Edison International (EIX) 10-Q29 Apr 142014 Q1 Quarterly reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
Document and Entity Information	Mar. 31, 2014	Apr. 25, 2014
Document And Entity Information [Abstract]	'	'
Entity Registrant Name	'EDISON INTERNATIONAL	'
Entity Central Index Key	'0000827052	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	31-Mar-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	325,811,206
Southern California Edison	'	'
Document And Entity Information [Abstract]	'	'
Entity Registrant Name	'SOUTHERN CALIFORNIA EDISON CO	'
Entity Central Index Key	'0000092103	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Non-accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	31-Mar-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	434,888,104

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Operating revenue	$2,926	$2,632
Fuel	72	73
Purchased power	1,071	780
Operation and maintenance	811	873
Depreciation, decommissioning and amortization	410	414
Impairment and other charges	231	0
Total operating expenses	2,595	2,140
Operating income	331	492
Interest and other income	23	34
Interest expense	-141	-131
Other expenses	-8	-11
Income from continuing operations before income taxes	205	384
Income tax expense (benefit)	-19	98
Income from continuing operations	224	286
Income (loss) from discontinued operations, net of tax	-22	12
Net income	202	298
Preferred and preference stock dividend requirements of utility	26	27
Net income (loss) attributable to common shareholders	176	271
Amounts attributable to common shareholders:	'	'
Income from continuing operations, net of tax	198	259
Income (loss) from discontinued operations, net of tax	-22	12
Net income (loss) attributable to common shareholders	176	271
Basic earnings (loss) 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)	$0.61	$0.79
Discontinued operations (in dollars per share)	($0.07)	$0.04
Total (in dollars per share)	$0.54	$0.83
Diluted earnings (loss) per common share attributable to Edison International common shareholders:	'	'
Weighted-average shares of common stock outstanding, including effect of dilutive securities (in shares)	329	329
Continuing operations (in dollars per share)	$0.61	$0.78
Discontinued operations (in dollars per share)	($0.07)	$0.04
Total (in dollars per share)	$0.54	$0.82
Dividends declared per common share (in dollars per share)	$0.36	$0.34
Southern California Edison	'	'
Operating revenue	2,924	2,629
Fuel	72	73
Purchased power	1,071	780
Operation and maintenance	713	785
Depreciation, decommissioning and amortization	410	414
Impairment and other charges	231	0
Property and other taxes	85	79
Total operating expenses	2,582	2,131
Operating income	342	498
Interest and other income	23	32
Interest expense	-136	-125
Other expenses	-7	-10
Income from continuing operations before income taxes	222	395
Income tax expense (benefit)	-12	112
Income from continuing operations	234	283
Net income	234	283
Preferred and preference stock dividend requirements of utility	26	27
Net income (loss) attributable to common shareholders	208	256
Amounts attributable to common shareholders:	'	'
Net income (loss) attributable to common shareholders	$208	$256

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Net income	$202	$298
Pension and postretirement benefits other than pensions:	'	'
Amortization of net loss included in net income	2	0
Other comprehensive income (loss), net of tax	2	0
Comprehensive income	204	298
Less: Comprehensive income attributable to noncontrolling interests	26	27
Comprehensive income attributable to Edison International	178	271
Southern California Edison	'	'
Net income	234	283
Pension and postretirement benefits other than pensions:	'	'
Net loss arising during the period plus amortization included in net income	1	-3
Other comprehensive income (loss), net of tax	1	-3
Comprehensive income	$235	$280

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
ASSETS	'	'
Cash and cash equivalents	$149	$146
Receivables, less allowances of $67 and $66 for uncollectible accounts at respective dates	725	838
Accrued unbilled revenue	576	596
Inventory	268	256
Derivative assets	112	122
Regulatory assets	931	538
Deferred income taxes	369	421
Other current assets	390	395
Total current assets	3,520	3,312
Nuclear decommissioning trusts	4,587	4,494
Other investments	220	207
Total investments	4,807	4,701
Utility property, plant and equipment, less accumulated depreciation of $7,691 and $7,493 at respective dates	30,741	30,379
Nonutility property, plant and equipment, less accumulated depreciation of $76 and $74 at respective dates ($72 and $70 for SCE)	76	76
Total property, plant and equipment	30,817	30,455
Derivative assets	240	251
Regulatory assets	7,351	7,241
Other long-term assets	653	686
Total long-term assets	8,244	8,178
Total assets	47,388	46,646
LIABILITIES AND EQUITY	'	'
Short-term debt	611	209
Current portion of long-term debt	601	601
Accounts payable	1,116	1,407
Accrued taxes	423	358
Customer deposits	204	201
Derivative liabilities	143	152
Regulatory liabilities	455	767
Other current liabilities	1,004	1,186
Total current liabilities	4,557	4,881
Long-term debt	9,825	9,825
Deferred income taxes and credits	7,437	7,346
Derivative liabilities	985	1,042
Pensions and benefits	1,360	1,378
Asset retirement obligations	3,471	3,418
Regulatory liabilities	5,655	4,995
Other deferred credits and other long-term liabilities	2,096	2,070
Total deferred credits and other liabilities	21,004	20,249
Total liabilities	35,386	34,955
Commitments and contingencies (Note 12)	'	'
Common stock, no par value (800,000,000 shares authorized; 325,811,206 shares issued and outstanding at each date) and (560,000,000 shares authorized; 434,888,104 shares issued and outstanding at each date for SCE)	2,417	2,403
Accumulated other comprehensive loss	-11	-13
Retained earnings	7,573	7,548
Total common shareholders' equity	9,979	9,938
Preferred and preference stock of utility	2,023	1,753
Total noncontrolling interests	2,023	1,753
Total equity	12,002	11,691
Total liabilities and equity	47,388	46,646
Southern California Edison	'	'
ASSETS	'	'
Cash and cash equivalents	46	54
Receivables, less allowances of $67 and $66 for uncollectible accounts at respective dates	702	813
Accrued unbilled revenue	576	596
Inventory	262	256
Derivative assets	112	122
Regulatory assets	931	538
Deferred income taxes	245	303
Other current assets	388	393
Total current assets	3,262	3,075
Nuclear decommissioning trusts	4,587	4,494
Other investments	150	140
Total investments	4,737	4,634
Utility property, plant and equipment, less accumulated depreciation of $7,691 and $7,493 at respective dates	30,741	30,379
Nonutility property, plant and equipment, less accumulated depreciation of $76 and $74 at respective dates ($72 and $70 for SCE)	71	72
Total property, plant and equipment	30,812	30,451
Derivative assets	240	251
Regulatory assets	7,351	7,241
Other long-term assets	396	398
Total long-term assets	7,987	7,890
Total assets	46,798	46,050
LIABILITIES AND EQUITY	'	'
Short-term debt	405	175
Current portion of long-term debt	600	600
Accounts payable	1,089	1,373
Customer deposits	204	201
Derivative liabilities	143	152
Regulatory liabilities	455	767
Deferred income taxes	42	39
Other current liabilities	1,100	1,091
Total current liabilities	4,038	4,398
Long-term debt	9,423	9,422
Deferred income taxes and credits	7,928	7,841
Derivative liabilities	985	1,042
Pensions and benefits	932	951
Asset retirement obligations	3,471	3,418
Regulatory liabilities	5,655	4,995
Other deferred credits and other long-term liabilities	1,885	1,845
Total deferred credits and other liabilities	20,856	20,092
Total liabilities	34,317	33,912
Commitments and contingencies (Note 12)	'	'
Common stock, no par value (800,000,000 shares authorized; 325,811,206 shares issued and outstanding at each date) and (560,000,000 shares authorized; 434,888,104 shares issued and outstanding at each date for SCE)	2,168	2,168
Additional paid-in capital	598	592
Accumulated other comprehensive loss	-10	-11
Retained earnings	7,655	7,594
Total common shareholders' equity	10,411	10,343
Preferred and preference stock of utility	2,070	1,795
Total equity	12,481	12,138
Total liabilities and equity	$46,798	$46,050

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Receivables, allowances for uncollectible accounts (in dollars)	$67	$66
Utility property, plant and equipment, accumulated depreciation (in dollars)	7,691	7,493
Nonutility property, plant and equipment, accumulated depreciation (in dollars)	76	74
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)	67	66
Utility property, plant and equipment, accumulated depreciation (in dollars)	7,691	7,493
Nonutility property, plant and equipment, accumulated depreciation (in dollars)	$72	$70
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_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:	'	'
Net income	$202	$298
Less: Income (loss) from discontinued operations	-22	12
Income from continuing operations	224	286
Adjustments to reconcile to net cash provided by operating activities:	'	'
Depreciation, decommissioning and amortization	410	414
Regulatory impacts of net nuclear decommissioning trust earnings	29	25
Impairment and other charges	231	0
Deferred income taxes and investment tax credits	-6	174
Other	23	23
Changes in operating assets and liabilities:	'	'
Receivables	112	-38
Inventory	-12	-11
Accounts payable	-63	-65
Other current assets and liabilities	-80	-120
Derivative assets and liabilities, net	-46	79
Regulatory assets and liabilities, net	-331	-199
Other noncurrent assets and liabilities	7	-62
Net cash provided by operating activities	498	506
Cash flows from financing activities:	'	'
Long-term debt issued, net of premium, discount, and issuance costs of $1 and $4 for the three months ended March 31, 2014 and 2013, respectively ($0 and $4 for SCE, respectively)	-1	394
Long-term debt matured or repurchased	-2	-1
Preference stock issued, net	270	387
Preference stock redeemed	0	-400
Short-term debt financing, net	401	245
Settlements of stock-based compensation, net	-42	-32
Dividends to noncontrolling interests	-30	-30
Dividends paid	-116	-110
Net cash provided by financing activities	480	453
Cash flows from investing activities:	'	'
Capital expenditures	-940	-979
Proceeds from sale of nuclear decommissioning trust investments	1,502	435
Purchases of nuclear decommissioning trust investments and other	-1,536	-466
Other	-1	-4
Net cash used by investing activities	-975	-1,014
Net (decrease) increase in cash and cash equivalents	3	-55
Cash and cash equivalents at beginning of period	146	170
Cash and cash equivalents at end of period	149	115
Southern California Edison	'	'
Cash flows from operating activities:	'	'
Net income	234	283
Income from continuing operations	234	283
Adjustments to reconcile to net cash provided by operating activities:	'	'
Depreciation, decommissioning and amortization	410	414
Regulatory impacts of net nuclear decommissioning trust earnings	29	25
Impairment and other charges	231	0
Deferred income taxes and investment tax credits	-12	150
Other	22	22
Changes in operating assets and liabilities:	'	'
Receivables	111	1
Inventory	-7	-11
Accounts payable	-55	-63
Other current assets and liabilities	-80	-93
Derivative assets and liabilities, net	-46	79
Regulatory assets and liabilities, net	-331	-199
Other noncurrent assets and liabilities	15	-47
Net cash provided by operating activities	521	561
Cash flows from financing activities:	'	'
Long-term debt issued, net of premium, discount, and issuance costs of $1 and $4 for the three months ended March 31, 2014 and 2013, respectively ($0 and $4 for SCE, respectively)	0	394
Long-term debt matured or repurchased	-2	-1
Preference stock issued, net	270	387
Preference stock redeemed	0	-400
Short-term debt financing, net	229	229
Settlements of stock-based compensation, net	-22	-29
Dividends paid	-30	-150
Net cash provided by financing activities	445	430
Cash flows from investing activities:	'	'
Capital expenditures	-939	-979
Proceeds from sale of nuclear decommissioning trust investments	1,502	435
Purchases of nuclear decommissioning trust investments and other	-1,536	-466
Other	-1	1
Net cash used by investing activities	-974	-1,009
Net (decrease) increase in cash and cash equivalents	-8	-18
Cash and cash equivalents at beginning of period	54	45
Cash and cash equivalents at end of period	$46	$27

Consolidated_Statements_of_Cas1

Consolidated Statements of Cash Flows (Parenthetical) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Premiums Discounts and Issuance Costs of Long Term Debt	$1	$4
Southern California Edison	'	'
Premiums Discounts and Issuance Costs of Long Term Debt	$0	$4

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2014
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 subsidiaries that are engaged in competitive businesses related to the delivery or use of electricity. 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 2013 Form 10-K. The same accounting policies are followed for interim reporting purposes, with the exception of accounting principles adopted as of January 1, 2014, discussed below in "—New Accounting Guidance." This quarterly report should be read in conjunction with the financial statements and notes included in the 2013 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, 2014 are not necessarily indicative of the operating results for the full year.
	The December 31, 2013 condensed consolidated balance sheet 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 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, 2013		March 31,		December 31, 2013
		2014				2014
	Money market funds	$	67	$	68	$	6	$	8

	Cash is temporarily invested until required for check clearing from the primary disbursement accounts. 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, 2013		March 31,		December 31, 2013
		2014				2014
	Cash reclassified to accounts payable	$	149	$	168	$	148	$	163

	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
	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)	2014		2013
	Basic earnings per share – continuing operations:
	Income from continuing operations available to common shareholders	$	198	$	259

	Weighted average common shares outstanding	326		326

	Basic earnings per share – continuing operations	$	0.61	$	0.79

	Diluted earnings per share – continuing operations:
	Income from continuing operations available to common shareholders	$	198	$	259

	Income impact of assumed conversions	—		—

	Income from continuing operations available to common shareholders and assumed conversions	$	198	$	259

	Weighted average common shares outstanding	326		326

	Incremental shares from assumed conversions	3		3

	Adjusted weighted average shares – diluted	329		329

	Diluted earnings per share – continuing operations	$	0.61	$	0.78

	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 2,050,449 and 4,455,669 shares of common stock for the three months ended March 31, 2014 and 2013, 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 in 2014
	In July 2013, the FASB issued an accounting standards update that requires that an unrecognized tax benefit be presented on the balance sheet as a reduction of a deferred tax asset for a net operating loss ("NOL") or tax credit carryforward under certain circumstances. Edison International and SCE adopted this guidance effective January 1, 2014 and it did not have a material impact on the consolidated financial statements.
	Accounting Guidance Not Yet Adopted
	In April 2014, the FASB issued an accounting standards update which will reduce the number of disposals that qualify for reporting as a discontinued operation and will also increase the associated disclosure. Under the new guidance, only disposals representing a strategic shift in operations should be presented as discontinued operations. In addition, this update also requires disclosure of the pre-tax income attributable to a disposal of a significant part of an organization that does not qualify for discontinued operations reporting. Edison International and SCE will adopt this guidance prospectively effective January 1, 2015.

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Equity (Notes)	3 Months Ended
	Mar. 31, 2014
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, 2014:


		Equity Attributable to Edison International															Noncontrolling Interests
	(in millions)	Common			Accumulated				Retained				Subtotal				Preferred				Total
		Stock			Other				Earnings								and				Equity
					Comprehensive												Preference
					Loss												Stock
	Balance at December 31, 2013	$	2,403		$	(13	)		$	7,548			$	9,938			$	1,753			$	11,691

	Net income	—			—				176				176				26				202

	Other comprehensive income	—			2				—				2				—				2

	Common stock dividends declared ($0.355 per share)	—			—				(116		)		(116		)		—				(116		)

	Dividends, distributions to noncontrolling interests	—			—				—				—				(26		)		(26		)

	Stock-based compensation and other	9			—				(50		)		(41		)		—				(41		)

	Non-cash stock-based compensation and other	5			—				15				20				—				20

	Issuance of preference stock	—			—				—				—				270				270

	Balance at March 31, 2014	$	2,417		$	(11	)		$	7,573			$	9,979			$	2,023			$	12,002

	The following table provides Edison International's changes in equity for the three months ended March 31, 2013:


		Equity Attributable to Edison International															Noncontrolling Interests
	(in millions)	Common			Accumulated				Retained				Subtotal				Preferred				Total
		Stock			Other				Earnings								and				Equity
					Comprehensive												Preference
					Loss												Stock
	Balance at December 31, 2012	$	2,373		$	(87	)		$	7,146			$	9,432			$	1,759			$	11,191

	Net income	—			—				271				271				27				298

	Common stock dividends declared ($0.3375 per share)	—			—				(110		)		(110		)		—				(110		)

	Dividends, distributions to noncontrolling interests	—			—				—				—				(27		)		(27		)

	Stock-based compensation and other	1			—				(33		)		(32		)		—				(32		)

	Non-cash stock-based compensation and other	6			—				(4		)		2				—				2

	Issuance of preference stock	—			—				—				—				387				387

	Redemption of preference stock	—			—				(8		)		(8		)		(392		)		(400		)

	Balance at March 31, 2013	$	2,380		$	(87	)		$	7,262			$	9,555			$	1,754			$	11,309

	The following table provides SCE's changes in equity for the three months ended March 31, 2014:


		Equity Attributable to SCE
	(in millions)	Common			Additional				Accumulated				Retained				Preferred				Total
		Stock			Paid-in				Other				Earnings				and				Equity
					Capital				Comprehensive								Preference
									Loss								Stock
	Balance at December 31, 2013	$	2,168		$	592			$	(11	)		$	7,594			$	1,795			$	12,138

Net income	—			—				—				234				—				234

Other comprehensive income	—			—				1				—				—				1

Dividends declared on common stock	—			—				—				(126		)		—				(126		)

Dividends on preferred and preference stock	—			—				—				(26		)		—				(26		)

Stock-based compensation and other	—			9				—				(31		)		—				(22		)

Non-cash stock-based compensation and other	—			2				—				10				—				12

Issuance of preference stock	—			(5		)		—				—				275				270

Balance at March 31, 2014	$	2,168		$	598			$	(10	)		$	7,655			$	2,070			$	12,481

The following table provides SCE's changes in equity for the three months ended March 31, 2013:


	Equity Attributable to SCE
(in millions)	Common			Additional				Accumulated				Retained				Preferred				Total
	Stock			Paid-in				Other				Earnings				and				Equity
				Capital				Comprehensive								Preference
								Loss								Stock
Balance at December 31, 2012	$	2,168		$	581			$	(29	)		$	7,228			$	1,795			$	11,743

Net income	—			—				—				283				—				283

Other comprehensive income	—			—				(3		)		—				—				(3		)

Dividends declared on common stock	—			—				—				(120		)		—				(120		)

Dividends on preferred and preference stock	—			—				—				(27		)		—				(27		)

Stock-based compensation and other	—			—				—				(29		)		—				(29		)

Non-cash stock-based compensation and other	—			3				—				5				—				8

Issuance of preference stock	—			(13		)		—				—				400				387

Redemption of preference stock	—			8				—				(8		)		(400		)		(400		)

Balance at March 31, 2013	$	2,168		$	579			$	(32	)		$	7,332			$	1,795			$	11,842

Variable_Interest_Entities

Variable Interest Entities	3 Months Ended
Variable Interest Entities	Mar. 31, 2014
Variable Interest Entities Disclosure [Abstract]	'
Variable Interest Entities	'
	Variable Interest Entities
	A VIE is defined as a legal entity whose equity owners do not have sufficient equity at risk, or, as a group, the holders of the equity investment at risk 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. 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 12 of the 2013 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 for these VIE projects was 5,641 MW and 3,578 MW at March 31, 2014 and 2013, respectively, and the amounts that SCE paid to these projects were $125 million and $98 million for the three months ended March 31, 2014 and 2013, respectively. These amounts are recoverable in customer rates, subject to reasonableness review.
	Unconsolidated Trusts of SCE
	SCE Trust I, Trust II and Trust III were formed in 2012, 2013 and 2014, respectively, for the exclusive purpose of issuing the 5.625%, 5.10% and 5.75% 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 and Trust III issued $475 million, $400 million and $275 million, respectively, (cumulative, liquidation amount of $25 per share) to the public and $10,000 of common stock each to SCE. The trusts invested the proceeds of these trust securities in Series F, Series G and Series H Preference Stock issued by SCE in the principal amounts of $475 million, $400 million and $275 million (cumulative, $2,500 per share liquidation value), respectively, which have substantially the same payment terms as the trust securities.
	The Series F, Series G and Series H 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 or Series H Preference Stock, a corresponding dollar amount of trust securities will be redeemed by the applicable trust (for further information see Note 13). 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 Series F, Series G or Series H Preference Stock. The applicable trusts will use any dividends it receives on the Series F, Series G or Series H 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 Series F, Series G and Series H Preference Stock.
	The Trust I and Trust II balance sheets as of March 31, 2014 and December 31, 2013, consisted of investments of $475 million and $400 million in the Series F and Series G Preference Stock, respectively, $475 million and $400 million of trust securities, respectively, and $10,000 each of common stock. The Trust III balance sheet as of March 31, 2014 consisted of investments of $275 million in the Series H Preference Stock, $275 million of trust securities, and $10,000 of common stock.
	The trusts' income statements consisted of both dividend income and dividend distributions in the amounts of $7 million and $7 million for the three months ended March 31, 2014 and 2013, respectively for Trust I, $5 million and $4 million for the three months ended March 31, 2014 and 2013, respectively for Trust II, and $1 million for the three months ended March 31, 2014 for Trust III.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2014
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, 2014 and December 31, 2013, 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 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 and derivatives, 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.
	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, 2014
	(in millions)	Level 1				Level 2				Level 3				Netting				Total
														and
														Collateral1
	Assets at fair value
	Derivative contracts	$	—			$	20			$	345			$	(13	)		$	352

	Other	38				—				—				—				38

	Nuclear decommissioning trusts:
	Stocks2	2,234				—				—				—				2,234

	Fixed Income3	777				1,221				—				—				1,998

	Short-term investments, primarily cash equivalents	335				75				—				—				410

	Subtotal of nuclear decommissioning trusts4	3,346				1,296				—				—				4,642

	Total assets	3,384				1,316				345				(13		)		5,032

	Liabilities at fair value
	Derivative contracts	—				29				1,118				(19		)		1,128

	Total liabilities	—				29				1,118				(19		)		1,128

	Net assets (liabilities)	$	3,384			$	1,287			$	(773	)		$	6			$	3,904



		December 31, 2013
	(in millions)	Level 1				Level 2				Level 3				Netting				Total
														and
														Collateral1
	Assets at fair value
	Derivative contracts	$	—			$	11			$	372			$	(10	)		$	373

	Other	39				—				—				—				39

	Nuclear decommissioning trusts:
	Stocks2	2,208				—				—				—				2,208

	Fixed Income3	841				1,102				—				—				1,943

	Short-term investments, primarily cash equivalents	331				—				—				—				331

	Subtotal of nuclear decommissioning trusts4	3,380				1,102				—				—				4,482

	Total assets	3,419				1,113				372				(10		)		4,894

	Liabilities at fair value
Derivative contracts	—				37				1,177				(20		)		1,194

Total liabilities	—				37				1,177				(20		)		1,194

Net assets (liabilities)	$	3,419			$	1,076			$	(805	)		$	10			$	3,700


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 March 31, 2014 and December 31, 2013, respectively.

3	At March 31, 2014 and December 31, 2013, SCE's corporate bonds were diversified and included collateralized mortgage obligations and other asset backed securities of $46 million and $47 million, respectively.

4	Excludes net payables of $55 million and net receivables of $12 million at March 31, 2014 and December 31, 2013, respectively, of interest and dividend receivables as well as receivables and payables related to SCE's pending securities sales and purchases.

Edison International
Assets measured at fair value consisted of money market funds of $67 million and $68 million at March 31, 2014 and December 31, 2013, 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)		2014				2013
Fair value of net liabilities at beginning of period		$	(805	)		$	(791	)
Total realized/unrealized gains (losses):
Included in regulatory assets and liabilities1		31				(82		)

Purchases		7				18

Settlements		(6		)		(27		)
Fair value of net liabilities at end of period		$	(773	)		$	(882	)
Change during the period in unrealized gains and losses related to assets and liabilities held at the end of the period		$	22			$	(66	)


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 transfers between any levels during 2014 and 2013.
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
31-Mar-14	$	345			$	—		Market simulation model	Load forecast	7,603 MW - 24,896 MW

									Power prices	$(9.86) - $108.56
									Gas prices	$3.50 - $7.10
31-Dec-13	366				—			Market simulation model	Load forecast	7,603 MW - 24,896 MW

									Power prices	$(9.86) - $108.56
									Gas prices	$3.50 - $7.10
Tolling
31-Mar-14	4				1,111			Option model	Volatility of gas prices	13% - 31% (18%)

									Volatility of power prices	26% - 61% (32%)
									Power prices	$37.50 - $70.80 ($50.10)
31-Dec-13	5				1,175			Option model	Volatility of gas prices	16% - 35% (21%)

									Volatility of power prices	25% - 45% (30%)
									Power prices	$38.00 - $63.90 ($47.40)
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 Long-Term Debt Recorded at Carrying Value
The carrying value and fair value of Edison International and SCE's long-term debt (including current portion of long-term debt) are as follows:


		March 31, 2014								December 31, 2013
(in millions)		Carrying				Fair				Carrying				Fair
		Value				Value				Value				Value
SCE		$	10,023			$	11,012			$	10,022			$	10,656

Edison International		10,426				11,442				10,426				11,084

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 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
Debt and Credit Agreements	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Debt and Credit Agreements	'
	Debt and Credit Agreements
	Credit Agreements and Short-Term Debt
	In January 2014, SCE issued $300 million of floating rate first and refunding mortgage bonds due in January 2015. The proceeds from these bonds were used for working capital to fund the ERRA balancing account undercollections.
	At March 31, 2014, SCE's outstanding commercial paper was $105 million at a weighted-average interest rate of 0.20%. This commercial paper was supported by a $2.75 billion multi-year revolving credit facility. At March 31, 2014, letters of credit issued under SCE's credit facility aggregated $141 million and are scheduled to expire in twelve months or less. At December 31, 2013, the outstanding commercial paper was $175 million at a weighted-average interest rate of 0.24%.
	At March 31, 2014, Edison International Parent's outstanding commercial paper was $206 million at a weighted-average interest rate of 0.51%. This commercial paper was supported by a $1.25 billion multi-year revolving credit facility. At December 31, 2013, the outstanding commercial paper was $34 million at a weighted-average interest rate of 0.55%.

Derivative_Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Instruments and Hedging Activities	'
	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 represents 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 allows 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 credit worthiness 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 pay the derivative liability or post additional collateral. The net fair value of all derivative liabilities with these credit-risk-related contingent features was $53 million and $49 million as of March 31, 2014 and December 31, 2013, respectively, for which SCE has posted no collateral to its counterparties for the respective periods. If the credit-risk-related contingent features underlying these agreements were triggered on March 31, 2014, SCE would be required to post collateral in the amount of $10 million, excluding the impact of unpaid closed positions as their settlement is not impacted by the credit-risk-related contingent features.
	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. The following table summarizes the gross and net fair values of SCE's commodity derivative instruments:


			March 31, 2014
			Derivative Assets									Derivative Liabilities
	(in millions)		Short-Term			Long-Term			Subtotal			Short-Term			Long-Term			Subtotal			Net
																					Liability
	Commodity derivative contracts
	Gross amounts recognized		$	135		$	240		$	375		$	170		$	987		$	1,157		$	782

	Gross amounts offset in the consolidated balance sheets		(23		)	—			(23		)	(23		)	—			(23		)	—

	Cash collateral posted1		—			—			—			(4		)	(2		)	(6		)	(6		)

	Net amounts presented in the consolidated balance sheets		$	112		$	240		$	352		$	143		$	985		$	1,128		$	776



			December 31, 2013
			Derivative Assets									Derivative Liabilities
	(in millions)		Short-Term			Long-Term			Subtotal			Short-Term			Long-Term			Subtotal			Net
																					Liability
	Commodity derivative contracts
	Gross amounts recognized		$	141		$	251		$	392		$	178		$	1,045		$	1,223		$	831

	Gross amounts offset in the consolidated balance sheets		(19		)	—			(19		)	(19		)	—			(19		)	—

	Cash collateral posted1		—			—			—			(7		)	(3		)	(10		)	(10		)

	Net amounts presented in the consolidated balance sheets		$	122		$	251		$	373		$	152		$	1,042		$	1,194		$	821


	1	In addition, at March 31, 2014 and December 31, 2013, SCE had posted $7 million and $19 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 results 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)		2014			2013
	Realized losses		$	(37	)	$	(16	)
	Unrealized gains (losses)		52			(54		)

	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,		December 31, 2013
					2014
	Electricity options, swaps and forwards		GWh		5,086		6,274

	Natural gas options, swaps and forwards		Bcf		8		12

Congestion revenue rights		GWh		135,714		149,234

Tolling arrangements		GWh		86,248		87,991

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2014
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)		2014			2013			2014			2013
	Income from continuing operations before income taxes		$	205		$	384		$	222		$	395

	Provision for income tax at federal statutory rate of 35%		71			134			78			138

	Increase (decrease) in income tax from:
	State tax, net of federal benefit		1			3			1			14

	Property-related		(51		)	(41		)	(51		)	(42		)
	Change related to uncertain tax positions		7			7			7			7

	San Onofre settlement		(40		)	—			(40		)	—

	Other		(7		)	(5		)	(7		)	(5		)
	Total income tax expense (benefit) from continuing operations		$	(19	)	$	98		$	(12	)	$	112

	Effective tax rate		(9.3		)%	25.5		%	(5.4		)%	28.4		%
	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. The accounting treatment for these temporary differences results in recording regulatory assets and liabilities for amounts that would otherwise be recorded to deferred income tax expense.
	Property-related items include recognition of income tax benefits from repair deductions for income tax purposes. During the first quarter of 2014, SCE recorded flow through tax benefits related to repair deductions and other tax items under the San Onofre Settlement. The tax benefits were offset by estimated refunds to customers included as part of the pre-tax charge of $231 million.
	Tax Disputes
	The IRS examination phase of tax years 2003 through 2006 was completed in the fourth quarter of 2010, which included proposed adjustments for the following two items:

	•	A proposed adjustment increasing the taxable gain on the 2004 sale of EME's international assets, which if sustained, would result in a federal tax payment of approximately $208 million, including interest and penalties through March 31, 2014.

	•	A proposed adjustment to disallow a component of SCE's repair allowance deduction, which if sustained, would result in a federal tax payment of approximately $101 million, including interest through March 31, 2014.
	Edison International disagrees with the proposed adjustments and filed a protest with the IRS in the first quarter of 2011. Edison International anticipates that the IRS will issue a deficiency notice for the tax, interest and possibly penalties at the conclusion of the IRS appeals process. After the receipt of such deficiency notice, Edison International will have 90 days to file a petition in United States Tax Court. If a petition is not timely filed, Edison International anticipates after the expiration of the 90-day period, the IRS will assess the underpayment of tax, interest and penalties, if any, and demand payment.
	Tax Years 2007 – 2009
	The IRS examination phase of tax years 2007 through 2009 was completed during the first quarter of 2013. Edison International received a Revenue Agent Report from the IRS on February 28, 2013 which included a proposed adjustment to disallow a component of SCE's repair allowance deduction (similar to the 2003 – 2006 tax years). The proposed adjustment to disallow a component of SCE's repair allowance deduction, if sustained, would result in a federal tax payment of approximately $75 million, including interest through March 31, 2014. Edison International disagrees with the proposed adjustment and filed a protest with the IRS in April 2013.

Compensation_and_Benefit_Plans

Compensation and Benefit Plans	3 Months Ended
	Mar. 31, 2014
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 $6 million during the three months ended March 31, 2014. Edison International expects to make contributions of $202 million during the remainder of 2014, which includes $185 million from SCE. Annual contributions made 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)	2014				2013			2014			2013
	Service cost	$	30			$	38		$	29		$	37

	Interest cost	45				42			44			41

	Expected return on plan assets	(57		)		(57		)	(56		)	(57		)
	Amortization of prior service cost	1				1			1			1

	Amortization of net loss1	1				15			—			14

	Expense under accounting standards	$	20			$	39		$	18		$	36

	Regulatory adjustment	31				17			31			17

	Total expense recognized	$	51			$	56		$	49		$	53


	1	Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International and SCE was $2 million and $1 million for the three months ended March 31, 2014, respectively, and $3 million and $2 million for the three months ended March 31, 2013, respectively.
	Postretirement Benefits Other Than Pensions
	Edison International made contributions of $4 million during the three months ended March 31, 2014 and expects to make contributions of $11 million during the remainder of 2014, 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. 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)	2014				2013			2014			2013
	Service cost	$	11			$	14		$	11		$	13

	Interest cost	27				26			27			26

	Expected return on plan assets	(28		)		(30		)	(28		)	(30		)
	Amortization of prior service credit	(9		)		(9		)	(9		)	(9		)
	Amortization of net loss	—				7			—			7

	Total expense	$	1			$	8		$	1		$	7

	Workforce Reductions
	In 2012, SCE commenced multiple efforts to reduce its workforce in order to reflect SCE's strategic direction to optimize its cost structure, moderate customer rate increases and align its cost structure with its peers. In addition, in June 2013, SCE announced plans to permanently retire San Onofre, which resulted in additional workforce reductions. See Note 9 for further information. Through March 31, 2014, SCE's share of estimated cash severance for these efforts totaled $213 million. The following table provides a summary of changes in the accrued severance liability associated with these reductions:


	(in millions)
	Balance at January 1, 2014		$	54

	Additions		—

	Payments		(10		)
	Balance at March 31, 2014		$	44

	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.

San_Onofre_Issues_Notes

San Onofre Issues (Notes)	3 Months Ended
	Mar. 31, 2014
Retirement Of Plant [Abstract]	'
Permanent Retirement of San Onofre	'
	San Onofre Issues
	Replacement steam generators were installed at San Onofre in 2010 and 2011. On January 31, 2012, a water 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 to tube wear. At the time, Unit 2 was off-line for a planned outage when areas of unexpected tube to support structure wear were found. Later, evidence of tube to tube wear in Unit 2 was also discovered. On June 6, 2013, SCE decided to permanently retire Units 2 and 3.
	Entry Into Settlement Agreement with Certain OII Parties
	In October 2012 the CPUC issued an Order Instituting Investigation (“OII”) that consolidated all San Onofre issues in related CPUC regulatory proceedings to consider appropriate cost recovery for all San Onofre costs, including among other costs, the cost of the steam generator replacement project, substitute market power costs, capital expenditures, and operation and maintenance costs.
	On March 27, 2014, SCE entered into a Settlement Agreement with The Utility Reform Network ("TURN"), the CPUC's Office of Ratepayer Advocates ("ORA") and SDG&E, which was later joined by the Coalition of California Utility Employees ("CUE") and Friends of the Earth ("FOE") (together, the “Settling Parties”). If implemented, the Settlement Agreement will constitute a complete and final resolution of the CPUC’s OII and related proceedings regarding the Steam Generator Replacement Project (“SGRP”) at San Onofre and the related outage and subsequent shutdown of San Onofre. The Settlement Agreement does not affect proceedings before the NRC or proceedings related to recoveries from third parties described below. Implementation of the Settlement Agreement is subject to the approval of the CPUC. The parties to the Settlement Agreement have agreed to exercise their best efforts to obtain CPUC approval. The Settlement Agreement is subject to termination by any of the Settling Parties if the CPUC has not approved it within six months of submission, but there can be no certainty of when or what the CPUC will actually decide.
	Disallowances, Refunds and Rate Recoveries
	If the Settlement Agreement is approved, SCE will not be allowed to recover in rates its capitalized costs for the SGRP as of February 1, 2012 or a return on such investment after such date. As of February 1, 2012, SCE’s net book value in the SGRP was approximately $597 million. Additionally, SCE will not be allowed to recover in rates approximately $99 million of incremental inspection and repair costs incurred for the replacement steam generators (“RSGs”) in 2012 that were in excess of CPUC-authorized operations and maintenance expense. These costs, net of invoices paid, were previously expensed in SCE’s 2012 financial results, although they remain subject to recovery from the supplier of the RSGs. Neither will SCE be allowed to recover in rates provisionally authorized operations and maintenance expense in 2013 that exceeds amounts included in recorded operations and maintenance expense (including severance and incremental repair and inspection costs); such excess had not been recognized in 2013 earnings. Subject to the foregoing, SCE will be authorized to recover in rates its remaining investment in San Onofre, including base plant, materials and supplies, nuclear fuel inventory and contracts and construction work in progress (“CWIP”), generally over a ten-year period commencing February 1, 2012. Additionally, SCE will be authorized to recover in rates its provisionally authorized operations and maintenance expenses for 2012, recorded costs for the 2012 refueling outage of Unit 2, recorded operations and maintenance expenses for 2013, and recorded operations and maintenance expenses for 2014 subject to customary prudency review. Finally, SCE will also be authorized to recover in rates through its fuel and purchased power balancing account (“ERRA”) all costs incurred to purchase electric power in the market related to the outage and shutdown of San Onofre, and to recover by December 31, 2015 any San Onofre-related ERRA undercollections. Estimated market power costs through June 6, 2013 (the date of San Onofre’s retirement) were approximately $680 million using the methodology followed in the OII. To the extent that amounts otherwise recoverable in rates under the Settlement Agreement are recovered from SCE’s Decommissioning Trust as a decommissioning cost, the amounts otherwise recoverable in rates will be reduced with no impact on earnings.
	The portion of SCE’s San Onofre investment in base plant, CWIP and materials and supplies, which SCE is entitled to recover from February 1, 2012, will earn a return equal to the weighted average of SCE’s authorized return on debt and 50% of its authorized return on preferred equity, pro-rated to the percentage of the investment that equals SCE’s percentage of debt and preferred equity in its authorized capital structure. SCE will not earn a return on common equity on its amortizable San Onofre investment. Accordingly, SCE will be allowed to earn a rate of return of 2.95% in 2012, 2.62% for the period 2013 –2014 and a rate that will float during the amortization period thereafter with changes in SCE’s authorized return on debt and preferred equity. SCE’s investment in nuclear fuel will earn a return equal to commercial paper rates that SCE pays from time to time.
	Accounting and Financial Impact
	Due to the decision to early retire San Onofre Units 2 and 3, GAAP required reclassification of the amounts recorded in property, plant and equipment and related tangible operating assets to a regulatory asset to the extent that management concluded it was probable of recovery through future rates. Regulatory assets may also be recorded to the extent management concludes it is probable that direct and indirect costs incurred to retire Units 2 and 3 as of each reporting date are recoverable through future rates. In accordance with these requirements and as a result of its decision to retire San Onofre Units 2 and 3, SCE reclassified $1,521 million of its total investment in San Onofre at May 31, 2013 to a regulatory asset (“San Onofre Regulatory Asset”) and recorded an impairment charge of $575 million ($365 million after tax) in the second quarter of 2013. As of December 31, 2013, SCE had recorded a net regulatory asset of approximately $1.3 billion, comprised of $1.56 billion of property, plant and equipment, less $266 million for estimated refunds of authorized revenue recorded in excess of SCE’s costs of service.
	As a result of the execution of the Settlement Agreement by the Settling Parties, SCE has concluded that the outcome of the OII that is more likely than any other outcome is approval and implementation of the Settlement Agreement, although approval by the CPUC remains uncertain. As a result, in the first quarter of 2014, SCE recorded an additional pre-tax charge of approximately $231 million (approximately $96 million after-tax). Including the amounts recorded during the first quarter of 2014 and the amounts previously recorded in 2013, the total impact of the San Onofre Settlement is estimated at $806 million (approximately $461 million after-tax). The total pre-tax charge is due to:

	•	the disallowance of the SGRP investment ($542 million as of May 31, 2013);

	•	refund of revenue related to the SGRP previously recognized of $159 million; and

	•	implementation of the other terms of the Settlement Agreement, including a refund of flow through tax benefits of $71 million and a refund of the authorized return in excess of the return allowed for non-SGRP investments. The refund was offset by recognition of tax benefits in an equal amount. The after-tax impact of the settlement was $96 million.
	At March 31, 2014, the San Onofre Regulatory Asset was $1.37 billion and the San Onofre regulatory liability for refunds of revenue was approximately $371 million. Such amounts do not reflect any recoveries from third parties by SCE.
	Settlement Agreement Procedure
	On April 3, 2014, the Settling Parties filed a motion in the OII requesting the CPUC to approve the Settlement Agreement without change, find the Settlement Agreement reasonable and expedite consideration of the Settlement Agreement in order to provide the benefits of it as soon as possible. The Settling Parties also urged the CPUC to stay further proceedings in the OII pending a determination on the Settlement Agreement and to withdraw the November 19, 2013 Proposed Decision on Phase 1 and Phase 1A issues in the OII. During the pendency of proceedings regarding the Settlement Agreement, the Settling Parties are further bound to support and mutually defend the Settlement Agreement in its entirety, oppose any modifications proposed by any non-settling party to the OII unless all Settling Parties agree, and cooperate reasonably on all submissions. The Settling Parties further agree to review any CPUC orders regarding the Settlement Agreement to determine if the CPUC has changed or modified it, deleted a term or imposed a new term. If any Settling Party is unwilling to accept any such change, modification, deletion or addition of a new term, then the Settling Parties will negotiate in good faith to seek a resolution acceptable to all Settling Parties. If they are unable to resolve the matter to the satisfaction of all Settling Parties or to obtain prompt CPUC approval of an agreed upon resolution, then any Settling Party can terminate the Settlement Agreement upon prompt notice.
	Under CPUC rules, parties in the OII will have an opportunity to comment on the Settlement Agreement, and if there are objections raising factual issues, then the CPUC’s review may include evidentiary proceedings. CPUC rules do not provide for any fixed time period for the CPUC to act on the Settlement Agreement. The CPUC has stated that it will hold an evidentiary hearing in mid-May 2014 and has directed the Settling Parties to hold a community meeting in June 2014 to present the settlement to the public. Pursuant to the CPUC’s rules, no settlement becomes binding on the parties to it unless the CPUC approves the settlement based on a finding that it is reasonable in light of the whole record, consistent with law, and in the public interest. The CPUC has discretion to approve or disapprove a settlement, or to condition its approval on changes to the settlement, which the parties may accept or reject.
	Accordingly, there can be no assurance regarding the timing of any CPUC decision or that the CPUC will approve the Settlement Agreement or refrain from making changes to it that are not acceptable to all the Settling Parties. Thus, there can be no assurance that the OII proceeding will provide for recoveries as currently estimated by SCE in accordance with the Settlement Agreement, including the recovery of costs recorded as a regulatory asset, or that the CPUC does not order refunds to customers above those contemplated by the Settlement Agreement. Therefore, the amount recorded for the San Onofre Regulatory Asset is subject to further change based upon future developments and the application of SCE’s judgment to those events.
	Continuing NRC Proceedings
	As part of the NRC's review of the San Onofre outage and proceedings related to the possible restart of Unit 2, the NRC appointed an Augmented Inspection Team to review SCE's performance. In December 2013, the NRC finalized an Inspection Report in connection with The Augmented Inspection Team’s review and SCE’s response to an earlier NRC Confirmatory Action Letter. The NRC’s report contained a preliminary “white” finding (low to moderate safety significance) and an apparent violation regarding the steam generators in Unit 3 and a preliminary “green” finding (very low safety significance) for Unit 2’s steam generators for failing to ensure that MHI’s modeling and analysis were adequate. The NRC also issued an Inspection Report to MHI containing a Notice of Nonconformance for its flawed computer modeling in the design of San Onofre’s steam generators. In addition, the NRC's Office of Investigations has been conducting an investigation into the accuracy and completeness of information SCE provided to the Augmented Inspection Team. SCE has also been made aware of an investigation related to San Onofre by the NRC's Office of Inspector General, which generally reviews internal NRC affairs. Certain anti-nuclear groups and individual members of Congress have alleged that SCE knew of deficiencies in the steam generators when they were installed or otherwise did not correctly follow NRC requirements in connection with the design and installation of the replacement steam generators, something which SCE has vigorously denied, and have called for investigations, including by the Department of Justice. SCE cannot predict when or whether ongoing inquiries or investigations by the NRC will be completed or whether inquiries by other government agencies will be initiated. Should the NRC find a deficiency in SCE's provision of information, SCE could be subject to additional NRC actions, including the imposition of penalties, and the findings could be taken into consideration in the CPUC regulatory proceedings described above.

Other_Investments

Other Investments	3 Months Ended
	Mar. 31, 2014
Regulated Entity, Other Assets, Noncurrent [Abstract]	'
Other Investments	'
	Other Investments
	Nuclear Decommissioning Trusts
	Future decommissioning costs of removal of SCE's nuclear assets are expected to be funded from independent decommissioning trusts, which currently receive contributions of approximately $23 million per year through SCE customer rates. Contributions to the decommissioning trusts are reviewed every three years by the CPUC.
	The following table sets forth amortized cost and fair value of the trust investments:


		Longest		Amortized Cost					Fair Value
		Maturity
	(in millions)	Dates		March 31,			December 31,		March 31,		December 31, 2013
				2014			2013		2014
	Stocks	—		$	668		$	656	$	2,234	$	2,208

	Municipal bonds	2051		725			675		838		756

	U.S. government and agency securities	2044		812			902		864		947

	Corporate bonds	2054		253			208		296		241

	Short-term investments and receivables/payables	One-year		342			329		355		342

	Total			$	2,800		$	2,770	$	4,587	$	4,494

	Trust fund earnings (based on specific identification) increase the trust fund balance and the ARO regulatory liability. Proceeds from sales of securities (which are reinvested) were $1.50 billion and $435 million for the three months ended March 31, 2014 and 2013, respectively. Unrealized holding gains, net of losses, were $1.79 billion and $1.72 billion at March 31, 2014 and December 31, 2013, respectively.
	The following table sets forth a summary of changes in the fair value of the trust:


			Three months ended March 31,
	(in millions)		2014			2013
	Balance at beginning of period		$	4,494		$	4,048

	Gross realized gains		10			5

	Gross realized losses		—			(1		)

	Unrealized gains, net		62			176

	Other-than-temporary impairments		(3		)	(8		)
	Interest, dividends, contributions and other		24			26

	Balance at end of period		$	4,587		$	4,246

	Due to regulatory mechanisms, earnings (including other-than-temporary impairments) and realized gains and losses have no impact on operating revenue or earnings.

Regulatory_Assets_and_Liabilit

Regulatory Assets and Liabilities	3 Months Ended
	Mar. 31, 2014
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,
		2014			2013
	Current:
	Regulatory balancing accounts	$	883		$	484

	Energy derivatives	48			54

	Total current	931			538

	Long-term:
	Deferred income taxes, net	3,116			2,957

	Pensions and other postretirement benefits	377			369

	Energy derivatives	768			816

	Unamortized investments, net	312			332

	San Onofre	1,371			1,325

	Unamortized loss on reacquired debt	216			222

	Nuclear-related investment, net	33			34

	Regulatory balancing accounts	819			818

	Other	339			368

	Total long-term	7,351			7,241

	Total regulatory assets	$	8,282		$	7,779

	Regulatory Liabilities
	SCE's regulatory liabilities included on the consolidated balance sheets are:


	(in millions)	March 31,			December 31,
		2014			2013
	Current:
	Regulatory balancing accounts	$	417		$	724

	Other	38			43

	Total current	455			767

	Long-term:
	Costs of removal	2,811			2,780

	Asset retirement obligations	1,112			1,071

	Regulatory balancing accounts	1,347			1,132

	San Onofre	371			—

	Other	14			12

	Total long-term	5,655			4,995

Total regulatory liabilities	$	6,110		$	5,762






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,
	2014			2013
Asset (liability)
Energy resource recovery account	$	1,478		$	1,005

Four Corners memorandum account	4			145

New system generation balancing account	99			132

Public purpose programs and energy efficiency programs	(959		)	(1,037		)
Base rate recovery balancing account	(29		)	(247		)
Greenhouse gas auction revenue	(470		)	(385		)
FERC balancing accounts	(13		)	(59		)
Other	(172		)	(108		)
Net liability	$	(62	)	$	(554	)

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2014
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
	SCE believes that the actions taken and costs incurred in connection with the San Onofre replacement steam generators and outages have been prudent. Accordingly, SCE has argued in related CPUC regulatory proceedings that its operating, capital, and market power costs should be recoverable through base rates and the ERRA balancing account (as reduced by the charges recorded in 2013 and 2014). SCE, however, cannot provide assurance that the CPUC will not disallow costs incurred or order refunds to customers of amounts collected in rates, or that SCE will be successful in recovering amounts from third parties. Disallowances of costs and/or refund of amounts received from customers could be material and adversely affect SCE's financial condition, results of operations and cash flows. In March 2014, SCE, in recognition of these risks, entered into a settlement agreement with San Diego Gas & Electric Company, ORA, TURN, FOE and CUE that, if approved by the CPUC, would resolve the disallowance and regulatory recovery issues in accordance with the terms of the agreement. SCE will pursue recoveries from the manufacturer of the replacement steam generators and under San Onofre's insurance, but there is no assurance that SCE will recover all of its applicable costs pursuant to these arrangements. See Note 9 for further details.
	San Gabriel Valley Windstorm Investigation
	In November 2011, a windstorm resulted in significant damage to SCE’s electric system and service outages for SCE customers primarily in the San Gabriel Valley. The CPUC directed its Safety and Enforcement Division (“SED”) to conduct an investigation focused on the cause of the outages, SCE’s service restoration effort, and SCE’s customer communications during the outages. The SED issued its final report on January 11, 2013. The report asserts that SCE and others with whom SCE shares utility poles violated certain CPUC safety rules applicable to overhead line construction, maintenance and operation, which may have caused the failures of affected poles and supporting cables. The report also concludes that SCE’s restoration time was not adequate and makes other assertions. Additionally, the report contends that SCE violated CPUC rules by failing to preserve evidence relevant to the investigation when it did not retain damaged poles that were replaced following the windstorm. In February 2014, SCE entered into agreements with the SED to settle this matter and another, unrelated matter involving SCE's system that occurred in San Bernardino for approximately $24.5 million. In March 2014, the CPUC opened an OII on the 2011 windstorm and the San Bernardino matter and SCE and the SED jointly filed a motion seeking approval of the settlement agreements in this OII. If the settlement agreements are not approved by the CPUC and SCE is found to have violated any CPUC rules, it could be subject to penalties. Absent approval of the two settlement agreements by the CPUC, SCE is unable to estimate a possible loss or range of loss that may be imposed by the CPUC on SCE.
	Four Corners Environmental Matters
	In October 2011, four private environmental organizations filed a CAA citizen lawsuit against the co-owners of Four Corners. The complaint alleges that certain work performed at the Four Corners generating units 4 and 5, over the approximate periods of 1985 – 1986 and 2007 – 2010, constituted plant “major modifications” and the plant's failure to obtain permits and install best available control technology ("BACT") violated the Prevention of Significant Deterioration requirements and the New Source Performance Standards of the CAA. The complaint also alleges subsequent and continuing violations of BACT air emissions limits. The lawsuit seeks injunctive and declaratory relief, civil penalties, including a mitigation project and litigation costs. In November 2012, the parties requested a stay of the litigation to allow for settlement discussion, and the matter is currently stayed. In December 2013, SCE sold its ownership interest in generating units 4 and 5 to APS. Under the sale agreement SCE remains responsible for its pro-rata share of certain environmental liabilities, including penalties in the event they arise from environmental violations prior to the sale. In addition, under the terms of the sale agreement, SCE retains the liability for its proportionate share of expenses occurring as a result of new environmental regulations applicable to the coal ash and combustion residuals deposited at the landfill at Four Corners during the period that SCE held its ownership interest in Four Corners if such new regulations are adopted. SCE is unable to estimate a possible loss or range of loss associated with these matters.
	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, 2014, 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 $112 million, including $73 million related to San Onofre. In addition to these sites, SCE also has 39 immaterial sites for which the total minimum recorded liability was $4 million. Of the $116 million total environmental remediation liability for SCE, $112 million has been recorded as a regulatory asset. SCE expects to recover $37 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 $74 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 $161 million and $7 million, respectively, all of which is related to SCE. 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 four years are expected to range from $6 million to $32 million. Costs incurred for the three months ended March 31, 2014 and 2013 were $1 million and $2 million, respectively.
	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
	Federal law limits public liability claims from a nuclear incident to the amount of available financial protection, which is currently approximately $13.6 billion. SCE and other owners of San Onofre and Palo Verde have purchased the maximum private primary insurance available ($375 million). The balance is covered by a loss sharing program among nuclear reactor licensees. If a nuclear incident at any licensed reactor in the United States results in claims and/or costs which exceed the primary insurance at that plant site, all nuclear reactor licensees could be required to contribute their share of the liability in the form of a deferred premium.
	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. If the public liability limit above is insufficient, federal law contemplates that additional funds may be appropriated by Congress. This could include an additional assessment on all licensed reactor operators as a measure for raising further federal revenue.
	NEIL, a mutual insurance company owned by entities with nuclear facilities, issues primary property damage, decontamination and excess property damage and accidental outage insurance policies. At San Onofre and Palo Verde, property damage insurance covers losses up to $500 million, including decontamination costs. Decontamination liability and excess property damage coverage exceeding the primary $500 million also has been purchased in amounts greater than the federal requirement of a minimum of approximately $1.06 billion. Property damage insurance also covers damages caused by acts of terrorism up to specified limits. Additional outage insurance covers part of replacement power expenses during an accident-related nuclear unit outage. The accidental outage insurance at San Onofre has been canceled as a result of the permanent retirement, but that insurance continues to be in effect at Palo Verde.
	If 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 $52 million per year. Insurance premiums are charged to operating expense.
	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 September 1, 2013, Edison International, renewed its liability insurance coverage, which included coverage for SCE's wildfire liabilities up to a $500 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 (September 1, 2013 to May 31, 2014). SCE also has additional coverage for certain wildfire liabilities of $450 million, which applies when total covered wildfire claims exceed $550 million, through May 31, 2014. 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 did not meet its contractual obligation to begin acceptance of spent nuclear fuel by January 31, 1998. 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 the 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 November 2011. SCE has returned to the San Onofre co-owners their respective shares of the damage award paid. In December 2013, the CPUC approved SCE's proposal to return the SCE share of the award to customers based on the amount that customers actually contributed for fuel storage costs, resulting in approximately $94 million of the SCE share being returned to customers and the remaining $18 million being returned to shareholders. SCE, as operating agent, filed a lawsuit on behalf of the San Onofre owners against the DOE in the Court of Federal Claims in December 2011 seeking damages of approximately $98 million for the DOE's failure to meet its obligation to begin accepting spent nuclear fuel for the period from January 1, 2006 to December 31, 2010. Additional legal action would be necessary to recover damages incurred after December 31, 2010. 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
Preferred and Preference Stock of Utility	Mar. 31, 2014
Preferred And Preference Stock Of Utility Disclosure [Abstract]	'
Preferred and Preference Stock of Utility	'
	Preferred and Preference Stock of Utility
	During the first quarter of 2014, SCE issued 110,004 shares of 5.75% Series H preference stock (cumulative, $2,500 liquidation value) to SCE Trust III, a special purpose entity formed to issue trust securities as discussed in Note 3. The Series H preference stock may be redeemed at par, in whole, but not in part, at any time prior to March 15, 2024 if certain changes in tax or investment company laws occur. After March 15, 2024, SCE may redeem the Series H shares at par, in whole or in part. After March 15, 2024, distributions will accrue and be payable at a floating rate. The shares are not subject to mandatory redemption. The proceeds from the sale of these shares are to be used to repay commercial paper borrowings and for general corporate purposes.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	3 Months Ended
	Mar. 31, 2014
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]	'
Accumulated Other Comprehensive Loss	'
	Accumulated Other Comprehensive Loss
	The changes in accumulated other comprehensive loss, net of tax consist of:


		Edison International						SCE
		Months ended March 31,
	(in millions)	2014			2013			2014			2013
	Beginning balance	$	(13	)	$	(87	)	$	(11	)	$	(29	)
	Pension and PBOP – net loss:
	Other comprehensive loss before reclassifications	—			(2		)	—			(4		)

	Reclassified from accumulated other comprehensive income1	2			2			1			1

	Change	2			—			1			(3		)

	Ending Balance	$	(11	)	$	(87	)	$	(10	)	$	(32	)

	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_

Interest and Other Income and Expenses	3 Months Ended
	Mar. 31, 2014
Other Income and Expenses [Abstract]	'
Interest and Other Income and 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)	2014		2013
	SCE interest and other income:
	Equity allowance for funds used during construction	$	13	$	21

	Increase in cash surrender value of life insurance policies	7		7

	Interest income	2		2

	Other	1		2

	Total SCE interest and other income	23		32

	Edison International Parent and Other other income	—		2

	Total Edison International interest and other income	$	23	$	34

	SCE other expenses:
	Civic, political and related activities and donations	$	5	$	5

	Other	2		5

	Total SCE other expenses	7		10

	Edison International Parent and Other other expenses	1		1

	Total Edison International other expenses	$	8	$	11

Discontinued_Operations

Discontinued Operations	3 Months Ended
Discontinued Operations	Mar. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]	'
Discontinued Operations	'
	Discontinued Operations
	EME Chapter 11 Bankruptcy
	In December 2012, EME and certain of its wholly-owned subsidiaries filed voluntary petitions for relief under Chapter 11 of the Bankruptcy Code in the Bankruptcy Court.
	In February 2014, Edison International, EME and the Consenting Noteholders entered into a Settlement Agreement pursuant to which EME amended its Plan of Reorganization to incorporate the terms of the Settlement Agreement, including extinguishing all existing claims between EME and Edison International. The Amended Plan of Reorganization, including the Settlement Agreement, was approved by the Bankruptcy Court in March 2014 and was completed on April 1, 2014 with the sale of substantially all of EME’s assets to NRG Energy, Inc. and the transactions called for in the Settlement Agreement.
	Under the Amended Plan of Reorganization, EME emerged from bankruptcy free of liabilities but remained an indirect wholly-owned subsidiary of Edison International, which will continue to be consolidated with Edison International for income tax purposes. On April 1, 2014, all of the assets and liabilities of EME that were not otherwise discharged in the bankruptcy or transferred to NRG Energy were transferred to a newly formed trust or entity under the control of EME’s existing creditors (the “Reorganization Trust”), except for (a) EME’s income tax attributes, which are retained by the Edison International consolidated income tax group; (b) certain tax and pension related liabilities in the approximate amount of $350 million, which have been assumed by Edison International and for substantially all of which Edison International had joint and several responsibility; and (c) EME’s indirect interest in Capistrano Wind Partners and a small hydroelectric project.
	Edison International has agreed to pay to the Reorganization Trust an amount equal to 50% of EME’s federal and California income tax benefits, which were not previously paid to EME under a tax allocation agreement between Edison International and EME that expired on December 31, 2013 ("EME Tax Attributes") and which are estimated to be approximately $1.191 billion, subject to an estimate updating procedure set forth in the Settlement Agreement that is expected to take up to approximately six months from April 1, 2014. On April 1, 2014, Edison International paid the Reorganization Trust $225 million in cash and the balance will be paid in two installment payments to be made on September 30, 2015 and 2016, respectively. The amount of the two installment payments with interest of 5% per annum from April 1, 2014 will be fixed once the estimate of the EME Tax Attributes is completed but are currently estimated to be approximately $199 million and $210 million, respectively, including applicable interest. Assuming continuation of existing law and tax rates, Edison International also anticipates realization of the tax benefits over a period similar to the period for which it pays for them. Extension of bonus depreciation could defer realization of the benefits, and reduction of federal income tax rates could permanently reduce them. Pending the realization of the tax benefits, Edison International will finance the settlement from existing credit lines.
	EME and the Reorganization Trust released Edison International and its subsidiaries, officers, directors, and representatives from all claims, except for those deriving from commercial arrangements between SCE and certain EME subsidiaries and for obligations arising under the Settlement Agreement. Edison International and its subsidiaries that directly and indirectly own EME provided a similar release to EME and the Reorganization Trust. Under the Amended Plan of Reorganization, Edison International and its subsidiaries are also the beneficiaries of orders of the Bankruptcy Court releasing them from claims of third parties in EME’s bankruptcy proceeding. As required in the Settlement Agreement, the Reorganization Trust set aside $50 million in escrow to secure its obligations to Edison International, including its obligation to protect against liabilities, if any, not discharged in the bankruptcy for which the Reorganization Trust remains responsible. Such escrowed amount will decline over time to zero on September 30, 2016.
	The final estimate of EME Tax Attributes, which will fix Edison International’s installment obligations to the Reorganization Trust, may differ materially from the current estimate. Subject to the final determination of the EME Tax Attributes under the Settlement Agreement, Edison International anticipates that consolidated tax benefits it will retain will exceed the sum of liabilities it will assume and payments to the Reorganization Trust by approximately $200 million, and that the transactions contemplated by the Settlement Agreement, will result in its recording approximately $152 million in income in the second quarter of 2014, which is net of amounts recorded through March 31, 2014. Edison International has recorded deferred income tax benefits from EME, less a valuation allowance for amounts that would no longer be available had there been a tax deconsolidation of EME in the bankruptcy of approximately $198 million, and a $150 million provision for loss related to Edison International claims that had been filed against EME in the bankruptcy. The net impact of these items has been approximately $48 million through March 31, 2014 and recorded as part of discontinued operations.
	As the transactions called for in the Settlement Agreement closed on April 1, 2014, it is accounted for as a subsequent event under GAAP and not reflected in the first quarter 2014 financial statements (referred to as a "Type II" subsequent event).

Supplemental_Cash_Flows_Inform

Supplemental Cash Flows Information	3 Months Ended
	Mar. 31, 2014
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)	2014		2013		2014		2013
	Cash payments (receipts) for interest and taxes:
	Interest, net of amounts capitalized	$	157	$	167	$	149	$	159

	Tax payments (refunds), net	—		6		3		(3		)

	Non-cash financing and investing activities:
	Dividends declared but not paid:
	Common stock	$	116	$	110	$	126	$	—

	Preferred and preference stock	4		7		4		7

	SCE's accrued capital expenditures at March 31, 2014 and 2013 were $438 million and $507 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_Account1

Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Mar. 31, 2014
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 subsidiaries that are engaged in competitive businesses related to the delivery or use of electricity. 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 2013 Form 10-K. The same accounting policies are followed for interim reporting purposes, with the exception of accounting principles adopted as of January 1, 2014, discussed below in "—New Accounting Guidance." This quarterly report should be read in conjunction with the financial statements and notes included in the 2013 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, 2014 are not necessarily indicative of the operating results for the full year.
	The December 31, 2013 condensed consolidated balance sheet 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 is temporarily invested until required for check clearing from the primary disbursement accounts.
	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 in 2014
	In July 2013, the FASB issued an accounting standards update that requires that an unrecognized tax benefit be presented on the balance sheet as a reduction of a deferred tax asset for a net operating loss ("NOL") or tax credit carryforward under certain circumstances. Edison International and SCE adopted this guidance effective January 1, 2014 and it did not have a material impact on the consolidated financial statements.
	Accounting Guidance Not Yet Adopted
	In April 2014, the FASB issued an accounting standards update which will reduce the number of disposals that qualify for reporting as a discontinued operation and will also increase the associated disclosure. Under the new guidance, only disposals representing a strategic shift in operations should be presented as discontinued operations. In addition, this update also requires disclosure of the pre-tax income attributable to a disposal of a significant part of an organization that does not qualify for discontinued operations reporting. Edison International and SCE will adopt this guidance prospectively effective January 1, 2015.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Cash Equivalents	'
	The cash equivalents were as follows:


		Edison International				SCE
	(in millions)	March 31,		December 31, 2013		March 31,		December 31, 2013
		2014				2014
	Money market funds	$	67	$	68	$	6	$	8

	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, 2013		March 31,		December 31, 2013
		2014				2014
	Cash reclassified to accounts payable	$	149	$	168	$	148	$	163

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)	2014		2013
	Basic earnings per share – continuing operations:
	Income from continuing operations available to common shareholders	$	198	$	259

	Weighted average common shares outstanding	326		326

	Basic earnings per share – continuing operations	$	0.61	$	0.79

	Diluted earnings per share – continuing operations:
	Income from continuing operations available to common shareholders	$	198	$	259

	Income impact of assumed conversions	—		—

	Income from continuing operations available to common shareholders and assumed conversions	$	198	$	259

	Weighted average common shares outstanding	326		326

	Incremental shares from assumed conversions	3		3

	Adjusted weighted average shares – diluted	329		329

	Diluted earnings per share – continuing operations	$	0.61	$	0.78

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Equity (Tables)	3 Months Ended
	Mar. 31, 2014
Statement of Stockholders' Equity [Abstract]	'
Schedule of changes in equity	'
	The following table provides Edison International's changes in equity for the three months ended March 31, 2014:


		Equity Attributable to Edison International															Noncontrolling Interests
	(in millions)	Common			Accumulated				Retained				Subtotal				Preferred				Total
		Stock			Other				Earnings								and				Equity
					Comprehensive												Preference
					Loss												Stock
	Balance at December 31, 2013	$	2,403		$	(13	)		$	7,548			$	9,938			$	1,753			$	11,691

	Net income	—			—				176				176				26				202

	Other comprehensive income	—			2				—				2				—				2

	Common stock dividends declared ($0.355 per share)	—			—				(116		)		(116		)		—				(116		)

	Dividends, distributions to noncontrolling interests	—			—				—				—				(26		)		(26		)

	Stock-based compensation and other	9			—				(50		)		(41		)		—				(41		)

	Non-cash stock-based compensation and other	5			—				15				20				—				20

	Issuance of preference stock	—			—				—				—				270				270

	Balance at March 31, 2014	$	2,417		$	(11	)		$	7,573			$	9,979			$	2,023			$	12,002

	The following table provides Edison International's changes in equity for the three months ended March 31, 2013:


		Equity Attributable to Edison International															Noncontrolling Interests
	(in millions)	Common			Accumulated				Retained				Subtotal				Preferred				Total
		Stock			Other				Earnings								and				Equity
					Comprehensive												Preference
					Loss												Stock
	Balance at December 31, 2012	$	2,373		$	(87	)		$	7,146			$	9,432			$	1,759			$	11,191

	Net income	—			—				271				271				27				298

	Common stock dividends declared ($0.3375 per share)	—			—				(110		)		(110		)		—				(110		)

	Dividends, distributions to noncontrolling interests	—			—				—				—				(27		)		(27		)

	Stock-based compensation and other	1			—				(33		)		(32		)		—				(32		)

	Non-cash stock-based compensation and other	6			—				(4		)		2				—				2

	Issuance of preference stock	—			—				—				—				387				387

	Redemption of preference stock	—			—				(8		)		(8		)		(392		)		(400		)

	Balance at March 31, 2013	$	2,380		$	(87	)		$	7,262			$	9,555			$	1,754			$	11,309

	The following table provides SCE's changes in equity for the three months ended March 31, 2014:


		Equity Attributable to SCE
	(in millions)	Common			Additional				Accumulated				Retained				Preferred				Total
		Stock			Paid-in				Other				Earnings				and				Equity
					Capital				Comprehensive								Preference
									Loss								Stock
	Balance at December 31, 2013	$	2,168		$	592			$	(11	)		$	7,594			$	1,795			$	12,138

	Net income	—			—				—				234				—				234

Other comprehensive income	—			—				1				—				—				1

Dividends declared on common stock	—			—				—				(126		)		—				(126		)

Dividends on preferred and preference stock	—			—				—				(26		)		—				(26		)

Stock-based compensation and other	—			9				—				(31		)		—				(22		)

Non-cash stock-based compensation and other	—			2				—				10				—				12

Issuance of preference stock	—			(5		)		—				—				275				270

Balance at March 31, 2014	$	2,168		$	598			$	(10	)		$	7,655			$	2,070			$	12,481

The following table provides SCE's changes in equity for the three months ended March 31, 2013:


	Equity Attributable to SCE
(in millions)	Common			Additional				Accumulated				Retained				Preferred				Total
	Stock			Paid-in				Other				Earnings				and				Equity
				Capital				Comprehensive								Preference
								Loss								Stock
Balance at December 31, 2012	$	2,168		$	581			$	(29	)		$	7,228			$	1,795			$	11,743

Net income	—			—				—				283				—				283

Other comprehensive income	—			—				(3		)		—				—				(3		)

Dividends declared on common stock	—			—				—				(120		)		—				(120		)

Dividends on preferred and preference stock	—			—				—				(27		)		—				(27		)

Stock-based compensation and other	—			—				—				(29		)		—				(29		)

Non-cash stock-based compensation and other	—			3				—				5				—				8

Issuance of preference stock	—			(13		)		—				—				400				387

Redemption of preference stock	—			8				—				(8		)		(400		)		(400		)

Balance at March 31, 2013	$	2,168		$	579			$	(32	)		$	7,332			$	1,795			$	11,842

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
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, 2014
	(in millions)	Level 1				Level 2				Level 3			Netting			Total
													and
													Collateral1
	Assets at fair value
	Derivative contracts	$	—			$	20			$	345		$	(13	)	$	352

	Other	38				—				—			—			38

	Nuclear decommissioning trusts:
	Stocks2	2,234				—				—			—			2,234

	Fixed Income3	777				1,221				—			—			1,998

	Short-term investments, primarily cash equivalents	335				75				—			—			410

	Subtotal of nuclear decommissioning trusts4	3,346				1,296				—			—			4,642

	Total assets	3,384				1,316				345			(13		)	5,032

	Liabilities at fair value
	Derivative contracts	—				29				1,118			(19		)	1,128

	Total liabilities	—				29				1,118			(19		)	1,128

	Net assets (liabilities)	$	3,384			$	1,287			$	(773	)	$	6		$	3,904



		December 31, 2013
	(in millions)	Level 1				Level 2				Level 3			Netting			Total
													and
													Collateral1
	Assets at fair value
	Derivative contracts	$	—			$	11			$	372		$	(10	)	$	373

	Other	39				—				—			—			39

	Nuclear decommissioning trusts:
	Stocks2	2,208				—				—			—			2,208

	Fixed Income3	841				1,102				—			—			1,943

	Short-term investments, primarily cash equivalents	331				—				—			—			331

	Subtotal of nuclear decommissioning trusts4	3,380				1,102				—			—			4,482

	Total assets	3,419				1,113				372			(10		)	4,894

	Liabilities at fair value
	Derivative contracts	—				37				1,177			(20		)	1,194

	Total liabilities	—				37				1,177			(20		)	1,194

	Net assets (liabilities)	$	3,419			$	1,076			$	(805	)	$	10		$	3,700


	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 March 31, 2014 and December 31, 2013, respectively.

3	At March 31, 2014 and December 31, 2013, SCE's corporate bonds were diversified and included collateralized mortgage obligations and other asset backed securities of $46 million and $47 million, respectively.

4	Excludes net payables of $55 million and net receivables of $12 million at March 31, 2014 and December 31, 2013, respectively, 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)		2014				2013
	Fair value of net liabilities at beginning of period		$	(805	)		$	(791	)
	Total realized/unrealized gains (losses):
	Included in regulatory assets and liabilities1		31				(82		)

	Purchases		7				18

	Settlements		(6		)		(27		)
	Fair value of net liabilities at end of period		$	(773	)		$	(882	)
	Change during the period in unrealized gains and losses related to assets and liabilities held at the end of the period		$	22			$	(66	)


	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
	31-Mar-14	$	345			$	—		Market simulation model	Load forecast	7,603 MW - 24,896 MW

										Power prices	$(9.86) - $108.56
										Gas prices	$3.50 - $7.10
	31-Dec-13	366				—			Market simulation model	Load forecast	7,603 MW - 24,896 MW

										Power prices	$(9.86) - $108.56
										Gas prices	$3.50 - $7.10
	Tolling
	31-Mar-14	4				1,111			Option model	Volatility of gas prices	13% - 31% (18%)

										Volatility of power prices	26% - 61% (32%)
										Power prices	$37.50 - $70.80 ($50.10)
	31-Dec-13	5				1,175			Option model	Volatility of gas prices	16% - 35% (21%)

										Volatility of power prices	25% - 45% (30%)
										Power prices	$38.00 - $63.90 ($47.40)
Carrying Amounts and Fair Values of Long-term Debt, Including Current Portion	'
	The carrying value and fair value of Edison International and SCE's long-term debt (including current portion of long-term debt) are as follows:


			March 31, 2014								December 31, 2013
	(in millions)		Carrying				Fair				Carrying			Fair
			Value				Value				Value			Value
	SCE		$	10,023			$	11,012			$	10,022		$	10,656

	Edison International		10,426				11,442				10,426			11,084

Derivative_Instruments_Tables

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2014
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, 2014
			Derivative Assets									Derivative Liabilities
	(in millions)		Short-Term			Long-Term			Subtotal			Short-Term			Long-Term			Subtotal			Net
																					Liability
	Commodity derivative contracts
	Gross amounts recognized		$	135		$	240		$	375		$	170		$	987		$	1,157		$	782

	Gross amounts offset in the consolidated balance sheets		(23		)	—			(23		)	(23		)	—			(23		)	—

	Cash collateral posted1		—			—			—			(4		)	(2		)	(6		)	(6		)

	Net amounts presented in the consolidated balance sheets		$	112		$	240		$	352		$	143		$	985		$	1,128		$	776



			December 31, 2013
			Derivative Assets									Derivative Liabilities
	(in millions)		Short-Term			Long-Term			Subtotal			Short-Term			Long-Term			Subtotal			Net
																					Liability
	Commodity derivative contracts
	Gross amounts recognized		$	141		$	251		$	392		$	178		$	1,045		$	1,223		$	831

	Gross amounts offset in the consolidated balance sheets		(19		)	—			(19		)	(19		)	—			(19		)	—

	Cash collateral posted1		—			—			—			(7		)	(3		)	(10		)	(10		)

	Net amounts presented in the consolidated balance sheets		$	122		$	251		$	373		$	152		$	1,042		$	1,194		$	821


	1	In addition, at March 31, 2014 and December 31, 2013, SCE had posted $7 million and $19 million, respectively, of collateral that is not offset against derivative liabilities and is reflected in "Other current assets" on the consolidated balance sheets.
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,		December 31, 2013
					2014
	Electricity options, swaps and forwards		GWh		5,086		6,274

	Natural gas options, swaps and forwards		Bcf		8		12

	Congestion revenue rights		GWh		135,714		149,234

	Tolling arrangements		GWh		86,248		87,991

Southern California Edison	'
Derivative Instruments and Hedging Activities Disclosures [Line Items]	'
Summarization of Economic Hedging Activities	'
	The following table summarizes the components of SCE's economic hedging activity:


			Three months ended March 31,
	(in millions)		2014			2013
	Realized losses		$	(37	)	$	(16	)
	Unrealized gains (losses)		52			(54		)

Income_Taxes_Tables

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2014
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)	2014			2013			2014			2013
	Income from continuing operations before income taxes	$	205		$	384		$	222		$	395

	Provision for income tax at federal statutory rate of 35%	71			134			78			138

	Increase (decrease) in income tax from:
	State tax, net of federal benefit	1			3			1			14

	Property-related	(51		)	(41		)	(51		)	(42		)
	Change related to uncertain tax positions	7			7			7			7

	San Onofre settlement	(40		)	—			(40		)	—

	Other	(7		)	(5		)	(7		)	(5		)
	Total income tax expense (benefit) from continuing operations	$	(19	)	$	98		$	(12	)	$	112

	Effective tax rate	(9.3		)%	25.5		%	(5.4		)%	28.4		%

Compensation_and_Benefit_Plans1

Compensation and Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2014
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, 2014		$	54

	Additions		—

	Payments		(10		)
	Balance at March 31, 2014		$	44

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)	2014				2013			2014			2013
	Service cost	$	30			$	38		$	29		$	37

	Interest cost	45				42			44			41

	Expected return on plan assets	(57		)		(57		)	(56		)	(57		)
	Amortization of prior service cost	1				1			1			1

	Amortization of net loss1	1				15			—			14

	Expense under accounting standards	$	20			$	39		$	18		$	36

	Regulatory adjustment	31				17			31			17

	Total expense recognized	$	51			$	56		$	49		$	53


	1	Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International and SCE was $2 million and $1 million for the three months ended March 31, 2014, respectively, and $3 million and $2 million for the three months ended March 31, 2013, respectively.
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)	2014				2013			2014			2013
	Service cost	$	11			$	14		$	11		$	13

	Interest cost	27				26			27			26

	Expected return on plan assets	(28		)		(30		)	(28		)	(30		)
	Amortization of prior service credit	(9		)		(9		)	(9		)	(9		)
	Amortization of net loss	—				7			—			7

	Total expense	$	1			$	8		$	1		$	7

Other_Investments_Tables

Other Investments (Tables)	3 Months Ended
	Mar. 31, 2014
Regulated Entity, Other Assets, Noncurrent [Abstract]	'
Amortized Cost and Fair Value of the Trust Investments	'
	The following table sets forth amortized cost and fair value of the trust investments:


		Longest		Amortized Cost					Fair Value
		Maturity
	(in millions)	Dates		March 31,			December 31,		March 31,		December 31, 2013
				2014			2013		2014
	Stocks	—		$	668		$	656	$	2,234	$	2,208

	Municipal bonds	2051		725			675		838		756

	U.S. government and agency securities	2044		812			902		864		947

	Corporate bonds	2054		253			208		296		241

	Short-term investments and receivables/payables	One-year		342			329		355		342

	Total			$	2,800		$	2,770	$	4,587	$	4,494

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)		2014			2013
	Balance at beginning of period		$	4,494		$	4,048

	Gross realized gains		10			5

	Gross realized losses		—			(1		)

	Unrealized gains, net		62			176

	Other-than-temporary impairments		(3		)	(8		)
	Interest, dividends, contributions and other		24			26

	Balance at end of period		$	4,587		$	4,246

Regulatory_Assets_and_Liabilit1

Regulatory Assets and Liabilities (Tables)	3 Months Ended
	Mar. 31, 2014
Regulatory Assets and Liabilities Disclosure [Abstract]	'
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,
		2014		2013
	Current:
	Regulatory balancing accounts	$	883	$	484

	Energy derivatives	48		54

	Total current	931		538

	Long-term:
	Deferred income taxes, net	3,116		2,957

	Pensions and other postretirement benefits	377		369

	Energy derivatives	768		816

	Unamortized investments, net	312		332

	San Onofre	1,371		1,325

	Unamortized loss on reacquired debt	216		222

	Nuclear-related investment, net	33		34

	Regulatory balancing accounts	819		818

	Other	339		368

	Total long-term	7,351		7,241

	Total regulatory assets	$	8,282	$	7,779

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,
		2014		2013
	Current:
	Regulatory balancing accounts	$	417	$	724

	Other	38		43

	Total current	455		767

	Long-term:
	Costs of removal	2,811		2,780

	Asset retirement obligations	1,112		1,071

	Regulatory balancing accounts	1,347		1,132

	San Onofre	371		—

	Other	14		12

	Total long-term	5,655		4,995

	Total regulatory liabilities	$	6,110	$	5,762

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	3 Months Ended
	Mar. 31, 2014
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]	'
Components of Accumulated Other Comprehensive Loss	'
	The changes in accumulated other comprehensive loss, net of tax consist of:


		Edison International						SCE
		Months ended March 31,
	(in millions)	2014			2013			2014			2013
	Beginning balance	$	(13	)	$	(87	)	$	(11	)	$	(29	)
	Pension and PBOP – net loss:
	Other comprehensive loss before reclassifications	—			(2		)	—			(4		)

	Reclassified from accumulated other comprehensive income1	2			2			1			1

	Change	2			—			1			(3		)

	Ending Balance	$	(11	)	$	(87	)	$	(10	)	$	(32	)

	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_1

Interest and Other Income and Expenses (Tables)	3 Months Ended
	Mar. 31, 2014
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)	2014		2013
	SCE interest and other income:
	Equity allowance for funds used during construction	$	13	$	21

	Increase in cash surrender value of life insurance policies	7		7

	Interest income	2		2

	Other	1		2

	Total SCE interest and other income	23		32

	Edison International Parent and Other other income	—		2

	Total Edison International interest and other income	$	23	$	34

	SCE other expenses:
	Civic, political and related activities and donations	$	5	$	5

	Other	2		5

	Total SCE other expenses	7		10

	Edison International Parent and Other other expenses	1		1

	Total Edison International other expenses	$	8	$	11

Supplemental_Cash_Flows_Inform1

Supplemental Cash Flows Information (Tables)	3 Months Ended
	Mar. 31, 2014
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)	2014		2013		2014		2013
	Cash payments (receipts) for interest and taxes:
	Interest, net of amounts capitalized	$	157	$	167	$	149	$	159

	Tax payments (refunds), net	—		6		3		(3		)

	Non-cash financing and investing activities:
	Dividends declared but not paid:
	Common stock	$	116	$	110	$	126	$	—

	Preferred and preference stock	4		7		4		7

Summary_of_Significant_Account3

Summary of Significant Accounting Policies (Details) (Southern California Edison, Electric Utility)	3 Months Ended
	Mar. 31, 2014
	sqmi
Southern California Edison \| Electric Utility	'
Summary of Significant Accounting Policies [Line Items]	'
Supply of electricity, area covered (square mile)	50,000

Summary_of_Significant_Account4

Summary of Significant Accounting Policies (Cash) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Cash and Cash Equivalents Items [Line Items]	'	'
Maximum maturity period of cash equivalent investments (in months)	'3 months	'
Money market funds	$67	$68
Cash reclassified to accounts payable	149	168
Southern California Edison	'	'
Cash and Cash Equivalents Items [Line Items]	'	'
Money market funds	6	8
Cash reclassified to accounts payable	$148	$163

Summary_of_Significant_Account5

Summary of Significant Accounting Policies (Earnings Per Share) (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Basic earnings per share - continuing operations:	'	'
Income from continuing operations, net of tax	$198	$259
Weighted average common shares outstanding (in shares)	326,000,000	326,000,000
Basic earnings per share b continuing operations (in dollars per share)	$0.61	$0.79
Diluted earnings per share - continuing operations:	'	'
Income from continuing operations, net of tax	198	259
Income impact of assumed conversions	0	0
Income from continuing operations available to common shareholders and assumed conversions	$198	$259
Weighted average common shares outstanding (in shares)	326,000,000	326,000,000
Incremental shares from assumed conversions (in shares)	3,000,000	3,000,000
Adjusted weighted average shares - diluted (in shares)	329,000,000	329,000,000
Diluted earnings per share b continuing operations (in dollars per share)	$0.61	$0.78
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)	2,050,449	4,455,669

Consolidated_Statements_of_Cha2

Consolidated Statements of Changes in Equity (Details) (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'
Balance, at the beginning of the period	$11,691	$11,191
Net income	202	298
Other comprehensive income (loss)	2	0
Common stock dividends declared	-116	-110
Dividends, distributions to noncontrolling interests and other	-26	-27
Stock-based compensation and other	-41	-32
Noncash stock-based compensation and other	20	2
Issuance of preference stock	270	387
Redemption of preference stock	'	-400
Balance, at the end of the period	12,002	11,309
Dividends declared per common share (in dollars per share)	$0.36	$0.34
Common Stock Including Additional Paid in Capital	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'
Balance, at the beginning of the period	2,403	2,373
Net income	0	0
Other comprehensive income (loss)	0	'
Common stock dividends declared	0	0
Dividends, distributions to noncontrolling interests and other	0	0
Stock-based compensation and other	9	1
Noncash stock-based compensation and other	5	6
Issuance of preference stock	0	0
Redemption of preference stock	'	0
Balance, at the end of the period	2,417	2,380
Accumulated Other Comprehensive Loss	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'
Balance, at the beginning of the period	-13	-87
Net income	0	0
Other comprehensive income (loss)	2	'
Common stock dividends declared	0	0
Dividends, distributions to noncontrolling interests and other	0	0
Stock-based compensation and other	0	0
Noncash stock-based compensation and other	0	0
Issuance of preference stock	0	0
Redemption of preference stock	'	0
Balance, at the end of the period	-11	-87
Retained Earnings	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'
Balance, at the beginning of the period	7,548	7,146
Net income	176	271
Other comprehensive income (loss)	0	'
Common stock dividends declared	-116	-110
Dividends, distributions to noncontrolling interests and other	0	0
Stock-based compensation and other	-50	-33
Noncash stock-based compensation and other	15	-4
Issuance of preference stock	0	0
Redemption of preference stock	'	-8
Balance, at the end of the period	7,573	7,262
Subtotal	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'
Balance, at the beginning of the period	9,938	9,432
Net income	176	271
Other comprehensive income (loss)	2	'
Common stock dividends declared	-116	-110
Dividends, distributions to noncontrolling interests and other	0	0
Stock-based compensation and other	-41	-32
Noncash stock-based compensation and other	20	2
Issuance of preference stock	0	0
Redemption of preference stock	'	-8
Balance, at the end of the period	9,979	9,555
Preferred Stock and Preference Stock	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'
Balance, at the beginning of the period	1,753	1,759
Net income	26	27
Other comprehensive income (loss)	0	'
Common stock dividends declared	0	0
Dividends, distributions to noncontrolling interests and other	-26	-27
Stock-based compensation and other	0	0
Noncash stock-based compensation and other	0	0
Issuance of preference stock	270	387
Redemption of preference stock	'	-392
Balance, at the end of the period	2,023	1,754
Southern California Edison	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'
Balance, at the beginning of the period	12,138	11,743
Net income	234	283
Other comprehensive income (loss)	1	-3
Common stock dividends declared	-126	-120
Dividends on preferred and preference stock	-26	-27
Stock-based compensation and other	-22	-29
Noncash stock-based compensation and other	12	8
Issuance of preference stock	270	387
Redemption of preference stock	'	-400
Balance, at the end of the period	12,481	11,842
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 (loss)	0	0
Common stock dividends declared	0	0
Dividends on preferred and preference stock	0	0
Stock-based compensation and other	0	0
Noncash stock-based compensation and other	0	0
Issuance of preference stock	0	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	592	581
Net income	0	0
Other comprehensive income (loss)	0	0
Common stock dividends declared	0	0
Dividends on preferred and preference stock	0	0
Stock-based compensation and other	9	0
Noncash stock-based compensation and other	2	3
Issuance of preference stock	-5	-13
Redemption of preference stock	'	8
Balance, at the end of the period	598	579
Southern California Edison \| Accumulated Other Comprehensive Loss	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'
Balance, at the beginning of the period	-11	-29
Net income	0	0
Other comprehensive income (loss)	1	-3
Common stock dividends declared	0	0
Dividends on preferred and preference stock	0	0
Stock-based compensation and other	0	0
Noncash stock-based compensation and other	0	0
Issuance of preference stock	0	0
Redemption of preference stock	'	0
Balance, at the end of the period	-10	-32
Southern California Edison \| Retained Earnings	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'
Balance, at the beginning of the period	7,594	7,228
Net income	234	283
Other comprehensive income (loss)	0	0
Common stock dividends declared	-126	-120
Dividends on preferred and preference stock	-26	-27
Stock-based compensation and other	-31	-29
Noncash stock-based compensation and other	10	5
Issuance of preference stock	0	0
Redemption of preference stock	'	-8
Balance, at the end of the period	7,655	7,332
Southern California Edison \| Preferred Stock and Preference Stock	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'
Balance, at the beginning of the period	1,795	1,795
Net income	0	0
Other comprehensive income (loss)	0	0
Common stock dividends declared	0	0
Dividends on preferred and preference stock	0	0
Stock-based compensation and other	0	0
Noncash stock-based compensation and other	0	0
Issuance of preference stock	275	400
Redemption of preference stock	'	-400
Balance, at the end of the period	$2,070	$1,795

Variable_Interest_Entities_Det

Variable Interest Entities (Details) (Southern California Edison, USD $)

3 Months Ended

1 Months Ended

3 Months Ended

1 Months Ended

3 Months Ended

Mar. 31, 2014

Mar. 31, 2013

31-May-12

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

31-May-12

Mar. 31, 2014

Mar. 31, 2013

Jan. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Jan. 31, 2013

Mar. 31, 2014

Mar. 31, 2013

SCE Trust I

SCE Trust II

SCE Trust III

Variable Interest Entity, Not Primary Beneficiary

Trust Securities

Series F Preferred Stock

Trust Securities

Series G Preferred Stock

Trust Securities

Series H Preferred Stock

SCE Power Purchase Contracts

Details of projects or entities

Power generating capacity (in megawatts)

5,641

3,578

Payments to unconsolidated VIEs for power purchase contracts

$125,000,000

$98,000,000

Unconsolidated Trust

Security dividend rate, (as a percent)

5.63%

5.10%

5.75%

Liquidation preference

475,000,000

400,000,000

275,000,000

Liquidation value (in dollars per share)

$25

$2,500

$25

$2,500

$25

$2,500

Common stock

10,000

Dividend income and distributions

$7,000,000

$5,000,000

$4,000,000

$1,000,000

Fair_Value_Measurements_Fair_V

Fair Value Measurements (Fair Value by Level) (Details) (USD $)	Mar. 31, 2014		Dec. 31, 2013		Mar. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013		Mar. 31, 2013	Dec. 31, 2012
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	$4,587		$4,494		'	'
Liabilities at Fair Value	'		'		'	'
Money market funds	67		68		'	'
Southern California Edison	'		'		'	'
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	4,587		4,494		4,246	4,048
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	46		47		'	'
Receivables (payables) net related to investments	-55		12		'	'
Money market funds	6		8		'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Level 1	'		'		'	'
Assets at Fair Value	'		'		'	'
Derivative contracts	0		0		'	'
Other	38		39		'	'
Nuclear decommissioning trusts	3,346	[1]	3,380	[1]	'	'
Total assets	3,384		3,419		'	'
Liabilities at Fair Value	'		'		'	'
Derivative contracts	0		0		'	'
Total liabilities	0		0		'	'
Net assets (liabilities)	3,384		3,419		'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Level 1 \| Stocks	'		'		'	'
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	2,234	[2]	2,208	[2]	'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Level 1 \| Fixed income	'		'		'	'
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	777	[3]	841	[3]	'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Level 1 \| Short-term investments, primarily cash equivalents	'		'		'	'
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	335		331		'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Level 2	'		'		'	'
Assets at Fair Value	'		'		'	'
Derivative contracts	20		11		'	'
Other	0		0		'	'
Nuclear decommissioning trusts	1,296	[1]	1,102	[1]	'	'
Total assets	1,316		1,113		'	'
Liabilities at Fair Value	'		'		'	'
Derivative contracts	29		37		'	'
Total liabilities	29		37		'	'
Net assets (liabilities)	1,287		1,076		'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Level 2 \| Stocks	'		'		'	'
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	0	[2]	0	[2]	'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Level 2 \| Fixed income	'		'		'	'
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	1,221	[3]	1,102	[3]	'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Level 2 \| Short-term investments, primarily cash equivalents	'		'		'	'
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	75		0		'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Level 3	'		'		'	'
Assets at Fair Value	'		'		'	'
Derivative contracts	345		372		'	'
Other	0		0		'	'
Nuclear decommissioning trusts	0	[1]	0	[1]	'	'
Total assets	345		372		'	'
Liabilities at Fair Value	'		'		'	'
Derivative contracts	1,118		1,177		'	'
Total liabilities	1,118		1,177		'	'
Net assets (liabilities)	-773		-805		'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Level 3 \| Stocks	'		'		'	'
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	0	[2]	0	[2]	'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Level 3 \| Fixed income	'		'		'	'
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	0	[3]	0	[3]	'	'
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 \| Netting and Collateral	'		'		'	'
Assets at Fair Value	'		'		'	'
Derivative contracts	-13		-10		'	'
Other	0	[4]	0	[4]	'	'
Nuclear decommissioning trusts	0	[1],[4]	0	[1],[4]	'	'
Total assets	-13	[4]	-10	[4]	'	'
Liabilities at Fair Value	'		'		'	'
Derivative contracts	-19		-20		'	'
Total liabilities	-19	[4]	-20	[4]	'	'
Net assets (liabilities)	6	[4]	10	[4]	'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Netting and Collateral \| Stocks	'		'		'	'
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	0	[2],[4]	0	[2],[4]	'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Netting and Collateral \| Fixed income	'		'		'	'
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	0	[3],[4]	0	[3],[4]	'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Netting and Collateral \| Short-term investments, primarily cash equivalents	'		'		'	'
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	0	[4]	0	[4]	'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Total	'		'		'	'
Assets at Fair Value	'		'		'	'
Derivative contracts	352		373		'	'
Other	38		39		'	'
Nuclear decommissioning trusts	4,642	[1]	4,482	[1]	'	'
Total assets	5,032		4,894		'	'
Liabilities at Fair Value	'		'		'	'
Derivative contracts	1,128		1,194		'	'
Total liabilities	1,128		1,194		'	'
Net assets (liabilities)	3,904		3,700		'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Total \| Stocks	'		'		'	'
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	2,234	[2]	2,208	[2]	'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Total \| Fixed income	'		'		'	'
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	1,998	[3]	1,943	[3]	'	'
Southern California Edison \| Fair Value, Measurements, Recurring \| Total \| Short-term investments, primarily cash equivalents	'		'		'	'
Assets at Fair Value	'		'		'	'
Nuclear decommissioning trusts	$410		$331		'	'

[1]	Excludes net payables of $55 million and net receivables of $12 million at MarchB 31, 2014 and DecemberB 31, 2013, respectively, of interest and dividend receivables as well as receivables and payables related to SCE's pending securities sales and purchases.
[2]	Approximately 70% of SCE's equity investments were located in the United States at MarchB 31, 2014 and DecemberB 31, 2013, respectively.
[3]	At MarchB 31, 2014 and DecemberB 31, 2013, SCE's corporate bonds were diversified and included collateralized mortgage obligations and other asset backed securities of $46 million and $47 million, respectively.
[4]	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.

Fair_Value_Measurements_Level_

Fair Value Measurements (Level 3 Rollforward) (Details) (Southern California Edison, Level 3, USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Southern California Edison \| Level 3	'		'
Fair Value Disclosures Level 3 [Roll Forward]	'		'
Fair value of net asset (liabilities) at beginning of period	($805)		($791)
Total realized/unrealized gains (losses):	'		'
Included in regulatory assets and liabilities	31	[1]	-82	[1]
Purchases	7		18
Settlements	-6		-27
Fair value of net liabilities at end of period	-773		-882
Change during the period in unrealized losses related to assets and liabilities held at the end of the period	$22		($66)

[1]	Due to regulatory mechanisms, SCE's realized and unrealized gains and losses are recorded as regulatory assets and liabilities.

Fair_Value_Measurements_Quanti

Fair Value Measurements (Quantitative Information About Level 3 Fair Value Measurements) (Details) (Level 3, USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
	MW	MW
Congestion Revenue Rights \| Market Simulation Model	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Fair Value, Assets	345,000,000	366,000,000
Fair Value, Liabilities	0	0
Congestion Revenue Rights \| Market Simulation Model \| Load Forecast \| Minimum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Fair value inputs, power units (in megawatts)	7,603	7,603
Congestion Revenue Rights \| Market Simulation Model \| Load Forecast \| Maximum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Fair value inputs, power units (in megawatts)	24,896	24,896
Congestion Revenue Rights \| Market Simulation Model \| Power Prices \| Minimum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Expected prices (in dollars per unit)	-9.86	-9.86
Congestion Revenue Rights \| Market Simulation Model \| Power Prices \| Maximum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Expected prices (in dollars per unit)	108.56	108.56
Congestion Revenue Rights \| Market Simulation Model \| Gas Prices \| Minimum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Expected prices (in dollars per unit)	3.5	3.5
Congestion Revenue Rights \| Market Simulation Model \| Gas Prices \| Maximum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Expected prices (in dollars per unit)	7.1	7.1
Tolling \| Option Model	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Fair Value, Assets	4,000,000	5,000,000
Fair Value, Liabilities	1,111,000,000	1,175,000,000
Tolling \| Option Model \| Power Prices \| Minimum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Expected prices (in dollars per unit)	37.5	38
Expected volatility rate (as a percent)	26.00%	25.00%
Tolling \| Option Model \| Power Prices \| Maximum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Expected prices (in dollars per unit)	70.8	63.9
Expected volatility rate (as a percent)	61.00%	45.00%
Tolling \| Option Model \| Power Prices \| Weighted Average	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Expected prices (in dollars per unit)	50.1	47.4
Expected volatility rate (as a percent)	32.00%	30.00%
Tolling \| Option Model \| Gas Prices \| Minimum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Expected volatility rate (as a percent)	13.00%	16.00%
Tolling \| Option Model \| Gas Prices \| Maximum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Expected volatility rate (as a percent)	31.00%	35.00%
Tolling \| Option Model \| Gas Prices \| Weighted Average	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Expected volatility rate (as a percent)	18.00%	21.00%

Fair_Value_Measurements_Fair_V1

Fair Value Measurements (Fair Value of Long-Term Debt Recorded at Carrying Value) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fair Value of Long-Term Debt Recorded at Carrying Value	'	'
Carrying Value	$10,426	$10,426
Fair Value	11,442	11,084
Southern California Edison	'	'
Fair Value of Long-Term Debt Recorded at Carrying Value	'	'
Carrying Value	10,023	10,022
Fair Value	$11,012	$10,656

Debt_and_Credit_Agreements_Det

Debt and Credit Agreements (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Jan. 31, 2014	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014
			Southern California Edison	Southern California Edison	Southern California Edison	Edison International Parent and Other	Edison International Parent and Other	Commercial paper	Commercial paper	Letters of credit
					First and refunding mortgage bonds	Revolving credit facility	Revolving credit facility	Southern California Edison	Southern California Edison	Southern California Edison
								Revolving credit facility	Revolving credit facility	Revolving credit facility
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'	'	'
Issuance of debt	'	'	'	'	$300,000,000	'	'	'	'	'
Outstanding borrowings	'	'	'	'	'	'	'	105,000,000	175,000,000	'
Weighted average interest rate (as a percent)	'	'	'	'	'	0.51%	0.55%	0.20%	0.24%	'
Commitment	'	'	'	'	'	1,250,000,000	'	2,750,000,000	'	'
Outstanding letters of credit	'	'	'	'	'	'	'	'	'	141,000,000
Letters of credit expiration period	'	'	'	'	'	'	'	'	'	'12 months
Short-term debt	$611,000,000	$209,000,000	$405,000,000	$175,000,000	'	$206,000,000	$34,000,000	'	'	'

Derivative_Instruments_Balance

Derivative Instruments (Balance Sheet Disclosures) (Details) (USD $)	Mar. 31, 2014		Dec. 31, 2013
In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Fair Value of Derivative Instruments	'		'
Short-Term, Derivative Assets	$112		$122
Long-Term, Derivative Assets	240		251
Short-Term, Derivative Liabilities	143		152
Long-Term, Derivative Liabilities	985		1,042
Southern California Edison	'		'
Fair Value of Derivative Instruments	'		'
Short-Term, Derivative Assets	112		122
Long-Term, Derivative Assets	240		251
Short-Term, Derivative Liabilities	143		152
Long-Term, Derivative Liabilities	985		1,042
Southern California Edison \| Commodity Contracts \| Electric Utility	'		'
Fair Value of Derivative Instruments	'		'
Short-Term, Derivative Assets	112		122
Long-Term, Derivative Assets	240		251
Derivative Assets, Total	352		373
Short-Term, Derivative Liabilities	143		152
Long-Term, Derivative Liabilities	985		1,042
Derivative Liabilities, Total	1,128		1,194
Net Liability	776		821
Southern California Edison \| Commodity Contracts \| Electric Utility \| Economic hedges	'		'
Fair Value of Derivative Instruments	'		'
Short-Term, Derivative Assets	135		141
Long-Term, Derivative Assets	240		251
Derivative Assets, Total	375		392
Short-Term, Derivative Liabilities	170		178
Long-Term, Derivative Liabilities	987		1,045
Derivative Liabilities, Total	1,157		1,223
Net Liability	782		831
Southern California Edison \| Commodity Contracts \| Electric Utility \| Netting and Collateral	'		'
Fair Value of Derivative Instruments	'		'
Short-Term, Derivative Assets	-23		-19
Long-Term, Derivative Assets	0		0
Derivative Assets, Total	-23		-19
Short-Term, Derivative Liabilities	-23		-19
Long-Term, Derivative Liabilities	0		0
Derivative Liabilities, Total	-23		-19
Net Liability	0		0
Southern California Edison \| Commodity Contracts \| Electric Utility \| Cash Collateral Posted	'		'
Fair Value of Derivative Instruments	'		'
Short-Term, Derivative Assets	0	[1]	0	[1]
Long-Term, Derivative Assets	0	[1]	0	[1]
Derivative Assets, Total	0	[1]	0	[1]
Short-Term, Derivative Liabilities	-4	[1]	-7	[1]
Long-Term, Derivative Liabilities	-2	[1]	-3	[1]
Derivative Liabilities, Total	-6	[1]	-10	[1]
Net Liability	($6)	[1]	($10)	[1]

[1]	In addition, at MarchB 31, 2014 and DecemberB 31, 2013, SCE had posted $7 million and $19 million, respectively, of collateral that is not offset against derivative liabilities and is reflected in "Other current assets" on the consolidated balance sheets.

Derivative_Instruments_Notiona

Derivative Instruments (Notional Values) (Details) (Southern California Edison, Electric Utility, Economic hedges)	Mar. 31, 2014	Dec. 31, 2013
	GWh	GWh
Electricity options, swaps and forwards (GWh)	'	'
Derivatives	'	'
Notional volumes of derivative instruments	5,086	6,274
Natural gas options, swaps and forwards (Bcf)	'	'
Derivatives	'	'
Notional volumes of derivative instruments	8	12
Congestion revenue rights (GWh)	'	'
Derivatives	'	'
Notional volumes of derivative instruments	135,714	149,234
Tolling arrangements (GWh)	'	'
Derivatives	'	'
Notional volumes of derivative instruments	86,248	87,991

Derivative_Instruments_Additio

Derivative Instruments (Additional Disclosures) (Details) (Southern California Edison, USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Electric Utility \| Economic hedges	'	'	'
Derivatives	'	'	'
Realized losses	($37)	($16)	'
Unrealized gains (losses)	52	-54	'
Aggregate fair value of all derivative liabilities with credit-risk-related contingent features	53	'	49
Additional collateral, aggregate fair value	10	'	'
Collateral already posted	0	'	0
Other current assets \| Commodity Contracts	'	'	'
Derivatives	'	'	'
Collateral already posted	$7	'	$19

Income_Taxes_Tax_Rate_Reconcil

Income Taxes (Tax Rate Reconciliation) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Effective Tax Rate	'	'
Income from continuing operations before income taxes	$205	$384
Provision for income tax at federal statutory rate of 35%	71	134
State tax, net of federal benefit	1	3
Property-related	-51	-41
Change related to uncertain tax positions	7	7
San Onofre settlement	-40	0
Other	-7	-5
Total income tax expense (benefit) from continuing operations	-19	98
Federal statutory rate (as a percent)	35.00%	35.00%
Effective tax rate	-9.30%	25.50%
Southern California Edison	'	'
Effective Tax Rate	'	'
Income from continuing operations before income taxes	222	395
Provision for income tax at federal statutory rate of 35%	78	138
State tax, net of federal benefit	1	14
Property-related	-51	-42
Change related to uncertain tax positions	7	7
San Onofre settlement	-40	0
Other	-7	-5
Total income tax expense (benefit) from continuing operations	($12)	$112
Federal statutory rate (as a percent)	35.00%	35.00%
Effective tax rate	-5.40%	28.40%

Income_Taxes_Textual_Details

Income Taxes (Textual) (Details) (Southern California Edison, USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014
Income Tax Disclosure [Line Items]	'
Reduction to revenue from repair deductions, before tax	$231
Tax Years 2003 to 2006 \| Proposed Adjustment to Taxable Gain \| IRS Examination	'
Income Tax Disclosure [Line Items]	'
Estimated potential future federal tax payment as of the balance sheet date, including interest and penalties, based on a proposed adjustment	208
Tax Years 2003 to 2006 \| Disallowance of Repair Allowance Deduction \| IRS Examination	'
Income Tax Disclosure [Line Items]	'
Estimated potential future federal tax payment as of the balance sheet date, including interest and penalties, based on a proposed adjustment	101
Tax Years 2007 to 2009 \| Disallowance of Repair Allowance Deduction \| IRS Examination	'
Income Tax Disclosure [Line Items]	'
Estimated potential future federal tax payment as of the balance sheet date, including interest and penalties, based on a proposed adjustment	$75

Compensation_and_Benefit_Plans2

Compensation and Benefit Plans (Expense Components) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Postretirement Benefits Other Than Pensions	'		'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'		'
Service cost	$11		$14
Interest cost	27		26
Expected return on plan assets	-28		-30
Amortization of prior service cost	-9		-9
Amortization of net loss	0		7
Total expense recognized	1		8
Pension Plans	'		'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'		'
Service cost	30		38
Interest cost	45		42
Expected return on plan assets	-57		-57
Amortization of prior service cost	1		1
Amortization of net loss	1	[1]	15	[1]
Expense under accounting standards	20		39
Regulatory adjustment	31		17
Total expense recognized	51		56
Net loss reclassified	2		3
Southern California Edison \| Postretirement Benefits Other Than Pensions	'		'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'		'
Service cost	11		13
Interest cost	27		26
Expected return on plan assets	-28		-30
Amortization of prior service cost	-9		-9
Amortization of net loss	0		7
Total expense recognized	1		7
Southern California Edison \| Pension Plans	'		'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'		'
Service cost	29		37
Interest cost	44		41
Expected return on plan assets	-56		-57
Amortization of prior service cost	1		1
Amortization of net loss	0	[1]	14	[1]
Expense under accounting standards	18		36
Regulatory adjustment	31		17
Total expense recognized	49		53
Net loss reclassified	$1		$2

[1]	Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International and SCE was $2 million and $1 million for the three months ended MarchB 31, 2014, respectively, and $3 million and $2 million for the three months ended MarchB 31, 2013, respectively.

Compensation_and_Benefit_Plans3

Compensation and Benefit Plans (Workforce Reduction) (Details) (Southern California Edison, Employee severance, USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014
Southern California Edison \| Employee severance	'
Restructuring Cost and Reserve [Line Items]	'
Beginning balance	$54
Additions	0
Payments	-10
Ending balance	$44

Compensation_and_Benefit_Plans4

Compensation and Benefit Plans (Textual) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014
Pension Plans	'
Pension and Other Postretirement Benefits	'
Employer contributions	$6
Estimated future contributions in remainder of 2014	202
Postretirement Benefits Other Than Pensions	'
Pension and Other Postretirement Benefits	'
Employer contributions	4
Estimated future contributions in remainder of 2014	11
Southern California Edison \| Pension Plans	'
Pension and Other Postretirement Benefits	'
Estimated future contributions in remainder of 2014	185
Employee severance \| Southern California Edison	'
Pension and Other Postretirement Benefits	'
Estimated cash severance payments	$213

San_Onofre_Issues_Details

San Onofre Issues (Details) (USD $)

3 Months Ended

0 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

3 Months Ended

In Millions, unless otherwise specified

Mar. 31, 2014

Mar. 31, 2013

Mar. 31, 2014

Mar. 31, 2013

Jun. 06, 2013

Mar. 31, 2014

Jun. 30, 2013

Dec. 31, 2013

31-May-13

Dec. 31, 2012

Feb. 01, 2012

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

31-May-13

Mar. 31, 2014

Southern California Edison

San Onofre (nuclear)

Replacement Steam Generators

Property, plant and equipment

Refunds of excess revenue

2012 Period

2013-2014 Periods

Disallowance Of SGRP Investment [Member]

Refund of SGRP Revenue Previously Recognized [Member]

Refund Of Flow Through Tax Benefits [Member]

Regulatory Assets [Line Items]

Settlement Agreement Subject Termination Period

'6 months

Decommissioning Nuclear Facilities Net Investment

$597

Incremental Inspection and Repair Costs

Period For Rate Recovery

'10 years

Authorized expenditures by authoritative body, market costs incurred

680

Authorized Return on Preferred Equity Percentage

50.00%

Public Utilities, Approved Return on Equity, Percentage

2.95%

2.62%

Amount of assets reclassified to a regulatory asset

1,521

Impairment and other charges

231

575

Impairment and other charges net of tax

365

Cumulative Impact of Settlement

806

542

159

Cumulative Impact of Settlement, Net of Tax

461

Net regulatory asset

$1,370

$1,300

$1,560

$371

$266

Other_Investments_Amortized_Co

Other Investments (Amortized Cost and Fair Value of Nuclear Decommissioning Trusts) (Details) (Southern California Edison, USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Nuclear Decommissioning Trusts Disclosures	'	'
Total Investments, Amortized Cost	$2,800	$2,770
Total Investments, Fair Value	4,587	4,494
Stocks	'	'
Nuclear Decommissioning Trusts Disclosures	'	'
Longest Maturity Dates (in years)	'0	'
Total Investments, Amortized Cost	668	656
Total Investments, Fair Value	2,234	2,208
Municipal bonds	'	'
Nuclear Decommissioning Trusts Disclosures	'	'
Longest Maturity Dates (in years)	'2051	'
Total Investments, Amortized Cost	725	675
Total Investments, Fair Value	838	756
U.S. government and agency securities	'	'
Nuclear Decommissioning Trusts Disclosures	'	'
Longest Maturity Dates (in years)	'2044	'
Total Investments, Amortized Cost	812	902
Total Investments, Fair Value	864	947
Corporate bonds	'	'
Nuclear Decommissioning Trusts Disclosures	'	'
Longest Maturity Dates (in years)	'2054	'
Total Investments, Amortized Cost	253	208
Total Investments, Fair Value	296	241
Short-term investments and receivables/payables	'	'
Nuclear Decommissioning Trusts Disclosures	'	'
Longest Maturity Dates (in years)	'One-year	'
Total Investments, Amortized Cost	342	329
Total Investments, Fair Value	$355	$342

Other_Investments_Summary_of_C

Other Investments (Summary of Changes in Fair Value of the Nuclear Decommissioning Trusts) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Southern California Edison	Southern California Edison
Summary Of Changes In The Fair Value [Roll Forward]	'	'	'	'
Balance at beginning of period	$4,587	$4,494	$4,494	$4,048
Gross realized gains	'	'	10	5
Gross realized losses	'	'	0	-1
Unrealized gains, net	'	'	62	176
Other-than-temporary impairments	'	'	-3	-8
Interest, dividends, contributions and other	'	'	24	26
Balance at end of period	$4,587	$4,494	$4,587	$4,246

Other_Investments_Textual_Deta

Other Investments (Textual) (Details) (USD $)	3 Months Ended
Other Investments (Textual) (Details) (USD $)	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Other Investments [Line Items]	'	'	'
Proceeds from sale of securities	$1,502,000,000	$435,000,000	'
Southern California Edison	'	'	'
Other Investments [Line Items]	'	'	'
Contributions received for decommissioning trusts	23,000,000	'	'
Proceeds from sale of securities	1,502,000,000	435,000,000	'
Unrealized holding gains, net of losses	$1,790,000,000	'	$1,720,000,000

Regulatory_Assets_and_Liabilit2

Regulatory Assets and Liabilities (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Regulatory Assets	'	'
Regulatory Assets, Current	$931	$538
Regulatory Asset, Long-term	7,351	7,241
Regulatory Liabilities	'	'
Regulatory Liabilities, Current	455	767
Regulatory Liabilities, Long-term	5,655	4,995
Southern California Edison	'	'
Regulatory Assets	'	'
Regulatory Assets, Current	931	538
Regulatory Asset, Long-term	7,351	7,241
Total Regulatory Assets	8,282	7,779
Regulatory Liabilities	'	'
Regulatory Liabilities, Current	455	767
Regulatory Liabilities, Long-term	5,655	4,995
Total Regulatory Liabilities	6,110	5,762
Southern California Edison \| Regulatory balancing accounts	'	'
Regulatory Assets	'	'
Regulatory Assets, Current	883	484
Regulatory Asset, Long-term	819	818
Southern California Edison \| Energy derivatives	'	'
Regulatory Assets	'	'
Regulatory Assets, Current	48	54
Regulatory Asset, Long-term	768	816
Southern California Edison \| Deferred income taxes, net	'	'
Regulatory Assets	'	'
Regulatory Asset, Long-term	3,116	2,957
Southern California Edison \| Other	'	'
Regulatory Assets	'	'
Regulatory Asset, Long-term	339	368
Regulatory Liabilities	'	'
Regulatory Liabilities, Current	38	43
Regulatory Liabilities, Long-term	14	12
Southern California Edison \| Pensions and other postretirement benefits	'	'
Regulatory Assets	'	'
Regulatory Asset, Long-term	377	369
Southern California Edison \| Unamortized investments, net	'	'
Regulatory Assets	'	'
Regulatory Asset, Long-term	312	332
Southern California Edison \| San Onofre (nuclear)	'	'
Regulatory Assets	'	'
Regulatory Asset, Long-term	1,371	1,325
Southern California Edison \| Unamortized loss on reacquired debt	'	'
Regulatory Assets	'	'
Regulatory Asset, Long-term	216	222
Southern California Edison \| Nuclear-related investment, net	'	'
Regulatory Assets	'	'
Regulatory Asset, Long-term	33	34
Southern California Edison \| Regulatory balancing accounts	'	'
Regulatory Liabilities	'	'
Regulatory Liabilities, Current	417	724
Regulatory Liabilities, Long-term	1,347	1,132
Southern California Edison \| Costs of Removal	'	'
Regulatory Liabilities	'	'
Regulatory Liabilities, Long-term	2,811	2,780
Southern California Edison \| Asset Retirement Obligations	'	'
Regulatory Liabilities	'	'
Regulatory Liabilities, Long-term	$1,112	$1,071

Regulatory_Assets_and_Liabilit3

Regulatory Assets and Liabilities (Regulatory Balancing Accounts) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Regulatory balancing accounts \| Energy resource recovery account	'	'
Regulatory Assets and Liabilities	'	'
Net liability	$1,478	$1,005
Regulatory balancing accounts \| Four Corners memorandum account	'	'
Regulatory Assets and Liabilities	'	'
Net liability	4	145
Regulatory balancing accounts \| New system generation balancing account	'	'
Regulatory Assets and Liabilities	'	'
Net liability	99	132
Refunds of excess revenue \| Significant Components	'	'
Regulatory Assets and Liabilities	'	'
Net liability	-62	-554
Refunds of excess revenue \| Public purpose programs and energy efficiency programs	'	'
Regulatory Assets and Liabilities	'	'
Net liability	-959	-1,037
Refunds of excess revenue \| Base rate recovery balancing account	'	'
Regulatory Assets and Liabilities	'	'
Net liability	-29	-247
Refunds of excess revenue \| Greenhouse gas auction revenue	'	'
Regulatory Assets and Liabilities	'	'
Net liability	-470	-385
Refunds of excess revenue \| FERC balancing accounts	'	'
Regulatory Assets and Liabilities	'	'
Net liability	-13	-59
Refunds of excess revenue \| Other	'	'
Regulatory Assets and Liabilities	'	'
Net liability	($172)	($108)

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)

1 Months Ended

3 Months Ended

1 Months Ended

3 Months Ended

1 Months Ended

Jun. 30, 2010

Sep. 01, 2013

Dec. 31, 2011

Jun. 30, 2010

Mar. 31, 2014

Mar. 31, 2013

Sep. 01, 2013

Feb. 28, 2014

Oct. 31, 2011

Mar. 31, 2014

Jun. 30, 2010

Southern California Edison

San Gabriel Windstorm Investigation

Alleged violations of PSD requirements and New Source Performance Standards of the CAA

Nuclear Insurance

San Onofre (nuclear)

San Onofre and Palo Verde

Amount Returned To Customers [Member]

Amount Returned To Shareholders [Member]

sites

Southern California Edison

SCE and other owners of San Onofre and Palo Verde

Southern California Edison

Nuclear Insurance

Southern California Edison

plaintiffs

SCE and other owners of San Onofre and Palo Verde

Schedule Of Commitments And Contingencies [Line Items]

Loss Contingency, Estimate of Possible Loss

$24,500,000

Loss Contingency, Number of Plaintiffs

Identified material sites for environmental remediation (in number of sites)

Minimum costs to be Identified Site

1,000,000

Minimum liability for environmental remediation for material sites

112,000,000

73,000,000

Immaterial sites for environmental remediation (in number of sites)

Immaterial sites, range of liability, minimum

4,000,000

Environmental remediation liability

116,000,000

Regulatory assets related to environmental remediation

112,000,000

Portion of recorded liability recoverable from incentive mechanism

37,000,000

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

74,000,000

Environmental remediation costs to be recovered (as a percent)

100.00%

Amount that cleanup costs could exceed recorded liability for identified material sites

161,000,000

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

Expected annual environmental remediation costs, low end of range

6,000,000

Expected annual environmental remediation costs, high end of range

32,000,000

Environmental remediation costs

1,000,000

2,000,000

Federal limit on public liability claims from nuclear incident, approximate

13,600,000,000

Private primary insurance purchased

375,000,000

Maximum assessment per each nuclear incident

255,000,000

Maximum yearly assessment per nuclear incident

38,000,000

Loss limit, property damage insurance

500,000,000

Loss limit, property damage insurance, federal minimum requirement

1,060,000,000

Limit on assessment of retrospective premium adjustments, per year, approximate

52,000,000

Insurance coverage for wildfire liabilities Limit

500,000,000

450,000,000

Self insurance retention per wildfire occurrence

10,000,000

Wildfire Threshold For Additional Coverage

550,000,000

Amount of damages, decision by US Court of Federal Claims, spent nuclear fuel litigation

142,000,000

112,000,000

94,000,000

18,000,000

Damages sought

$98,000,000

Preferred_and_Preference_Stock1

Preferred and Preference Stock of Utility (Details) (SCE Trust III, Southern California Edison, Series H Preferred Stock, USD $)	3 Months Ended
	Mar. 31, 2014
SCE Trust III \| Southern California Edison \| Series H Preferred Stock	'
Preferred and Preference Stock of Utility	'
Shares issued (in shares)	110,004
Preference stock dividend rate (percent)	5.75%
Liquidation value (in dollars per share)	$2,500

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Increase (Decrease) in Accumulated Other Comprehensive Loss	'		'
Balance at the beginning of period	($13)		'
Other comprehensive income (loss)	2		0
Balance at the end of period	-11		'
Southern California Edison	'		'
Increase (Decrease) in Accumulated Other Comprehensive Loss	'		'
Balance at the beginning of period	-11		'
Other comprehensive income (loss)	1		-3
Balance at the end of period	-10		'
Accumulated Defined Benefit Plans Adjustment	'		'
Increase (Decrease) in Accumulated Other Comprehensive Loss	'		'
Balance at the beginning of period	-13		-87
Other comprehensive loss before reclassifications	0		-2
Reclassified from accumulated other comprehensive income	2	[1]	2	[1]
Other comprehensive income (loss)	2		0
Balance at the end of period	-11		-87
Accumulated Defined Benefit Plans Adjustment \| Southern California Edison	'		'
Increase (Decrease) in Accumulated Other Comprehensive Loss	'		'
Balance at the beginning of period	-11		-29
Other comprehensive loss before reclassifications	0		-4
Reclassified from accumulated other comprehensive income	1	[1]	1	[1]
Other comprehensive income (loss)	1		-3
Balance at the end of period	($10)		($32)

[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_2

Interest and Other Income and Expenses (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Other income:	'	'
Total consolidated interest and other income	$23	$34
Other expenses:	'	'
Total consolidated other expenses	8	11
Southern California Edison	'	'
Other income:	'	'
Equity allowance for funds used during construction	13	21
Increase in cash surrender value of life insurance policies	7	7
Interest income	2	2
Other	1	2
Total interest and other income	23	32
Total consolidated interest and other income	23	32
Other expenses:	'	'
Civic, political and related activities and donations	5	5
Other	2	5
Total other expenses	7	10
Total consolidated other expenses	7	10
Edison International	'	'
Other income:	'	'
Other income	0	2
Other expenses:	'	'
Other expenses	$1	$1

Discontinued_Operations_Detail

Discontinued Operations (Details) (Edison Mission Energy, USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Feb. 18, 2014
	installments	Feb. 18, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'
Liabilities For Joint Tax and Qualified Retirement Plans Resulting from Deconsolidation	$350	'
Percentage of Tax Benefits To Be Paid	50.00%	'
Tax Attributes Estimated Amount	1,191	'
Estimated Period for Updating Procedure	'6 months	'
Cash Portion of Settlement Payment	225	'
Number of Installments	2	'
Interest Rate On Installments	5.00%	'
Tax Attribute Including Interest, Installment One	199	'
Tax Attribute Including Interest Installment Two	210	'
Amount Required for Escrow	'	50
Estimated Amount That Tax Benefits Will Exceed Liabilities	200	'
Deferred Tax Assets, Net of Valuation Allowance	198	'
Provision for losses	150	'
Cumulative impact of deconsolidation on earnings	48	'
Subsequent Event [Member]	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'
Estimated Income From Settlement Expected to Be Recorded	$152	'

Supplemental_Cash_Flows_Inform2

Supplemental Cash Flows Information (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Cash payments (receipts) for interest and taxes:	'	'
Interest, net of amounts capitalized	$157	$167
Tax payments (refunds), net	0	6
Southern California Edison	'	'
Cash payments (receipts) for interest and taxes:	'	'
Interest, net of amounts capitalized	149	159
Tax payments (refunds), net	3	-3
Dividends declared but not paid:	'	'
Accrued capital expenditures	438	507
Common Stock	'	'
Dividends declared but not paid:	'	'
Dividends declared but not paid	116	110
Common Stock \| Southern California Edison	'	'
Dividends declared but not paid:	'	'
Dividends declared but not paid	126	0
Preferred Stock and Preference Stock	'	'
Dividends declared but not paid:	'	'
Dividends declared but not paid	4	7
Preferred Stock and Preference Stock \| Southern California Edison	'	'
Dividends declared but not paid:	'	'
Dividends declared but not paid	$4	$7