), net of tax	1	1
Comprehensive income	$ 318	$ 334

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Assets [Abstract]
Cash and cash equivalents	$ 137	$ 161
Receivables, less allowances for uncollectible accounts	649	771
Accrued unbilled revenue	512	565
Inventory	268	267
Derivative assets	65	79
Regulatory assets	538	560
Other current assets	258	251
Total current assets	2,427	2,654
Nuclear decommissioning trusts	4,290	4,331
Other investments	208	203
Total investments	4,498	4,534
Utility property, plant and equipment, less accumulated depreciation and amortization	35,323	34,945
Nonutility property, plant and equipment, less accumulated depreciation	141	140
Total property, plant and equipment	35,464	35,085
Derivative assets	78	84
Regulatory assets	7,628	7,512
Other long-term assets	364	360
Total long-term assets	8,070	7,956
Total assets	50,459	50,229
LIABILITIES AND EQUITY
Short-term debt	363	695
Current portion of long-term debt	295	295
Accounts payable	938	1,310
Accrued taxes	139	72
Customer deposits	253	242
Derivative liabilities	232	218
Regulatory liabilities	1,157	1,128
Other current liabilities	856	967
Total current liabilities	4,233	4,927
Long-term debt	11,243	10,883
Deferred income taxes and credits	7,699	7,480
Derivative liabilities	1,136	1,100
Pensions and benefits	1,771	1,759
Asset retirement obligations	2,597	2,764
Regulatory liabilities	5,920	5,676
Other deferred credits and other long-term liabilities	2,225	2,246
Total deferred credits and other liabilities	21,348	21,025
Total liabilities	$ 36,824	$ 36,835
Commitments and contingencies (Note 11)
Redeemable noncontrolling interest	$ 4	$ 6
Common stock, no par value	2,491	2,484
Accumulated other comprehensive loss	(54)	(56)
Retained earnings	9,002	8,940
Total common shareholders' equity	11,439	11,368
Noncontrolling interests – preferred and preference stock of SCE	2,192	2,020
Total equity	13,631	13,388
Total liabilities and equity	50,459	50,229
Southern California Edison
Assets [Abstract]
Cash and cash equivalents	21	26
Receivables, less allowances for uncollectible accounts	624	724
Accrued unbilled revenue	511	564
Inventory	251	256
Derivative assets	65	79
Regulatory assets	538	560
Other current assets	233	234
Total current assets	2,243	2,443
Nuclear decommissioning trusts	4,290	4,331
Other investments	173	168
Total investments	4,463	4,499
Utility property, plant and equipment, less accumulated depreciation and amortization	35,323	34,945
Nonutility property, plant and equipment, less accumulated depreciation	73	73
Total property, plant and equipment	35,396	35,018
Derivative assets	78	84
Regulatory assets	7,628	7,512
Other long-term assets	239	239
Total long-term assets	7,945	7,835
Total assets	50,047	49,795
LIABILITIES AND EQUITY
Short-term debt	101	49
Current portion of long-term debt	79	79
Accounts payable	935	1,299
Accrued taxes	105	46
Customer deposits	253	242
Derivative liabilities	232	218
Regulatory liabilities	1,157	1,128
Other current liabilities	662	760
Total current liabilities	3,524	3,821
Long-term debt	10,422	10,460
Deferred income taxes and credits	9,297	9,073
Derivative liabilities	1,134	1,100
Pensions and benefits	1,292	1,284
Asset retirement obligations	2,595	2,762
Regulatory liabilities	5,920	5,676
Other deferred credits and other long-term liabilities	1,934	1,947
Total deferred credits and other liabilities	22,172	21,842
Total liabilities	$ 36,118	$ 36,123
Commitments and contingencies (Note 11)
Common stock, no par value	$ 2,168	$ 2,168
Additional paid-in capital	653	652
Accumulated other comprehensive loss	(21)	(22)
Retained earnings	8,884	8,804
Total common shareholders' equity	11,684	11,602
Noncontrolling interests – preferred and preference stock of SCE	2,245	2,070
Total equity	13,929	13,672
Total liabilities and equity	$ 50,047	$ 49,795

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Receivables, allowances for uncollectible accounts (in dollars)	$ 59	$ 62
Utility property, plant and equipment, accumulated depreciation (in dollars)	8,751	8,548
Nonutility property, plant and equipment, accumulated depreciation (in dollars)	$ 88	$ 85
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized	800,000,000	800,000,000
Common stock, shares issued	325,811,206	325,811,206
Common stock, shares outstanding	325,811,206	325,811,206
Southern California Edison
Receivables, allowances for uncollectible accounts (in dollars)	$ 59	$ 62
Utility property, plant and equipment, accumulated depreciation (in dollars)	8,751	8,548
Nonutility property, plant and equipment, accumulated depreciation (in dollars)	$ 83	$ 81
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized	560,000,000	560,000,000
Common stock, shares issued	434,888,104	434,888,104
Common stock, shares outstanding	434,888,104	434,888,104

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 296	$ 318
Less: Income from discontinued operations	1	0
Income from continuing operations	295	318
Adjustments to reconcile to net cash provided by operating activities:
Depreciation, decommissioning and amortization	499	485
Allowance for equity during construction	(22)	(21)
Deferred income taxes and investment tax credits	35	72
Other	5	5
Nuclear decommissioning trusts	(106)	29
Changes in operating assets and liabilities:
Receivables	117	31
Inventory	(1)	(10)
Accounts payable	(184)	63
Prepaid and accrued taxes	66	38
Other current assets and liabilities	(43)	(229)
Derivative assets and liabilities, net	5	(10)
Regulatory assets and liabilities, net	119	193
Other noncurrent assets and liabilities	68	0
Net cash provided by operating activities	853	964
Cash flows from financing activities:
Long-term debt issued, net of discount and issuance costs	397	1,287
Long-term debt matured	(40)	(419)
Preference stock issued, net	294	0
Preference stock redeemed	(125)	0
Short-term debt financing, net	(332)	(355)
Dividends to noncontrolling interests	(35)	(34)
Dividends paid	(156)	(136)
Other	(46)	(30)
Net cash (used in) provided by financing activities	(43)	313
Cash flows from investing activities:
Capital expenditures	(951)	(1,268)
Proceeds from sale of nuclear decommissioning trust investments	793	1,026
Purchases of nuclear decommissioning trust investments	(687)	(1,062)
Other	11	10
Net cash used in investing activities	(834)	(1,294)
Net decrease in cash and cash equivalents	(24)	(17)
Cash and cash equivalents at beginning of period	161	132
Cash and cash equivalents at end of period	137	115
Southern California Edison
Cash flows from operating activities:
Net income	317	333
Income from continuing operations	317	333
Adjustments to reconcile to net cash provided by operating activities:
Depreciation, decommissioning and amortization	496	483
Allowance for equity during construction	(22)	(21)
Deferred income taxes and investment tax credits	60	67
Other	3	3
Nuclear decommissioning trusts	(106)	29
Changes in operating assets and liabilities:
Receivables	100	18
Inventory	5	(7)
Accounts payable	(175)	52
Prepaid and accrued taxes	60	43
Other current assets and liabilities	(25)	(205)
Derivative assets and liabilities, net	5	(10)
Regulatory assets and liabilities, net	119	193
Other noncurrent assets and liabilities	45	(12)
Net cash provided by operating activities	882	966
Cash flows from financing activities:
Long-term debt issued, net of discount and issuance costs	0	1,287
Long-term debt matured	(40)	(419)
Preference stock issued, net	294	0
Preference stock redeemed	(125)	0
Short-term debt financing, net	52	(370)
Dividends paid	(205)	(181)
Other	(31)	3
Net cash (used in) provided by financing activities	(55)	320
Cash flows from investing activities:
Capital expenditures	(950)	(1,266)
Proceeds from sale of nuclear decommissioning trust investments	793	1,026
Purchases of nuclear decommissioning trust investments	(687)	(1,062)
Other	12	14
Net cash used in investing activities	(832)	(1,288)
Net decrease in cash and cash equivalents	(5)	(2)
Cash and cash equivalents at beginning of period	26	38
Cash and cash equivalents at end of period	$ 21	$ 36

Consolidated Statements of Cas7

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Premiums Discounts and Issuance Costs of Long Term Debt	$ 3	$ 13
Southern California Edison
Premiums Discounts and Issuance Costs of Long Term Debt	$ 0	$ 13

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Organization and Basis of Presentation Edison International is the parent holding company of Southern California Edison Company ("SCE"). SCE is an investor-owned public utility primarily engaged in the business of supplying and delivering electricity to an approximately 50,000 square mile area of southern California. Edison International is also the parent company of Edison Energy Group, a company that holds interests in subsidiaries that are engaged in competitive businesses focused on providing energy services to commercial and industrial customers, including distributed resources, engaging in competitive transmission opportunities, and exploring distributed water treatment and recycling. Such competitive business activities are currently not material to report as a separate business segment. These combined notes to the consolidated financial statements apply to both Edison International and SCE unless otherwise described. Edison International's consolidated financial statements include the accounts of Edison International, SCE and other wholly owned and controlled subsidiaries. References to Edison International refer to the consolidated group of Edison International and its subsidiaries. References to Edison International Parent and Other refer to Edison International Parent and its nonutility subsidiaries. SCE's consolidated financial statements include the accounts of SCE and its wholly owned and controlled subsidiaries. All intercompany transactions have been eliminated from the consolidated financial statements. Edison International's and SCE's significant accounting policies were described in Note 1 of "Notes to Consolidated Financial Statements" included in the 2015 Form 10-K. This quarterly report should be read in conjunction with the financial statements and notes included in the 2015 Form 10-K. In the opinion of management, all adjustments, consisting of recurring accruals, have been made that are necessary to fairly state the consolidated financial position, results of operations and cash flows in accordance with accounting principles generally accepted in the United States of America for the periods covered by this quarterly report on Form 10-Q. The results of operations for the three-month period ended March 31, 2016 are not necessarily indicative of the operating results for the full year. The December 31, 2015 financial statement data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America. Certain prior year amounts have been reclassified for consistency with the current period presentation. Cash Equivalents Cash equivalents included investments in money market funds. Generally, the carrying value of cash equivalents equals the fair value, as these investments have original maturities of three months or less. The cash equivalents were as follows: Edison International SCE (in millions) March 31, December 31, 2015 March 31, December 31, 2015 Money market funds $ 36 $ 37 $ 7 $ 8 Cash is temporarily invested until required for check clearing. Checks issued, but not yet paid by the financial institution, are reclassified from cash to accounts payable at the end of each reporting period as follows: Edison International SCE (in millions) March 31, December 31, 2015 March 31, December 31, 2015 Book balances reclassified to accounts payable $ 102 $ 162 $ 102 $ 158 Inventory Inventory is primarily composed of materials, supplies and spare parts, and stated at the lower of cost or market, cost being determined by the average cost method. Revenue Recognition Operating revenue is recognized when electricity is delivered and includes amounts for services rendered but unbilled at the end of each reporting period. During the first quarter of 2015, SCE recognized revenue from CPUC activities largely based on 2014 authorized base revenue requirements included in customer rates. In the fourth quarter of 2015, SCE implemented its 2015 GRC decision which allowed SCE to recover its revenue requirement retroactive to January 1, 2015. Earnings Per Share Edison International computes earnings per common share ("EPS") using the two-class method, which is an earnings allocation formula that determines EPS for each class of common stock and participating security. Edison International's participating securities are stock-based compensation awards payable in common shares, including performance shares and restricted stock units, which earn dividend equivalents on an equal basis with common shares once the awards are vested. EPS attributable to Edison International common shareholders was computed as follows: Three months ended March 31, (in millions, except per-share amounts) 2016 2015 Basic earnings per share – continuing operations: Income from continuing operations attributable to common shareholders $ 270 $ 299 Participating securities dividends — — Income from continuing operations available to common shareholders $ 270 $ 299 Weighted average common shares outstanding 326 326 Basic earnings per share – continuing operations $ 0.83 $ 0.92 Diluted earnings per share – continuing operations: Income from continuing operations available to common shareholders $ 270 $ 299 Income impact of assumed conversions — — Income from continuing operations available to common shareholders and assumed conversions $ 270 $ 299 Weighted average common shares outstanding 326 326 Incremental shares from assumed conversions 2 3 Adjusted weighted average shares – diluted 328 329 Diluted earnings per share – continuing operations $ 0.82 $ 0.91 In addition to the participating securities discussed above, Edison International also may award stock options which are payable in common shares and are included in the diluted earnings per share calculation. Stock option awards to purchase 2,023,787 and 79,394 shares of common stock for the three months ended March 31, 2016 and 2015 , respectively, were outstanding, but were not included in the computation of diluted earnings per share because the exercise price of the awards was greater than the average market price of the common shares during the respective periods and, therefore, the effect would have been antidilutive. New Accounting Guidance Accounting Guidance Adopted On April 7, 2015, the FASB issued an accounting standards update that requires debt issuance costs to be presented in the balance sheet as a direct deduction from the carrying amount of the related debt liability, consistent with debt discounts. Previously, accounting guidance required these costs to be presented as a deferred charge asset. Edison International and SCE adopted this guidance in the first quarter of 2016. At March 31, 2016, the amount of debt issuance costs that are reflected as a deduction of "Long-term debt" was $76 million for SCE and $83 million for Edison International. At December 31, 2015 the amount of debt issuance costs that have been reclassified from "Other long-term assets" to a deduction of "Long-term debt" was $77 million for SCE and $81 million for Edison International. On April 15, 2015, the FASB issued an accounting standards update on fees paid by a customer for software licenses. This new standard provides guidance about whether a cloud computing arrangement includes a software license which may be capitalized in certain circumstances. If a cloud computing arrangement does not include a software license, then the arrangement should be accounted for as a service contract. Edison International and SCE adopted this guidance prospectively, effective January 1, 2016. The adoption of this standard did not have a material impact on Edison International's and SCE's consolidated financial statements. Accounting Guidance Not Yet Adopted On May 28, 2014, the FASB issued an accounting standards update on revenue recognition including enhanced disclosures and further amended the standard in 2016. Under the new standard, revenue is recognized when (or as) a good or service is transferred to the customer and the customer obtains control of the good or service. On July 9, 2015, the FASB approved a one-year deferral, updating the effective date to January 1, 2018. Edison International and SCE are currently evaluating this new guidance and cannot determine the impact of this standard at this time. Edison International and SCE anticipates adopting the standard using the modified retrospective application which means that we would recognize the cumulative effect of initially applying the revenue standard as an adjustment to the opening balance of retained earnings in 2018. On January 5, 2016, the FASB issued an accounting standards update that amends the guidance on the classification and measurement of financial instruments. The amendments require equity investments (excluding those accounted for under the equity method or those that result in consolidation) to be measured at fair value, with changes in fair value recognized in net income. It also amends certain disclosure requirements associated with the fair value of financial instruments. In addition, the new guidance requires financial assets and financial liabilities to be presented separately in the notes to the financial statements, grouped by measurement category and form of financial asset. Edison International and SCE will adopt this guidance effective January 1, 2018. The adoption of this standard is not expected to have a material impact on Edison International's and SCE's consolidated financial statements. On February 25, 2016, the FASB issued an accounting standards update related to lease accounting including enhanced disclosures. Under the new standard, a lease is defined as a contract, or part of a contract, that conveys the right to control the use of identified assets for a period of time in exchange for consideration. Lessees will classify leases with a term of more than one year as either operating or finance leases and will need to recognize a right-of-use asset and a lease liability. The liability will be equal to the present value of lease payments. The asset will be based on the liability, subject to adjustment, such as for initial direct costs. Operating leases will result in straight-line expense while finance leases will result in a front-loaded expense pattern. This guidance is effective January 1, 2019 but early adoption is permitted. Edison International and SCE are currently evaluating this new guidance and cannot determine the impact of this standard at this time. On March 30, 2016, the FASB issued an accounting standards update to simplify the accounting for share-based payments. Under this new guidance, the tax effects related to share based payments will be recorded through the income statement. Currently, tax benefits in excess of compensation cost ("windfalls") are recorded in equity, and tax deficiencies ("shortfalls") are recorded in equity to the extent of previous windfalls, and then to the income statement. This guidance is effective January 1, 2017 but early adoption is permitted. The new standard also revised reporting on the statement of cash flows. Edison International and SCE are currently evaluating this new guidance.

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity	3 Months Ended
	Mar. 31, 2016
Statement of Stockholders' Equity [Abstract]
Consolidated Statements of Changes in Equity	Consolidated Statements of Changes in Equity The following table provides Edison International's changes in equity for the three months ended March 31, 2016 : Equity Attributable to Common Shareholders Noncontrolling Interests (in millions, except per-share amounts) Common Stock Accumulated Retained Earnings Subtotal Preferred and Preference Stock Total Equity Balance at December 31, 2015 $ 2,484 $ (56 ) $ 8,940 $ 11,368 $ 2,020 $ 13,388 Net income — — 271 271 30 301 Other comprehensive income — 2 — 2 — 2 Common stock dividends declared ($0.48 per share) — — (156 ) (156 ) — (156 ) Dividends to noncontrolling interests — — — — (30 ) (30 ) Stock-based compensation 1 — (50 ) (49 ) — (49 ) Non-cash stock-based compensation 6 — — 6 — 6 Issuance of preference stock — — — — 294 294 Redemption of preference stock — — (3 ) (3 ) (122 ) (125 ) Balance at March 31, 2016 $ 2,491 $ (54 ) $ 9,002 $ 11,439 $ 2,192 $ 13,631 The following table provides Edison International's changes in equity for the three months ended March 31, 2015 : Equity Attributable to Common Shareholders Noncontrolling Interests (in millions, except per-share amounts) Common Stock Accumulated Retained Earnings Subtotal Preferred and Preference Stock Total Equity Balance at December 31, 2014 $ 2,445 $ (58 ) $ 8,573 $ 10,960 $ 2,022 $ 12,982 Net income — — 299 299 28 327 Other comprehensive loss — (1 ) — (1 ) — (1 ) Common stock dividends declared ($0.4175 per share) — — (136 ) (136 ) — (136 ) Dividends to noncontrolling interests — — — — (28 ) (28 ) Stock-based compensation 9 — (61 ) (52 ) — (52 ) Non-cash stock-based compensation 6 — — 6 — 6 Balance at March 31, 2015 $ 2,460 $ (59 ) $ 8,675 $ 11,076 $ 2,022 $ 13,098 The following table provides SCE's changes in equity for the three months ended March 31, 2016 : Equity Attributable to Edison International (in millions) Common Additional Accumulated Retained Preferred Total Balance at December 31, 2015 $ 2,168 $ 652 $ (22 ) $ 8,804 $ 2,070 $ 13,672 Net income — — — 317 — 317 Other comprehensive income — — 1 — — 1 Dividends declared on common stock — — — (170 ) — (170 ) Dividends declared on preferred and preference stock — — — (30 ) — (30 ) Stock-based compensation — 1 — (34 ) — (33 ) Non-cash stock-based compensation — 3 — — — 3 Issuance of preference stock — (6 ) — — 300 294 Redemption of preference stock — 3 — (3 ) (125 ) (125 ) Balance at March 31, 2016 $ 2,168 $ 653 $ (21 ) $ 8,884 $ 2,245 $ 13,929 The following table provides SCE's changes in equity for the three months ended March 31, 2015 : Equity Attributable to Edison International (in millions) Common Additional Accumulated Retained Preferred Total Balance at December 31, 2014 $ 2,168 $ 618 $ (28 ) $ 8,454 $ 2,070 $ 13,282 Net income — — — 333 — 333 Other comprehensive income — — 1 — — 1 Dividends declared on common stock — — — (147 ) — (147 ) Dividends declared on preferred and preference stock — — — (28 ) — (28 ) Stock-based compensation — 9 — (22 ) — (13 ) Non-cash stock-based compensation — 4 — — — 4 Balance at March 31, 2015 $ 2,168 $ 631 $ (27 ) $ 8,590 $ 2,070 $ 13,432

Variable Interest Entities

Variable Interest Entities	3 Months Ended
	Mar. 31, 2016
Variable Interest Entities Disclosure [Abstract]
Variable Interest Entities	Variable Interest Entities A VIE is defined as a legal entity that meets one of two conditions: (1) the equity owners do not have sufficient equity at risk, or (2) the holders of the equity investment at risk, as a group, lack any of the following three characteristics: decision-making rights, the obligation to absorb losses, or the right to receive the expected residual returns of the entity. The primary beneficiary is identified as the variable interest holder that has both the power to direct the activities of the VIE that most significantly impact the entity's economic performance and the obligation to absorb losses or the right to receive benefits from the entity that could potentially be significant to the VIE. The primary beneficiary is required to consolidate the VIE. A subsidiary of Edison International is the primary beneficiary of an entity that owns rooftop solar projects. Commercial and operating activities are generally the factors that most significantly impact the economic performance of such VIEs. Commercial and operating activities include construction, operation and maintenance, fuel procurement, dispatch and compliance with regulatory and contractual requirements. Variable Interest in VIEs that are not Consolidated Power Purchase Contracts SCE has power purchase agreements ("PPAs") that are classified as variable interests in VIEs, including tolling agreements through which SCE provides the natural gas to fuel the plants and contracts with qualifying facilities ("QFs") that contain variable pricing provisions based on the price of natural gas. SCE has concluded that it is not the primary beneficiary of these VIEs since it does not control the commercial and operating activities of these entities. Since payments for capacity are the primary source of income, the most significant economic activity for these VIEs is the operation and maintenance of the power plants. As of the balance sheet date, the carrying amount of assets and liabilities in SCE's consolidated balance sheet that relate to its involvement with VIEs result from amounts due under the PPAs or the fair value of those derivative contracts. Under these contracts, SCE recovers the costs incurred through demonstration of compliance with its CPUC-approved long-term power procurement plans. SCE has no residual interest in the entities and has not provided or guaranteed any debt or equity support, liquidity arrangements, performance guarantees or other commitments associated with these contracts other than the purchase commitments described in Note 11 of the 2015 Form 10-K. As a result, there is no significant potential exposure to loss to SCE from its variable interest in these VIEs. The aggregate contracted capacity dedicated to SCE from these VIE projects was 4,383 MW and 4,125 MW at March 31, 2016 and 2015 , respectively, and the amounts that SCE paid to these projects were $127 million and $103 million for the three months ended March 31, 2016 and 2015 , respectively. These amounts are recoverable in customer rates, subject to reasonableness review. Unconsolidated Trusts of SCE SCE Trust I, Trust II, Trust III, Trust IV, and Trust V were formed in 2012, 2013, 2014, 2015 and 2016, respectively, for the exclusive purpose of issuing the 5.625% , 5.10% , 5.75% , 5.375% and 5.45% trust preference securities, respectively ("trust securities"). The trusts are VIEs. SCE has concluded that it is not the primary beneficiary of these VIEs as it does not have the obligation to absorb the expected losses or the right to receive the expected residual returns of the trusts. SCE Trust I, Trust II, Trust III, Trust IV and Trust V issued to the public trust securities in the face amounts of $475 million , $400 million , $275 million , $325 million , and $300 million respectively, (cumulative, liquidation amounts of $25 per share) and $10,000 of common stock each to SCE. The trusts invested the proceeds of these trust securities in Series F, Series G, Series H, Series J, and Series K Preference Stock issued by SCE in the principal amounts of $475 million , $400 million , $275 million , $325 million and $300 million (cumulative, $2,500 per share liquidation values), respectively, which have substantially the same payment terms as the respective trust securities. The Series F, Series G, Series H, Series J and Series K Preference Stock and the corresponding trust securities do not have a maturity date. Upon any redemption of any shares of the Series F, Series G, Series H, Series J or Series K Preference Stock, a corresponding dollar amount of trust securities will be redeemed by the applicable trust (see Note 12 for further information). The applicable trust will make distributions at the same rate and on the same dates on the applicable series of trust securities when and if the SCE board of directors declares and makes dividend payments on the related Preference Stock. The applicable trust will use any dividends it receives on the related Preference Stock to make its corresponding distributions on the applicable series of trust securities. If SCE does not make a dividend payment to any of these trusts, SCE would be prohibited from paying dividends on its common stock. SCE has fully and unconditionally guaranteed the payment of the trust securities and trust distributions, if and when SCE pays dividends on the related Preference Stock. The Trust I, Trust II, Trust III and Trust IV balance sheets as of March 31, 2016 and December 31, 2015 , consisted of investments of $475 million , $400 million , $275 million and $325 million in the Series F, Series G, Series H and Series J Preference Stock, respectively, $475 million , $400 million , $275 million and $325 million of trust securities, respectively, and $10,000 each of common stock. The Trust V balance sheet as of March 31, 2016 consisted of investments of $300 million in the Series K Preference Stock, $300 million of trust securities, and $10,000 of common stock. The following table provides a summary of the trusts' income statements: Three months ended March 31, (in millions) Trust I Trust II Trust III Trust IV Trust V 2016 Dividend income $ 7 $ 5 $ 4 $ 4 $ 1 Dividend distributions 7 5 4 4 1 2015 Dividend income $ 7 $ 5 $ 4 * * Dividend distributions 7 5 4 * * * Not applicable.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Recurring Fair Value Measurements Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (referred to as an "exit price"). Fair value of an asset or liability considers assumptions that market participants would use in pricing the asset or liability, including assumptions about nonperformance risk. As of March 31, 2016 and December 31, 2015 , nonperformance risk was not material for Edison International and SCE. Assets and liabilities are categorized into a three-level fair value hierarchy based on valuation inputs used to determine fair value. Level 1 – The fair value of Edison International's and SCE's Level 1 assets and liabilities is determined using unadjusted quoted prices in active markets that are available at the measurement date for identical assets and liabilities. This level includes exchange-traded equity securities, U.S. treasury securities, mutual funds and money market funds. Level 2 – Edison International and SCE's Level 2 assets and liabilities include fixed income securities primarily consisting of U.S. government and agency bonds, municipal bonds and corporate bonds, and over-the-counter derivatives. The fair value of fixed income securities is determined using a market approach by obtaining quoted prices for similar assets and liabilities in active markets and inputs that are observable, either directly or indirectly, for substantially the full term of the instrument. The fair value of SCE's over-the-counter derivative contracts is determined using an income approach. SCE uses standard pricing models to determine the net present value of estimated future cash flows. Inputs to the pricing models include forward published or posted clearing prices from exchanges (New York Mercantile Exchange and Intercontinental Exchange) for similar instruments and discount rates. A primary price source that best represents trade activity for each market is used to develop observable forward market prices in determining the fair value of these positions. Broker quotes, prices from exchanges or comparison to executed trades are used to validate and corroborate the primary price source. These price quotations reflect mid-market prices (average of bid and ask) and are obtained from sources believed to provide the most liquid market for the commodity. Level 3 – The fair value of SCE's Level 3 assets and liabilities is determined using the income approach through various models and techniques that require significant unobservable inputs. This level includes over-the-counter options, tolling arrangements and derivative contracts that trade infrequently such as congestion revenue rights ("CRRs") and long-term power agreements. Edison International Parent and Other does not have any Level 3 assets and liabilities. Assumptions are made in order to value derivative contracts in which observable inputs are not available. Changes in fair value are based on changes to forward market prices, including extrapolation of short-term observable inputs into forecasted prices for illiquid forward periods. In circumstances where fair value cannot be verified with observable market transactions, it is possible that a different valuation model could produce a materially different estimate of fair value. Modeling methodologies, inputs and techniques are reviewed and assessed as markets continue to develop and more pricing information becomes available and the fair value is adjusted when it is concluded that a change in inputs or techniques would result in a new valuation that better reflects the fair value of those derivative contracts. See Note 6 for a discussion of fair value of derivative instruments. SCE The following table sets forth assets and liabilities of SCE that were accounted for at fair value by level within the fair value hierarchy: March 31, 2016 (in millions) Level 1 Level 2 Level 3 Netting and Collateral 1 Total Assets at fair value Derivative contracts $ — $ — $ 143 $ — $ 143 Other 28 — — — 28 Nuclear decommissioning trusts: Stocks 2 1,464 — — — 1,464 Fixed Income 3 907 1,810 — — 2,717 Short-term investments, primarily cash equivalents 69 48 — — 117 Subtotal of nuclear decommissioning trusts 4 2,440 1,858 — — 4,298 Total assets 2,468 1,858 143 — 4,469 Liabilities at fair value Derivative contracts — 21 1,356 (11 ) 1,366 Total liabilities — 21 1,356 (11 ) 1,366 Net assets (liabilities) $ 2,468 $ 1,837 $ (1,213 ) $ 11 $ 3,103 December 31, 2015 (in millions) Level 1 Level 2 Level 3 Netting and Collateral 1 Total Assets at fair value Derivative contracts $ — $ — $ 163 $ — $ 163 Other 28 — — — 28 Nuclear decommissioning trusts: Stocks 2 1,460 — — — 1,460 Fixed Income 3 947 1,776 — — 2,723 Short-term investments, primarily cash equivalents 91 81 — — 172 Subtotal of nuclear decommissioning trusts 4 2,498 1,857 — — 4,355 Total assets 2,526 1,857 163 — 4,546 Liabilities at fair value Derivative contracts — 22 1,311 (15 ) 1,318 Total liabilities — 22 1,311 (15 ) 1,318 Net assets (liabilities) $ 2,526 $ 1,835 $ (1,148 ) $ 15 $ 3,228 1 Represents the netting of assets and liabilities under master netting agreements and cash collateral across the levels of the fair value hierarchy. Netting among positions classified within the same level is included in that level. 2 Approximately 70% of SCE's equity investments were located in the United States at both March 31, 2016 and December 31, 2015 . 3 Includes corporate bonds, which were diversified and included collateralized mortgage obligations and other asset backed securities of $101 million and $111 million at March 31, 2016 and December 31, 2015 , respectively. 4 Excludes net payables of $8 million and net payables of $24 million at March 31, 2016 and December 31, 2015 , which consist of interest and dividend receivables as well as receivables and payables related to SCE's pending securities sales and purchases. Edison International Parent and Other Edison International Parent and Other assets measured at fair value consisted of money market funds of $ 30 million and $29 million at March 31, 2016 and December 31, 2015 , respectively, classified as Level 1. SCE Fair Value of Level 3 The following table sets forth a summary of changes in SCE's fair value of Level 3 net derivative assets and liabilities: Three months ended March 31, (in millions) 2016 2015 Fair value of net liabilities at beginning of period $ (1,148 ) $ (902 ) Total realized/unrealized gains (losses): Included in regulatory assets and liabilities 1 (65 ) (74 ) Fair value of net liabilities at end of period $ (1,213 ) $ (976 ) Change during the period in unrealized gains and losses related to assets and liabilities held at the end of the period $ (84 ) $ (96 ) 1 Due to regulatory mechanisms, SCE's realized and unrealized gains and losses are recorded as regulatory assets and liabilities. Edison International and SCE recognize the fair value for transfers in and transfers out of each level at the end of each reporting period. There were no significant transfers between any levels during 2016 and 2015 . Valuation Techniques Used to Determine Fair Value The process of determining fair value is the responsibility of SCE's risk management department, which reports to SCE's chief financial officer. This department obtains observable and unobservable inputs through broker quotes, exchanges and internal valuation techniques that use both standard and proprietary models to determine fair value. Each reporting period, the risk and finance departments collaborate to determine the appropriate fair value methodologies and classifications for each derivative. Inputs are validated for reasonableness by comparison against prior prices, other broker quotes and volatility fluctuation thresholds. Inputs used and valuations are reviewed period-over-period and compared with market conditions to determine reasonableness. The following table sets forth SCE's valuation techniques and significant unobservable inputs used to determine fair value for significant Level 3 assets and liabilities: Fair Value (in millions) Significant Range Assets Liabilities Valuation Technique(s) Unobservable Input (Weighted Average) Congestion revenue rights March 31, 2016 $ 136 $ — Market simulation model and auction prices Load forecast 6,289 MW - 24,349 MW Power prices 1 $0 - $110.44 Gas prices 2 $1.98 - $5.72 December 31, 2015 152 — Market simulation model and auction prices Load forecast 6,289 MW - 24,349 MW Power prices 1 $0 - $110.44 Gas prices 2 $1.98 - $5.72 Tolling March 31, 2016 7 1,329 Option model Volatility of gas prices 16% - 46% (30%) Volatility of power prices 26% - 86% (40%) Power prices $17.67 - $47.29 ($33.00) December 31, 2015 10 1,297 Option model Volatility of gas prices 15% - 58% (20%) Volatility of power prices 26% - 38% (30%) Power prices $24.15 - $46.93 ($34.80) 1 Prices are in dollars per megawatt-hour. 2 Prices are in dollars per million British thermal units. Level 3 Fair Value Sensitivity Congestion Revenue Rights For CRRs, where SCE is the buyer, generally increases (decreases) in forecasted load in isolation would result in increases (decreases) to the fair value. In general, an increase (decrease) in electricity and gas prices at illiquid locations tends to result in increases (decreases) to fair value; however, changes in electricity and gas prices in opposite directions may have varying results on fair value. Tolling Arrangements The fair values of SCE's tolling arrangements contain intrinsic value and time value. Intrinsic value is the difference between the market price and strike price of the underlying commodity. Time value is made up of several components, including volatility, time to expiration, and interest rates. The option model for tolling arrangements reflects plant specific information such as operating and start-up costs. For tolling arrangements where SCE is the buyer, increases in volatility of the underlying commodity prices would result in increases to fair value as it represents greater price movement risk. As power and gas prices increase, the fair value of tolling arrangements tends to increase. The valuation of tolling arrangements is also impacted by the correlation between gas and power prices. As the correlation increases, the fair value of tolling arrangements tends to decline. Nuclear Decommissioning Trusts SCE's nuclear decommissioning trust investments include equity securities, U.S. treasury securities and other fixed income securities. Equity and treasury securities are classified as Level 1 as fair value is determined by observable market prices in active or highly liquid and transparent markets. The remaining fixed income securities are classified as Level 2. The fair value of these financial instruments is based on evaluated prices that reflect significant observable market information such as reported trades, actual trade information of similar securities, benchmark yields, broker/dealer quotes, issuer spreads, bids, offers and relevant credit information. Fair Value of Debt Recorded at Carrying Value The carrying value and fair value of Edison International's and SCE's long-term debt (including current portion of long-term debt) are as follows: March 31, 2016 December 31, 2015 (in millions) Carrying Value Fair Value Carrying Value Fair Value SCE $ 10,501 $ 12,045 $ 10,616 $ 11,592 Edison International 11,538 13,109 11,259 12,252 The fair value of Edison International and SCE's short-term and long-term debt is classified as Level 2 and is based on evaluated prices that reflect significant observable market information such as reported trades, actual trade information of similar securities, benchmark yields, broker/dealer quotes of new issue prices and relevant credit information. The carrying value of Edison International's and SCE's trade receivables and payables, other investments, and short-term debt approximates fair value.

Debt and Credit Agreements

Debt and Credit Agreements	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Debt and Credit Agreements	Debt and Credit Agreements Long-Term Debt In March 2016, Edison International issued $400 million of 2.95% senior notes due in 2023. The proceeds from these bonds were used to repay commercial paper borrowings and for general corporate purposes. Credit Agreements and Short-Term Debt SCE and Edison International Parent have multi-year revolving credit facilities of $2.75 billion and $1.25 billion , respectively, with both maturing in July 2020. SCE's credit facility is generally used to support commercial paper borrowings and letters of credit issued for procurement-related collateral requirements, balancing account undercollections and for general corporate purposes, including working capital requirements to support operations and capital expenditures. Edison International Parent's credit facility is used to support commercial paper borrowings and for general corporate purposes. At March 31, 2016 , SCE's outstanding commercial paper was $101 million at a weighted-average interest rate of 0.45% . At March 31, 2016 , letters of credit issued under SCE's credit facility aggregated $94 million and are scheduled to expire in twelve months or less. At December 31, 2015 , the outstanding commercial paper was $ 49 million at a weighted-average interest rate of 0.51% . At March 31, 2016 , Edison International Parent's outstanding commercial paper was $262 million at a weighted-average interest rate of 0.69% . At December 31, 2015 , the outstanding commercial paper was $ 646 million at a weighted-average interest rate of 0.78% .

Derivative Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments Derivative financial instruments are used to manage exposure to commodity price risk. These risks are managed in part by entering into forward commodity transactions, including options, swaps and futures. To mitigate credit risk from counterparties in the event of nonperformance, master netting agreements are used whenever possible and counterparties may be required to pledge collateral depending on the creditworthiness of each counterparty and the risk associated with the transaction. Commodity Price Risk Commodity price risk represents the potential impact that can be caused by a change in the market value of a particular commodity. SCE's electricity price exposure arises from energy purchased from and sold to wholesale markets as a result of differences between SCE's load requirements and the amount of energy delivered from its generating facilities and power purchase agreements. SCE's natural gas price exposure arises from natural gas purchased for the Mountainview power plant and peaker plants, QF contracts where pricing is based on a monthly natural gas index and power purchase agreements in which SCE has agreed to provide the natural gas needed for generation, referred to as tolling arrangements. Credit and Default Risk Credit and default risk represent the potential impact that can be caused if a counterparty were to default on its contractual obligations and SCE would be exposed to spot markets for buying replacement power or selling excess power. In addition, SCE would be exposed to the risk of non-payment of accounts receivable, primarily related to the sales of excess power and realized gains on derivative instruments. Certain power contracts contain master netting agreements or similar agreements, which generally allow counterparties subject to the agreement to setoff amounts when certain criteria are met, such as in the event of default. The objective of netting is to reduce credit exposure. Additionally, to reduce SCE's risk exposures counterparties may be required to pledge collateral depending on the creditworthiness of each counterparty and the risk associated with the transaction. Certain power contracts contain a provision that requires SCE to maintain an investment grade rating from each of the major credit rating agencies, referred to as a credit-risk-related contingent feature. If SCE's credit rating were to fall below investment grade, SCE may be required to post additional collateral to cover derivative liabilities and the related outstanding payables. The net fair value of all derivative liabilities with these credit-risk-related contingent features was $50 million and $38 million as of March 31, 2016 and December 31, 2015 , respectively. SCE has posted $12 million collateral at March 31, 2016 and no collateral at December 31, 2015 to its counterparties at the respective dates for its derivative liabilities and related outstanding payables. If the credit-risk-related contingent features underlying these agreements were triggered on March 31, 2016 , SCE would be required to post $31 million of additional collateral of which $3 million is related to outstanding payables that are net of collateral already posted. Fair Value of Derivative Instruments SCE presents its derivative assets and liabilities on a net basis on its consolidated balance sheets when subject to master netting agreements or similar agreements. Derivative positions are offset against margin and cash collateral deposits. In addition, SCE has provided collateral in the form of letters of credit. Collateral requirements can vary depending upon the level of unsecured credit extended by counterparties, changes in market prices relative to contractual commitments and other factors. See Note 4 for a discussion of fair value of derivative instruments. The following table summarizes the gross and net fair values of SCE's commodity derivative instruments: March 31, 2016 Derivative Assets Derivative Liabilities Net (in millions) Short-Term Long-Term Subtotal Short-Term Long-Term Subtotal Commodity derivative contracts Gross amounts recognized $ 66 $ 78 $ 144 $ 244 $ 1,134 $ 1,378 $ 1,234 Gross amounts offset in the consolidated balance sheets (1 ) — (1 ) (1 ) — (1 ) — Cash collateral posted 1 — — — (11 ) — (11 ) (11 ) Net amounts presented in the consolidated balance sheets $ 65 $ 78 $ 143 $ 232 $ 1,134 $ 1,366 $ 1,223 December 31, 2015 Derivative Assets Derivative Liabilities Net (in millions) Short-Term Long-Term Subtotal Short-Term Long-Term Subtotal Commodity derivative contracts Gross amounts recognized $ 81 $ 84 $ 165 $ 235 $ 1,100 $ 1,335 $ 1,170 Gross amounts offset in the consolidated balance sheets (2 ) — (2 ) (2 ) — (2 ) — Cash collateral posted 1 — — — (15 ) — (15 ) (15 ) Net amounts presented in the consolidated balance sheets $ 79 $ 84 $ 163 $ 218 $ 1,100 $ 1,318 $ 1,155 1 In addition, at March 31, 2016 and December 31, 2015 , SCE had posted $25 million and $31 million , respectively, of collateral that is not offset against derivative liabilities and is reflected in "Other current assets" on the consolidated balance sheets. Income Statement Impact of Derivative Instruments SCE recognizes realized gains and losses on derivative instruments as purchased power expense and expects that such gains or losses will be part of the purchase power costs recovered from customers. As a result, realized gains and losses do not affect earnings, but may temporarily affect cash flows. Due to expected future recovery from customers, unrealized gains and losses are recorded as regulatory assets and liabilities and therefore also do not affect earnings. The remaining effects of derivative activities and related regulatory offsets are recorded in cash flows from operating activities in the consolidated statements of cash flows. The following table summarizes the components of SCE's economic hedging activity: Three months ended March 31, (in millions) 2016 2015 Realized losses $ (27 ) $ (36 ) Unrealized losses (64 ) (69 ) Notional Volumes of Derivative Instruments The following table summarizes the notional volumes of derivatives used for SCE hedging activities: Economic Hedges Commodity Unit of Measure March 31, 2016 December 31, 2015 Electricity options, swaps and forwards GWh 4,842 6,221 Natural gas options, swaps and forwards Bcf 17 32 Congestion revenue rights GWh 96,182 109,740 Tolling arrangements GWh 68,331 70,663

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Effective Tax Rate The table below provides a reconciliation of income tax expense computed at the federal statutory income tax rate to the income tax provision: Edison International SCE Three months ended March 31, (in millions) 2016 2015 2016 2015 Income from continuing operations before income taxes $ 333 $ 424 $ 367 $ 440 Provision for income tax at federal statutory rate of 35% 117 148 128 154 Increase in income tax from: State tax, net of federal benefit 6 11 9 14 Property-related (79 ) (60 ) (79 ) (60 ) Change related to uncertain tax positions (1 ) 15 (1 ) 10 Other (5 ) (8 ) (7 ) (11 ) Total income tax expense from continuing operations $ 38 $ 106 $ 50 $ 107 Effective tax rate 11.4 % 25.0 % 13.6 % 24.3 % The CPUC requires flow-through ratemaking treatment for the current tax benefit arising from certain property-related and other temporary differences which reverse over time. Flow-through items reduce current authorized revenue requirements in SCE's rate cases and result in a regulatory asset for recovery of deferred income taxes in future periods. The difference between the authorized amounts as determined in SCE's rate cases, adjusted for balancing and memorandum account activities, and the recorded flow-through items also result in increases or decreases in regulatory assets with a corresponding impact on the effective tax rate to the extent that recorded deferred amounts are expected to be recovered in future rates. Tax Disputes Tax Years 2007 – 2009 Edison International received a Revenue Agent Report from the IRS in February 2013 which included a proposed adjustment to disallow deductions related to certain capitalized overhead costs. Edison International has tentatively reached an agreement with the IRS regarding this matter, which if finalized, would result in a federal tax liability of approximately $64 million , including interest through March 31, 2016 . Tax Years 2010 – 2012 The IRS Revenue Agent Report was received in June 2015. As a result, Edison International and SCE have re-measured their Federal and State uncertain tax positions and recorded $94 million and $100 million , respectively, of income tax benefits including interest and penalty during the second quarter of 2015. The Revenue Agent Report included a proposed adjustment to disallow deductions related to certain capitalized overhead expenses. Edison International has tentatively reached an agreement with IRS regarding this matter, which if finalized, would result in a federal tax liability of approximately $9 million , including interest through March 31, 2016 . Tax years that remain open for examination by the IRS and the California Franchise Tax Board are 2007 – 2015 and 2003 – 2015, respectively.

Compensation and Benefit Plans

Compensation and Benefit Plans	3 Months Ended
	Mar. 31, 2016
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Compensation and Benefit Plans	Compensation and Benefit Plans Pension Plans Edison International made contributions of $5 million during the three months ended March 31, 2016, which includes contributions of $1 million by SCE. Edison International expects to make contributions of $115 million during the remainder of 2016 , which includes $94 million from SCE. Annual contributions made by SCE to most of SCE's pension plans are anticipated to be recovered through CPUC-approved regulatory mechanisms. Annual contributions to these plans are expected to be, at a minimum, equal to the related annual expense. Pension expense components for continuing operations are: Edison International SCE Three months ended March 31, (in millions) 2016 2015 2016 2015 Service cost $ 39 $ 35 $ 38 $ 35 Interest cost 44 41 41 38 Expected return on plan assets (56 ) (57 ) (53 ) (53 ) Amortization of prior service cost 1 1 1 1 Amortization of net loss 1 9 9 8 7 Expense under accounting standards $ 37 $ 29 $ 35 $ 28 Regulatory adjustment (9 ) (1 ) (9 ) (1 ) Total expense recognized $ 28 $ 28 $ 26 $ 27 1 Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International and SCE was $3 million and $2 million , respectively, for the three months ended March 31, 2016 , and $3 million and $2 million , respectively, for the three months ended March 31, 2015 . Postretirement Benefits Other Than Pensions Edison International made contributions of $7 million during the three months ended March 31, 2016 and expects to make contributions of $26 million during the remainder of 2016 , substantially all of which are expected to be made by SCE. Annual contributions made to SCE plans are anticipated to be recovered through CPUC-approved regulatory mechanisms and are expected to be, at a minimum, equal to the total annual expense for these plans, pending the outcome of the 2015 GRC decision. Benefits under these plans, with some exceptions, are generally unvested and subject to change. Under the terms of the Edison International Health and Welfare Plan ("PBOP Plan") each participating employer (Edison International or its participating subsidiaries) is responsible for the costs and expenses of all PBOP benefits with respect to its employees and former employees. A participating employer may terminate the PBOP benefits with respect to its employees and former employees, as may SCE (as Plan sponsor), and, accordingly, the participants' PBOP benefits are not vested benefits. PBOP expense components for continuing operations are: Edison International SCE Three months ended March 31, (in millions) 2016 2015 2016 2015 Service cost $ 10 $ 12 $ 10 $ 12 Interest cost 26 29 26 28 Expected return on plan assets (28 ) (28 ) (28 ) (28 ) Amortization of prior service cost (1 ) (3 ) (1 ) (3 ) Amortization of net loss — 6 — 6 Total expense $ 7 $ 16 $ 7 $ 15 Workforce Reductions SCE continues to focus on productivity improvements to mitigate rate pressure from its capital program, optimize its cost structure and improve operational efficiency, which is expected to result in further workforce reductions through 2016. During the three months ended March 31, 2016, SCE increased the estimated impact for approved workforce reductions. The following table provides a summary of changes in the accrued severance liability associated with these reductions: (in millions) Balance at January 1, 2016 $ 22 Additions 5 Payments (15 ) Balance at March 31, 2016 $ 12 The liability presented in the table above is reflected in "Other current liabilities" on the consolidated balance sheets. The severance costs are included in "Operation and maintenance" on the consolidated income statements.

Investments

Investments	3 Months Ended
	Mar. 31, 2016
Regulated Entity, Other Assets, Noncurrent [Abstract]
Investments	Investments Nuclear Decommissioning Trusts Future decommissioning costs related to SCE's nuclear assets are expected to be funded from independent decommissioning trusts. The following table sets forth amortized cost and fair value of the trust investments (see Note 4 for a discussion of fair value of the trust investments): Longest Maturity Dates Amortized Cost Fair Value (in millions) March 31, December 31, March 31, December 31, 2015 Stocks — $ 311 $ 304 $ 1,464 $ 1,460 Municipal bonds 2054 736 691 894 840 U.S. government and agency securities 2046 1,002 1,070 1,092 1,128 Corporate bonds 2057 662 708 731 755 Short-term investments and receivables/payables 1 One-year 106 144 109 148 Total $ 2,817 $ 2,917 $ 4,290 $ 4,331 1 Short-term investments include $8 million and $81 million of repurchase agreements payable by financial institutions which earn interest, are fully secured by U.S. Treasury securities and mature by April 4, 2016 and January 5, 2016 as of March 31, 2016 and December 31, 2015 , respectively. Trust fund earnings (based on specific identification) increase the trust fund balance and the ARO regulatory liability. Unrealized holding gains, net of losses, were $1.5 billion and $1.4 billion at March 31, 2016 and December 31, 2015 , respectively. The following table sets forth a summary of changes in the fair value of the trust: Three months ended March 31, (in millions) 2016 2015 Balance at beginning of period $ 4,331 $ 4,799 Gross realized gains 17 27 Gross realized losses (3 ) (2 ) Unrealized gains, net 59 44 Other-than-temporary impairments (7 ) (4 ) Interest and dividends 29 28 Contributions — 7 Income taxes (18 ) — Decommissioning disbursements (116 ) — Administrative expenses and other (2 ) (3 ) Balance at end of period $ 4,290 $ 4,896 Trust assets are used to pay income taxes as the Trust files separate income taxes returns from SCE. Deferred income taxes related to unrealized gains at March 31, 2016 were $357 million . Accordingly, the fair value of Trust assets available to pay future decommissioning costs, net of deferred income taxes, totaled $3.9 billion at March 31, 2016 . Due to regulatory mechanisms, changes in assets of the trusts from income or loss items have no impact on operating revenue or earnings.

Regulatory Assets and Liabiliti

Regulatory Assets and Liabilities	3 Months Ended
	Mar. 31, 2016
Regulatory Assets and Liabilities Disclosure [Abstract]
Regulatory Assets and Liabilities	Regulatory Assets and Liabilities Regulatory Assets SCE's regulatory assets included on the consolidated balance sheets are: (in millions) March 31, December 31, Current: Regulatory balancing accounts $ 329 $ 382 Energy derivatives 182 159 Other 27 19 Total current 538 560 Long-term: Deferred income taxes, net 3,920 3,757 Pensions and other postretirement benefits 842 849 Energy derivatives 1,066 1,027 Unamortized investments, net 169 182 San Onofre 982 1,043 Unamortized loss on reacquired debt 197 201 Regulatory balancing accounts 39 36 Environmental remediation 131 129 Other 282 288 Total long-term 7,628 7,512 Total regulatory assets $ 8,166 $ 8,072 Regulatory Liabilities SCE's regulatory liabilities included on the consolidated balance sheets are: (in millions) March 31, December 31, Current: Regulatory balancing accounts $ 1,135 $ 1,106 Other 22 22 Total current 1,157 1,128 Long-term: Costs of removal 2,822 2,781 Recoveries in excess of ARO liabilities 1 1,690 1,502 Regulatory balancing accounts 1,352 1,314 Other 56 79 Total long-term 5,920 5,676 Total regulatory liabilities $ 7,077 $ 6,804 1 Represents the cumulative differences between ARO expenses and amounts collected in rates primarily for the decommissioning of the SCE's nuclear generation facilities. Decommissioning costs recovered through rates are primarily placed in nuclear decommissioning trusts. This regulatory liability also represents the deferral of realized and unrealized gains and losses on the nuclear decommissioning trust investments. See Note 9. Net Regulatory Balancing Accounts The following table summarizes the significant components of regulatory balancing accounts included in the above tables of regulatory assets and liabilities: (in millions) March 31, December 31, Asset (liability) Energy resource recovery account $ (364 ) $ (439 ) New system generation balancing account (189 ) (171 ) Public purpose programs and energy efficiency programs (817 ) (683 ) Tax accounting memorandum account and pole loading balancing account (278 ) (248 ) Base rate recovery balancing account (234 ) (319 ) Greenhouse gas auction revenue (156 ) (75 ) FERC balancing accounts 43 74 Generator settlements — (4 ) Other (124 ) (137 ) Liability $ (2,119 ) $ (2,002 )

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Indemnities Edison International and SCE have various financial and performance guarantees and indemnity agreements which are issued in the normal course of business. Edison International and SCE have provided indemnifications through contracts entered into in the normal course of business. These are primarily indemnifications against adverse litigation outcomes in connection with underwriting agreements, and indemnities for specified environmental liabilities and income taxes with respect to assets sold. Edison International's and SCE's obligations under these agreements may or may not be limited in terms of time and/or amount, and in some instances Edison International and SCE may have recourse against third parties. Edison International and SCE have not recorded a liability related to these indemnities. The overall maximum amount of the obligations under these indemnifications cannot be reasonably estimated. SCE has indemnified the City of Redlands, California in connection with Mountainview's California Energy Commission permit for cleanup or associated actions related to groundwater contaminated by perchlorate due to the disposal of filter cake at the City's solid waste landfill. The obligations under this agreement are not limited to a specific time period or subject to a maximum liability. SCE has not recorded a liability related to this indemnity. Contingencies In addition to the matters disclosed in these Notes, Edison International and SCE are involved in other legal, tax and regulatory proceedings before various courts and governmental agencies regarding matters arising in the ordinary course of business. Edison International and SCE believe the outcome of these other proceedings will not, individually or in the aggregate, materially affect its results of operations or liquidity. San Onofre Related Matters Replacement steam generators were installed at San Onofre in 2010 and 2011. On January 31, 2012, a leak suddenly occurred in one of the heat transfer tubes in San Onofre's Unit 3 steam generators. The Unit was safely taken off-line and subsequent inspections revealed excessive tube wear. Unit 2 was off-line for a planned outage when areas of unexpected tube wear were also discovered. On June 6, 2013, SCE decided to permanently retire Units 2 and 3. Settlement of San Onofre CPUC Proceedings In November 2014, the CPUC approved the San Onofre OII Settlement Agreement that SCE had entered into with TURN, ORA, SDG&E, the Coalition of California Utility Employees, and Friends of the Earth. The San Onofre OII Settlement Agreement resolved the CPUC's investigation regarding the Steam Generator Replacement Project at San Onofre and the related outages and subsequent shutdown of San Onofre. The San Onofre OII Settlement Agreement does not affect proceedings related to recoveries from third parties described below, but does describe how shareholders and customers will share any recoveries. Challenges related to San Onofre CPUC Proceedings A federal lawsuit challenging the CPUC's authority to permit rate recovery of San Onofre costs and an application to the CPUC for rehearing of its decision approving the San Onofre OII Settlement Agreement were filed in November and December 2014, respectively. In April 2015, the federal lawsuit was dismissed with prejudice and the plaintiffs in that case appealed the dismissal to the Ninth Circuit in May 2015. Both the appeal and the application for rehearing remain pending. In April 2015, the Alliance for Nuclear Responsibility ("A4NR") filed a petition to modify the CPUC's decision approving the San Onofre OII Settlement Agreement based on SCE's alleged failures to disclose communications between SCE and CPUC decision-makers pertaining to issues in the San Onofre OII. The petition seeks the reversal of the decision approving the San Onofre OII Settlement Agreement and reopening of the OII proceeding. Subsequently, TURN and ORA filed responses supporting A4NR's petition to reopen the San Onofre OII proceeding. In August 2015, ORA filed its own petition to modify the CPUC's decision approving the San Onofre OII Settlement Agreement seeking to set aside the settlement and reopen the San Onofre OII proceeding. SCE and SDG&E responded to this petition in September 2015. Both petitions remain pending before the CPUC. In July 2015, a purported securities class action lawsuit was filed in federal court against Edison International, its Chief Executive Officer and Chief Financial Officer and was later amended to include SCE's former President as a defendant. The lawsuit alleges that the defendants violated the securities laws by failing to disclose that Edison International had ex parte contacts with CPUC decision-makers regarding the San Onofre OII that were either unreported or more extensive than initially reported. The complaint purports to be filed on behalf of a class of persons who acquired Edison International common stock between March 21, 2014 and June 24, 2015. Subsequently and also in July 2015, a federal shareholder derivative lawsuit was filed against members of the Edison International Board of Directors for breach of fiduciary duty and other claims. The federal derivative lawsuit is based on similar allegations to the federal class action securities lawsuit and seeks monetary damages, including punitive damages, and various corporate governance reforms. An additional federal shareholder derivative lawsuit making essentially the same allegations was filed in August and was subsequently consolidated with the July 2015 federal derivative lawsuit. In October 2015, a shareholder derivative lawsuit was filed in California state court against members of the Edison International Board of Directors for breach of fiduciary duty and other claims, making similar allegations to those in the federal derivative lawsuits discussed above. In November 2015, a purported securities class action lawsuit was filed in federal court against Edison International, its Chief Executive Officer and Treasurer by an Edison International employee, alleging claims under the Employee Retirement Income Security Act ("ERISA"). The complaint purports to be filed on behalf of a class of Edison International employees who were participants in the Edison 401(k) Savings Plan and invested in the Edison International Stock Fund between March 27, 2014 and June 24, 2015. The complaint alleges that defendants breached their fiduciary duties because they knew or should have known that investment in the Edison International Stock Fund was imprudent because the price of Edison International common stock was artificially inflated due to Edison International's alleged failure to disclose certain ex parte communications with CPUC decision-makers related to the San Onofre OII. Edison International and SCE cannot predict the outcome of these proceedings. MHI Claims SCE is also pursuing claims against Mitsubishi Heavy Industries, Ltd. and a related company ("MHI"), which designed and supplied the RSGs. MHI warranted the RSGs for an initial period of 20 years from acceptance and is contractually obligated to repair or replace defective items with dispatch and to pay specified damages for certain repairs. MHI's stated liability under the purchase agreement is limited to $138 million and excludes consequential damages, defined to include "the cost of replacement power;" however, limitations in the contract are subject to applicable exceptions both in the contract and under law. SCE has advised MHI that it believes one or more of such exceptions apply and that MHI's liability is not limited to $138 million . MHI has advised SCE that it disagrees. In October 2013, SCE sent MHI a formal request for binding arbitration under the auspices of the International Chamber of Commerce in accordance with the purchase contract seeking damages for all losses. In the request for arbitration, SCE alleges contract and tort claims and seeks at least $4 billion in damages on behalf of itself and its customers and in its capacity as Operating Agent for San Onofre. MHI has denied any liability and has asserted counterclaims for $41 million , for which SCE has denied any liability. Each of the other San Onofre owners sued MHI, alleging claims arising from MHI's supplying the faulty steam generators. These litigation claims have been stayed pending the arbitration. The other co-owners (SDG&E and Riverside) have been added as additional claimants in the arbitration. The arbitration is being conducted pursuant to a confidentiality order issued by the arbitration panel. Hearings concluded on April 29, 2016. A decision may be issued by year-end 2016 but could be later. SCE, on behalf of itself and the other San Onofre co-owners, has submitted seven invoices to MHI totaling $149 million for steam generator repair costs incurred through April 30, 2013. MHI paid the first invoice of $45 million , while reserving its right to challenge it and subsequently rejected a portion of the first invoice and has not paid further invoices, claiming further documentation is required, which SCE disputes. SCE recorded its share of the invoice paid (approximately $35 million ) as a reduction of repair and inspection costs in 2012. Under the San Onofre OII Settlement Agreement, recoveries from MHI (including amounts paid by MHI under the first invoice), if any, will first be applied to reimburse costs incurred in pursuing such recoveries, including litigation costs. To the extent SCE's share of recoveries from MHI exceed such costs, they will be allocated 50% to customers and 50% to SCE. The first $282 million of SCE's customers' portion of such recoveries from MHI will be distributed to customers via a credit to a sub-account of SCE's Base Revenue Requirement Balancing Account ("BRRBA"), reducing revenue requirements from customers. Amounts in excess of the first $282 million distributable to SCE customers will reduce SCE's regulatory asset represented by the unamortized balance of investment in San Onofre base plant, reducing the revenue requirement needed to amortize such investment. The amortization period, however, will be unaffected. Any additional amounts received after the regulatory asset is recovered will be applied to the BRRBA. The San Onofre OII Settlement Agreement provides the utilities with the discretion to resolve the MHI dispute without CPUC approval, but the utilities are obligated to use their best efforts to inform the CPUC of any settlement or other resolution of these disputes to the extent this is possible without compromising any aspect of the resolution. SCE and SDG&E have also agreed to allow the CPUC to review the documentation of any final resolution of the MHI dispute and the litigation costs incurred in pursuing claims against MHI to ensure they are not exorbitant in relation to the recovery obtained. There is no assurance that there will be any recovery from MHI or, if there is a recovery, that it will equal or exceed the litigation costs incurred to pursue the recovery. Energy Efficiency Incentive Mechanism In September 2015, the CPUC granted TURN and ORA requests for rehearing of prior CPUC decisions related to $74.5 million of incentive awards that SCE received for savings achieved by its 2006 – 2008 energy efficiency programs. In March 2016, ORA and TURN filed a joint proposal requesting that the CPUC recalculate SCE's 2006 – 2008 incentive awards and order SCE to refund $39.9 million to its customers. SCE disputes the assertion that SCE should be at risk to repay previously awarded incentives. SCE cannot predict the outcome of these petitions. Long Beach Service Interruptions In July 2015, SCE's customers who are served via the network portion of SCE's electric system in Long Beach, California experienced service interruptions due to multiple underground vault fires and underground cable failures. No personal injuries have been reported in connection with these events. SCE instituted an internal investigation and commissioned an external investigation of these events and their causes, which revealed that the main cause of the interruptions was a lack of adequate management oversight of the downtown network system. The investigations also revealed deficiencies in maintaining the knowledge base on the configuration and operation of the system, and a lack of sophisticated controls needed to more efficiently and effectively prevent and respond to the cascading events that occurred. These events and their causes are also being investigated by the CPUC's SED. SCE is unable to estimate a possible loss or range of loss associated with any penalties that may be imposed by the CPUC related to this matter. Subject to applicable deductibles, SCE is generally insured against customer claims arising from these service interruptions. Environmental Remediation SCE records its environmental remediation liabilities when site assessments and/or remedial actions are probable and a range of reasonably likely cleanup costs can be estimated. SCE reviews its sites and measures the liability quarterly, by assessing a range of reasonably likely costs for each identified site using currently available information, including existing technology, presently enacted laws and regulations, experience gained at similar sites, and the probable level of involvement and financial condition of other potentially responsible parties. These estimates include costs for site investigations, remediation, operation and maintenance, monitoring and site closure. Unless there is a single probable amount, SCE records the lower end of this reasonably likely range of costs (reflected in "Other long-term liabilities") at undiscounted amounts as timing of cash flows is uncertain. At March 31, 2016 , SCE's recorded estimated minimum liability to remediate its 19 identified material sites (sites in which the upper end of the range of the costs is at least $1 million ) was $133 million , including $80 million related to San Onofre. In addition to these sites, SCE also has 39 immaterial sites for which the total minimum recorded liability was $3 million . Of the $136 million total environmental remediation liability for SCE, $131 million has been recorded as a regulatory asset. SCE expects to recover $49 million through an incentive mechanism that allows SCE to recover 90% of its environmental remediation costs at certain sites (SCE may request to include additional sites) and $82 million through a mechanism that allows SCE to recover 100% of the costs incurred at certain sites through customer rates. SCE's identified sites include several sites for which there is a lack of currently available information, including the nature and magnitude of contamination, and the extent, if any, that SCE may be held responsible for contributing to any costs incurred for remediating these sites. Thus, no reasonable estimate of cleanup costs can be made for these sites. The ultimate costs to clean up SCE's identified sites may vary from its recorded liability due to numerous uncertainties inherent in the estimation process, such as: the extent and nature of contamination; the scarcity of reliable data for identified sites; the varying costs of alternative cleanup methods; developments resulting from investigatory studies; the possibility of identifying additional sites; and the time periods over which site remediation is expected to occur. SCE believes that, due to these uncertainties, it is reasonably possible that cleanup costs at the identified material sites and immaterial sites could exceed its recorded liability by up to $165 million and $7 million , respectively. The upper limit of this range of costs was estimated using assumptions least favorable to SCE among a range of reasonably possible outcomes. SCE expects to clean up and mitigate its identified sites over a period of up to 30 years. Remediation costs for each of the next five years are expected to range from $7 million to $23 million . Costs incurred were $1 million for both the three months ended March 31, 2016 and 2015. Based upon the CPUC's regulatory treatment of environmental remediation costs incurred at SCE, SCE believes that costs ultimately recorded will not materially affect its results of operations, financial position or cash flows. There can be no assurance, however, that future developments, including additional information about existing sites or the identification of new sites, will not require material revisions to estimates. Nuclear Insurance SCE is a member of NEIL, a mutual insurance company owned by entities with nuclear facilities. NEIL provides insurance for nuclear property damage, including damages caused by acts of terrorism up to specified limits, and for accidental outages for active facilities. The amount of nuclear property damage insurance purchased for San Onofre and Palo Verde exceeds the minimum federal requirement of $1.06 billion . If NEIL losses at any nuclear facility covered by the arrangement were to exceed the accumulated funds for these insurance programs, SCE could be assessed retrospective premium adjustments of up to approximately $45 million per year. Federal law limits public offsite liability claims for bodily injury and property damage from a nuclear incident to the amount of available financial protection, which is currently approximately $13.5 billion . Based on its ownership interests, SCE could be required to pay a maximum of approximately $255 million per nuclear incident. However, it would have to pay no more than approximately $38 million per incident in any one year. For more information on nuclear insurance coverage, see Note 11 in the 2015 Form 10-K. Wildfire Insurance Severe wildfires in California have given rise to large damage claims against California utilities for fire-related losses alleged to be the result of the failure of electric and other utility equipment. Invoking a California Court of Appeal decision, plaintiffs pursuing these claims have relied on the doctrine of inverse condemnation, which can impose strict liability (including liability for a claimant's attorneys' fees) for property damage. Prolonged drought conditions in California have also increased the risk of severe wildfire events. On June 1, 2015, Edison International renewed its liability insurance coverage, which included coverage for SCE's wildfire liabilities up to a $610 million limit (with a self-insured retention of $10 million per wildfire occurrence). Various coverage limitations within the policies that make up this insurance coverage could result in additional self-insured costs in the event of multiple wildfire occurrences during the policy period (June 1, 2015 to May 31, 2016). SCE also has additional coverage for certain wildfire liabilities of $390 million , which applies when total covered wildfire claims exceed $610 million , through June 14, 2016. SCE may experience coverage reductions and/or increased insurance costs in future years. No assurance can be given that future losses will not exceed the limits of SCE's insurance coverage. Spent Nuclear Fuel Under federal law, the Department of Energy ("DOE") is responsible for the selection and construction of a facility for the permanent disposal of spent nuclear fuel and high-level radioactive waste. The DOE has not met its contractual obligation to accept spent nuclear fuel. Extended delays by the DOE have led to the construction of costly alternatives and associated siting and environmental issues. Currently, both San Onofre and Palo Verde have interim storage for spent nuclear fuel on site sufficient for their current license period. In June 2010, the United States Court of Federal Claims issued a decision granting SCE and the San Onofre co-owners damages of approximately $142 million (SCE share $112 million ) to recover costs incurred through December 31, 2005 for the DOE's failure to meet its obligation to begin accepting spent nuclear fuel from San Onofre. SCE received payment from the federal government in the amount of the damage award. In April 2016, SCE, as operating agent, settled a lawsuit on behalf of the San Onofre owners against the DOE for $162 million (SCE share $124 million ) to compensate for damages caused by the DOE's failure to meet its obligation to begin accepting spent nuclear fuel for the period from January 1, 2006 to December 31, 2013. The settlement also provides for a claim submission/audit process for expenses incurred from 2014 – 2016, where SCE will submit a claim for damages caused by the DOE failure to accept spent nuclear fuel each year, followed by a government audit and payment of the claim. This process will make additional legal action to recover damages incurred in 2014 – 2016 unnecessary. All damages recovered by SCE are subject to CPUC review as to how these amounts would be distributed among customers, shareholders, or to offset fuel decommissioning or storage costs.

Preferred and Preference Stock

Preferred and Preference Stock of Utility	3 Months Ended
	Mar. 31, 2016
Preferred And Preference Stock Of Utility Disclosure [Abstract]
Preferred and Preference Stock of Utility	Preferred and Preference Stock of SCE During the first quarter of 2016, SCE issued $300 million of 5.45% Series K Preference Stock ( 120,004 shares; cumulative, $2,500 liquidation value) to SCE Trust V, a special purpose entity formed to issue trust securities as discussed in Note 3. The Series K Preference Stock may be redeemed at par, in whole, but not in part, at any time prior to March 15, 2026 if certain changes in tax or investment company laws occur. On or after March 15, 2026, SCE may redeem the Series K shares at par, in whole or in part and distributions will accrue and be payable at a floating rate. The shares are not subject to mandatory redemption. The proceeds were used to redeem $125 million of SCE's Series D Preference Stock and for general corporate purposes.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	3 Months Ended
	Mar. 31, 2016
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Edison International's accumulated other comprehensive loss, net of tax consist of: Edison International SCE Three months ended March 31, (in millions) 2016 2015 2016 2015 Beginning balance $ (56 ) $ (58 ) $ (22 ) $ (28 ) Pension and PBOP – net loss: Other comprehensive loss before reclassifications — (3 ) — — Reclassified from accumulated other comprehensive loss 1 2 2 1 1 Change 2 (1 ) 1 1 Ending Balance $ (54 ) $ (59 ) $ (21 ) $ (27 ) 1 These items are included in the computation of net periodic pension and PBOP expense. See Note 8 for additional information.

Interest and Other Income and O

Interest and Other Income and Other Expenses	3 Months Ended
	Mar. 31, 2016
Other Income and Expenses [Abstract]
Interest and Other Income and Other Expenses	Interest and Other Income and Other Expenses Interest and other income and other expenses are as follows: Three months ended March 31, (in millions) 2016 2015 SCE interest and other income: Equity allowance for funds used during construction $ 22 $ 21 Increase in cash surrender value of life insurance policies and life insurance benefits 7 10 Interest income — 1 Other 2 1 Total SCE interest and other income 31 33 Other income of Edison International Parent and Other — 6 Total Edison International interest and other income $ 31 $ 39 SCE other expenses: Civic, political and related activities and donations $ (5 ) $ (5 ) Other — (2 ) Total SCE other expenses (5 ) (7 ) Other expense of Edison International Parent and Other (1 ) (3 ) Total Edison International other expenses $ (6 ) $ (10 )

Supplemental Cash Flows Informa

Supplemental Cash Flows Information	3 Months Ended
	Mar. 31, 2016
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flows Information	Supplemental Cash Flows Information Supplemental cash flows information for continuing operations is: Edison International SCE Three months ended March 31, (in millions) 2016 2015 2016 2015 Cash payments for interest and taxes: Interest, net of amounts capitalized $ 158 $ 152 $ 149 $ 144 Tax payments, net 2 — 11 32 Non-cash financing and investing activities: Dividends declared but not paid: Common stock $ 156 $ 136 $ — $ 147 Preferred and preference stock 1 3 1 3 SCE's accrued capital expenditures at March 31, 2016 and 2015 were $360 million and $407 million , respectively. Accrued capital expenditures will be included as an investing activity in the consolidated statements of cash flow in the period paid.

Summary of Significant Accoun23

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation Edison International is the parent holding company of Southern California Edison Company ("SCE"). SCE is an investor-owned public utility primarily engaged in the business of supplying and delivering electricity to an approximately 50,000 square mile area of southern California. Edison International is also the parent company of Edison Energy Group, a company that holds interests in subsidiaries that are engaged in competitive businesses focused on providing energy services to commercial and industrial customers, including distributed resources, engaging in competitive transmission opportunities, and exploring distributed water treatment and recycling. Such competitive business activities are currently not material to report as a separate business segment. These combined notes to the consolidated financial statements apply to both Edison International and SCE unless otherwise described. Edison International's consolidated financial statements include the accounts of Edison International, SCE and other wholly owned and controlled subsidiaries. References to Edison International refer to the consolidated group of Edison International and its subsidiaries. References to Edison International Parent and Other refer to Edison International Parent and its nonutility subsidiaries. SCE's consolidated financial statements include the accounts of SCE and its wholly owned and controlled subsidiaries. All intercompany transactions have been eliminated from the consolidated financial statements. Edison International's and SCE's significant accounting policies were described in Note 1 of "Notes to Consolidated Financial Statements" included in the 2015 Form 10-K. This quarterly report should be read in conjunction with the financial statements and notes included in the 2015 Form 10-K. In the opinion of management, all adjustments, consisting of recurring accruals, have been made that are necessary to fairly state the consolidated financial position, results of operations and cash flows in accordance with accounting principles generally accepted in the United States of America for the periods covered by this quarterly report on Form 10-Q. The results of operations for the three-month period ended March 31, 2016 are not necessarily indicative of the operating results for the full year. The December 31, 2015 financial statement data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America.
Cash Equivalents	Cash Equivalents Cash equivalents included investments in money market funds. Generally, the carrying value of cash equivalents equals the fair value, as these investments have original maturities of three months or less.
Inventory	Inventory Inventory is primarily composed of materials, supplies and spare parts, and stated at the lower of cost or market, cost being determined by the average cost method.
Earnings Per Share	Earnings Per Share Edison International computes earnings per common share ("EPS") using the two-class method, which is an earnings allocation formula that determines EPS for each class of common stock and participating security. Edison International's participating securities are stock-based compensation awards payable in common shares, including performance shares and restricted stock units, which earn dividend equivalents on an equal basis with common shares once the awards are vested.
New Accounting Guidance	New Accounting Guidance Accounting Guidance Adopted On April 7, 2015, the FASB issued an accounting standards update that requires debt issuance costs to be presented in the balance sheet as a direct deduction from the carrying amount of the related debt liability, consistent with debt discounts. Previously, accounting guidance required these costs to be presented as a deferred charge asset. Edison International and SCE adopted this guidance in the first quarter of 2016. At March 31, 2016, the amount of debt issuance costs that are reflected as a deduction of "Long-term debt" was $76 million for SCE and $83 million for Edison International. At December 31, 2015 the amount of debt issuance costs that have been reclassified from "Other long-term assets" to a deduction of "Long-term debt" was $77 million for SCE and $81 million for Edison International. On April 15, 2015, the FASB issued an accounting standards update on fees paid by a customer for software licenses. This new standard provides guidance about whether a cloud computing arrangement includes a software license which may be capitalized in certain circumstances. If a cloud computing arrangement does not include a software license, then the arrangement should be accounted for as a service contract. Edison International and SCE adopted this guidance prospectively, effective January 1, 2016. The adoption of this standard did not have a material impact on Edison International's and SCE's consolidated financial statements. Accounting Guidance Not Yet Adopted On May 28, 2014, the FASB issued an accounting standards update on revenue recognition including enhanced disclosures and further amended the standard in 2016. Under the new standard, revenue is recognized when (or as) a good or service is transferred to the customer and the customer obtains control of the good or service. On July 9, 2015, the FASB approved a one-year deferral, updating the effective date to January 1, 2018. Edison International and SCE are currently evaluating this new guidance and cannot determine the impact of this standard at this time. Edison International and SCE anticipates adopting the standard using the modified retrospective application which means that we would recognize the cumulative effect of initially applying the revenue standard as an adjustment to the opening balance of retained earnings in 2018. On January 5, 2016, the FASB issued an accounting standards update that amends the guidance on the classification and measurement of financial instruments. The amendments require equity investments (excluding those accounted for under the equity method or those that result in consolidation) to be measured at fair value, with changes in fair value recognized in net income. It also amends certain disclosure requirements associated with the fair value of financial instruments. In addition, the new guidance requires financial assets and financial liabilities to be presented separately in the notes to the financial statements, grouped by measurement category and form of financial asset. Edison International and SCE will adopt this guidance effective January 1, 2018. The adoption of this standard is not expected to have a material impact on Edison International's and SCE's consolidated financial statements. On February 25, 2016, the FASB issued an accounting standards update related to lease accounting including enhanced disclosures. Under the new standard, a lease is defined as a contract, or part of a contract, that conveys the right to control the use of identified assets for a period of time in exchange for consideration. Lessees will classify leases with a term of more than one year as either operating or finance leases and will need to recognize a right-of-use asset and a lease liability. The liability will be equal to the present value of lease payments. The asset will be based on the liability, subject to adjustment, such as for initial direct costs. Operating leases will result in straight-line expense while finance leases will result in a front-loaded expense pattern. This guidance is effective January 1, 2019 but early adoption is permitted. Edison International and SCE are currently evaluating this new guidance and cannot determine the impact of this standard at this time. On March 30, 2016, the FASB issued an accounting standards update to simplify the accounting for share-based payments. Under this new guidance, the tax effects related to share based payments will be recorded through the income statement. Currently, tax benefits in excess of compensation cost ("windfalls") are recorded in equity, and tax deficiencies ("shortfalls") are recorded in equity to the extent of previous windfalls, and then to the income statement. This guidance is effective January 1, 2017 but early adoption is permitted. The new standard also revised reporting on the statement of cash flows. Edison International and SCE are currently evaluating this new guidance.

Summary of Significant Accoun24

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Cash Equivalents	The cash equivalents were as follows: Edison International SCE (in millions) March 31, December 31, 2015 March 31, December 31, 2015 Money market funds $ 36 $ 37 $ 7 $ 8 Cash is temporarily invested until required for check clearing. Checks issued, but not yet paid by the financial institution, are reclassified from cash to accounts payable at the end of each reporting period as follows: Edison International SCE (in millions) March 31, December 31, 2015 March 31, December 31, 2015 Book balances reclassified to accounts payable $ 102 $ 162 $ 102 $ 158
EPS Attributable to Edison International Common Shareholders	EPS attributable to Edison International common shareholders was computed as follows: Three months ended March 31, (in millions, except per-share amounts) 2016 2015 Basic earnings per share – continuing operations: Income from continuing operations attributable to common shareholders $ 270 $ 299 Participating securities dividends — — Income from continuing operations available to common shareholders $ 270 $ 299 Weighted average common shares outstanding 326 326 Basic earnings per share – continuing operations $ 0.83 $ 0.92 Diluted earnings per share – continuing operations: Income from continuing operations available to common shareholders $ 270 $ 299 Income impact of assumed conversions — — Income from continuing operations available to common shareholders and assumed conversions $ 270 $ 299 Weighted average common shares outstanding 326 326 Incremental shares from assumed conversions 2 3 Adjusted weighted average shares – diluted 328 329 Diluted earnings per share – continuing operations $ 0.82 $ 0.91

Consolidated Statements of Ch25

Consolidated Statements of Changes in Equity (Tables)	3 Months Ended
	Mar. 31, 2016
Schedule of Capitalization, Equity [Line Items]
Schedule of changes in equity	The following table provides Edison International's changes in equity for the three months ended March 31, 2016 : Equity Attributable to Common Shareholders Noncontrolling Interests (in millions, except per-share amounts) Common Stock Accumulated Retained Earnings Subtotal Preferred and Preference Stock Total Equity Balance at December 31, 2015 $ 2,484 $ (56 ) $ 8,940 $ 11,368 $ 2,020 $ 13,388 Net income — — 271 271 30 301 Other comprehensive income — 2 — 2 — 2 Common stock dividends declared ($0.48 per share) — — (156 ) (156 ) — (156 ) Dividends to noncontrolling interests — — — — (30 ) (30 ) Stock-based compensation 1 — (50 ) (49 ) — (49 ) Non-cash stock-based compensation 6 — — 6 — 6 Issuance of preference stock — — — — 294 294 Redemption of preference stock — — (3 ) (3 ) (122 ) (125 ) Balance at March 31, 2016 $ 2,491 $ (54 ) $ 9,002 $ 11,439 $ 2,192 $ 13,631 The following table provides Edison International's changes in equity for the three months ended March 31, 2015 : Equity Attributable to Common Shareholders Noncontrolling Interests (in millions, except per-share amounts) Common Stock Accumulated Retained Earnings Subtotal Preferred and Preference Stock Total Equity Balance at December 31, 2014 $ 2,445 $ (58 ) $ 8,573 $ 10,960 $ 2,022 $ 12,982 Net income — — 299 299 28 327 Other comprehensive loss — (1 ) — (1 ) — (1 ) Common stock dividends declared ($0.4175 per share) — — (136 ) (136 ) — (136 ) Dividends to noncontrolling interests — — — — (28 ) (28 ) Stock-based compensation 9 — (61 ) (52 ) — (52 ) Non-cash stock-based compensation 6 — — 6 — 6 Balance at March 31, 2015 $ 2,460 $ (59 ) $ 8,675 $ 11,076 $ 2,022 $ 13,098
Southern California Edison
Schedule of Capitalization, Equity [Line Items]
Schedule of changes in equity	The following table provides SCE's changes in equity for the three months ended March 31, 2016 : Equity Attributable to Edison International (in millions) Common Additional Accumulated Retained Preferred Total Balance at December 31, 2015 $ 2,168 $ 652 $ (22 ) $ 8,804 $ 2,070 $ 13,672 Net income — — — 317 — 317 Other comprehensive income — — 1 — — 1 Dividends declared on common stock — — — (170 ) — (170 ) Dividends declared on preferred and preference stock — — — (30 ) — (30 ) Stock-based compensation — 1 — (34 ) — (33 ) Non-cash stock-based compensation — 3 — — — 3 Issuance of preference stock — (6 ) — — 300 294 Redemption of preference stock — 3 — (3 ) (125 ) (125 ) Balance at March 31, 2016 $ 2,168 $ 653 $ (21 ) $ 8,884 $ 2,245 $ 13,929 The following table provides SCE's changes in equity for the three months ended March 31, 2015 : Equity Attributable to Edison International (in millions) Common Additional Accumulated Retained Preferred Total Balance at December 31, 2014 $ 2,168 $ 618 $ (28 ) $ 8,454 $ 2,070 $ 13,282 Net income — — — 333 — 333 Other comprehensive income — — 1 — — 1 Dividends declared on common stock — — — (147 ) — (147 ) Dividends declared on preferred and preference stock — — — (28 ) — (28 ) Stock-based compensation — 9 — (22 ) — (13 ) Non-cash stock-based compensation — 4 — — — 4 Balance at March 31, 2015 $ 2,168 $ 631 $ (27 ) $ 8,590 $ 2,070 $ 13,432

Variable Interest Entities Trus

Variable Interest Entities Trust income (Tables)	3 Months Ended
	Mar. 31, 2016
Southern California Edison
Variable Interest Entity
Summary of Trusts' Income Statements	The following table provides a summary of the trusts' income statements: Three months ended March 31, (in millions) Trust I Trust II Trust III Trust IV Trust V 2016 Dividend income $ 7 $ 5 $ 4 $ 4 $ 1 Dividend distributions 7 5 4 4 1 2015 Dividend income $ 7 $ 5 $ 4 * * Dividend distributions 7 5 4 * * * Not applicable.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amounts and Fair Values of Long-term Debt, Including Current Portion	The carrying value and fair value of Edison International's and SCE's long-term debt (including current portion of long-term debt) are as follows: March 31, 2016 December 31, 2015 (in millions) Carrying Value Fair Value Carrying Value Fair Value SCE $ 10,501 $ 12,045 $ 10,616 $ 11,592 Edison International 11,538 13,109 11,259 12,252
Southern California Edison
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value by Level	The following table sets forth assets and liabilities of SCE that were accounted for at fair value by level within the fair value hierarchy: March 31, 2016 (in millions) Level 1 Level 2 Level 3 Netting and Collateral 1 Total Assets at fair value Derivative contracts $ — $ — $ 143 $ — $ 143 Other 28 — — — 28 Nuclear decommissioning trusts: Stocks 2 1,464 — — — 1,464 Fixed Income 3 907 1,810 — — 2,717 Short-term investments, primarily cash equivalents 69 48 — — 117 Subtotal of nuclear decommissioning trusts 4 2,440 1,858 — — 4,298 Total assets 2,468 1,858 143 — 4,469 Liabilities at fair value Derivative contracts — 21 1,356 (11 ) 1,366 Total liabilities — 21 1,356 (11 ) 1,366 Net assets (liabilities) $ 2,468 $ 1,837 $ (1,213 ) $ 11 $ 3,103 December 31, 2015 (in millions) Level 1 Level 2 Level 3 Netting and Collateral 1 Total Assets at fair value Derivative contracts $ — $ — $ 163 $ — $ 163 Other 28 — — — 28 Nuclear decommissioning trusts: Stocks 2 1,460 — — — 1,460 Fixed Income 3 947 1,776 — — 2,723 Short-term investments, primarily cash equivalents 91 81 — — 172 Subtotal of nuclear decommissioning trusts 4 2,498 1,857 — — 4,355 Total assets 2,526 1,857 163 — 4,546 Liabilities at fair value Derivative contracts — 22 1,311 (15 ) 1,318 Total liabilities — 22 1,311 (15 ) 1,318 Net assets (liabilities) $ 2,526 $ 1,835 $ (1,148 ) $ 15 $ 3,228 1 Represents the netting of assets and liabilities under master netting agreements and cash collateral across the levels of the fair value hierarchy. Netting among positions classified within the same level is included in that level. 2 Approximately 70% of SCE's equity investments were located in the United States at both March 31, 2016 and December 31, 2015 . 3 Includes corporate bonds, which were diversified and included collateralized mortgage obligations and other asset backed securities of $101 million and $111 million at March 31, 2016 and December 31, 2015 , respectively. 4 Excludes net payables of $8 million and net payables of $24 million at March 31, 2016 and December 31, 2015 , which consist of interest and dividend receivables as well as receivables and payables related to SCE's pending securities sales and purchases.
Summary of Changes in Fair Value of Level 3 Net Derivative Assets and Liabilities	The following table sets forth a summary of changes in SCE's fair value of Level 3 net derivative assets and liabilities: Three months ended March 31, (in millions) 2016 2015 Fair value of net liabilities at beginning of period $ (1,148 ) $ (902 ) Total realized/unrealized gains (losses): Included in regulatory assets and liabilities 1 (65 ) (74 ) Fair value of net liabilities at end of period $ (1,213 ) $ (976 ) Change during the period in unrealized gains and losses related to assets and liabilities held at the end of the period $ (84 ) $ (96 ) 1 Due to regulatory mechanisms, SCE's realized and unrealized gains and losses are recorded as regulatory assets and liabilities.
Valuation Techniques and Significant Unobservable Inputs Used to Determine Fair Value for Level 3 Assets and Liabilities	The following table sets forth SCE's valuation techniques and significant unobservable inputs used to determine fair value for significant Level 3 assets and liabilities: Fair Value (in millions) Significant Range Assets Liabilities Valuation Technique(s) Unobservable Input (Weighted Average) Congestion revenue rights March 31, 2016 $ 136 $ — Market simulation model and auction prices Load forecast 6,289 MW - 24,349 MW Power prices 1 $0 - $110.44 Gas prices 2 $1.98 - $5.72 December 31, 2015 152 — Market simulation model and auction prices Load forecast 6,289 MW - 24,349 MW Power prices 1 $0 - $110.44 Gas prices 2 $1.98 - $5.72 Tolling March 31, 2016 7 1,329 Option model Volatility of gas prices 16% - 46% (30%) Volatility of power prices 26% - 86% (40%) Power prices $17.67 - $47.29 ($33.00) December 31, 2015 10 1,297 Option model Volatility of gas prices 15% - 58% (20%) Volatility of power prices 26% - 38% (30%) Power prices $24.15 - $46.93 ($34.80) 1 Prices are in dollars per megawatt-hour. 2 Prices are in dollars per million British thermal units.

Derivative Instruments (Tables)

Derivative Instruments (Tables) - Southern California Edison	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Derivative Instruments	The following table summarizes the gross and net fair values of SCE's commodity derivative instruments: March 31, 2016 Derivative Assets Derivative Liabilities Net (in millions) Short-Term Long-Term Subtotal Short-Term Long-Term Subtotal Commodity derivative contracts Gross amounts recognized $ 66 $ 78 $ 144 $ 244 $ 1,134 $ 1,378 $ 1,234 Gross amounts offset in the consolidated balance sheets (1 ) — (1 ) (1 ) — (1 ) — Cash collateral posted 1 — — — (11 ) — (11 ) (11 ) Net amounts presented in the consolidated balance sheets $ 65 $ 78 $ 143 $ 232 $ 1,134 $ 1,366 $ 1,223 December 31, 2015 Derivative Assets Derivative Liabilities Net (in millions) Short-Term Long-Term Subtotal Short-Term Long-Term Subtotal Commodity derivative contracts Gross amounts recognized $ 81 $ 84 $ 165 $ 235 $ 1,100 $ 1,335 $ 1,170 Gross amounts offset in the consolidated balance sheets (2 ) — (2 ) (2 ) — (2 ) — Cash collateral posted 1 — — — (15 ) — (15 ) (15 ) Net amounts presented in the consolidated balance sheets $ 79 $ 84 $ 163 $ 218 $ 1,100 $ 1,318 $ 1,155 1 In addition, at March 31, 2016 and December 31, 2015 , SCE had posted $25 million and $31 million , respectively, of collateral that is not offset against derivative liabilities and is reflected in "Other current assets" on the consolidated balance sheets.
Summarization of Economic Hedging Activities	The following table summarizes the components of SCE's economic hedging activity: Three months ended March 31, (in millions) 2016 2015 Realized losses $ (27 ) $ (36 ) Unrealized losses (64 ) (69 )
Notional Volumes of Derivative Instruments	The following table summarizes the notional volumes of derivatives used for SCE hedging activities: Economic Hedges Commodity Unit of Measure March 31, 2016 December 31, 2015 Electricity options, swaps and forwards GWh 4,842 6,221 Natural gas options, swaps and forwards Bcf 17 32 Congestion revenue rights GWh 96,182 109,740 Tolling arrangements GWh 68,331 70,663

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Reconciliation of income tax expense	The table below provides a reconciliation of income tax expense computed at the federal statutory income tax rate to the income tax provision: Edison International SCE Three months ended March 31, (in millions) 2016 2015 2016 2015 Income from continuing operations before income taxes $ 333 $ 424 $ 367 $ 440 Provision for income tax at federal statutory rate of 35% 117 148 128 154 Increase in income tax from: State tax, net of federal benefit 6 11 9 14 Property-related (79 ) (60 ) (79 ) (60 ) Change related to uncertain tax positions (1 ) 15 (1 ) 10 Other (5 ) (8 ) (7 ) (11 ) Total income tax expense from continuing operations $ 38 $ 106 $ 50 $ 107 Effective tax rate 11.4 % 25.0 % 13.6 % 24.3 %

Compensation and Benefit Plans

Compensation and Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2016
Pension Plans
Pension and Other Postretirement Benefits
Expense Components for Plans	Pension expense components for continuing operations are: Edison International SCE Three months ended March 31, (in millions) 2016 2015 2016 2015 Service cost $ 39 $ 35 $ 38 $ 35 Interest cost 44 41 41 38 Expected return on plan assets (56 ) (57 ) (53 ) (53 ) Amortization of prior service cost 1 1 1 1 Amortization of net loss 1 9 9 8 7 Expense under accounting standards $ 37 $ 29 $ 35 $ 28 Regulatory adjustment (9 ) (1 ) (9 ) (1 ) Total expense recognized $ 28 $ 28 $ 26 $ 27 1 Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International and SCE was $3 million and $2 million , respectively, for the three months ended March 31, 2016 , and $3 million and $2 million , respectively, for the three months ended March 31, 2015 .
Postretirement Benefits Other Than Pensions
Pension and Other Postretirement Benefits
Expense Components for Plans	PBOP expense components for continuing operations are: Edison International SCE Three months ended March 31, (in millions) 2016 2015 2016 2015 Service cost $ 10 $ 12 $ 10 $ 12 Interest cost 26 29 26 28 Expected return on plan assets (28 ) (28 ) (28 ) (28 ) Amortization of prior service cost (1 ) (3 ) (1 ) (3 ) Amortization of net loss — 6 — 6 Total expense $ 7 $ 16 $ 7 $ 15
Southern California Edison
Workforce Reductions [Abstract]
Workforce reductions	The following table provides a summary of changes in the accrued severance liability associated with these reductions: (in millions) Balance at January 1, 2016 $ 22 Additions 5 Payments (15 ) Balance at March 31, 2016 $ 12

Investments (Tables)

Investments (Tables) - Southern California Edison	3 Months Ended
	Mar. 31, 2016
Investment [Line Items]
Amortized Cost and Fair Value of the Trust Investments	The following table sets forth amortized cost and fair value of the trust investments (see Note 4 for a discussion of fair value of the trust investments): Longest Maturity Dates Amortized Cost Fair Value (in millions) March 31, December 31, March 31, December 31, 2015 Stocks — $ 311 $ 304 $ 1,464 $ 1,460 Municipal bonds 2054 736 691 894 840 U.S. government and agency securities 2046 1,002 1,070 1,092 1,128 Corporate bonds 2057 662 708 731 755 Short-term investments and receivables/payables 1 One-year 106 144 109 148 Total $ 2,817 $ 2,917 $ 4,290 $ 4,331 1 Short-term investments include $8 million and $81 million of repurchase agreements payable by financial institutions which earn interest, are fully secured by U.S. Treasury securities and mature by April 4, 2016 and January 5, 2016 as of March 31, 2016 and December 31, 2015 , respectively.
Summary of Changes in the Fair Value of Trust	The following table sets forth a summary of changes in the fair value of the trust: Three months ended March 31, (in millions) 2016 2015 Balance at beginning of period $ 4,331 $ 4,799 Gross realized gains 17 27 Gross realized losses (3 ) (2 ) Unrealized gains, net 59 44 Other-than-temporary impairments (7 ) (4 ) Interest and dividends 29 28 Contributions — 7 Income taxes (18 ) — Decommissioning disbursements (116 ) — Administrative expenses and other (2 ) (3 ) Balance at end of period $ 4,290 $ 4,896

Regulatory Assets and Liabili32

Regulatory Assets and Liabilities (Tables) - Southern California Edison	3 Months Ended
	Mar. 31, 2016
Regulatory Assets [Line Items]
Regulatory Assets Included on the Consolidated Balance Sheets	SCE's regulatory assets included on the consolidated balance sheets are: (in millions) March 31, December 31, Current: Regulatory balancing accounts $ 329 $ 382 Energy derivatives 182 159 Other 27 19 Total current 538 560 Long-term: Deferred income taxes, net 3,920 3,757 Pensions and other postretirement benefits 842 849 Energy derivatives 1,066 1,027 Unamortized investments, net 169 182 San Onofre 982 1,043 Unamortized loss on reacquired debt 197 201 Regulatory balancing accounts 39 36 Environmental remediation 131 129 Other 282 288 Total long-term 7,628 7,512 Total regulatory assets $ 8,166 $ 8,072
Regulatory Liabilities Included on the Consolidated Balance Sheets	SCE's regulatory liabilities included on the consolidated balance sheets are: (in millions) March 31, December 31, Current: Regulatory balancing accounts $ 1,135 $ 1,106 Other 22 22 Total current 1,157 1,128 Long-term: Costs of removal 2,822 2,781 Recoveries in excess of ARO liabilities 1 1,690 1,502 Regulatory balancing accounts 1,352 1,314 Other 56 79 Total long-term 5,920 5,676 Total regulatory liabilities $ 7,077 $ 6,804 1 Represents the cumulative differences between ARO expenses and amounts collected in rates primarily for the decommissioning of the SCE's nuclear generation facilities. Decommissioning costs recovered through rates are primarily placed in nuclear decommissioning trusts. This regulatory liability also represents the deferral of realized and unrealized gains and losses on the nuclear decommissioning trust investments. See Note 9.
Schedule of Regulatory Balancing Accounts	The following table summarizes the significant components of regulatory balancing accounts included in the above tables of regulatory assets and liabilities: (in millions) March 31, December 31, Asset (liability) Energy resource recovery account $ (364 ) $ (439 ) New system generation balancing account (189 ) (171 ) Public purpose programs and energy efficiency programs (817 ) (683 ) Tax accounting memorandum account and pole loading balancing account (278 ) (248 ) Base rate recovery balancing account (234 ) (319 ) Greenhouse gas auction revenue (156 ) (75 ) FERC balancing accounts 43 74 Generator settlements — (4 ) Other (124 ) (137 ) Liability $ (2,119 ) $ (2,002 )

Accumulated Other Comprehensi33

Accumulated Other Comprehensive Loss (Tables)	3 Months Ended
	Mar. 31, 2016
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Components of Accumulated Other Comprehensive Loss	Edison International's accumulated other comprehensive loss, net of tax consist of: Edison International SCE Three months ended March 31, (in millions) 2016 2015 2016 2015 Beginning balance $ (56 ) $ (58 ) $ (22 ) $ (28 ) Pension and PBOP – net loss: Other comprehensive loss before reclassifications — (3 ) — — Reclassified from accumulated other comprehensive loss 1 2 2 1 1 Change 2 (1 ) 1 1 Ending Balance $ (54 ) $ (59 ) $ (21 ) $ (27 ) 1 These items are included in the computation of net periodic pension and PBOP expense. See Note 8 for additional information.

Interest and Other Income and34

Interest and Other Income and Other Expenses (Tables)	3 Months Ended
	Mar. 31, 2016
Other Income and Expenses [Abstract]
Interest and Other Income and Expenses	Interest and other income and other expenses are as follows: Three months ended March 31, (in millions) 2016 2015 SCE interest and other income: Equity allowance for funds used during construction $ 22 $ 21 Increase in cash surrender value of life insurance policies and life insurance benefits 7 10 Interest income — 1 Other 2 1 Total SCE interest and other income 31 33 Other income of Edison International Parent and Other — 6 Total Edison International interest and other income $ 31 $ 39 SCE other expenses: Civic, political and related activities and donations $ (5 ) $ (5 ) Other — (2 ) Total SCE other expenses (5 ) (7 ) Other expense of Edison International Parent and Other (1 ) (3 ) Total Edison International other expenses $ (6 ) $ (10 )

Supplemental Cash Flows Infor35

Supplemental Cash Flows Information (Tables)	3 Months Ended
	Mar. 31, 2016
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flows Information	Supplemental cash flows information for continuing operations is: Edison International SCE Three months ended March 31, (in millions) 2016 2015 2016 2015 Cash payments for interest and taxes: Interest, net of amounts capitalized $ 158 $ 152 $ 149 $ 144 Tax payments, net 2 — 11 32 Non-cash financing and investing activities: Dividends declared but not paid: Common stock $ 156 $ 136 $ — $ 147 Preferred and preference stock 1 3 1 3

Summary of Significant Accoun36

Summary of Significant Accounting Policies (Details) mi² in Thousands	3 Months Ended
	Mar. 31, 2016mi²
Southern California Edison | Electric Utility
Summary of Significant Accounting Policies [Line Items]
Supply of electricity, area covered (square mile)	50

Summary of Significant Accoun37

Summary of Significant Accounting Policies (Cash) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Cash and Cash Equivalents Items [Line Items]
Maximum maturity period of cash equivalent investments (in months)	3 months
Money market funds	$ 36	$ 37
Book balances reclassified to accounts payable	102	162
Southern California Edison
Cash and Cash Equivalents Items [Line Items]
Money market funds	7	8
Book balances reclassified to accounts payable	$ 102	$ 158

Summary of Significant Accoun38

Summary of Significant Accounting Policies (Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Basic earnings per share – continuing operations:
Income from continuing operations attributable to common shareholders	$ 270	$ 299
Participating securities dividends	0	0
Income from continuing operations available to common shareholders	$ 270	$ 299
Weighted average common shares outstanding (in shares)	326,000,000	326,000,000
Basic earnings per share – continuing operations (in dollars per share)	$ 0.83	$ 0.92
Diluted earnings per share – continuing operations:
Income from continuing operations available to common shareholders	$ 270	$ 299
Income impact of assumed conversions	0	0
Income from continuing operations available to common shareholders and assumed conversions	$ 270	$ 299
Weighted average common shares outstanding (in shares)	326,000,000	326,000,000
Incremental shares from assumed conversions (in shares)	2,000,000	3,000,000
Adjusted weighted average shares - diluted (in shares)	328,000,000	329,000,000
Diluted earnings per share – continuing operations (in dollars per share)	$ 0.82	$ 0.91
Stock-Based Compensation Awards
Diluted earnings per share – continuing operations:
Stock-based compensation awards excluded from the computation of diluted earnings per share (in shares)	2,023,787	79,394

Summary of Significant Accoun39

Summary of Significant Accounting Policies (New Accounting Guidance) (Details) - Accounting Standards Update 2015-03 - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Long-term debt
Debt issuance costs	$ 83
Other long-term assets
Debt issuance costs		$ 81
Southern California Edison | Long-term debt
Debt issuance costs	$ 76
Southern California Edison | Other long-term assets
Debt issuance costs		$ 77

Consolidated Statements of Ch40

Consolidated Statements of Changes in Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, at the beginning of the period	$ 13,388	$ 12,982
Net income	301	327
Other comprehensive income	2	(1)
Common stock dividends declared	(156)	(136)
Dividends to noncontrolling interests	(30)	(28)
Stock-based compensation	(49)	(52)
Non-cash stock-based compensation	6	6
Issuance of preference stock	294
Redemption of preference stock	(125)
Balance, at the end of the period	$ 13,631	$ 13,098
Dividends declared per common share (in dollars per share)	$ 0.4800	$ 0.4175
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, at the beginning of the period	$ 2,484	$ 2,445
Net income	0	0
Other comprehensive income	0	0
Common stock dividends declared	0	0
Dividends to noncontrolling interests	0	0
Stock-based compensation	1	9
Non-cash stock-based compensation	6	6
Issuance of preference stock	0
Redemption of preference stock	0
Balance, at the end of the period	2,491	2,460
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, at the beginning of the period	(56)	(58)
Net income	0	0
Other comprehensive income	2	(1)
Common stock dividends declared	0	0
Dividends to noncontrolling interests	0	0
Stock-based compensation	0	0
Non-cash stock-based compensation	0	0
Issuance of preference stock	0
Redemption of preference stock	0
Balance, at the end of the period	(54)	(59)
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, at the beginning of the period	8,940	8,573
Net income	271	299
Other comprehensive income	0	0
Common stock dividends declared	(156)	(136)
Dividends to noncontrolling interests	0	0
Stock-based compensation	(50)	(61)
Non-cash stock-based compensation	0	0
Issuance of preference stock	0
Redemption of preference stock	(3)
Balance, at the end of the period	9,002	8,675
Subtotal
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, at the beginning of the period	11,368	10,960
Net income	271	299
Other comprehensive income	2	(1)
Common stock dividends declared	(156)	(136)
Dividends to noncontrolling interests	0	0
Stock-based compensation	(49)	(52)
Non-cash stock-based compensation	6	6
Issuance of preference stock	0
Redemption of preference stock	(3)
Balance, at the end of the period	11,439	11,076
Preferred and preference stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, at the beginning of the period	2,020	2,022
Net income	30	28
Other comprehensive income	0	0
Common stock dividends declared	0	0
Dividends to noncontrolling interests	(30)	(28)
Stock-based compensation	0	0
Non-cash stock-based compensation	0	0
Issuance of preference stock	294
Redemption of preference stock	(122)
Balance, at the end of the period	2,192	2,022
Southern California Edison
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, at the beginning of the period	13,672	13,282
Net income	317	333
Other comprehensive income	1	1
Common stock dividends declared	(170)	(147)
Dividends declared on preferred and preference stock	(30)	(28)
Stock-based compensation	(33)	(13)
Non-cash stock-based compensation	3	4
Issuance of preference stock	294
Redemption of preference stock	(125)
Balance, at the end of the period	13,929	13,432
Southern California Edison | Common stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, at the beginning of the period	2,168	2,168
Net income	0	0
Other comprehensive income	0	0
Common stock dividends declared	0	0
Dividends declared on preferred and preference stock	0	0
Stock-based compensation	0	0
Non-cash stock-based compensation	0	0
Issuance of preference stock	0
Redemption of preference stock	0
Balance, at the end of the period	2,168	2,168
Southern California Edison | Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, at the beginning of the period	652	618
Net income	0	0
Other comprehensive income	0	0
Common stock dividends declared	0	0
Dividends declared on preferred and preference stock	0	0
Stock-based compensation	1	9
Non-cash stock-based compensation	3	4
Issuance of preference stock	(6)
Redemption of preference stock	3
Balance, at the end of the period	653	631
Southern California Edison | Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, at the beginning of the period	(22)	(28)
Net income	0	0
Other comprehensive income	1	1
Common stock dividends declared	0	0
Dividends declared on preferred and preference stock	0	0
Stock-based compensation	0	0
Non-cash stock-based compensation	0	0
Issuance of preference stock	0
Redemption of preference stock	0
Balance, at the end of the period	(21)	(27)
Southern California Edison | Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, at the beginning of the period	8,804	8,454
Net income	317	333
Other comprehensive income	0	0
Common stock dividends declared	(170)	(147)
Dividends declared on preferred and preference stock	(30)	(28)
Stock-based compensation	(34)	(22)
Non-cash stock-based compensation	0	0
Issuance of preference stock	0
Redemption of preference stock	(3)
Balance, at the end of the period	8,884	8,590
Southern California Edison | Preferred and preference stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, at the beginning of the period	2,070	2,070
Other comprehensive income	0	0
Common stock dividends declared	0	0
Dividends declared on preferred and preference stock	0	0
Stock-based compensation	0	0
Non-cash stock-based compensation	0	0
Issuance of preference stock	300
Redemption of preference stock	(125)
Balance, at the end of the period	$ 2,245	$ 2,070

Variable Interest Entities (Det

Variable Interest Entities (Details) - Southern California Edison	3 Months Ended		12 Months Ended
	Mar. 31, 2016USD ($)$ / sharesMW	Mar. 31, 2015USD ($)MW	Dec. 31, 2015USD ($)$ / shares
Series K Preferred Stock
Unconsolidated Trust
Security dividend rate, (as a percent)	5.45%
Liquidation value (in dollars per share) | $ / shares	$ 2,500
Variable Interest Entity, Not Primary Beneficiary | SCE Power Purchase Contracts
Details of projects or entities
Power generating capacity (in megawatts) | MW	4,383	4,125
Payments to unconsolidated VIEs for power purchase contracts	$ 127,000,000	$ 103,000,000
Variable Interest Entity, Not Primary Beneficiary | SCE Trust I
Unconsolidated Trust
Common stock	10,000		$ 10,000
Dividend income	7,000,000	7,000,000
Dividend distributions	$ 7,000,000	7,000,000
Variable Interest Entity, Not Primary Beneficiary | SCE Trust I | Trust Securities [Member]
Unconsolidated Trust
Security dividend rate, (as a percent)	5.625%		5.625%
Liquidation preference	$ 475,000,000		$ 475,000,000
Liquidation value (in dollars per share) | $ / shares	$ 25		$ 25
Common stock	$ 10,000
Variable Interest Entity, Not Primary Beneficiary | SCE Trust I | Series F Preferred Stock
Unconsolidated Trust
Security dividend rate, (as a percent)	5.625%		5.625%
Liquidation preference	$ 475,000,000		$ 475,000,000
Liquidation value (in dollars per share) | $ / shares	$ 2,500		$ 2,500
Variable Interest Entity, Not Primary Beneficiary | SCE Trust II
Unconsolidated Trust
Common stock	$ 10,000		$ 10,000
Dividend income	5,000,000	5,000,000
Dividend distributions	$ 5,000,000	5,000,000
Variable Interest Entity, Not Primary Beneficiary | SCE Trust II | Trust Securities [Member]
Unconsolidated Trust
Security dividend rate, (as a percent)	5.10%		5.10%
Liquidation preference	$ 400,000,000		$ 400,000,000
Liquidation value (in dollars per share) | $ / shares	$ 25		$ 25
Variable Interest Entity, Not Primary Beneficiary | SCE Trust II | Series G Preferred Stock
Unconsolidated Trust
Security dividend rate, (as a percent)	5.10%		5.10%
Liquidation preference	$ 400,000,000		$ 400,000,000
Liquidation value (in dollars per share) | $ / shares	$ 2,500		$ 2,500
Variable Interest Entity, Not Primary Beneficiary | SCE Trust III
Unconsolidated Trust
Common stock	$ 10,000		$ 10,000
Dividend income	4,000,000	4,000,000
Dividend distributions	$ 4,000,000	$ 4,000,000
Variable Interest Entity, Not Primary Beneficiary | SCE Trust III | Trust Securities [Member]
Unconsolidated Trust
Security dividend rate, (as a percent)	5.75%		5.75%
Liquidation preference	$ 275,000,000		$ 275,000,000
Liquidation value (in dollars per share) | $ / shares	$ 25		$ 25
Variable Interest Entity, Not Primary Beneficiary | SCE Trust III | Series H Preferred Stock
Unconsolidated Trust
Security dividend rate, (as a percent)	5.75%		5.75%
Liquidation preference	$ 275,000,000		$ 275,000,000
Liquidation value (in dollars per share) | $ / shares	$ 2,500		$ 2,500
Variable Interest Entity, Not Primary Beneficiary | SCE Trust IV
Unconsolidated Trust
Common stock	$ 10,000		$ 10,000
Dividend income	4,000,000
Dividend distributions	$ 4,000,000
Variable Interest Entity, Not Primary Beneficiary | SCE Trust IV | Trust Securities [Member]
Unconsolidated Trust
Security dividend rate, (as a percent)	5.375%		5.375%
Liquidation preference	$ 325,000,000		$ 325,000,000
Liquidation value (in dollars per share) | $ / shares	$ 25		$ 25
Variable Interest Entity, Not Primary Beneficiary | SCE Trust IV | Series J Preferred Stock
Unconsolidated Trust
Security dividend rate, (as a percent)	5.375%		5.375%
Liquidation preference	$ 325,000,000		$ 325,000,000
Liquidation value (in dollars per share) | $ / shares	$ 2,500		$ 2,500
Variable Interest Entity, Not Primary Beneficiary | SCE Trust V
Unconsolidated Trust
Common stock	$ 10,000
Dividend income	1,000,000
Dividend distributions	$ 1,000,000
Variable Interest Entity, Not Primary Beneficiary | SCE Trust V | Trust Securities [Member]
Unconsolidated Trust
Security dividend rate, (as a percent)	5.45%
Liquidation preference	$ 300,000,000
Liquidation value (in dollars per share) | $ / shares	$ 25
Common stock	$ 10,000
Variable Interest Entity, Not Primary Beneficiary | SCE Trust V | Series K Preferred Stock
Unconsolidated Trust
Security dividend rate, (as a percent)	5.45%
Liquidation preference	$ 300,000,000
Liquidation value (in dollars per share) | $ / shares	$ 2,500

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value by Level) (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Assets and Liabilities at Fair Values
Money market funds	$ 36	$ 37
Assets at fair value
Nuclear decommissioning trusts	4,290	4,331
Level 1
Assets and Liabilities at Fair Values
Money market funds	30	29
Southern California Edison
Assets and Liabilities at Fair Values
Money market funds	7	8
Assets at fair value
Nuclear decommissioning trusts	$ 4,290	$ 4,331	$ 4,896	$ 4,799
Liabilities at fair value
Percentage of equity investments located in the United States (as a percent)	70.00%	70.00%
Collateralized mortgage obligations and other asset backed securities	$ 101	$ 111
Payables, net, related to investments	8	24
Southern California Edison | Fair Value, Measurements, Recurring | Level 1
Assets at fair value
Derivative contracts	0	0
Other	28	28
Nuclear decommissioning trusts	2,440	2,498
Total assets	2,468	2,526
Liabilities at fair value
Derivative contracts	0	0
Total liabilities	0	0
Net assets (liabilities)	2,468	2,526
Southern California Edison | Fair Value, Measurements, Recurring | Level 1 | Stocks
Assets at fair value
Nuclear decommissioning trusts	1,464	1,460
Southern California Edison | Fair Value, Measurements, Recurring | Level 1 | Fixed income
Assets at fair value
Nuclear decommissioning trusts	907	947
Southern California Edison | Fair Value, Measurements, Recurring | Level 1 | Short-term investments, primarily cash equivalents
Assets at fair value
Nuclear decommissioning trusts	69	91
Southern California Edison | Fair Value, Measurements, Recurring | Level 2
Assets at fair value
Derivative contracts	0	0
Other	0	0
Nuclear decommissioning trusts	1,858	1,857
Total assets	1,858	1,857
Liabilities at fair value
Derivative contracts	21	22
Total liabilities	21	22
Net assets (liabilities)	1,837	1,835
Southern California Edison | Fair Value, Measurements, Recurring | Level 2 | Stocks
Assets at fair value
Nuclear decommissioning trusts	0	0
Southern California Edison | Fair Value, Measurements, Recurring | Level 2 | Fixed income
Assets at fair value
Nuclear decommissioning trusts	1,810	1,776
Southern California Edison | Fair Value, Measurements, Recurring | Level 2 | Short-term investments, primarily cash equivalents
Assets at fair value
Nuclear decommissioning trusts	48	81
Southern California Edison | Fair Value, Measurements, Recurring | Level 3
Assets at fair value
Derivative contracts	143	163
Other	0	0
Nuclear decommissioning trusts	0	0
Total assets	143	163
Liabilities at fair value
Derivative contracts	1,356	1,311
Total liabilities	1,356	1,311
Net assets (liabilities)	(1,213)	(1,148)
Southern California Edison | Fair Value, Measurements, Recurring | Level 3 | Stocks
Assets at fair value
Nuclear decommissioning trusts	0	0
Southern California Edison | Fair Value, Measurements, Recurring | Level 3 | Fixed income
Assets at fair value
Nuclear decommissioning trusts	0	0
Southern California Edison | Fair Value, Measurements, Recurring | Level 3 | Short-term investments, primarily cash equivalents
Assets at fair value
Nuclear decommissioning trusts	0	0
Southern California Edison | Fair Value, Measurements, Recurring | Gross amounts offset in the consolidated balance sheets
Assets at fair value
Derivative contracts	0	0
Other	0	0
Nuclear decommissioning trusts	0	0
Total assets	0	0
Liabilities at fair value
Derivative contracts	(11)	(15)
Total liabilities	(11)	(15)
Net assets (liabilities)	11	15
Southern California Edison | Fair Value, Measurements, Recurring | Gross amounts offset in the consolidated balance sheets | Stocks
Assets at fair value
Nuclear decommissioning trusts	0	0
Southern California Edison | Fair Value, Measurements, Recurring | Gross amounts offset in the consolidated balance sheets | Fixed income
Assets at fair value
Nuclear decommissioning trusts	0	0
Southern California Edison | Fair Value, Measurements, Recurring | Gross amounts offset in the consolidated balance sheets | Short-term investments, primarily cash equivalents
Assets at fair value
Nuclear decommissioning trusts	0	0
Southern California Edison | Fair Value, Measurements, Recurring | Total
Assets at fair value
Derivative contracts	143	163
Other	28	28
Nuclear decommissioning trusts	4,298	4,355
Total assets	4,469	4,546
Liabilities at fair value
Derivative contracts	1,366	1,318
Total liabilities	1,366	1,318
Net assets (liabilities)	3,103	3,228
Southern California Edison | Fair Value, Measurements, Recurring | Total | Stocks
Assets at fair value
Nuclear decommissioning trusts	1,464	1,460
Southern California Edison | Fair Value, Measurements, Recurring | Total | Fixed income
Assets at fair value
Nuclear decommissioning trusts	2,717	2,723
Southern California Edison | Fair Value, Measurements, Recurring | Total | Short-term investments, primarily cash equivalents
Assets at fair value
Nuclear decommissioning trusts	$ 117	$ 172

Fair Value Measurements (Level

Fair Value Measurements (Level 3 Rollforward) (Details) - Southern California Edison - Level 3 - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Fair Value Disclosures Level 3 [Roll Forward]
Fair value of net liabilities at beginning of period	$ (1,148)	$ (902)
Total realized/unrealized gains (losses):
Included in regulatory assets and liabilities	(65)	(74)
Fair value of net liabilities at end of period	(1,213)	(976)
Change during the period in unrealized losses related to assets and liabilities held at the end of the period	$ (84)	$ (96)

Fair Value Measurements (Quanti

Fair Value Measurements (Quantitative Information About Level 3 Fair Value Measurements) (Details) - Southern California Edison - Level 3 $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016USD ($)$ / MWh$ / MMBTUMW	Dec. 31, 2015USD ($)$ / MWh$ / MMBTUMW
Congestion revenue rights | Market simulation model and auction prices
Quantitative Information About Level 3 Measurements [Line Items]
Fair Value, Assets | $	$ 136	$ 152
Fair Value, Liabilities | $	$ 0	$ 0
Congestion revenue rights | Market simulation model and auction prices | Load Forecast | Minimum
Quantitative Information About Level 3 Measurements [Line Items]
Fair value inputs, power units (in megawatts) | MW	6,289	6,289
Congestion revenue rights | Market simulation model and auction prices | Load Forecast | Maximum
Quantitative Information About Level 3 Measurements [Line Items]
Fair value inputs, power units (in megawatts) | MW	24,349	24,349
Congestion revenue rights | Market simulation model and auction prices | Power Prices | Minimum
Quantitative Information About Level 3 Measurements [Line Items]
Fair value inputs, price level ($ per MWh)	0	0
Congestion revenue rights | Market simulation model and auction prices | Power Prices | Maximum
Quantitative Information About Level 3 Measurements [Line Items]
Fair value inputs, price level ($ per MWh)	110.44	110.44
Congestion revenue rights | Market simulation model and auction prices | Gas Prices | Minimum
Quantitative Information About Level 3 Measurements [Line Items]
Fair value inputs, price level ($ per MWh) | $ / MMBTU	1.98	1.98
Congestion revenue rights | Market simulation model and auction prices | Gas Prices | Maximum
Quantitative Information About Level 3 Measurements [Line Items]
Fair value inputs, price level ($ per MWh) | $ / MMBTU	5.72	5.72
Tolling | Option model
Quantitative Information About Level 3 Measurements [Line Items]
Fair Value, Assets | $	$ 7	$ 10
Fair Value, Liabilities | $	$ 1,329	$ 1,297
Tolling | Option model | Power Prices | Minimum
Quantitative Information About Level 3 Measurements [Line Items]
Fair value inputs, price level ($ per MWh)	17.67	24.15
Expected volatility rate (as a percent)	26.00%	26.00%
Tolling | Option model | Power Prices | Maximum
Quantitative Information About Level 3 Measurements [Line Items]
Fair value inputs, price level ($ per MWh)	47.29	46.93
Expected volatility rate (as a percent)	86.00%	38.00%
Tolling | Option model | Power Prices | Weighted Average
Quantitative Information About Level 3 Measurements [Line Items]
Fair value inputs, price level ($ per MWh)	33	34.80
Expected volatility rate (as a percent)	40.00%	30.00%
Tolling | Option model | Gas Prices | Minimum
Quantitative Information About Level 3 Measurements [Line Items]
Expected volatility rate (as a percent)	16.00%	15.00%
Tolling | Option model | Gas Prices | Maximum
Quantitative Information About Level 3 Measurements [Line Items]
Expected volatility rate (as a percent)	46.00%	58.00%
Tolling | Option model | Gas Prices | Weighted Average
Quantitative Information About Level 3 Measurements [Line Items]
Expected volatility rate (as a percent)	30.00%	20.00%

Fair Value Measurements (Fair45

Fair Value Measurements (Fair Value of Long-Term Debt Recorded at Carrying Value) (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Fair Value of Long-Term Debt Recorded at Carrying Value
Carrying Value	$ 11,538	$ 11,259
Fair Value	13,109	12,252
Southern California Edison
Fair Value of Long-Term Debt Recorded at Carrying Value
Carrying Value	10,501	10,616
Fair Value	$ 12,045	$ 11,592

Debt and Credit Agreements (Det

Debt and Credit Agreements (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Short-term debt	$ 363,000,000	$ 695,000,000
Southern California Edison
Debt Instrument [Line Items]
Short-term debt	101,000,000	$ 49,000,000
Edison International Parent and Other | Credit Facility July 2020
Debt Instrument [Line Items]
Commitment	$ 1,250,000,000
Weighted average interest rate (percentage)	0.69%	0.78%
Short-term debt	$ 262,000,000	$ 646,000,000
Commercial paper | Southern California Edison | Credit Facility July 2020
Debt Instrument [Line Items]
Commitment	2,750,000,000
Outstanding borrowings	$ 101,000,000	$ 49,000,000
Weighted average interest rate (percentage)	0.45%	0.51%
Letters of credit | Southern California Edison | Credit Facility July 2020
Debt Instrument [Line Items]
Outstanding letters of credit	$ 94,000,000
Letters of credit expiration period	12 months
Senior Notes | 2.95% Senior Notes Due 2023
Debt Instrument [Line Items]
Issuance of debt	$ 400,000,000
Stated interest rate	2.95%

Derivative Instruments (Additio

Derivative Instruments (Additional Disclosures) (Details) - Southern California Edison - Electric Utility - Economic hedges - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Derivatives
Aggregate fair value of all derivative liabilities with credit-risk-related contingent features	$ 50,000,000		$ 38,000,000
Collateral already posted	12,000,000		$ 0
Potential amount of collateral to be posted if contingencies triggered	31,000,000
Realized losses	(27,000,000)	$ (36,000,000)
Unrealized losses	(64,000,000)	$ (69,000,000)
Payables
Derivatives
Potential amount of collateral to be posted if contingencies triggered	$ 3,000,000

Derivative Instruments (Balance

Derivative Instruments (Balance Sheet Disclosures) (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Fair Value of Derivative Instruments
Short-Term, Derivative Assets	$ 65,000,000	$ 79,000,000
Long-Term, Derivative Assets	78,000,000	84,000,000
Short-Term, Derivative Liabilities	232,000,000	218,000,000
Long-Term, Derivative Liabilities	1,136,000,000	1,100,000,000
Southern California Edison
Fair Value of Derivative Instruments
Short-Term, Derivative Assets	65,000,000	79,000,000
Long-Term, Derivative Assets	78,000,000	84,000,000
Short-Term, Derivative Liabilities	232,000,000	218,000,000
Long-Term, Derivative Liabilities	1,134,000,000	1,100,000,000
Southern California Edison | Electric Utility | Gross amounts recognized
Derivatives
Collateral already posted	12,000,000	0
Southern California Edison | Commodity Contracts | Electric Utility
Fair Value of Derivative Instruments
Short-Term, Derivative Assets	65,000,000	79,000,000
Long-Term, Derivative Assets	78,000,000	84,000,000
Derivative Assets, Total	143,000,000	163,000,000
Short-Term, Derivative Liabilities	232,000,000	218,000,000
Long-Term, Derivative Liabilities	1,134,000,000	1,100,000,000
Derivative Liabilities, Total	1,366,000,000	1,318,000,000
Net Liability	1,223,000,000	1,155,000,000
Southern California Edison | Commodity Contracts | Electric Utility | Gross amounts recognized
Fair Value of Derivative Instruments
Short-Term, Derivative Assets	66,000,000	81,000,000
Long-Term, Derivative Assets	78,000,000	84,000,000
Derivative Assets, Total	144,000,000	165,000,000
Short-Term, Derivative Liabilities	244,000,000	235,000,000
Long-Term, Derivative Liabilities	1,134,000,000	1,100,000,000
Derivative Liabilities, Total	1,378,000,000	1,335,000,000
Net Liability	1,234,000,000	1,170,000,000
Southern California Edison | Commodity Contracts | Electric Utility | Gross amounts offset in the consolidated balance sheets
Fair Value of Derivative Instruments
Short-Term, Derivative Assets	(1,000,000)	(2,000,000)
Long-Term, Derivative Assets	0	0
Derivative Assets, Total	(1,000,000)	(2,000,000)
Short-Term, Derivative Liabilities	(1,000,000)	(2,000,000)
Long-Term, Derivative Liabilities	0	0
Derivative Liabilities, Total	(1,000,000)	(2,000,000)
Net Liability	0	0
Southern California Edison | Commodity Contracts | Electric Utility | Cash collateral posted
Fair Value of Derivative Instruments
Short-Term, Derivative Assets	0	0
Long-Term, Derivative Assets	0	0
Derivative Assets, Total	0	0
Short-Term, Derivative Liabilities	(11,000,000)	(15,000,000)
Long-Term, Derivative Liabilities	0	0
Derivative Liabilities, Total	(11,000,000)	(15,000,000)
Net Liability	(11,000,000)	(15,000,000)
Other current assets | Southern California Edison | Commodity Contracts
Derivatives
Collateral already posted	$ 25,000,000	$ 31,000,000

Derivative Instruments (Notiona

Derivative Instruments (Notional Values) (Details) - Southern California Edison - Electric Utility - Economic hedges GWh in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016BcfeGWh	Dec. 31, 2015BcfeGWh
Electricity options, swaps and forwards (GWh)
Derivatives
Notional volumes of derivative instruments	4,842	6,221
Natural gas options, swaps and forwards (Bcf)
Derivatives
Notional volumes of derivative instruments | Bcfe	17	32
Congestion revenue rights (GWh)
Derivatives
Notional volumes of derivative instruments	96,182	109,740
Tolling arrangements (GWh)
Derivatives
Notional volumes of derivative instruments	68,331	70,663

Income Taxes (Tax Rate Reconcil

Income Taxes (Tax Rate Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Effective Tax Rate
Income from continuing operations before income taxes	$ 333	$ 424
Provision for income tax at federal statutory rate of 35%	117	148
State tax, net of federal benefit	6	11
Property-related	(79)	(60)
Change related to uncertain tax positions	(1)	15
Other	(5)	(8)
Total income tax expense from continuing operations	$ 38	$ 106
Effective tax rate	11.40%	25.00%
Federal statutory rate	35.00%
Southern California Edison
Effective Tax Rate
Income from continuing operations before income taxes	$ 367	$ 440
Provision for income tax at federal statutory rate of 35%	128	154
State tax, net of federal benefit	9	14
Property-related	(79)	(60)
Change related to uncertain tax positions	(1)	10
Other	(7)	(11)
Total income tax expense from continuing operations	$ 50	$ 107
Effective tax rate	13.60%	24.30%
Federal statutory rate	35.00%

Income Taxes (Textual) (Details

Income Taxes (Textual) (Details) - IRS Examination - Disallowance of Repair Allowance Deduction - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Jun. 30, 2015
Tax Years 2010 to 2012
Income Tax Disclosure [Line Items]
Tax liability		$ 94
Southern California Edison | Tax Years 2007 to 2009
Income Tax Disclosure [Line Items]
Tax liability	$ 64
Southern California Edison | Tax Years 2010 to 2012
Income Tax Disclosure [Line Items]
Tax liability		$ 100
Southern California Edison | Tax Years 2010 to 2012, Federal [Member]
Income Tax Disclosure [Line Items]
Tax liability	$ (9)

Compensation and Benefit Plan52

Compensation and Benefit Plans (Expense Components) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Pension Plans
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 39	$ 35
Interest cost	44	41
Expected return on plan assets	(56)	(57)
Amortization of prior service cost	1	1
Amortization of net loss	9	9
Expense under accounting standards	37	29
Regulatory adjustment	(9)	(1)
Total expense recognized	28	28
Net loss reclassified	3	3
Postretirement Benefits Other Than Pensions
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	10	12
Interest cost	26	29
Expected return on plan assets	(28)	(28)
Amortization of prior service cost	(1)	(3)
Amortization of net loss	0	6
Expense under accounting standards	7	16
Southern California Edison | Pension Plans
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	38	35
Interest cost	41	38
Expected return on plan assets	(53)	(53)
Amortization of prior service cost	1	1
Amortization of net loss	8	7
Expense under accounting standards	35	28
Regulatory adjustment	(9)	(1)
Total expense recognized	26	27
Net loss reclassified	2	2
Southern California Edison | Postretirement Benefits Other Than Pensions
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	10	12
Interest cost	26	28
Expected return on plan assets	(28)	(28)
Amortization of prior service cost	(1)	(3)
Amortization of net loss	0	6
Expense under accounting standards	$ 7	$ 15

Compensation and Benefit Plan53

Compensation and Benefit Plans (Workforce Reduction) (Details) - Southern California Edison - Employee severance $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)
Restructuring Reserve [Roll Forward]
Balance at January 1, 2016	$ 22
Additions	5
Payments	(15)
Balance at March 31, 2016	$ 12

Compensation and Benefit Plan54

Compensation and Benefit Plans (Textual) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)
Pension Plans
Pension and Other Postretirement Benefits
Employer contributions	$ 5
Estimated future contributions in remainder of year	115
Postretirement Benefits Other Than Pensions
Pension and Other Postretirement Benefits
Employer contributions	7
Estimated future contributions in remainder of year	26
Southern California Edison | Pension Plans
Pension and Other Postretirement Benefits
Employer contributions	1
Estimated future contributions in remainder of year	$ 94

Investments (Amortized Cost and

Investments (Amortized Cost and Fair Value of Nuclear Decommissioning Trusts) (Details) - Southern California Edison - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Nuclear Decommissioning Trusts Disclosures
Amortized Cost	$ 2,817	$ 2,917
Fair Value	4,290	4,331
Stocks
Nuclear Decommissioning Trusts Disclosures
Amortized Cost	311	304
Fair Value	1,464	1,460
Municipal bonds
Nuclear Decommissioning Trusts Disclosures
Amortized Cost	736	691
Fair Value	894	840
U.S. government and agency securities
Nuclear Decommissioning Trusts Disclosures
Amortized Cost	1,002	1,070
Fair Value	1,092	1,128
Corporate bonds
Nuclear Decommissioning Trusts Disclosures
Amortized Cost	662	708
Fair Value	731	755
Short-term investments and receivables/payables
Fair Value Disclosures:
Repurchase agreement	8	81
Nuclear Decommissioning Trusts Disclosures
Amortized Cost	106	144
Fair Value	$ 109	$ 148

Investments (Summary of Changes

Investments (Summary of Changes in Fair Value of the Nuclear Decommissioning Trusts) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Summary Of Changes In The Fair Value [Roll Forward]
Balance at beginning of period	$ 4,331
Balance at end of period	4,290
Southern California Edison
Summary Of Changes In The Fair Value [Roll Forward]
Balance at beginning of period	4,331	$ 4,799
Gross realized gains	17	27
Gross realized losses	(3)	(2)
Unrealized gains, net	59	44
Other-than-temporary impairments	(7)	(4)
Interest and dividends	29	28
Contributions	0	7
Income taxes	(18)	0
Decommissioning disbursements	(116)	0
Administrative expenses and other	(2)	(3)
Balance at end of period	$ 4,290	$ 4,896

Investments (Textual) (Details)

Investments (Textual) (Details) - Southern California Edison - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Other Investments [Line Items]
Unrealized holding gains, net of losses	$ 1,500	$ 1,400
Deferred income taxes related to unrealized gains	357
Nuclear decommissioning trusts	$ 3,900

Regulatory Assets and Liabili58

Regulatory Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Regulatory Assets
Regulatory Assets, Current	$ 538	$ 560
Regulatory Asset, Long-term	7,628	7,512
Regulatory Liabilities
Regulatory Liabilities, Current	1,157	1,128
Regulatory Liabilities, Long-term	5,920	5,676
Environmental Restoration Costs
Regulatory Assets
Regulatory Asset, Long-term	131	129
Southern California Edison
Regulatory Assets
Regulatory Assets, Current	538	560
Regulatory Asset, Long-term	7,628	7,512
Total Regulatory Assets	8,166	8,072
Regulatory Liabilities
Regulatory Liabilities, Current	1,157	1,128
Regulatory Liabilities, Long-term	5,920	5,676
Total Regulatory Liabilities	7,077	6,804
Southern California Edison | Regulatory balancing accounts
Regulatory Assets
Regulatory Assets, Current	329	382
Regulatory Asset, Long-term	39	36
Southern California Edison | Energy derivatives
Regulatory Assets
Regulatory Assets, Current	182	159
Regulatory Asset, Long-term	1,066	1,027
Southern California Edison | Other
Regulatory Assets
Regulatory Assets, Current	27	19
Regulatory Asset, Long-term	282	288
Regulatory Liabilities
Regulatory Liabilities, Current	22	22
Regulatory Liabilities, Long-term	56	79
Southern California Edison | Deferred income taxes, net
Regulatory Assets
Regulatory Asset, Long-term	3,920	3,757
Southern California Edison | Pensions and other postretirement benefits
Regulatory Assets
Regulatory Asset, Long-term	842	849
Southern California Edison | Unamortized investments, net
Regulatory Assets
Regulatory Asset, Long-term	169	182
Southern California Edison | San Onofre
Regulatory Assets
Regulatory Asset, Long-term	982	1,043
Southern California Edison | Unamortized loss on reacquired debt
Regulatory Assets
Regulatory Asset, Long-term	197	201
Southern California Edison | Regulatory balancing accounts
Regulatory Liabilities
Regulatory Liabilities, Current	1,135	1,106
Regulatory Liabilities, Long-term	1,352	1,314
Southern California Edison | Costs of removal
Regulatory Liabilities
Regulatory Liabilities, Long-term	2,822	2,781
Southern California Edison | Recoveries in excess of ARO liabilities
Regulatory Liabilities
Regulatory Liabilities, Long-term	$ 1,690	$ 1,502

Regulatory Assets and Liabili59

Regulatory Assets and Liabilities (Regulatory Balancing Accounts) (Details) - Southern California Edison - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Regulatory balancing accounts | Energy resource recovery account
Regulatory Assets and Liabilities
Net liability	$ (364)	$ (439)
Regulatory balancing accounts | New system generation balancing account
Regulatory Assets and Liabilities
Net liability	(189)	(171)
Refunds of excess revenue | Significant Components
Regulatory Assets and Liabilities
Net liability	(2,119)	(2,002)
Refunds of excess revenue | Public purpose programs and energy efficiency programs
Regulatory Assets and Liabilities
Net liability	(817)	(683)
Refunds of excess revenue | Tax accounting memorandum account and pole loading balancing account
Regulatory Assets and Liabilities
Net liability	(278)	(248)
Refunds of excess revenue | Base rate recovery balancing account
Regulatory Assets and Liabilities
Net liability	(234)	(319)
Refunds of excess revenue | Greenhouse gas auction revenue
Regulatory Assets and Liabilities
Net liability	(156)	(75)
Refunds of excess revenue | FERC balancing accounts
Regulatory Assets and Liabilities
Net liability	43	74
Refunds of excess revenue | Generator settlements
Regulatory Assets and Liabilities
Net liability	0	(4)
Refunds of excess revenue | Other
Regulatory Assets and Liabilities
Net liability	$ (124)	$ (137)

Commitments and Contingencies (

Commitments and Contingencies (Details)	Mar. 31, 2016USD ($)siteinvoices	Apr. 30, 2016USD ($)	Mar. 31, 2016USD ($)siteinvoices	Oct. 31, 2013USD ($)	Jun. 30, 2010USD ($)	Mar. 31, 2016USD ($)siteinvoices	Dec. 31, 2012USD ($)	Jun. 01, 2015USD ($)
Schedule Of Commitments And Contingencies [Line Items]
Damages sought			$ 39,900,000
Gain (Loss) Related to Litigation Settlement	$ 74,500,000		74,500,000			$ 74,500,000
Nuclear Insurance
Schedule Of Commitments And Contingencies [Line Items]
Federal limit on public liability claims from nuclear incident, approximate						13,500,000,000
Southern California Edison
Schedule Of Commitments And Contingencies [Line Items]
Damages sought					$ 112,000,000
Minimum liability for environmental remediation for immaterial sites	$ 3,000,000		$ 3,000,000			$ 3,000,000
Identified material sites for environmental remediation (in number of sites) | site	19		19			19
Minimum costs to be Identified Site	$ 1,000,000
Minimum liability for environmental remediation for material sites	$ 133,000,000		$ 133,000,000			$ 133,000,000
Immaterial sites for environmental remediation (in number of sites) | site	39
Environmental remediation liability	$ 136,000,000		136,000,000			136,000,000
Regulatory assets related to environmental remediation	131,000,000		131,000,000			131,000,000
Portion of recorded liability recoverable from incentive mechanism	$ 49,000,000
Percentage of environmental remediation costs recoverable through an incentive mechanism (as a percent)	90.00%
Liability incurred at majority of the remaining sites through customer rates	$ 82,000,000		82,000,000			82,000,000
Environmental remediation costs to be recovered (as a percent)	100.00%
Amount that cleanup costs could exceed recorded liability for identified material sites						165,000,000
Amount that cleanup costs could exceed recorded liability for immaterial sites						$ 7,000,000
Maximum expected period for cleanup of identified sites (in years)						30 years
Remediation cost estimates (period)						5 years
Expected annual environmental remediation costs, low end of range						$ 7,000,000
Expected annual environmental remediation costs, high end of range						23,000,000
Environmental remediation costs						1,000,000
Insurance coverage for wildfire liabilities Limit								$ 610,000,000
Self insurance retention per wildfire occurrence								$ 10,000,000
Additional Coverage for Certain Wildfire Liabilities	$ 390,000,000		390,000,000			390,000,000
Threshold for wildfire claims (new lines for additional coverage)	610,000,000		610,000,000			610,000,000
Southern California Edison | San Onofre
Schedule Of Commitments And Contingencies [Line Items]
Minimum liability for environmental remediation for material sites	$ 80,000,000		$ 80,000,000			$ 80,000,000
Southern California Edison | San Onofre | Mitsubishi Heavy Industries Ltd
Schedule Of Commitments And Contingencies [Line Items]
Damages sought				$ 4,000,000,000
Number of invoices for reimbursement | invoices	7		7			7
Invoiced amount for reimbursement	$ 149,000,000		$ 149,000,000			$ 149,000,000
Invoiced amount paid for reimbursement						$ 45,000,000
Share of invoice paid							$ 35,000,000
Southern California Edison | San Onofre | Mitsubishi Heavy Industries Ltd
Schedule Of Commitments And Contingencies [Line Items]
Ratepayer allocation of recovery from recoveries						50.00%
Entity allocation of recovery from recoveries						50.00%
Ratepayer allocation of recovery from recoveries, initial amount of settlement						$ 282,000,000
Southern California Edison | San Onofre | Replacement Steam Generators
Schedule Of Commitments And Contingencies [Line Items]
Warranty period						20 years
Southern California Edison | Subsequent Event
Schedule Of Commitments And Contingencies [Line Items]
Damage award		$ 124,000,000
Southern California Edison | Nuclear Insurance
Schedule Of Commitments And Contingencies [Line Items]
Limit on assessment of retrospective premium adjustments, per year, approximate						$ 45,000,000
Maximum assessment per each nuclear incident						255,000,000
Maximum yearly assessment per nuclear incident						38,000,000
Mitsubishi Heavy Industries Ltd | San Onofre
Schedule Of Commitments And Contingencies [Line Items]
Maximum liability per purchase agreement for damages	$ 138,000,000		$ 138,000,000			138,000,000
Asserted counterclaim				$ 41,000,000
SCE and other owners of San Onofre and Palo Verde
Schedule Of Commitments And Contingencies [Line Items]
Damages sought					$ 142,000,000
SCE and other owners of San Onofre and Palo Verde | Subsequent Event
Schedule Of Commitments And Contingencies [Line Items]
Damage award		$ 162,000,000
SCE and other owners of San Onofre and Palo Verde | Nuclear Insurance | San Onofre and Palo Verde
Schedule Of Commitments And Contingencies [Line Items]
Loss limit, property damage insurance, federal minimum requirement						$ 1,060,000,000

Preferred and Preference Stoc61

Preferred and Preference Stock of Utility (Details) - Southern California Edison $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)$ / sharesshares
Series K Preferred Stock
Preferred and Preference Stock of Utility
Preferred stock issued	$ 300
Preference stock dividend rate (percent)	5.45%
Shares issued (in shares) | shares	120,004
Liquidation value (in dollars per share) | $ / shares	$ 2,500
Series D Preferred Stock
Preferred and Preference Stock of Utility
Redemption of preference stock	$ 125

Accumulated Other Comprehensi62

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Increase (Decrease) in Accumulated Other Comprehensive Loss
Beginning balance	$ (56)
Other comprehensive income (loss), net of tax	2	$ (1)
Ending Balance	(54)
Accumulated Defined Benefit Plans Adjustment
Increase (Decrease) in Accumulated Other Comprehensive Loss
Beginning balance	(56)	(58)
Other comprehensive loss before reclassifications	0	(3)
Reclassified from accumulated other comprehensive income	2	2
Other comprehensive income (loss), net of tax	2	(1)
Ending Balance	(54)	(59)
Southern California Edison
Increase (Decrease) in Accumulated Other Comprehensive Loss
Beginning balance	(22)
Other comprehensive income (loss), net of tax	1	1
Ending Balance	(21)
Southern California Edison | Accumulated Defined Benefit Plans Adjustment
Increase (Decrease) in Accumulated Other Comprehensive Loss
Beginning balance	(22)	(28)
Other comprehensive loss before reclassifications	0	0
Reclassified from accumulated other comprehensive income	1	1
Other comprehensive income (loss), net of tax	1	1
Ending Balance	$ (21)	$ (27)

Interest and Other Income and63

Interest and Other Income and Other Expenses (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
SCE interest and other income:
Interest and other income	$ 31	$ 39
SCE other expenses:
Total Edison International other expenses	(6)	(10)
Southern California Edison
SCE interest and other income:
Equity allowance for funds used during construction	22	21
Increase in cash surrender value of life insurance policies	7	10
Interest income	0	1
Other	2	1
Total SCE interest and other income	31	33
Interest and other income	31	33
SCE other expenses:
Civic, political and related activities and donations	(5)	(5)
Other	0	(2)
Total SCE other expenses	(5)	(7)
Total Edison International other expenses	(5)	(7)
Edison International Parent and Other
SCE interest and other income:
Other income of Edison International Parent and Other	0	6
SCE other expenses:
Other expense of Edison International Parent and Other	$ (1)	$ (3)

Supplemental Cash Flows Infor64

Supplemental Cash Flows Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash payments for interest and taxes:
Interest, net of amounts capitalized	$ 158	$ 152
Tax payments (refunds), net	2	0
Common stock
Dividends declared but not paid:
Dividends declared but not paid:	156	136
Preferred and preference stock
Dividends declared but not paid:
Dividends declared but not paid:	1	3
Southern California Edison
Cash payments for interest and taxes:
Interest, net of amounts capitalized	149	144
Tax payments (refunds), net	11	32
Dividends declared but not paid:
Accrued capital expenditures	360	407
Southern California Edison | Common stock
Dividends declared but not paid:
Dividends declared but not paid:	0	147
Southern California Edison | Preferred and preference stock
Dividends declared but not paid:
Dividends declared but not paid:	$ 1	$ 3