Edison International (EIX) 10-Q 28 Oct 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 24, 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	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
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	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	434,888,104

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Operating revenue	$4,356	$3,960	$10,298	$9,638
Fuel	77	95	219	249
Purchased power	2,105	1,713	4,344	3,569
Operation and maintenance	879	971	2,480	2,809
Depreciation, decommissioning and amortization	424	392	1,248	1,224
Impairment and other charges	-3	0	228	575
Total operating expenses	3,482	3,171	8,519	8,426
Operating income	874	789	1,779	1,212
Interest and other income	40	28	109	91
Interest expense	-141	-137	-422	-402
Other expenses	-29	-15	-52	-38
Income from continuing operations before income taxes	744	665	1,414	863
Income tax expense	220	177	284	173
Income from continuing operations	524	488	1,130	690
Income (loss) from discontinued operations, net of tax	-16	-25	146	-1
Net income	508	463	1,276	689
Preferred and preference stock dividend requirements of utility	28	25	84	75
Net income attributable to common shareholders	480	438	1,192	614
Amounts attributable to common shareholders:	'	'	'	'
Income from continuing operations, net of tax	496	463	1,046	615
Income (loss) from discontinued operations, net of tax	-16	-25	146	-1
Net income attributable to common shareholders	480	438	1,192	614
Basic earnings (loss) per common share attributable to Edison International common shareholders:	'	'	'	'
Weighted-average shares of common stock outstanding (in shares)	326	326	326	326
Continuing operations (in dollars per share)	$1.52	$1.42	$3.21	$1.88
Discontinued operations (in dollars per share)	($0.05)	($0.08)	$0.45	$0
Total (in dollars per share)	$1.47	$1.34	$3.66	$1.88
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	328	329	329
Continuing operations (in dollars per share)	$1.51	$1.41	$3.18	$1.87
Discontinued operations (in dollars per share)	($0.05)	($0.07)	$0.44	$0
Total (in dollars per share)	$1.46	$1.34	$3.62	$1.87
Dividends declared per common share (in dollars per share)	$0.36	$0.34	$1.06	$1.01
Southern California Edison	'	'	'	'
Operating revenue	4,338	3,957	10,276	9,631
Fuel	77	95	219	249
Purchased power	2,105	1,713	4,344	3,569
Operation and maintenance	776	875	2,187	2,540
Depreciation, decommissioning and amortization	423	392	1,248	1,223
Property and other taxes	76	78	232	229
Impairment and other charges	0	0	231	575
Total operating expenses	3,457	3,153	8,461	8,385
Operating income	881	804	1,815	1,246
Interest and other income	36	27	105	89
Interest expense	-133	-131	-402	-384
Other expenses	-29	-15	-52	-38
Income from continuing operations before income taxes	755	685	1,466	913
Income tax expense	224	183	310	196
Income from continuing operations	'	'	1,156	717
Net income	531	502	1,156	717
Preferred and preference stock dividend requirements of utility	28	25	84	75
Net income attributable to common shareholders	503	477	1,072	642
Amounts attributable to common shareholders:	'	'	'	'
Net income attributable to common shareholders	$503	$477	$1,072	$642

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net income	$508	$463	$1,276	$689
Pension and postretirement benefits other than pensions:	'	'	'	'
Net gain (loss) arising during the period plus amortization included in net income	-9	3	-11	8
Other	-1	0	1	0
Other comprehensive income (loss), net of tax	-10	3	-10	8
Comprehensive income	498	466	1,266	697
Less: Comprehensive income attributable to noncontrolling interests	28	25	84	75
Comprehensive income attributable to Edison International	470	441	1,182	622
Southern California Edison	'	'	'	'
Net income	531	502	1,156	717
Pension and postretirement benefits other than pensions:	'	'	'	'
Net gain (loss) arising during the period plus amortization included in net income	1	2	2	1
Other	-1	0	1	0
Other comprehensive income (loss), net of tax	0	2	3	1
Comprehensive income	$531	$504	$1,159	$718

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Assets [Abstract]	'	'
Cash and cash equivalents	$142	$146
Receivables, less allowances of $70 and $66 for uncollectible accounts at respective dates	1,218	838
Accrued unbilled revenue	998	596
Inventory	275	256
Derivative assets	103	122
Regulatory assets	1,170	538
Deferred income taxes	125	421
Other current assets	467	395
Total current assets	4,498	3,312
Nuclear decommissioning trusts	4,741	4,494
Other investments	204	207
Total investments	4,945	4,701
Utility property, plant and equipment, less accumulated depreciation and amortization of $7,997 and $7,493 at respective dates	31,919	30,379
Nonutility property, plant and equipment, less accumulated depreciation of $74 at both dates (Edison International) and $73 and $70 at respective dates (Southern California Edison)	102	76
Total property, plant and equipment	32,021	30,455
Derivative assets	245	251
Regulatory assets	7,329	7,241
Other long-term assets	437	686
Total long-term assets	8,011	8,178
Total assets	49,475	46,646
LIABILITIES AND EQUITY	'	'
Short-term debt	1,349	209
Current portion of long-term debt	704	601
Accounts payable	1,455	1,407
Accrued taxes	191	358
Customer deposits	214	201
Derivative liabilities	154	152
Regulatory liabilities	794	767
Other current liabilities	988	1,186
Total current liabilities	5,849	4,881
Long-term debt	10,133	9,825
Deferred income taxes and credits	6,762	7,346
Derivative liabilities	947	1,042
Pensions and benefits	1,454	1,378
Asset retirement obligations	2,960	3,418
Regulatory liabilities	6,387	4,995
Other deferred credits and other long-term liabilities	2,225	2,070
Total deferred credits and other liabilities	20,735	20,249
Total liabilities	36,717	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)	2,445	2,403
Accumulated other comprehensive loss	-23	-13
Retained earnings	8,314	7,548
Total Edison International's common shareholders' equity	10,736	9,938
Preferred and preference stock of utility	2,022	1,753
Total noncontrolling interests	2,022	1,753
Total equity	12,758	11,691
Total liabilities and equity	49,475	46,646
Southern California Edison	'	'
Assets [Abstract]	'	'
Cash and cash equivalents	49	54
Receivables, less allowances of $70 and $66 for uncollectible accounts at respective dates	1,190	813
Accrued unbilled revenue	998	596
Inventory	265	256
Derivative assets	103	122
Regulatory assets	1,170	538
Deferred income taxes	0	303
Other current assets	489	393
Total current assets	4,264	3,075
Nuclear decommissioning trusts	4,741	4,494
Other investments	149	140
Total investments	4,890	4,634
Utility property, plant and equipment, less accumulated depreciation and amortization of $7,997 and $7,493 at respective dates	31,919	30,379
Nonutility property, plant and equipment, less accumulated depreciation of $74 at both dates (Edison International) and $73 and $70 at respective dates (Southern California Edison)	69	72
Total property, plant and equipment	31,988	30,451
Derivative assets	245	251
Regulatory assets	7,329	7,241
Other long-term assets	387	398
Total long-term assets	7,961	7,890
Total assets	49,103	46,050
LIABILITIES AND EQUITY	'	'
Short-term debt	679	175
Current portion of long-term debt	500	600
Accounts payable	1,446	1,373
Customer deposits	214	201
Derivative liabilities	154	152
Regulatory liabilities	794	767
Deferred income taxes	126	39
Other current liabilities	1,117	1,091
Total current liabilities	5,030	4,398
Long-term debt	9,523	9,422
Deferred income taxes and credits	8,182	7,841
Derivative liabilities	947	1,042
Pensions and benefits	1,015	951
Asset retirement obligations	2,960	3,418
Regulatory liabilities	6,387	4,995
Other deferred credits and other long-term liabilities	1,984	1,845
Total deferred credits and other liabilities	21,475	20,092
Total liabilities	36,028	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	608	592
Accumulated other comprehensive loss	-8	-11
Retained earnings	8,237	7,594
Total Edison International's common shareholders' equity	11,005	10,343
Preferred and preference stock of utility	2,070	1,795
Total equity	13,075	12,138
Total liabilities and equity	$49,103	$46,050

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified
Receivables, allowances for uncollectible accounts (in dollars)	$70	$66
Utility property, plant and equipment, accumulated depreciation (in dollars)	7,997	7,493
Nonutility property, plant and equipment, accumulated depreciation (in dollars)	74	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)	70	66
Utility property, plant and equipment, accumulated depreciation (in dollars)	7,997	7,493
Nonutility property, plant and equipment, accumulated depreciation (in dollars)	$73	$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 $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:	'	'
Net income	$1,276	$689
Less: Income (loss) from discontinued operations	146	-1
Income from continuing operations	1,130	690
Adjustments to reconcile to net cash provided by operating activities:	'	'
Depreciation, decommissioning and amortization	1,248	1,224
Regulatory impacts of net nuclear decommissioning trust earnings	100	82
Impairment and other charges	228	575
Deferred income taxes and investment tax credits	303	257
Other	70	70
EME settlement payments	-225	0
Changes in operating assets and liabilities:	'	'
Receivables	-369	-406
Inventory	-19	68
Accounts payable	211	155
Other current assets and liabilities	-497	-458
Derivative assets and liabilities, net	-68	207
Regulatory assets and liabilities, net	41	94
Other noncurrent assets and liabilities	-126	-488
Net cash provided by operating activities	2,027	2,070
Cash flows from financing activities:	'	'
Long-term debt issued, net of premium, discount, and issuance costs of $5 and $6 at respective dates (Edison International) and $2 and $6 at respective dates (Southern California Edison)	395	394
Long-term debt matured or repurchased	-405	-201
Bonds remarketed, net	0	195
Preference stock issued, net	269	387
Preference stock redeemed	0	-400
Short-term debt financing, net	1,138	1,352
Settlements of stock-based compensation, net	-57	-40
Dividends to noncontrolling interests	-88	-82
Dividends paid	-347	-330
Net cash provided by financing activities	905	1,275
Cash flows from investing activities:	'	'
Capital expenditures	-2,856	-2,761
Proceeds from sale of nuclear decommissioning trust investments	5,846	4,574
Purchases of nuclear decommissioning trust investments and other	-5,951	-4,674
Other	25	-44
Net cash used by investing activities	-2,936	-2,905
Net (decrease) increase in cash and cash equivalents	-4	440
Cash and cash equivalents at beginning of period	146	170
Cash and cash equivalents at end of period	142	610
Southern California Edison	'	'
Cash flows from operating activities:	'	'
Net income	1,156	717
Income from continuing operations	1,156	717
Adjustments to reconcile to net cash provided by operating activities:	'	'
Depreciation, decommissioning and amortization	1,248	1,223
Regulatory impacts of net nuclear decommissioning trust earnings	100	82
Impairment and other charges	231	575
Deferred income taxes and investment tax credits	324	197
Other	61	66
Changes in operating assets and liabilities:	'	'
Receivables	-377	-371
Inventory	-9	68
Accounts payable	234	174
Other current assets and liabilities	-577	-382
Derivative assets and liabilities, net	-68	207
Regulatory assets and liabilities, net	41	94
Other noncurrent assets and liabilities	149	-487
Net cash provided by operating activities	2,513	2,163
Cash flows from financing activities:	'	'
Long-term debt issued, net of premium, discount, and issuance costs of $5 and $6 at respective dates (Edison International) and $2 and $6 at respective dates (Southern California Edison)	398	394
Long-term debt matured or repurchased	-405	-201
Bonds remarketed, net	0	195
Preference stock issued, net	269	387
Preference stock redeemed	'	-400
Short-term debt financing, net	502	1,178
Settlements of stock-based compensation, net	-34	-36
Dividends paid	-340	-321
Net cash provided by financing activities	390	1,196
Cash flows from investing activities:	'	'
Capital expenditures	-2,827	-2,761
Proceeds from sale of nuclear decommissioning trust investments	5,846	4,574
Purchases of nuclear decommissioning trust investments and other	-5,951	-4,674
Other	24	-21
Net cash used by investing activities	-2,908	-2,882
Net (decrease) increase in cash and cash equivalents	-5	477
Cash and cash equivalents at beginning of period	54	45
Cash and cash equivalents at end of period	$49	$522

Consolidated_Statements_of_Cas1

Consolidated Statements of Cash Flows (Parenthetical) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Premiums Discounts and Issuance Costs of Long Term Debt	$5	$6
Southern California Edison	'	'
Premiums Discounts and Issuance Costs of Long Term Debt	$2	$6

Summary_of_Significant_Account

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 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- and nine-month periods ended September 30, 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.
	Revision to Consolidated Statements of Cash Flow
	The consolidated statements of cash flows of Edison International and Southern California Edison Company were revised to correct an error in the amount of purchases of nuclear decommissioning trust investments and the amount of regulatory impacts of net nuclear decommissioning trust earnings. The revisions had no impact on the consolidated balance sheet, statements of income, comprehensive income, changes in equity or on the net change in cash and cash equivalents. Management believes the revisions do not have a material impact on the prior period financial statements. The following table presents the cash flow statement effects related to the revision for the nine months ended September 30, 2013 and the year ended December 31, 2013:
		Edison International									Southern California Edison
	(in millions)	As Reported			Adjustment			As Revised			As Reported			Adjustment			As Revised
	Nine months ended September 30, 2013
	Cash flows from operating activities:
	Adjustments to reconcile to net cash provided by operating activities:
	Regulatory impacts of net nuclear decommissioning trust earnings	$	265		$	(183	)	$	82		$	265		$	(183	)	$	82
	Total cash provided by operating activities	2,253			(183		)	2,070			2,346			(183		)	2,163
	Cash flows from investing activities:
	Purchases of nuclear decommissioning trust investments	(4,857		)	183			(4,674		)	(4,857		)	183			(4,674		)
	Total cash used by investing activities	(3,088		)	183			(2,905		)	(3,065		)	183			(2,882		)
		Edison International									Southern California Edison
	(in millions)	As Reported			Adjustment			As Revised			As Reported			Adjustment			As Revised
	Year ended December 31, 2013
	Cash flows from operating activities:
	Adjustments to reconcile to net cash provided by operating activities:
	Regulatory impacts of net nuclear decommissioning trust earnings	$	312		$	(236	)	$	76		$	312		$	(236	)	$	76
	Total cash provided by operating activities	3,203			(236		)	2,967			3,284			(236		)	3,048
	Cash flows from investing activities:
	Purchases of nuclear decommissioning trust investments	(5,951		)	236			(5,715		)	(5,951		)	236			(5,715		)
	Total cash used by investing activities	(3,808		)	236			(3,572		)	(3,783		)	236			(3,547		)
	For the three months ended March 31, 2014 and the six months ended June 30, 2014, the correction also increases net cash provided by operating activities by $67 million and $5 million, respectively, and increases cash flows used by investing activities by the same amount. There were also errors identified which had an inconsequential impact on the three months ended March 31, 2013 and the six months ended June 30, 2013 as well as the annual periods of 2012 and 2011. Since these errors are inconsequential, management has concluded revision of these periods is not necessary.
	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)		September 30,			December 31, 2013			September 30,			December 31, 2013
			2014						2014
	Money market funds		$	40		$	68		$	8		$	8
	Cash is temporarily invested until required for check clearing. Checks issued, but not yet paid by the financial institution, are reclassified from cash to accounts payable at the end of each reporting period as follows:
			Edison International						SCE
	(in millions)		September 30,			December 31, 2013			September 30,			December 31, 2013
			2014						2014
	Book balances reclassified to accounts payable		$	191		$	168		$	190		$	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						Nine months ended
			September 30,						September 30,
	(in millions, except per-share amounts)		2014			2013			2014			2013
	Basic earnings per share – continuing operations:
	Income from continuing operations available to common shareholders		$	496		$	463		$	1,046		$	615
	Weighted average common shares outstanding		326			326			326			326
	Basic earnings per share – continuing operations		$	1.52		$	1.42		$	3.21		$	1.88
	Diluted earnings per share – continuing operations:
	Income from continuing operations available to common shareholders		$	496		$	463		$	1,046		$	615
	Income impact of assumed conversions		—			—			1			1
	Income from continuing operations available to common shareholders and assumed conversions		$	496		$	463		$	1,047		$	616
	Weighted average common shares outstanding		326			326			326			326
	Incremental shares from assumed conversions		3			2			3			3
	Adjusted weighted average shares – diluted		329			328			329			329
	Diluted earnings per share – continuing operations		$	1.51		$	1.41		$	3.18		$	1.87
	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 38,800 and 4,109,363 shares of common stock for the three months ended September 30, 2014 and 2013, and 62,885 and 4,109,363 shares for the nine months ended September 30, 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.
	Asset Retirement Obligation
	The following table summarizes the changes in SCE's ARO liability for the nine month period ended September 30, 2014 and the twelve month period ended December 31, 2013, including San Onofre and Palo Verde:
	(in millions)	September 30,			December 31,
2014			2013
Beginning balance	$	3,418		$	2,782
Accretion1	150			182
Revisions	(604		)	455
Liabilities settled	(4		)	(1		)
Ending balance	$	2,960		$	3,418
1	An ARO represents the present value of a future obligation. Accretion is an increase in the liability to account for the time value of money resulting from discounting.
During the second quarter of 2014, SCE updated its decommissioning cost estimate based on a site specific assessment. The decommissioning cost estimate in 2014 dollars is $4.4 billion (SCE share – $3.3 billion) and includes costs from June 7, 2013 through the respective completion dates to decommission San Onofre Units 2 and 3. The decommissioning cost estimate is subject to a number of estimates including the cost of burial of nuclear waste, cost of removal of property, site remediation costs as well as a number of other assumptions and estimates, including when the federal government may remove spent fuel canisters from the San Onofre site, as to which there can be no assurance. The cost estimate is subject to change and such changes may be material. SCE's share of the present value of decommissioning costs after escalation and using current discounts rates was $3.0 billion at September 30, 2014.
The total ARO liability related to San Onofre Units 2 and 3 at September 30, 2014 was $2.2 billion compared to $2.7 billion at December 31, 2013. The ARO liability is lower than the present value of the decommissioning costs set forth above due to different discount rates and expected time period of expenditures. The ARO liability at September 30, 2014 was based on a discount rate of 6.30% established when the ARO liability was originally recorded in 2003. The ARO liability for San Onofre Units 2 and 3 is based on expenditures beginning in 2015 through the respective completion dates. Expenditures from June 7, 2013 through September 30, 2014 are currently recorded as operation and maintenance costs and are treated as recoverable through GRC revenues, with the 2014 recorded costs being subject to customary prudency review (See Note 9). SCE has filed a request with the CPUC to authorize early release of Nuclear Decommissioning Trust funds to recover SCE's share of costs from June 7, 2013 through the end of 2014. As discussed in Note 9, to the extent that costs are recovered from SCE's Nuclear Decommissioning Trust as decommissioning costs, SCE intends to refund such amounts to customers as provided in the San Onofre OII Amended Settlement Agreement (as defined in Note 9).
The change in estimate of the ARO liability related to San Onofre Units 2 and 3 ($604 million) was based on the updated decommissioning cost estimate for the retirement of those Units. The work plan developed for the revised estimate accelerated decommissioning activities beginning in 2013 from the prior assumption of 2022. In addition, certain activities that were previously forecasted to be completed at the end of the decommissioning period were accelerated over the next ten years. Although the changes in the decommissioning cost estimate for these activities in current dollars did not change significantly, the changes in timing, as well as revised escalation rates, reduced the present value of future decommissioning costs (using the 6.30% discount rate).
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
On May 28, 2014, the FASB issued an accounting standards update on revenue recognition including enhanced disclosures. Under the new standard, revenue is recognized when (or as) a good or service is transferred to the customer and the customer obtains control of the good or service. Edison International and SCE are currently evaluating this new guidance which is effective January 1, 2017 and cannot determine the impact of this standard at this time.

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Equity	9 Months Ended
	Sep. 30, 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 nine months ended September 30, 2014:
		Equity Attributable to Edison International											Noncontrolling Interests
	(in millions, except per-share amounts)	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	—		—			1,192			1,192			84			1,276
	Other comprehensive loss	—		(10		)	—			(10		)	—			(10		)
	Common stock dividends declared ($1.065 per share)	—		—			(347		)	(347		)	—			(347		)
	Dividends, distributions to noncontrolling interests	—		—			—			—			(84		)	(84		)
	Stock-based compensation	22		—			(79		)	(57		)	—			(57		)
	Noncash stock-based compensation	20		—			—			20			—			20
	Issuance of preference stock	—		—			—			—			269			269
	Balance at September 30, 2014	$	2,445	$	(23	)	$	8,314		$	10,736		$	2,022		$	12,758
	The following table provides Edison International's changes in equity for the nine months ended September 30, 2013:
		Equity Attributable to Edison International											Noncontrolling Interests
	(in millions, except per-share amounts)	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	—		—			614			614			75			689
	Other comprehensive income	—		8			—			8			—			8
	Common stock dividends declared ($1.0125 per share)	—		—			(330		)	(330		)	—			(330		)
	Dividends, distributions to noncontrolling interests	—		—			—			—			(75		)	(75		)
	Stock-based compensation	5		—			(45		)	(40		)	—			(40		)
	Noncash stock-based compensation	19		—			(6		)	13			(1		)	12
	Issuance of preference stock	—		—			—			—			387			387
	Redemption of preference stock	—		—			(8		)	(8		)	(392		)	(400		)
	Balance at September 30, 2013	$	2,397	$	(79	)	$	7,371		$	9,689		$	1,753		$	11,442
	The following table provides SCE's changes in equity for the nine months ended September 30, 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	—		—			—			1,156			—			1,156
	Other comprehensive income	—		—			3			—			—			3
	Dividends declared on common stock	—		—			—			(378		)	—			(378		)
	Dividends on preferred and preference stock	—		—			—			(84		)	—			(84		)
	Stock-based compensation	—		13			—			(47		)	—			(34		)
	Noncash stock-based compensation	—		9			—			(4		)	—			5
	Issuance of preference stock	—		(6		)	—			—			275			269
	Balance at September 30, 2014	$	2,168	$	608		$	(8	)	$	8,237		$	2,070		$	13,075
	The following table provides SCE's changes in equity for the nine months ended September 30, 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	—		—			—			717			—			717
	Other comprehensive income	—		—			1			—			—			1
	Dividends declared on common stock	—		—			—			(360		)	—			(360		)
	Dividends on preferred and preference stock	—		—			—			(75		)	—			(75		)
	Stock-based compensation	—		3			—			(39		)	—			(36		)
	Noncash stock-based compensation	—		10			—			4			—			14
	Issuance of preference stock	—		(13		)	—			—			400			387
	Redemption of preference stock	—		8			—			(8		)	(400		)	(400		)
	Balance at September 30, 2013	$	2,168	$	589		$	(28	)	$	7,467		$	1,795		$	11,991

Variable_Interest_Entities

Variable Interest Entities	9 Months Ended
	Sep. 30, 2014
Variable Interest Entities Disclosure [Abstract]	'
Variable Interest Entities	'
	Variable Interest Entities
	A VIE is defined as a legal entity that meets one of two conditions: (1) the equity owners do not have sufficient equity at risk, or (2) the holders of the equity investment at risk, as a group, lack any of the following three characteristics: decision-making rights, the obligation to absorb losses, or the right to receive the expected residual returns of the entity. The primary beneficiary is identified as the variable interest holder that has both the power to direct the activities of the VIE that most significantly impact the entity's economic performance and the obligation to absorb losses or the right to receive benefits from the entity that could potentially be significant to the VIE. The primary beneficiary is required to consolidate the VIE. 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 from these VIE projects was 5,341 MW and 5,290 MW at September 30, 2014 and 2013, respectively, and the amounts that SCE paid to these projects were $319 million and $330 million for the three months ended September 30, 2014 and 2013, respectively, and $526 million and $527 million for the nine months ended September 30, 2014 and 2013, respectively. These amounts are recoverable in customer rates, subject to reasonableness review. As of September 30, 2014, SCE has additional VIE contracts with future aggregate contracted capacity of 251 MW to commence deliveries in 2016.
	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 respective 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 trust 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 September 30, 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 September 30, 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 following table provides a summary of the trusts' income statements:
			Three months ended						Nine months ended
			September 30,						September 30,
	(in millions)		Trust I		Trust II		Trust III		Trust I		Trust II		Trust III
	2014
	Dividend income		$	7	$	5	$	4	$	20	$	15	$	9
	Dividend distributions		7		5		4		20		15		9
	2013
	Dividend income		$	7	$	5	*		$	20	$	14	*
	Dividend distributions		7		5		*		20		14		*
	*	Not applicable

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 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 September 30, 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's and SCE's Level 1 assets and liabilities is determined using unadjusted quoted prices in active markets that are available at the measurement date for identical assets and liabilities. This level includes exchange-traded equity securities, U.S. treasury securities, mutual funds and money market funds.
	Level 2 – SCE's Level 2 assets and liabilities include long-term debt and 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:
		September 30, 2014
	(in millions)	Level 1				Level 2				Level 3				Netting				Total
														and
														Collateral1
	Assets at fair value
	Derivative contracts	$	—			$	5			$	343			$	—			$	348
	Other	35				—				—				—				35
	Nuclear decommissioning trusts:
	Stocks2	1,970				—				—				—				1,970
	Fixed Income3	744				1,336				—				—				2,080
	Short-term investments, primarily cash equivalents	665				21				—				—				686
	Subtotal of nuclear decommissioning trusts4	3,379				1,357				—				—				4,736
	Total assets	3,414				1,362				343				—				5,119
	Liabilities at fair value
	Derivative contracts	—				6				1,101				(6		)		1,101
	Total liabilities	—				6				1,101				(6		)		1,101
	Net assets (liabilities)	$	3,414			$	1,356			$	(758	)		$	6			$	4,018
		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 69% and 70% of SCE's equity investments were located in the United States at September 30, 2014 and December 31, 2013, respectively.
	3	At September 30, 2014 and December 31, 2013, SCE's corporate bonds were diversified and included collateralized mortgage obligations and other asset backed securities of $58 million and $47 million, respectively.
	4	Excludes net receivables of $5 million and net receivables of $12 million at September 30, 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
	Edison International Parent and Other assets measured at fair value consisted of money market funds of $40 million and $68 million at September 30, 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								Nine months ended
			September 30,								September 30,
	(in millions)		2014				2013				2014				2013
	Fair value of net liabilities at beginning of period		$	(878	)		$	(967	)		$	(805	)		$	(791	)
	Total realized/unrealized gains (losses):
	Included in regulatory assets and liabilities1		120				(50		)		43				(205		)
	Purchases		7				19				22				56
	Settlements		(7		)		(33		)		(18		)		(91		)
	Fair value of net liabilities at end of period		$	(758	)		$	(1,031	)		$	(758	)		$	(1,031	)
	Change during the period in unrealized gains and losses related to assets and liabilities held at the end of the period		$	71			$	(65	)		$	(12	)		$	(198	)
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
September 30, 2014	$	339			$	—		Market simulation model	Load forecast	7,630 MW - 25,431 MW
									Power prices1	$1.65 - $109.95
									Gas prices2	$3.65 - $6.53
31-Dec-13	366				—			Market simulation model	Load forecast	7,603 MW - 24,896 MW
									Power prices1	$(9.86) - $108.56
									Gas prices2	$3.50 - $7.10
Tolling
September 30, 2014	—				1,095			Option model	Volatility of gas prices	12% - 40% (19%)
									Volatility of power prices	26% - 45% (31%)
									Power prices	$36.80 - $65.60 ($48.90)
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)
1	Prices are in dollars per megawattt-hour.
2	Prices are in dollars per million British thermal units.
Level 3 Fair Value Sensitivity
Congestion Revenue Rights
For CRRs, where SCE is the buyer, generally increases (decreases) in forecasted load in isolation would result in increases (decreases) to the fair value. In general, an increase (decrease) in electricity and gas prices at illiquid locations tends to result in increases (decreases) to fair value; however, changes in electricity and gas prices in opposite directions may have varying results on fair value.
Tolling Arrangements
The fair values of SCE's tolling arrangements contain intrinsic value and time value. Intrinsic value is the difference between the market price and strike price of the underlying commodity. Time value is made up of several components, including volatility, time to expiration, and interest rates. The option model for tolling arrangements reflects plant specific information such as operating and start-up costs.
For tolling arrangements where SCE is the buyer, increases in volatility of the underlying commodity prices would result in increases to fair value as it represents greater price movement risk. As power and gas prices increase, the fair value of tolling arrangements tends to increase. The valuation of tolling arrangements is also impacted by the correlation between gas and power prices. As the correlation increases, the fair value of tolling arrangements tends to decline.
Nuclear Decommissioning Trusts
SCE's nuclear decommissioning trust investments include equity securities, U.S. treasury securities and other fixed income securities. Equity and treasury securities are classified as Level 1 as fair value is determined by observable market prices in active or highly liquid and transparent markets. The remaining fixed income securities are classified as Level 2. The fair value of these financial instruments is based on evaluated prices that reflect significant observable market information such as reported trades, actual trade information of similar securities, benchmark yields, broker/dealer quotes, issuer spreads, bids, offers and relevant credit information.
Fair Value of Debt Recorded at Carrying Value
The carrying value and fair value of Edison International's and SCE's long-term debt (including current portion of long-term debt) are as follows:
		September 30, 2014								December 31, 2013
(in millions)		Carrying				Fair				Carrying				Fair
		Value				Value				Value				Value
SCE		$	10,023			$	11,295			$	10,022			$	10,656
Edison International		10,837				12,134				10,426				11,084
The fair value of Edison International's and SCE's long-term debt (including current portion of long-term debt) is classified as Level 2 and is based on evaluated prices that reflect significant observable market information such as reported trades, actual trade information of similar securities, benchmark yields, broker/dealer quotes of new issue prices and relevant credit information.
The carrying value of Edison International's and SCE's trade receivables and payables, other investments, and short-term debt approximates fair value.

Debt_and_Credit_Agreements

Debt and Credit Agreements	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Debt and Credit Agreements	'
	Debt and Credit Agreements
	Credit Agreements and Short-Term Debt
	During the first quarter of 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.
	In July 2014, SCE and Edison International Parent extended the maturity dates of their respective $2.75 billion and $1.25 billion multi-year revolving credit facilities by one year to July 2019. The credit facility for SCE is generally used to support commercial paper and letters of credit issued for procurement-related collateral requirements, balancing account undercollections and for general corporate purposes, including working capital requirements to support operations and capital expenditures. Edison International Parent's credit facility is used for general corporate purposes.
	At September 30, 2014, SCE's outstanding commercial paper was $379 million at a weighted-average interest rate of 0.22%. At September 30, 2014, letters of credit issued under SCE's credit facility aggregated $226 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 September 30, 2014, Edison International Parent's outstanding commercial paper was $670 million at a weighted-average interest rate of 0.27%. At December 31, 2013, the outstanding commercial paper was $34 million at a weighted-average interest rate of 0.55%.
	Long-Term Debt
	During the second quarter of 2014, SCE issued $400 million of 1.125% first and refunding mortgage bonds due in May 2017. The proceeds from these bonds were used to repay commercial paper borrowings and to fund SCE's capital program.
	In connection with a settlement agreement between Edison International, EME and the Consenting Noteholders, in September 2014, Edison International Parent issued non-interest bearing promissory notes of $204 million due in September 2015 and $214 million due in September 2016. See Note 16 for further details.

Derivative_Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Instruments	'
	Derivative Instruments
	Derivative financial instruments are used to manage exposure to commodity price risk. These risks are managed in part by entering into forward commodity transactions, including options, swaps and futures. To mitigate credit risk from counterparties in the event of nonperformance, master netting agreements are used whenever possible and counterparties may be required to pledge collateral depending on the creditworthiness of each counterparty and the risk associated with the transaction.
	Commodity Price Risk
	Commodity price risk represents the potential impact that can be caused by a change in the market value of a particular commodity. SCE's electricity price exposure arises from energy purchased from and sold to wholesale markets as a result of differences between SCE's load requirements and the amount of energy delivered from its generating facilities and power purchase agreements. SCE's natural gas price exposure arises from natural gas purchased for the Mountainview power plant and peaker plants, QF contracts where pricing is based on a monthly natural gas index and power purchase agreements in which SCE has agreed to provide the natural gas needed for generation, referred to as tolling arrangements.
	Credit and Default Risk
	Credit and default risk represent the potential impact that can be caused if a counterparty were to default on its contractual obligations and SCE would be exposed to spot markets for buying replacement power or selling excess power. In addition, SCE would be exposed to the risk of non-payment of accounts receivable, primarily related to the sales of excess power and realized gains on derivative instruments.
	Certain power contracts contain master netting agreements or similar agreements, which generally allow counterparties subject to the agreement to setoff amounts when certain criteria are met, such as in the event of default. The objective of netting is to reduce credit exposure. Additionally, to reduce SCE's risk exposures counterparties may be required to pledge collateral depending on the 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 $38 million and $49 million as of September 30, 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 September 30, 2014, SCE would be required to post collateral in the amount of $26 million.
	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:
			September 30, 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		$	103		$	245		$	348		$	159		$	948		$	1,107		$	759
	Cash collateral posted1		—			—			—			(5		)	(1		)	(6		)	(6		)
	Net amounts presented in the consolidated balance sheets		$	103		$	245		$	348		$	154		$	947		$	1,101		$	753
			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 September 30, 2014 and December 31, 2013, SCE had posted $6 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						Nine months ended
			September 30,						September 30,
	(in millions)		2014			2013			2014			2013
	Realized losses		$	(18	)	$	(15	)	$	(59	)	$	(38	)
	Unrealized gains (losses)		138			(41		)	80			(159		)
	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		September 30,		December 31, 2013
					2014
	Electricity options, swaps and forwards		GWh		2,519		6,274
	Natural gas options, swaps and forwards		Bcf		7		12
	Congestion revenue rights		GWh		120,075		149,234
	Tolling arrangements		GWh		82,333		87,991

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 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:
		Three months ended						Nine months ended
		September 30,						September 30,
	(in millions)	2014			2013			2014			2013
	Edison International:
	Income from continuing operations before income taxes	$	744		$	665		$	1,414		$	863
	Provision for income tax at federal statutory rate of 35%	260			233			495			302
	Increase (decrease) in income tax from:
	State tax, net of federal benefit	28			22			34			5
	Property-related	(73		)	(57		)	(179		)	(121		)
	Change related to uncertain tax positions	10			(5		)	(4		)	13
	San Onofre OII settlement	—			—			(40		)	—
	Other	(5		)	(16		)	(22		)	(26		)
	Total income tax expense from continuing operations	$	220		$	177		$	284		$	173
	Effective tax rate	29.6		%	26.6		%	20.1		%	20		%
	SCE:
	Income from continuing operations before income taxes	$	755		$	685		$	1,466		$	913
	Provision for income tax at federal statutory rate of 35%	264			240			513			319
	Increase (decrease) in income tax from:
	State tax, net of federal benefit	31			21			42			12
	Property-related	(73		)	(57		)	(179		)	(121		)
	Change related to uncertain tax positions	9			(6		)	(1		)	11
	San Onofre OII settlement	—			—			(40		)	—
	Other	(7		)	(15		)	(25		)	(25		)
	Total income tax expense from continuing operations	$	224		$	183		$	310		$	196
	Effective tax rate	29.7		%	26.7		%	21.1		%	21.5		%
	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 OII settlement. The tax benefits were offset by estimated refunds to customers included as part of the pre-tax charge of $231 million. See Note 9 for further details.
	Tax Disputes
	Tax Years 2003 – 2006
	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 liability of approximately $212 million, including interest and penalties through September 30, 2014.
	•	A proposed adjustment to disallow a component of SCE's percentage repair allowance deduction, which if sustained, would result in a federal tax liability of approximately $102 million, including interest through September 30, 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. Although Edison International disagrees with the proposed adjustments, it has made a $189 million deposit during the second quarter of 2014 to stop the accrual of interest.
	Edison International has tentatively reached an agreement with the IRS regarding SCE's percentage repair allowance deduction, which if finalized, would result in a federal tax liability of approximately $14 million, including interest through September 30, 2014.
	It is reasonably possible that Edison International will complete the 2003 – 2006 federal income tax audit cycle during the next twelve months which would effectively settle open tax positions. Edison International estimates tax benefits of approximately $50 million, including interest, may be recognized in income depending on the final outcome of the IRS audit.
	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 percentage repair allowance deduction (similar to the 2003 – 2006 tax years). The proposed adjustment to disallow a component of SCE's percentage repair allowance deduction, if sustained, would result in a federal tax liability of approximately $76 million, including interest through September 30, 2014. Edison International has tentatively reached an agreement with the IRS regarding SCE’s percentage repair allowance deduction, which if finalized, would result in a federal tax liability of approximately $16 million, including interest through September 30, 2014.
	During the second quarter of 2014, SCE revised its liability for uncertain tax positions related to percentage repair allowance deduction for 2003-2010 which resulted in income tax benefits of $29 million.
	Tax Years 2010 – 2012
	A Revenue Agent Report from the IRS is expected to be received from the examination phase of tax years 2010 through 2012 within the next six months. After receipt of the Revenue Agent Report, SCE expects to update its assessment of uncertain tax positions.

Compensation_and_Benefit_Plans

Compensation and Benefit Plans	9 Months Ended
	Sep. 30, 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 $155 million during the nine months ended September 30, 2014, which includes contributions of $131 million by SCE. Edison International expects to make contributions of $7 million during the remainder of 2014, which includes $2 million from SCE. SCE's future contributions are expected to decline due to the passage of the Highway Transportation Funding Act of 2014 although such decreases may be offset by higher funding levels in future years. Annual contributions made by SCE to most of SCE's pension plans are anticipated to be recovered through CPUC-approved regulatory mechanisms. Annual contributions to these plans are expected to be, at a minimum, equal to the related annual expense.
	Pension expense components for continuing operations are:
		Three months ended							Nine months ended
		September 30,							September 30,
	(in millions)	2014				2013			2014			2013
	Edison International:
	Service cost	$	30			$	38		$	89		$	114
	Interest cost	48				42			141			126
	Expected return on plan assets	(61		)		(58		)	(178		)	(172		)
	Settlement costs1	35				24			35			73
	Amortization of prior service cost	1				1			4			3
	Amortization of net loss2	1				15			3			45
	Expense under accounting standards	$	54			$	62		$	94		$	189
	Regulatory adjustment (deferred)	(2		)		(7		)	59			(21		)
	Total expense recognized	$	52			$	55		$	153		$	168
	SCE:
	Service cost	$	29			$	37		$	87		$	111
	Interest cost	44				41			132			123
	Expected return on plan assets	(56		)		(57		)	(168		)	(171		)
	Settlement costs1	33				24			33			72
	Amortization of prior service cost	1				1			3			3
	Amortization of net loss2	—				14			1			42
	Expense under accounting standards	$	51			$	60		$	88		$	180
	Regulatory adjustment (deferred)	(2		)		(7		)	59			(21		)
	Total expense recognized	$	49			$	53		$	147		$	159
	1	Relates to lump-sum payments made to employees who retired from the SCE Retirement Plan (primarily due to workforce reductions described below). Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International was $2 million for the three and nine months ended September 30, 2014 and zero and $2 million for the three and nine months ended September 30, 2013, respectively.
	2	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, respectively, for the three months ended September 30, 2014, and $5 million and $3 million, respectively, for the nine months ended September 30, 2014. The amount reclassified for Edison International and SCE was $4 million and $3 million, respectively, for the three months ended September 30, 2013, and $11 million and $8 million, respectively, for the nine months ended September 30, 2013.
	Under generally accepted accounting principles (“GAAP”), a settlement is recorded when lump-sum payments exceed estimated annual service and interest costs. As of August 31, 2014, lump-sum payments to employees retiring in 2014 from the SCE Retirement Plan (primarily due to workforce reductions described below) exceeded the estimated service and interest costs for the year. A settlement requires re-measurement of both the plan pension obligations and plan assets as of the date of the settlement. The re-measurement of the SCE Retirement Plan as of August 31, 2014 resulted in total actuarial losses of $158 million, including $146 million for SCE. The actuarial losses are primarily due to a decrease in the discount rate (from 4.75% at December 31, 2013 to 4.00% as of August 31, 2014) due to lower interest rates, partially offset by performance of the plan assets.
	After re-measurement, GAAP requires an acceleration of a portion of unrecognized net losses attributable to such lump-sum payments as additional pension expense as reflected in the above table. The additional pension expense related to SCE did not impact net income as such amounts are probable of recovery through future rates.
	The projected benefit obligations exceeded the fair value of the SCE Retirement Plan assets by $559 million, including $518 million for SCE, at August 31, 2014 compared to $478 million, including $449 million for SCE, at December 31, 2013.
	Postretirement Benefits Other Than Pensions
	Edison International made contributions of $11 million during the nine months ended September 30, 2014 and expects to make contributions of $4 million during the remainder of 2014, substantially all of which are expected to be made by SCE. Annual contributions made to SCE plans are anticipated to be recovered through CPUC-approved regulatory mechanisms and are expected to be, at a minimum, equal to the total annual expense for these plans. 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:
		Three months ended							Nine months ended
		September 30,							September 30,
	(in millions)	2014				2013			2014			2013
	Edison International:
	Service cost	$	10			$	14		$	32		$	42
	Interest cost	28				26			82			78
	Expected return on plan assets	(28		)		(30		)	(84		)	(90		)
	Special termination benefits1	—				—			—			10
	Amortization of prior service credit	(9		)		(9		)	(27		)	(27		)
	Amortization of net loss	—				7			—			21
	Total expense	$	1			$	8		$	3		$	34
	SCE:
	Service cost	$	10			$	14		$	32		$	41
	Interest cost	27				26			81			78
	Expected return on plan assets	(28		)		(30		)	(84		)	(90		)
	Special termination benefits1	—				—			—			10
	Amortization of prior service credit	(9		)		(9		)	(27		)	(27		)
	Amortization of net loss	—				7			—			21
	Total expense	$	—			$	8		$	2		$	33
	1	Due to the reduction in workforce, SCE has incurred costs for extended retiree health care coverage.
	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. During the second quarter of 2014, SCE increased the estimated impact for workforce reductions related to transferring certain information technology activities to third parties. Through September 30, 2014, SCE's share of estimated cash severance for these efforts totaled $222 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		9
	Payments		(17		)
	Other		(1		)
	Balance at September 30, 2014		$	45
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

San Onofre Issues	9 Months Ended
	Sep. 30, 2014
Retirement Of Plant [Abstract]	'
San Onofre Issues	'
	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. 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.
	CPUC Proceedings and Proposed Settlement
	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 September 23, 2014, SCE entered into an Amended and Restated Settlement Agreement (the "San Onofre OII Amended Settlement Agreement") with The Utility Reform Network ("TURN"), the CPUC's Office of Ratepayer Advocates ("ORA"), SDG&E, the Coalition of California Utility Employees ("CUE"), and Friends of the Earth ("FOE") (together, the "Settling Parties"). If implemented, the San Onofre OII Amended 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 Settling Parties agreed to amend the Settlement Agreement that was originally entered into in March 2014 in response to an Assigned Commissioner's and Administrative Judges’ Ruling that was issued on September 5, 2014. The San Onofre OII Amended Settlement Agreement does not affect proceedings before the NRC or proceedings related to recoveries from third parties described below, but does describe how shareholders and customers will share any potential recoveries. Implementation of the San Onofre OII Amended Settlement Agreement is subject to the approval of the CPUC. The San Onofre OII Amended Settlement Agreement is subject to termination by any of the Settling Parties if the CPUC has not approved it by December 23, 2014. On October 9, 2014, the Administrative Law Judges in the OII issued a Proposed Decision approving the San Onofre OII Amended Settlement Agreement. Under applicable rules, the CPUC cannot render a final decision for at least thirty days following the date of the Proposed Decision, but there can be no certainty of when or what the CPUC will actually decide. The parties to the San Onofre OII Amended Settlement Agreement have agreed to exercise their best efforts to obtain CPUC approval.
	Disallowances, Refunds and Rate Recoveries
	If the San Onofre OII Amended 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 exceeded CPUC-authorized operations and maintenance expense. These costs, net of invoices paid by the supplier of the RSGs, were previously expensed in SCE's 2012 financial results, although they remain subject to recovery from the RSG's supplier. Neither will SCE be allowed to recover in rates provisionally authorized operations and maintenance expense in 2013 that exceeds amounts 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 San Onofre OII Amended 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.
	A 5% incentive is provided for SCE to realize savings for ratepayers by selling materials and supplies and nuclear fuel, as well as reducing its nuclear fuel investment by contract cancellations. This incentive allows SCE to retain 5% of sales proceeds and to recover 5% of the excess of cancelled contract obligations over cancellation costs. The balance of sale proceeds and cancellation benefits is credited to ratepayers.
	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 March 2014 San Onofre OII Settlement Agreement by the Settling Parties, SCE concluded that the outcome of the OII that is more likely than any other outcome is approval and implementation of that 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 OII 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 San Onofre OII 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.
	At September 30, 2014, the San Onofre Regulatory Asset was $1.39 billion and the San Onofre regulatory liability for refunds of revenue was approximately $677 million. Such amounts do not reflect any recoveries from third parties by SCE.
	Under the San Onofre OII Amended Settlement Agreement, the unamortized portion of SCE's investment other than nuclear fuel may, at SCE's option, be excluded from SCE's capital structure for purposes of determining regulatory capital requirements and to allow SCE to finance those assets solely with debt. Had such exclusion applied as of September 30, 2014, SCE estimates that its common equity requirement would be reduced by more than $300 million. The terms of San Onofre OII Amended Settlement Agreement provide that if SCE selects the debt financing option and finances these regulatory assets at a cost lower than the return authorized by the March 2014 San Onofre OII Settlement Agreement, the savings will be shared equally between ratepayers and SCE.
	As discussed above, the Proposed Decision approves the San Onofre OII Amended Settlement Agreement, which includes a requirement for SCE to make a contribution of $4 million per year, for a five-year period, to a University of California research, development and demonstration program to reduce greenhouse gases. If the CPUC approves the San Onofre Amended Settlement Agreement consistent with the Proposed Decision, SCE will accrue the contribution obligation and record a pre-tax charge.
	San Onofre OII Settlement Agreement Procedure
	On October 9, 2014, the Administrative Law Judges in the San Onofre OII issued a Proposed Decision approving the San Onofre OII Amended Settlement Agreement. Under its rules, the CPUC may not render a final decision for at least thirty days following the issuance of the Proposed Decision, but the rules do not otherwise provide for any fixed time period for the CPUC to act on the San Onofre OII Amended Settlement Agreement. 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 San Onofre OII Amended 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 San Onofre OII Amended 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 San Onofre OII Amended 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.
	Third-Party Recoveries
	San Onofre carries accidental property damage and carried accidental outage insurance issued by Nuclear Electric Insurance Limited ("NEIL") and has placed NEIL on notice of claims under both policies. The NEIL policies have a number of exclusions and limitations that NEIL may assert reduce or eliminate coverage, and SCE may choose to challenge NEIL's application of any such exclusions and limitations. The estimated total claims under the accidental outage insurance through June 28, 2014 are approximately $427 million (SCE's share of which is approximately $334 million.) Accidental outage policy benefits may be subject to reduction by up to 90% for the periods following announcement of the permanent retirement of the Units. The accidental outage insurance at San Onofre has been canceled prospectively as a result of the permanent retirement. SCE has not submitted a proof of loss under the accidental property damage insurance but reserves the right to do so. It is possible that the NEIL Board of Directors will make a coverage determination by the end of 2014, but it may take longer. SCE may challenge any reduction or denial of coverage. No amounts have been recognized in SCE's financial statements, pending NEIL's response. The San Onofre OII Amended Settlement Agreement allocates to ratepayers 95% of SCE recoveries from NEIL under the accidental outage insurance policy, and 82.5% of other SCE recoveries against NEIL, in each case net of costs of recovery.
	SCE is also pursuing claims against Mitsubishi Heavy Industries, Ltd. and related companies (together, "MHI"), which designed and supplied the RSGs. MHI warranted the RSGs for an initial period of 20 years from acceptance and is contractually obligated to repair or replace defective items with dispatch and to pay specified damages for certain repairs. MHI's liability under the purchase agreement is limited to $138 million and excludes consequential damages, defined to include "the cost of replacement power"; however, limitations in the contract are subject to applicable exceptions both in the contract and under law. SCE has advised MHI that it believes one or more of such exceptions apply and that MHI's liability is not limited to $138 million, and MHI has advised SCE that it disagrees. In October 2013, after a prescribed 90-day waiting period from the service of an earlier notice of dispute, SCE sent MHI a formal request for binding arbitration under the auspices of the International Chamber of Commerce in accordance with the purchase contract, seeking damages for all losses. In the request for arbitration, SCE alleges contract and tort claims and seeks at least $4 billion in damages on behalf of itself and its ratepayers and in its capacity as Operating Agent for San Onofre. MHI has denied any liability and has asserted counterclaims for $41 million, for which SCE has denied any liability. Each of the other co-owners sued MHI, alleging claims arising from MHI's supplying the faulty steam generators, which have been stayed pending the arbitration. The other co-owners (SDG&E and Riverside) have been added as additional claimants in the arbitration, with party status. The San Onofre OII Amended Settlement Agreement allocates recoveries from MHI net of recovery costs equally between SCE and its ratepayers as set forth in the agreement.
	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 identified a "white" finding (low to moderate safety significance) for failing to ensure that MHI's modeling and analysis were adequate. SCE stated disagreements with the NRC's Report but chose not to challenge the "white" finding. 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 conducted an investigation of the accuracy and completeness of information SCE provided to the Augmented Inspection Team, and concluded that allegations against SCE regarding the accuracy and completeness of such information were not substantiated. On October 2, 2014, the NRC's Office of Inspector General ("OIG") published a report on the NRC's oversight of SCE's evaluation process for the RSGs, which was used to determine whether changes in the design of a component would require an amendment to the operating license of a nuclear power plant. The OIG determined that the NRC "missed opportunities" in connection with its 2009 inspection of SCE's evaluation process, and concluded that without further review of information concerning SCE's evaluation conclusions, there is no assurance that the NRC reached the correct conclusion in its 2009 inspection that San Onofre did not need a license amended for its steam generator replacement. The OIG Report also indicated that additional ongoing review of SCE's license amendment compliance by an NRC Staff Petition Review Board had been further deferred to February 2015. 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 for 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 proceedings by the NRC will be completed or whether inquiries by other government agencies will be initiated.

Other_Investments

Other Investments	9 Months Ended
	Sep. 30, 2014
Regulated Entity, Other Assets, Noncurrent [Abstract]	'
Other Investments	'
	Other Investments
	Nuclear Decommissioning Trusts
	Future decommissioning costs related to SCE's nuclear assets are expected to be funded from independent decommissioning trusts, which received $6 million in 2014 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		September 30,			December 31,			September 30,			December 31, 2013
				2014			2013			2014
	Stocks	—		$	500		$	656		$	1,970		$	2,208
	Municipal bonds	2051		663			675			807			756
	U.S. government and agency securities	2045		826			902			888			947
	Corporate bonds	2057		333			208			385			241
	Short-term investments and receivables/payables	One-year		657			329			691			342
	Total			$	2,979		$	2,770		$	4,741		$	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 $2.1 billion and $2.6 billion for the three months ended September 30, 2014 and 2013, and $5.8 billion and $4.6 billion for the nine months ended September 30, 2014 and 2013, respectively. Unrealized holding gains, net of losses, were $1.8 billion and $1.7 billion at September 30, 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						Nine months ended
			September 30,						September 30,
	(in millions)		2014			2013			2014			2013
	Balance at beginning of period		$	4,740		$	4,182		$	4,494		$	4,048
	Gross realized gains		149			119			187			261
	Gross realized losses		—			(17		)	—			(18		)
	Unrealized gains (losses), net		(131		)	55			38			46
	Other-than-temporary impairments		(4		)	(15		)	(10		)	(44		)
	Interest, dividends, contributions and other		(13		)	8			32			39
	Balance at end of period		$	4,741		$	4,332		$	4,741		$	4,332
	Trust assets are used to pay income taxes as the Trust files separate income taxes returns from SCE. Deferred income taxes related to unrealized gains at September 30, 2014 were $431 million. Accordingly, the fair value of Trust assets available to pay future decommissioning costs, net of deferred income taxes, totaled $4.3 billion at September 30, 2014. Due to regulatory mechanisms, changes in assets of the trusts from income items have no impact on operating revenue or earnings.

Regulatory_Assets_and_Liabilit

Regulatory Assets and Liabilities	9 Months Ended
	Sep. 30, 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)	September 30,			December 31,
		2014			2013
	Current:
	Regulatory balancing accounts	$	1,101		$	484
	Energy derivatives	64			54
	Other	5			—
	Total current	1,170			538
	Long-term:
	Deferred income taxes, net	3,361			2,957
	Pensions and other postretirement benefits	506			369
	Energy derivatives	721			816
	Unamortized investments, net	275			332
	San Onofre	1,386			1,325
	Unamortized loss on reacquired debt	206			222
	Regulatory balancing accounts	545			818
	Other	329			402
	Total long-term	7,329			7,241
	Total regulatory assets	$	8,499		$	7,779
	Regulatory Liabilities
	SCE's regulatory liabilities included on the consolidated balance sheets are:
	(in millions)	September 30,			December 31,
		2014			2013
	Current:
	Regulatory balancing accounts	$	750		$	724
	Other	44			43
	Total current	794			767
	Long-term:
	Costs of removal	2,833			2,780
	Asset retirement obligations	1,769			1,071
	Regulatory balancing accounts	1,085			1,132
	San Onofre	677			—
	Other	23			12
	Total long-term	6,387			4,995
	Total regulatory liabilities	$	7,181		$	5,762
	Net Regulatory Balancing Accounts
	The following table summarizes the significant components of regulatory balancing accounts included in the above tables of regulatory assets and liabilities:
	(in millions)	September 30,			December 31,
		2014			2013
	Asset (liability)
	Energy resource recovery account	$	1,570		$	1,005
	Four Corners memorandum account	6			145
	New system generation balancing account	117			132
	Public purpose programs and energy efficiency programs	(832		)	(1,037		)
	Base rate recovery balancing account	(243		)	(247		)
	Greenhouse gas auction revenue	(300		)	(385		)
	FERC formula rates and FERC balancing accounts	(89		)	(59		)
	FERC energy settlements	(195		)	—
	Other	(223		)	(108		)
	Net liability	$	(189	)	$	(554	)

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 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 the
	San Onofre OII 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. This Agreement was subsequently amended and restated in September 2014. 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 in January 2013 that asserted, among other things, 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. 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 $24.5 million, including penalties totaling $15 million, which were approved by the CPUC without modification.
	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 September 30, 2014, SCE's recorded estimated minimum liability to remediate its 20 identified material sites (sites in which the upper end of the range of the costs is at least $1 million) was $110 million, including $72 million related to San Onofre. In addition to these sites, SCE also has 38 immaterial sites for which the total minimum recorded liability was $3 million. Of the $113 million total environmental remediation liability for SCE, $109 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 $72 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 $159 million and $7 million, respectively. The upper limit of this range of costs was estimated using assumptions least favorable to SCE among a range of reasonably possible outcomes.
	SCE expects to clean up and mitigate its identified sites over a period of up to 30 years. Remediation costs for each of the next four years are expected to range from $4.8 million to $31.1 million. Costs incurred for the nine months ended September 30, 2014 and 2013 were $3 million and $5 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 offsite liability claims for bodily injury and property damage from a nuclear incident to the amount of available financial protection, which is currently approximately $13.6 billion. SCE and other owners of San Onofre and Palo Verde have purchased the maximum private primary insurance available ($375 million) through a Facility Form issued by American Nuclear Insurers ("ANI"). 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.
	The ANI Facility Form coverage includes broad liability protection for bodily injury or offsite property damage caused by nuclear material at San Onofre, or while in transit to or from San Onofre. The Facility Form, however, includes several exclusions. First, it excludes onsite property damage to the nuclear facility itself and onsite cleanup costs, but as discussed below SCE maintains separate NEIL property damage coverage for such events. Second, tort claims of onsite workers are excluded, but SCE also maintains separate $375 million ANI Facility Workers Form coverage for non-licensee workers. Third, offsite environmental costs arising out of government orders or directives, including those issued under the Comprehensive Environmental Response, Compensation and Liability Act, also known as CERCLA, are excluded, with minor exceptions from clearly identifiable accidents.
	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 nuclear property damage and accidental outage insurance policies. The amount of nuclear property insurance purchased for San Onofre and Palo Verde exceeds the minimum federal requirement of approximately $1.06 billion. These policies include coverage for decontamination liability. 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 June 1, 2014, Edison International renewed its liability insurance coverage, which included coverage for SCE's wildfire liabilities up to a $547.5 million limit (with a self-insured retention of $10 million per wildfire occurrence). Various coverage limitations within the policies that make up this insurance coverage could result in additional self-insured costs in the event of multiple wildfire occurrences during the policy period (June 1, 2014 to May 31, 2015). SCE also has additional coverage for certain wildfire liabilities of $450 million, which applies when total covered wildfire claims exceed $550 million, through June 14, 2015. 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. In September 2014, SCE added damages incurred for the period from January 1, 2011 to December 31, 2013 in the approximate amount of $84 million to its December 2011 lawsuit. Additional legal action would be necessary to recover damages incurred after December 31, 2013. 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	9 Months Ended
	Sep. 30, 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 were used to repay commercial paper borrowings and for general corporate purposes.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2014
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]	'
Accumulated Other Comprehensive Loss	'
	Accumulated Other Comprehensive Loss
	Edison International's accumulated other comprehensive loss, net of tax consist of:
		Three months ended September 30,						Nine months ended September 30,
	(in millions)	2014			2013			2014			2013
	Beginning balance	$	(13	)	$	(82	)	$	(13	)	$	(87	)
	Pension and PBOP – net gain (loss):
	Other comprehensive loss before reclassifications	(12		)	—			(17		)	(2		)
	Reclassified from accumulated other comprehensive loss1	3			3			6			10
	Other	(1		)	—			1			—
	Change	(10		)	3			(10		)	8
	Ending Balance	$	(23	)	$	(79	)	$	(23	)	$	(79	)
	1	These items are included in the computation of net periodic pension and PBOP expense. See Note 8 for additional information.
	SCE's accumulated other comprehensive loss, net of tax consist of:
		Three months ended September 30,						Nine months ended September 30,
	(in millions)	2014			2013			2014			2013
	Beginning balance	$	(8	)	$	(30	)	$	(11	)	$	(29	)
	Pension and PBOP – net gain (loss):
	Other comprehensive loss before reclassifications	—			—			—			(4		)
	Reclassified from accumulated other comprehensive loss1	1			2			2			5
	Other	(1		)	—			1			—
	Change	—			2			3			1
	Ending Balance	$	(8	)	$	(28	)	$	(8	)	$	(28	)
	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 Other Expenses	9 Months Ended
	Sep. 30, 2014
Other Income and Expenses [Abstract]	'
Interest and Other Income and Other Expenses	'
	Interest and Other Income and Other Expenses
	Interest and other income and other expenses are as follows:
		Three months ended				Nine months ended
		September 30,				September 30,
	(in millions)	2014		2013		2014		2013
	SCE interest and other income:
	FERC energy settlements	$	1	$	—	$	15	$	—
	Equity allowance for funds used during construction	19		14		50		54
	Increase in cash surrender value of life insurance policies and life insurance benefits	10		10		28		24
	Interest income	1		2		6		8
	Other	5		1		6		3
	Total SCE interest and other income	36		27		105		89
	Edison International Parent and Other other income	4		1		4		2
	Total Edison International interest and other income	$	40	$	28	$	109	$	91
	SCE other expenses:
	Penalties	$	15	$	—	$	15	$	—
	Civic, political and related activities and donations	8		9		22		24
	Other	6		6		15		14
	Total SCE other expenses	29		15		52		38
	Edison International Parent and Other other expenses	—		—		—		—
	Total Edison International other expenses	$	29	$	15	$	52	$	38
	SCE has participated in proceedings seeking recovery of refunds from sellers of electricity and natural gas who manipulated the electric and natural gas markets during the energy crisis in California in 2000 – 2001. SCE is authorized to refund to customers any refunds actually realized by SCE, net of litigation costs and amounts retained by SCE as a shareholder incentive pursuant to an established sharing arrangement. During the nine months ended September 30, 2014, eight FERC-approved settlement agreements were finalized providing SCE with total refunds of $216 million of which $15 million is subject to the shareholder incentive.
	In August 2014, the CPUC approved two settlement agreements between SCE and the SED related to 2011 events in San Bernardino and San Gabriel, California. The settlement agreements resulted in SCE paying a $15 million penalty to the State General Fund. See Note 12 for further details.

Discontinued_Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 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 (the "EME Settlement Agreement") pursuant to which EME amended its Plan of Reorganization to incorporate the terms of the EME Settlement Agreement, including extinguishing all existing claims between EME and Edison International. The Amended Plan of Reorganization, including the EME Settlement Agreement, 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 EME 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 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 $342 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 (the indirect investment in Capistrano Wind project is accounted for at fair value) 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 were initially estimated to be approximately $1.191 billion, subject to an estimate updating procedure set forth in the EME Settlement Agreement. As called for in the EME Settlement Agreement, Edison International made an initial cash payment to the Reorganization Trust of $225 million in April 2014. In August 2014, Edison International entered into an amendment of the Settlement Agreement to finalize the remaining matters related to the EME Settlement including setting the EME Tax Attributes at $1.206 billion and the amount of the two installment payments, including interest, at $204 million due on September 30, 2015 and $214 million due on September 30, 2016.
	As a result of the EME Settlement Agreement, Edison International recorded, as part of discontinued operations, losses of $16 million and income of $168 million during the three and nine months ended September 30, 2014, respectively.
	Assuming continuation of existing tax 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 would 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.

Supplemental_Cash_Flows_Inform

Supplemental Cash Flows Information	9 Months Ended
	Sep. 30, 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
		Nine months ended September 30,
	(in millions)	2014		2013		2014		2013
	Cash payments for interest and taxes:
	Interest, net of amounts capitalized	$	412	$	431	$	411	$	415
	Tax payments, net	190		27		15		18
	Non-cash financing and investing activities:
	Dividends declared but not paid:
	Common stock	$	116	$	110	$	126	$	120
	Preferred and preference stock	4		4		4		4
	Notes issued under EME Settlement Agreement	410		—		—		—
	SCE's accrued capital expenditures at September 30, 2014 and 2013 were $505 million and $401 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)	9 Months Ended
	Sep. 30, 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- and nine-month periods ended September 30, 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
	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
	On May 28, 2014, the FASB issued an accounting standards update on revenue recognition including enhanced disclosures. Under the new standard, revenue is recognized when (or as) a good or service is transferred to the customer and the customer obtains control of the good or service. Edison International and SCE are currently evaluating this new guidance which is effective January 1, 2017 and cannot determine the impact of this standard at this time.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2014
Significant Accounting Policies [Line Items]	'
Revision to Consolidated Statement of Cash Flow	'
	The following table presents the cash flow statement effects related to the revision for the nine months ended September 30, 2013 and the year ended December 31, 2013:
		Edison International									Southern California Edison
	(in millions)	As Reported			Adjustment			As Revised			As Reported			Adjustment			As Revised
	Nine months ended September 30, 2013
	Cash flows from operating activities:
	Adjustments to reconcile to net cash provided by operating activities:
	Regulatory impacts of net nuclear decommissioning trust earnings	$	265		$	(183	)	$	82		$	265		$	(183	)	$	82
	Total cash provided by operating activities	2,253			(183		)	2,070			2,346			(183		)	2,163
	Cash flows from investing activities:
	Purchases of nuclear decommissioning trust investments	(4,857		)	183			(4,674		)	(4,857		)	183			(4,674		)
	Total cash used by investing activities	(3,088		)	183			(2,905		)	(3,065		)	183			(2,882		)
		Edison International									Southern California Edison
	(in millions)	As Reported			Adjustment			As Revised			As Reported			Adjustment			As Revised
	Year ended December 31, 2013
	Cash flows from operating activities:
	Adjustments to reconcile to net cash provided by operating activities:
	Regulatory impacts of net nuclear decommissioning trust earnings	$	312		$	(236	)	$	76		$	312		$	(236	)	$	76
	Total cash provided by operating activities	3,203			(236		)	2,967			3,284			(236		)	3,048
	Cash flows from investing activities:
	Purchases of nuclear decommissioning trust investments	(5,951		)	236			(5,715		)	(5,951		)	236			(5,715		)
	Total cash used by investing activities	(3,808		)	236			(3,572		)	(3,783		)	236			(3,547		)
Cash Equivalents	'
	The cash equivalents were as follows:
			Edison International						SCE
	(in millions)		September 30,			December 31, 2013			September 30,			December 31, 2013
			2014						2014
	Money market funds		$	40		$	68		$	8		$	8
			Edison International						SCE
	(in millions)		September 30,			December 31, 2013			September 30,			December 31, 2013
			2014						2014
	Book balances reclassified to accounts payable		$	191		$	168		$	190		$	163
EPS Attributable to Edison International Common Shareholders	'
	EPS attributable to Edison International common shareholders was computed as follows:
			Three months ended						Nine months ended
			September 30,						September 30,
	(in millions, except per-share amounts)		2014			2013			2014			2013
	Basic earnings per share – continuing operations:
	Income from continuing operations available to common shareholders		$	496		$	463		$	1,046		$	615
	Weighted average common shares outstanding		326			326			326			326
	Basic earnings per share – continuing operations		$	1.52		$	1.42		$	3.21		$	1.88
	Diluted earnings per share – continuing operations:
	Income from continuing operations available to common shareholders		$	496		$	463		$	1,046		$	615
	Income impact of assumed conversions		—			—			1			1
	Income from continuing operations available to common shareholders and assumed conversions		$	496		$	463		$	1,047		$	616
	Weighted average common shares outstanding		326			326			326			326
	Incremental shares from assumed conversions		3			2			3			3
	Adjusted weighted average shares – diluted		329			328			329			329
	Diluted earnings per share – continuing operations		$	1.51		$	1.41		$	3.18		$	1.87
Southern California Edison	'
Significant Accounting Policies [Line Items]	'
Changes in ARO Liability	'
	The following table summarizes the changes in SCE's ARO liability for the nine month period ended September 30, 2014 and the twelve month period ended December 31, 2013, including San Onofre and Palo Verde:
	(in millions)	September 30,			December 31,
		2014			2013
	Beginning balance	$	3,418		$	2,782
	Accretion1	150			182
	Revisions	(604		)	455
	Liabilities settled	(4		)	(1		)
	Ending balance	$	2,960		$	3,418
	1	An ARO represents the present value of a future obligation. Accretion is an increase in the liability to account for the time value of money resulting from discounting.

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Equity (Tables)	9 Months Ended
	Sep. 30, 2014
Schedule of Capitalization, Equity [Line Items]	'
Schedule of changes in equity	'
	The following table provides Edison International's changes in equity for the nine months ended September 30, 2014:
		Equity Attributable to Edison International											Noncontrolling Interests
	(in millions, except per-share amounts)	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	—		—			1,192			1,192			84			1,276
	Other comprehensive loss	—		(10		)	—			(10		)	—			(10		)
	Common stock dividends declared ($1.065 per share)	—		—			(347		)	(347		)	—			(347		)
	Dividends, distributions to noncontrolling interests	—		—			—			—			(84		)	(84		)
	Stock-based compensation	22		—			(79		)	(57		)	—			(57		)
	Noncash stock-based compensation	20		—			—			20			—			20
	Issuance of preference stock	—		—			—			—			269			269
	Balance at September 30, 2014	$	2,445	$	(23	)	$	8,314		$	10,736		$	2,022		$	12,758
	The following table provides Edison International's changes in equity for the nine months ended September 30, 2013:
		Equity Attributable to Edison International											Noncontrolling Interests
	(in millions, except per-share amounts)	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	—		—			614			614			75			689
	Other comprehensive income	—		8			—			8			—			8
	Common stock dividends declared ($1.0125 per share)	—		—			(330		)	(330		)	—			(330		)
	Dividends, distributions to noncontrolling interests	—		—			—			—			(75		)	(75		)
	Stock-based compensation	5		—			(45		)	(40		)	—			(40		)
	Noncash stock-based compensation	19		—			(6		)	13			(1		)	12
	Issuance of preference stock	—		—			—			—			387			387
	Redemption of preference stock	—		—			(8		)	(8		)	(392		)	(400		)
	Balance at September 30, 2013	$	2,397	$	(79	)	$	7,371		$	9,689		$	1,753		$	11,442
Southern California Edison	'
Schedule of Capitalization, Equity [Line Items]	'
Schedule of changes in equity	'
	The following table provides SCE's changes in equity for the nine months ended September 30, 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	—		—			—			1,156			—			1,156
	Other comprehensive income	—		—			3			—			—			3
	Dividends declared on common stock	—		—			—			(378		)	—			(378		)
	Dividends on preferred and preference stock	—		—			—			(84		)	—			(84		)
	Stock-based compensation	—		13			—			(47		)	—			(34		)
	Noncash stock-based compensation	—		9			—			(4		)	—			5
	Issuance of preference stock	—		(6		)	—			—			275			269
	Balance at September 30, 2014	$	2,168	$	608		$	(8	)	$	8,237		$	2,070		$	13,075
	The following table provides SCE's changes in equity for the nine months ended September 30, 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	—		—			—			717			—			717
	Other comprehensive income	—		—			1			—			—			1
	Dividends declared on common stock	—		—			—			(360		)	—			(360		)
	Dividends on preferred and preference stock	—		—			—			(75		)	—			(75		)
	Stock-based compensation	—		3			—			(39		)	—			(36		)
	Noncash stock-based compensation	—		10			—			4			—			14
	Issuance of preference stock	—		(13		)	—			—			400			387
	Redemption of preference stock	—		8			—			(8		)	(400		)	(400		)
	Balance at September 30, 2013	$	2,168	$	589		$	(28	)	$	7,467		$	1,795		$	11,991

Variable_Interest_Entities_Tru

Variable Interest Entities Trust income (Tables) (Southern California Edison)	9 Months Ended
	Sep. 30, 2014
Southern California Edison	'
Variable Interest Entity	'
Summary of Trusts' Income Statements	'
	The following table provides a summary of the trusts' income statements:
			Three months ended						Nine months ended
			September 30,						September 30,
	(in millions)		Trust I		Trust II		Trust III		Trust I		Trust II		Trust III
	2014
	Dividend income		$	7	$	5	$	4	$	20	$	15	$	9
	Dividend distributions		7		5		4		20		15		9
	2013
	Dividend income		$	7	$	5	*		$	20	$	14	*
	Dividend distributions		7		5		*		20		14		*
	*	Not applicable

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'
Carrying Amounts and Fair Values of Long-term Debt, Including Current Portion	'
	The carrying value and fair value of Edison International's and SCE's long-term debt (including current portion of long-term debt) are as follows:
			September 30, 2014								December 31, 2013
	(in millions)		Carrying				Fair				Carrying				Fair
			Value				Value				Value				Value
	SCE		$	10,023			$	11,295			$	10,022			$	10,656
	Edison International		10,837				12,134				10,426				11,084
Southern California Edison	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'
Fair Value by Level	'
	The following table sets forth assets and liabilities of SCE that were accounted for at fair value by level within the fair value hierarchy:
		September 30, 2014
	(in millions)	Level 1				Level 2				Level 3				Netting				Total
														and
														Collateral1
	Assets at fair value
	Derivative contracts	$	—			$	5			$	343			$	—			$	348
	Other	35				—				—				—				35
	Nuclear decommissioning trusts:
	Stocks2	1,970				—				—				—				1,970
	Fixed Income3	744				1,336				—				—				2,080
	Short-term investments, primarily cash equivalents	665				21				—				—				686
	Subtotal of nuclear decommissioning trusts4	3,379				1,357				—				—				4,736
	Total assets	3,414				1,362				343				—				5,119
	Liabilities at fair value
	Derivative contracts	—				6				1,101				(6		)		1,101
	Total liabilities	—				6				1,101				(6		)		1,101
	Net assets (liabilities)	$	3,414			$	1,356			$	(758	)		$	6			$	4,018
		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 69% and 70% of SCE's equity investments were located in the United States at September 30, 2014 and December 31, 2013, respectively.
	3	At September 30, 2014 and December 31, 2013, SCE's corporate bonds were diversified and included collateralized mortgage obligations and other asset backed securities of $58 million and $47 million, respectively.
	4	Excludes net receivables of $5 million and net receivables of $12 million at September 30, 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								Nine months ended
			September 30,								September 30,
	(in millions)		2014				2013				2014				2013
	Fair value of net liabilities at beginning of period		$	(878	)		$	(967	)		$	(805	)		$	(791	)
	Total realized/unrealized gains (losses):
	Included in regulatory assets and liabilities1		120				(50		)		43				(205		)
	Purchases		7				19				22				56
	Settlements		(7		)		(33		)		(18		)		(91		)
	Fair value of net liabilities at end of period		$	(758	)		$	(1,031	)		$	(758	)		$	(1,031	)
	Change during the period in unrealized gains and losses related to assets and liabilities held at the end of the period		$	71			$	(65	)		$	(12	)		$	(198	)
	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
	September 30, 2014	$	339			$	—		Market simulation model	Load forecast	7,630 MW - 25,431 MW
										Power prices1	$1.65 - $109.95
										Gas prices2	$3.65 - $6.53
	31-Dec-13	366				—			Market simulation model	Load forecast	7,603 MW - 24,896 MW
										Power prices1	$(9.86) - $108.56
										Gas prices2	$3.50 - $7.10
	Tolling
	September 30, 2014	—				1,095			Option model	Volatility of gas prices	12% - 40% (19%)
										Volatility of power prices	26% - 45% (31%)
										Power prices	$36.80 - $65.60 ($48.90)
	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)

Derivative_Instruments_Tables

Derivative Instruments (Tables) (Southern California Edison)	9 Months Ended
	Sep. 30, 2014
Southern California Edison	'
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:
			September 30, 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		$	103		$	245		$	348		$	159		$	948		$	1,107		$	759
	Cash collateral posted1		—			—			—			(5		)	(1		)	(6		)	(6		)
	Net amounts presented in the consolidated balance sheets		$	103		$	245		$	348		$	154		$	947		$	1,101		$	753
			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 September 30, 2014 and December 31, 2013, SCE had posted $6 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.
Summarization of Economic Hedging Activities	'
	The following table summarizes the components of SCE's economic hedging activity:
			Three months ended						Nine months ended
			September 30,						September 30,
	(in millions)		2014			2013			2014			2013
	Realized losses		$	(18	)	$	(15	)	$	(59	)	$	(38	)
	Unrealized gains (losses)		138			(41		)	80			(159		)
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		September 30,		December 31, 2013
					2014
	Electricity options, swaps and forwards		GWh		2,519		6,274
	Natural gas options, swaps and forwards		Bcf		7		12
	Congestion revenue rights		GWh		120,075		149,234
	Tolling arrangements		GWh		82,333		87,991

Income_Taxes_Tables

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 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:
		Three months ended						Nine months ended
		September 30,						September 30,
	(in millions)	2014			2013			2014			2013
	Edison International:
	Income from continuing operations before income taxes	$	744		$	665		$	1,414		$	863
	Provision for income tax at federal statutory rate of 35%	260			233			495			302
	Increase (decrease) in income tax from:
	State tax, net of federal benefit	28			22			34			5
	Property-related	(73		)	(57		)	(179		)	(121		)
	Change related to uncertain tax positions	10			(5		)	(4		)	13
	San Onofre OII settlement	—			—			(40		)	—
	Other	(5		)	(16		)	(22		)	(26		)
	Total income tax expense from continuing operations	$	220		$	177		$	284		$	173
	Effective tax rate	29.6		%	26.6		%	20.1		%	20		%
	SCE:
	Income from continuing operations before income taxes	$	755		$	685		$	1,466		$	913
	Provision for income tax at federal statutory rate of 35%	264			240			513			319
	Increase (decrease) in income tax from:
	State tax, net of federal benefit	31			21			42			12
	Property-related	(73		)	(57		)	(179		)	(121		)
	Change related to uncertain tax positions	9			(6		)	(1		)	11
	San Onofre OII settlement	—			—			(40		)	—
	Other	(7		)	(15		)	(25		)	(25		)
	Total income tax expense from continuing operations	$	224		$	183		$	310		$	196
	Effective tax rate	29.7		%	26.7		%	21.1		%	21.5		%

Compensation_and_Benefit_Plans1

Compensation and Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2014
Pension Plans	'
Pension and Other Postretirement Benefits	'
Expense Components for Plans	'
	Pension expense components for continuing operations are:
		Three months ended							Nine months ended
		September 30,							September 30,
	(in millions)	2014				2013			2014			2013
	Edison International:
	Service cost	$	30			$	38		$	89		$	114
	Interest cost	48				42			141			126
	Expected return on plan assets	(61		)		(58		)	(178		)	(172		)
	Settlement costs1	35				24			35			73
	Amortization of prior service cost	1				1			4			3
	Amortization of net loss2	1				15			3			45
	Expense under accounting standards	$	54			$	62		$	94		$	189
	Regulatory adjustment (deferred)	(2		)		(7		)	59			(21		)
	Total expense recognized	$	52			$	55		$	153		$	168
	SCE:
	Service cost	$	29			$	37		$	87		$	111
	Interest cost	44				41			132			123
	Expected return on plan assets	(56		)		(57		)	(168		)	(171		)
	Settlement costs1	33				24			33			72
	Amortization of prior service cost	1				1			3			3
	Amortization of net loss2	—				14			1			42
	Expense under accounting standards	$	51			$	60		$	88		$	180
	Regulatory adjustment (deferred)	(2		)		(7		)	59			(21		)
	Total expense recognized	$	49			$	53		$	147		$	159
	1	Relates to lump-sum payments made to employees who retired from the SCE Retirement Plan (primarily due to workforce reductions described below). Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International was $2 million for the three and nine months ended September 30, 2014 and zero and $2 million for the three and nine months ended September 30, 2013, respectively.
	2	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, respectively, for the three months ended September 30, 2014, and $5 million and $3 million, respectively, for the nine months ended September 30, 2014. The amount reclassified for Edison International and SCE was $4 million and $3 million, respectively, for the three months ended September 30, 2013, and $11 million and $8 million, respectively, for the nine months ended September 30, 2013.
Postretirement Benefits Other Than Pensions	'
Pension and Other Postretirement Benefits	'
Expense Components for Plans	'
	PBOP expense components for continuing operations are:
		Three months ended							Nine months ended
		September 30,							September 30,
	(in millions)	2014				2013			2014			2013
	Edison International:
	Service cost	$	10			$	14		$	32		$	42
	Interest cost	28				26			82			78
	Expected return on plan assets	(28		)		(30		)	(84		)	(90		)
	Special termination benefits1	—				—			—			10
	Amortization of prior service credit	(9		)		(9		)	(27		)	(27		)
	Amortization of net loss	—				7			—			21
	Total expense	$	1			$	8		$	3		$	34
	SCE:
	Service cost	$	10			$	14		$	32		$	41
	Interest cost	27				26			81			78
	Expected return on plan assets	(28		)		(30		)	(84		)	(90		)
	Special termination benefits1	—				—			—			10
	Amortization of prior service credit	(9		)		(9		)	(27		)	(27		)
	Amortization of net loss	—				7			—			21
	Total expense	$	—			$	8		$	2		$	33
	1	Due to the reduction in workforce, SCE has incurred costs for extended retiree health care coverage.
Southern California Edison	'
Workforce Reductions [Abstract]	'
Workforce reductions	'
	The following table provides a summary of changes in the accrued severance liability associated with these reductions:
	(in millions)
	Balance at January 1, 2014		$	54
	Additions		9
	Payments		(17		)
	Other		(1		)
	Balance at September 30, 2014		$	45

Other_Investments_Tables

Other Investments (Tables) (Southern California Edison)	9 Months Ended
	Sep. 30, 2014
Southern California Edison	'
Investment [Line Items]	'
Amortized Cost and Fair Value of the Trust Investments	'
	The following table sets forth amortized cost and fair value of the trust investments:
		Longest		Amortized Cost						Fair Value
		Maturity
	(in millions)	Dates		September 30,			December 31,			September 30,			December 31, 2013
				2014			2013			2014
	Stocks	—		$	500		$	656		$	1,970		$	2,208
	Municipal bonds	2051		663			675			807			756
	U.S. government and agency securities	2045		826			902			888			947
	Corporate bonds	2057		333			208			385			241
	Short-term investments and receivables/payables	One-year		657			329			691			342
	Total			$	2,979		$	2,770		$	4,741		$	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						Nine months ended
			September 30,						September 30,
	(in millions)		2014			2013			2014			2013
	Balance at beginning of period		$	4,740		$	4,182		$	4,494		$	4,048
	Gross realized gains		149			119			187			261
	Gross realized losses		—			(17		)	—			(18		)
	Unrealized gains (losses), net		(131		)	55			38			46
	Other-than-temporary impairments		(4		)	(15		)	(10		)	(44		)
	Interest, dividends, contributions and other		(13		)	8			32			39
	Balance at end of period		$	4,741		$	4,332		$	4,741		$	4,332

Regulatory_Assets_and_Liabilit1

Regulatory Assets and Liabilities (Tables) (Southern California Edison)	9 Months Ended
	Sep. 30, 2014
Southern California Edison	'
Regulatory Assets [Line Items]	'
Regulatory Assets Included on the Consolidated Balance Sheets	'
	SCE's regulatory assets included on the consolidated balance sheets are:
	(in millions)	September 30,			December 31,
		2014			2013
	Current:
	Regulatory balancing accounts	$	1,101		$	484
	Energy derivatives	64			54
	Other	5			—
	Total current	1,170			538
	Long-term:
	Deferred income taxes, net	3,361			2,957
	Pensions and other postretirement benefits	506			369
	Energy derivatives	721			816
	Unamortized investments, net	275			332
	San Onofre	1,386			1,325
	Unamortized loss on reacquired debt	206			222
	Regulatory balancing accounts	545			818
	Other	329			402
	Total long-term	7,329			7,241
	Total regulatory assets	$	8,499		$	7,779
Regulatory Liabilities Included on the Consolidated Balance Sheets	'
	SCE's regulatory liabilities included on the consolidated balance sheets are:
	(in millions)	September 30,			December 31,
		2014			2013
	Current:
	Regulatory balancing accounts	$	750		$	724
	Other	44			43
	Total current	794			767
	Long-term:
	Costs of removal	2,833			2,780
	Asset retirement obligations	1,769			1,071
	Regulatory balancing accounts	1,085			1,132
	San Onofre	677			—
	Other	23			12
	Total long-term	6,387			4,995
	Total regulatory liabilities	$	7,181		$	5,762
Schedule of Regulatory Balancing Accounts	'
	The following table summarizes the significant components of regulatory balancing accounts included in the above tables of regulatory assets and liabilities:
	(in millions)	September 30,			December 31,
		2014			2013
	Asset (liability)
	Energy resource recovery account	$	1,570		$	1,005
	Four Corners memorandum account	6			145
	New system generation balancing account	117			132
	Public purpose programs and energy efficiency programs	(832		)	(1,037		)
	Base rate recovery balancing account	(243		)	(247		)
	Greenhouse gas auction revenue	(300		)	(385		)
	FERC formula rates and FERC balancing accounts	(89		)	(59		)
	FERC energy settlements	(195		)	—
	Other	(223		)	(108		)
	Net liability	$	(189	)	$	(554	)

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Components of Accumulated Other Comprehensive Loss	'
	Edison International's accumulated other comprehensive loss, net of tax consist of:
		Three months ended September 30,						Nine months ended September 30,
	(in millions)	2014			2013			2014			2013
	Beginning balance	$	(13	)	$	(82	)	$	(13	)	$	(87	)
	Pension and PBOP – net gain (loss):
	Other comprehensive loss before reclassifications	(12		)	—			(17		)	(2		)
	Reclassified from accumulated other comprehensive loss1	3			3			6			10
	Other	(1		)	—			1			—
	Change	(10		)	3			(10		)	8
	Ending Balance	$	(23	)	$	(79	)	$	(23	)	$	(79	)
	1	These items are included in the computation of net periodic pension and PBOP expense. See Note 8 for additional information.
Southern California Edison	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Components of Accumulated Other Comprehensive Loss	'
	SCE's accumulated other comprehensive loss, net of tax consist of:
		Three months ended September 30,						Nine months ended September 30,
	(in millions)	2014			2013			2014			2013
	Beginning balance	$	(8	)	$	(30	)	$	(11	)	$	(29	)
	Pension and PBOP – net gain (loss):
	Other comprehensive loss before reclassifications	—			—			—			(4		)
	Reclassified from accumulated other comprehensive loss1	1			2			2			5
	Other	(1		)	—			1			—
	Change	—			2			3			1
	Ending Balance	$	(8	)	$	(28	)	$	(8	)	$	(28	)
	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 Other Expenses (Tables)	9 Months Ended
	Sep. 30, 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				Nine months ended
		September 30,				September 30,
	(in millions)	2014		2013		2014		2013
	SCE interest and other income:
	FERC energy settlements	$	1	$	—	$	15	$	—
	Equity allowance for funds used during construction	19		14		50		54
	Increase in cash surrender value of life insurance policies and life insurance benefits	10		10		28		24
	Interest income	1		2		6		8
	Other	5		1		6		3
	Total SCE interest and other income	36		27		105		89
	Edison International Parent and Other other income	4		1		4		2
	Total Edison International interest and other income	$	40	$	28	$	109	$	91
	SCE other expenses:
	Penalties	$	15	$	—	$	15	$	—
	Civic, political and related activities and donations	8		9		22		24
	Other	6		6		15		14
	Total SCE other expenses	29		15		52		38
	Edison International Parent and Other other expenses	—		—		—		—
	Total Edison International other expenses	$	29	$	15	$	52	$	38

Supplemental_Cash_Flows_Inform1

Supplemental Cash Flows Information (Tables)	9 Months Ended
	Sep. 30, 2014
Supplemental Cash Flow Elements [Abstract]	'
Supplemental Cash Flows Information	'
	Supplemental cash flows information for continuing operations is:
		Edison International				SCE
		Nine months ended September 30,
	(in millions)	2014		2013		2014		2013
	Cash payments for interest and taxes:
	Interest, net of amounts capitalized	$	412	$	431	$	411	$	415
	Tax payments, net	190		27		15		18
	Non-cash financing and investing activities:
	Dividends declared but not paid:
	Common stock	$	116	$	110	$	126	$	120
	Preferred and preference stock	4		4		4		4
	Notes issued under EME Settlement Agreement	410		—		—		—

Summary_of_Significant_Account3

Summary of Significant Accounting Policies (Details) (Southern California Edison, Electric Utility)	9 Months Ended
	Sep. 30, 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 Revision to Consolidated Statement of Cash Flow (Details) (USD $)	9 Months Ended		12 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended		12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2013	Mar. 31, 2014	Jun. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2013
				As Reported	As Reported	Adjustment	Adjustment	Adjustment	Adjustment	Southern California Edison	Southern California Edison	Southern California Edison	Southern California Edison	Southern California Edison	Southern California Edison	Southern California Edison
													As Reported	As Reported	Adjustment	Adjustment
Regulatory impacts of net nuclear decommissioning trust earnings	$100	$82	$76	$265	$312	'	'	($183)	($236)	$100	$82	$76	$265	$312	($183)	($236)
Net cash provided by operating activities	2,027	2,070	2,967	2,253	3,203	67	5	-183	-236	2,513	2,163	3,048	2,346	3,284	-183	-236
Purchases of nuclear decommissioning trust investments	-5,951	-4,674	-5,715	-4,857	-5,951	'	'	183	236	-5,951	-4,674	-5,715	-4,857	-5,951	183	236
Net cash used by investing activities	$2,936	$2,905	$3,572	$3,088	$3,808	$67	$5	($183)	($236)	$2,908	$2,882	$3,547	$3,065	$3,783	($183)	($236)

Summary_of_Significant_Account5

Summary of Significant Accounting Policies (Cash) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 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	$40	$68
Cash reclassified to accounts payable	191	168
Southern California Edison	'	'
Cash and Cash Equivalents Items [Line Items]	'	'
Money market funds	8	8
Cash reclassified to accounts payable	$190	$163

Summary_of_Significant_Account6

Summary of Significant Accounting Policies (Earnings Per Share) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Basic earnings per share - continuing operations:	'	'	'	'
Income from continuing operations, net of tax	$496	$463	$1,046	$615
Weighted average common shares outstanding (in shares)	326,000,000	326,000,000	326,000,000	326,000,000
Basic earnings per share b continuing operations (in dollars per share)	$1.52	$1.42	$3.21	$1.88
Diluted earnings per share - continuing operations:	'	'	'	'
Income from continuing operations, net of tax	496	463	1,046	615
Income impact of assumed conversions	0	0	1	1
Income from continuing operations available to common shareholders and assumed conversions	$496	$463	$1,047	$616
Weighted average common shares outstanding (in shares)	326,000,000	326,000,000	326,000,000	326,000,000
Incremental shares from assumed conversions (in shares)	3,000,000	2,000,000	3,000,000	3,000,000
Adjusted weighted average shares - diluted (in shares)	329,000,000	328,000,000	329,000,000	329,000,000
Diluted earnings per share b continuing operations (in dollars per share)	$1.51	$1.41	$3.18	$1.87
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)	38,800	4,109,363	62,885	4,109,363

Summary_of_Significant_Account7

Summary of Significant Accounting Policies Asset Retirement Obligation (Details) (USD $)	9 Months Ended		12 Months Ended
	Sep. 30, 2014		Dec. 31, 2013		Jun. 30, 2014
Significant Accounting Policies [Line Items]	'		'		'
Decommissioning Costs, Future Value	'		'		$4,400,000,000
Asset Retirement Obligation, Discount Rate (percent)	6.30%		'		'
Southern California Edison	'		'		'
Significant Accounting Policies [Line Items]	'		'		'
Decommissioning Costs, Future Value	'		'		3,300,000,000
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'		'		'
Beginning balance	3,418,000,000		2,782,000,000		'
Accretion1	150,000,000	[1]	182,000,000	[1]	'
Revisions	-604,000,000		455,000,000		'
Liabilities settled	-4,000,000		-1,000,000		'
Ending balance	2,960,000,000		3,418,000,000		'
Southern California Edison | San Onofre	'		'		'
Significant Accounting Policies [Line Items]	'		'		'
Asset Retirement Obligation, Discount Rate (percent)	6.30%		'		'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'		'		'
Beginning balance	2,700,000,000		'		'
Revisions	604,000,000		'		'
Ending balance	$2,200,000,000		'		'
[1]	An ARO represents the present value of a future obligation. Accretion is an increase in the liability to account for the time value of money resulting from discounting.

Consolidated_Statements_of_Cha2

Consolidated Statements of Changes in Equity (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Balance, at the beginning of the period	'	'	$11,691	$11,191
Net income	508	463	1,276	689
Other comprehensive income (loss)	-10	3	-10	8
Common stock dividends declared	'	'	-347	-330
Dividends, distributions to noncontrolling interests and other	'	'	-84	-75
Stock-based compensation and other	'	'	-57	-40
Noncash stock-based compensation and other	'	'	20	12
Issuance of preference stock	'	'	269	387
Redemption of preference stock	'	'	'	-400
Balance, at the end of the period	12,758	11,442	12,758	11,442
Dividends declared per common share (in dollars per share)	$0.36	$0.34	$1.06	$1.01
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	0
Common stock dividends declared	'	'	0	0
Dividends, distributions to noncontrolling interests and other	'	'	0	0
Stock-based compensation and other	'	'	22	5
Noncash stock-based compensation and other	'	'	20	19
Issuance of preference stock	'	'	0	0
Redemption of preference stock	'	'	'	0
Balance, at the end of the period	2,445	2,397	2,445	2,397
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)	'	'	-10	8
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	-23	-79	-23	-79
Retained Earnings	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Balance, at the beginning of the period	'	'	7,548	7,146
Net income	'	'	1,192	614
Other comprehensive income (loss)	'	'	0	0
Common stock dividends declared	'	'	-347	-330
Dividends, distributions to noncontrolling interests and other	'	'	0	0
Stock-based compensation and other	'	'	-79	-45
Noncash stock-based compensation and other	'	'	0	-6
Issuance of preference stock	'	'	0	0
Redemption of preference stock	'	'	'	-8
Balance, at the end of the period	8,314	7,371	8,314	7,371
Subtotal	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Balance, at the beginning of the period	'	'	9,938	9,432
Net income	'	'	1,192	614
Other comprehensive income (loss)	'	'	-10	8
Common stock dividends declared	'	'	-347	-330
Dividends, distributions to noncontrolling interests and other	'	'	0	0
Stock-based compensation and other	'	'	-57	-40
Noncash stock-based compensation and other	'	'	20	13
Issuance of preference stock	'	'	0	0
Redemption of preference stock	'	'	'	-8
Balance, at the end of the period	10,736	9,689	10,736	9,689
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	'	'	84	75
Other comprehensive income (loss)	'	'	0	0
Common stock dividends declared	'	'	0	0
Dividends, distributions to noncontrolling interests and other	'	'	-84	-75
Stock-based compensation and other	'	'	0	0
Noncash stock-based compensation and other	'	'	0	-1
Issuance of preference stock	'	'	269	387
Redemption of preference stock	'	'	'	-392
Balance, at the end of the period	2,022	1,753	2,022	1,753
Southern California Edison	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Balance, at the beginning of the period	'	'	12,138	11,743
Net income	531	502	1,156	717
Other comprehensive income (loss)	0	2	3	1
Common stock dividends declared	'	'	-378	-360
Dividends on preferred and preference stock	'	'	-84	-75
Stock-based compensation and other	'	'	-34	-36
Noncash stock-based compensation and other	'	'	5	14
Issuance of preference stock	'	'	269	387
Redemption of preference stock	'	'	'	-400
Balance, at the end of the period	13,075	11,991	13,075	11,991
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	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	'	'	13	3
Noncash stock-based compensation and other	'	'	9	10
Issuance of preference stock	'	'	-6	-13
Redemption of preference stock	'	'	'	8
Balance, at the end of the period	608	589	608	589
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)	'	'	3	1
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	-8	-28	-8	-28
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	'	'	1,156	717
Other comprehensive income (loss)	'	'	0	0
Common stock dividends declared	'	'	-378	-360
Dividends on preferred and preference stock	'	'	-84	-75
Stock-based compensation and other	'	'	-47	-39
Noncash stock-based compensation and other	'	'	-4	4
Issuance of preference stock	'	'	0	0
Redemption of preference stock	'	'	'	-8
Balance, at the end of the period	8,237	7,467	8,237	7,467
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	$2,070	$1,795

Variable_Interest_Entities_Det

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

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Mar. 31, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

SCE Trust I

SCE Trust I

SCE Trust I

SCE Trust I

SCE Trust I

SCE Trust I

SCE Trust I

SCE Trust I

SCE Trust II

SCE Trust II

SCE Trust II

SCE Trust II

SCE Trust II

SCE Trust II

SCE Trust II

SCE Trust II

SCE Trust III

SCE Trust III

SCE Trust III

SCE Trust III

SCE Trust III

Variable Interest Entity, Not Primary Beneficiary

Variable Interest Entity, Not Primary Beneficiary

Variable Interest Entity, Not Primary Beneficiary

Variable Interest Entity, Not Primary Beneficiary

Trust Securities

Trust Securities

Series F Preferred Stock

Series F Preferred Stock

Trust Securities

Trust Securities

Series G Preferred Stock

Series G Preferred Stock

Trust Securities

Series H Preferred Stock

Series H Preferred Stock

SCE Power Purchase Contracts

SCE Power Purchase Contracts

SCE Power Purchase Contracts

SCE Power Purchase Contracts

MW

MW

MW

MW

Variable Interest Entity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Variable Interest Entities, Dividend Income

$7,000,000

$7,000,000

$20,000,000

$20,000,000

'

'

'

'

$5,000,000

$5,000,000

$15,000,000

$14,000,000

'

'

'

'

$4,000,000

$9,000,000

'

'

'

'

'

'

'

Variable Interest Entities, Dividend Distributions

7,000,000

7,000,000

20,000,000

20,000,000

'

'

'

'

5,000,000

5,000,000

15,000,000

14,000,000

'

'

'

'

4,000,000

9,000,000

'

'

'

'

'

'

'

Details of projects or entities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Power generating capacity (in megawatts)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,341

5,290

5,341

5,290

Payments to unconsolidated VIEs for power purchase contracts

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

319,000,000

330,000,000

526,000,000

527,000,000

Future Power Generating Capacity of Projects Owned Controlled

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

251

'

251

'

Unconsolidated Trust

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Security dividend rate, (as a percent)

'

'

'

'

5.63%

'

'

'

'

'

'

'

5.10%

'

'

'

'

'

5.75%

5.75%

'

'

'

'

'

Liquidation preference

'

'

'

'

475,000,000

475,000,000

475,000,000

475,000,000

'

'

'

'

400,000,000

400,000,000

400,000,000

400,000,000

'

'

275,000,000

'

275,000,000

'

'

'

'

Liquidation value (in dollars per share)

'

'

'

'

$25

'

$2,500

'

'

'

'

'

$25

'

$2,500

'

'

'

$25

$2,500

$2,500

'

'

'

'

Common stock

'

'

'

'

$10,000

$10,000

'

'

'

'

'

'

$10,000

$10,000

'

'

'

'

$10,000

'

'

'

'

'

'

Fair_Value_Measurements_Fair_V

Fair Value Measurements (Fair Value by Level) (Details) (USD $)	Sep. 30, 2014		Jun. 30, 2014	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Assets at Fair Value	'		'	'		'	'	'
Nuclear decommissioning trusts	$4,741		'	$4,494		'	'	'
Liabilities at Fair Value	'		'	'		'	'	'
Money market funds	40		'	68		'	'	'
Southern California Edison	'		'	'		'	'	'
Assets at Fair Value	'		'	'		'	'	'
Nuclear decommissioning trusts	4,741		4,740	4,494		4,332	4,182	4,048
Liabilities at Fair Value	'		'	'		'	'	'
Percentage of equity investments located in the United States (as a percent)	69.00%		'	70.00%		'	'	'
Collateralized mortgage obligations and other asset backed securities	58		'	47		'	'	'
Receivables (payables) net related to investments	5		'	12		'	'	'
Money market funds	8		'	8		'	'	'
Southern California Edison | Fair Value, Measurements, Recurring | Level 1	'		'	'		'	'	'
Assets at Fair Value	'		'	'		'	'	'
Derivative contracts	0		'	0		'	'	'
Other	35		'	39		'	'	'
Nuclear decommissioning trusts	3,379	[1]	'	3,380	[1]	'	'	'
Total assets	3,414		'	3,419		'	'	'
Liabilities at Fair Value	'		'	'		'	'	'
Derivative contracts	0		'	0		'	'	'
Total liabilities	0		'	0		'	'	'
Net assets (liabilities)	3,414		'	3,419		'	'	'
Southern California Edison | Fair Value, Measurements, Recurring | Level 1 | Stocks	'		'	'		'	'	'
Assets at Fair Value	'		'	'		'	'	'
Nuclear decommissioning trusts	1,970	[2]	'	2,208	[2]	'	'	'
Southern California Edison | Fair Value, Measurements, Recurring | Level 1 | Fixed income	'		'	'		'	'	'
Assets at Fair Value	'		'	'		'	'	'
Nuclear decommissioning trusts	744	[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	665		'	331		'	'	'
Southern California Edison | Fair Value, Measurements, Recurring | Level 2	'		'	'		'	'	'
Assets at Fair Value	'		'	'		'	'	'
Derivative contracts	5		'	11		'	'	'
Other	0		'	0		'	'	'
Nuclear decommissioning trusts	1,357	[1]	'	1,102	[1]	'	'	'
Total assets	1,362		'	1,113		'	'	'
Liabilities at Fair Value	'		'	'		'	'	'
Derivative contracts	6		'	37		'	'	'
Total liabilities	6		'	37		'	'	'
Net assets (liabilities)	1,356		'	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	1,336	[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	21		'	0		'	'	'
Southern California Edison | Fair Value, Measurements, Recurring | Level 3	'		'	'		'	'	'
Assets at Fair Value	'		'	'		'	'	'
Derivative contracts	343		'	372		'	'	'
Other	0		'	0		'	'	'
Nuclear decommissioning trusts	0	[1]	'	0	[1]	'	'	'
Total assets	343		'	372		'	'	'
Liabilities at Fair Value	'		'	'		'	'	'
Derivative contracts	1,101		'	1,177		'	'	'
Total liabilities	1,101		'	1,177		'	'	'
Net assets (liabilities)	-758		'	-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	0	[4]	'	-10	[4]	'	'	'
Other	0	[4]	'	0	[4]	'	'	'
Nuclear decommissioning trusts	0	[1],[4]	'	0	[1],[4]	'	'	'
Total assets	0	[4]	'	-10	[4]	'	'	'
Liabilities at Fair Value	'		'	'		'	'	'
Derivative contracts	-6	[4]	'	-20	[4]	'	'	'
Total liabilities	-6	[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	348		'	373		'	'	'
Other	35		'	39		'	'	'
Nuclear decommissioning trusts	4,736	[1]	'	4,482	[1]	'	'	'
Total assets	5,119		'	4,894		'	'	'
Liabilities at Fair Value	'		'	'		'	'	'
Derivative contracts	1,101		'	1,194		'	'	'
Total liabilities	1,101		'	1,194		'	'	'
Net assets (liabilities)	4,018		'	3,700		'	'	'
Southern California Edison | Fair Value, Measurements, Recurring | Total | Stocks	'		'	'		'	'	'
Assets at Fair Value	'		'	'		'	'	'
Nuclear decommissioning trusts	1,970	[2]	'	2,208	[2]	'	'	'
Southern California Edison | Fair Value, Measurements, Recurring | Total | Fixed income	'		'	'		'	'	'
Assets at Fair Value	'		'	'		'	'	'
Nuclear decommissioning trusts	2,080	[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	$686		'	$331		'	'	'
[1]	Excludes net receivables of $5 million and net receivables of $12 million at SeptemberB 30, 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 69% and 70% of SCE's equity investments were located in the United States at SeptemberB 30, 2014 and DecemberB 31, 2013, respectively.
[3]	At SeptemberB 30, 2014 and DecemberB 31, 2013, SCE's corporate bonds were diversified and included collateralized mortgage obligations and other asset backed securities of $58 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				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013
Southern California Edison | Level 3	'		'		'		'		'	'
Fair Value Disclosures Level 3 [Roll Forward]	'		'		'		'		'	'
Fair value of net liabilities at beginning of period	($878)		($967)		($805)		($791)		($758)	($1,031)
Total realized/unrealized gains (losses):	'		'		'		'		'	'
Included in regulatory assets and liabilities	120	[1]	-50	[1]	43	[1]	-205	[1]	'	'
Purchases	7		19		22		56		'	'
Settlements	-7		-33		-18		-91		'	'
Change during the period in unrealized losses related to assets and liabilities held at the end of the period	$71		($65)		($12)		($198)		'	'
[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) (Southern California Edison, Level 3, USD $)	9 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
	MW	MW
Congestion Revenue Rights | Market Simulation Model	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Fair Value, Assets	339	366
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)	7,630	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)	25,431	24,896
Congestion Revenue Rights | Market Simulation Model | Power Prices | Minimum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Fair Value Inputs, Price Level	1.65	-9.86
Congestion Revenue Rights | Market Simulation Model | Power Prices | Maximum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Fair Value Inputs, Price Level	109.95	108.56
Congestion Revenue Rights | Market Simulation Model | Gas Prices | Minimum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Fair Value Inputs, Price Level	3.65	3.5
Congestion Revenue Rights | Market Simulation Model | Gas Prices | Maximum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Fair Value Inputs, Price Level	6.53	7.1
Tolling | Option Model	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Fair Value, Assets	0	5
Fair Value, Liabilities	1,095	1,175
Tolling | Option Model | Power Prices | Minimum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Fair Value Inputs, Price Level	36.8	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]	'	'
Fair Value Inputs, Price Level	65.6	63.9
Expected volatility rate (as a percent)	45.00%	45.00%
Tolling | Option Model | Power Prices | Weighted Average	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Fair Value Inputs, Price Level	48.9	47.4
Expected volatility rate (as a percent)	31.00%	30.00%
Tolling | Option Model | Gas Prices | Minimum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Expected volatility rate (as a percent)	12.00%	16.00%
Tolling | Option Model | Gas Prices | Maximum	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Expected volatility rate (as a percent)	40.00%	35.00%
Tolling | Option Model | Gas Prices | Weighted Average	'	'
Quantitative Information About Level 3 Measurements [Line Items]	'	'
Expected volatility rate (as a percent)	19.00%	21.00%

Fair_Value_Measurements_Fair_V1

Fair Value Measurements (Fair Value of Long-Term Debt Recorded at Carrying Value) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value of Long-Term Debt Recorded at Carrying Value	'	'
Carrying Value	$10,837	$10,426
Fair Value	12,134	11,084
Southern California Edison	'	'
Fair Value of Long-Term Debt Recorded at Carrying Value	'	'
Carrying Value	10,023	10,022
Fair Value	$11,295	$10,656

Debt_and_Credit_Agreements_Det

Debt and Credit Agreements (Details) (USD $)

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Mar. 31, 2014

Sep. 30, 2014

Jul. 31, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Jul. 31, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Edison International Parent and Other

Edison International Parent and Other

Edison International Parent and Other

Edison International Parent and Other

Edison International Parent and Other

Commercial paper

Commercial paper

Commercial paper

Letters of credit

Letters of credit

First and refunding mortgage bonds

First and refunding mortgage bonds

Revolving credit facility

Revolving credit facility

Revolving credit facility

Non-interest Bearing Promissory Notes Due in September 2015

Non-interest Bearing Promissory Notes Due in September 2016

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Issuance of debt

'

'

'

'

$400,000,000

$300,000,000

'

'

'

$204,000,000

$214,000,000

'

'

'

'

'

Outstanding borrowings

'

'

'

'

'

'

'

'

'

'

'

379,000,000

'

175,000,000

'

'

Weighted average interest rate (as a percent)

'

'

'

'

'

'

0.27%

'

0.55%

'

'

0.22%

'

0.24%

'

'

Commitment

'

'

'

'

'

'

'

1,250,000,000

'

'

'

'

2,750,000,000

'

'

'

Outstanding letters of credit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

226,000,000

Letters of credit expiration period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'12 months

'

Short-term debt

$1,349,000,000

$209,000,000

$679,000,000

$175,000,000

'

'

$670,000,000

'

$34,000,000

'

'

'

'

'

'

'

Stated interest rate on May 2014 mortgage bonds due in May 2017

'

'

'

'

1.13%

'

'

'

'

'

'

'

'

'

'

'

Derivative_Instruments_Balance

Derivative Instruments (Balance Sheet Disclosures) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value of Derivative Instruments	'		'
Short-Term, Derivative Assets	$103		$122
Long-Term, Derivative Assets	245		251
Short-Term, Derivative Liabilities	154		152
Long-Term, Derivative Liabilities	947		1,042
Southern California Edison	'		'
Fair Value of Derivative Instruments	'		'
Short-Term, Derivative Assets	103		122
Long-Term, Derivative Assets	245		251
Short-Term, Derivative Liabilities	154		152
Long-Term, Derivative Liabilities	947		1,042
Southern California Edison | Electric Utility | Economic hedges	'		'
Derivatives	'		'
Collateral Already Posted, Aggregate Fair Value	0		'
Southern California Edison | Commodity Contracts | Electric Utility	'		'
Fair Value of Derivative Instruments	'		'
Short-Term, Derivative Assets	103		122
Long-Term, Derivative Assets	245		251
Derivative Assets, Total	348		373
Short-Term, Derivative Liabilities	154		152
Long-Term, Derivative Liabilities	947		1,042
Derivative Liabilities, Total	1,101		1,194
Net Liability	753		821
Southern California Edison | Commodity Contracts | Electric Utility | Economic hedges	'		'
Fair Value of Derivative Instruments	'		'
Short-Term, Derivative Assets	103		141
Long-Term, Derivative Assets	245		251
Derivative Assets, Total	348		392
Short-Term, Derivative Liabilities	159		178
Long-Term, Derivative Liabilities	948		1,045
Derivative Liabilities, Total	1,107		1,223
Net Liability	759		831
Southern California Edison | Commodity Contracts | Electric Utility | Netting and Collateral	'		'
Fair Value of Derivative Instruments	'		'
Short-Term, Derivative Assets	'		-19
Long-Term, Derivative Assets	'		0
Derivative Assets, Total	'		-19
Short-Term, Derivative Liabilities	'		-19
Long-Term, Derivative Liabilities	'		0
Derivative Liabilities, Total	'		-19
Net Liability	'		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	-5	[1]	-7	[1]
Long-Term, Derivative Liabilities	-1	[1]	-3	[1]
Derivative Liabilities, Total	-6	[1]	-10	[1]
Net Liability	-6	[1]	-10	[1]
Other Current Assets | Southern California Edison | Commodity Contracts	'		'
Derivatives	'		'
Collateral Already Posted, Aggregate Fair Value	$6		$19
[1]	In addition, at SeptemberB 30, 2014 and DecemberB 31, 2013, SCE had posted $6 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)	Sep. 30, 2014	Dec. 31, 2013
	GWh	GWh
Electricity options, swaps and forwards (GWh)	'	'
Derivatives	'	'
Notional volumes of derivative instruments	2,519	6,274
Natural gas options, swaps and forwards (Bcf)	'	'
Derivatives	'	'
Notional volumes of derivative instruments	7	12
Congestion revenue rights (GWh)	'	'
Derivatives	'	'
Notional volumes of derivative instruments	120,075	149,234
Tolling arrangements (GWh)	'	'
Derivatives	'	'
Notional volumes of derivative instruments	82,333	87,991

Derivative_Instruments_Additio

Derivative Instruments (Additional Disclosures) (Details) (Southern California Edison, USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Electric Utility | Economic hedges	'	'	'	'	'
Derivatives	'	'	'	'	'
Realized losses	($18)	($15)	($59)	($38)	'
Unrealized losses	138	-41	80	-159	'
Aggregate fair value of all derivative liabilities with credit-risk-related contingent features	38	'	38	'	49
Potential amount of collateral to be posted if contingencies triggered	26	'	26	'	'
Collateral already posted	0	'	0	'	'
Other Current Assets | Commodity Contracts	'	'	'	'	'
Derivatives	'	'	'	'	'
Collateral already posted	$6	'	$6	'	$19

Income_Taxes_Tax_Rate_Reconcil

Income Taxes (Tax Rate Reconciliation) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Effective Tax Rate	'	'	'	'
Income from continuing operations before income taxes	$744	$665	$1,414	$863
Provision for income tax at federal statutory rate of 35%	260	233	495	302
State tax, net of federal benefit	28	22	34	5
Property-related	-73	-57	-179	-121
Change related to uncertain tax positions	10	-5	-4	13
San Onofre OII settlement	0	0	-40	0
Other	-5	-16	-22	-26
Total income tax expense from continuing operations	220	177	284	173
Effective Tax Rate Excluding Income Attributable to Noncontrolling Interests	29.60%	26.60%	20.10%	20.00%
Federal statutory rate	35.00%	35.00%	35.00%	35.00%
Southern California Edison	'	'	'	'
Effective Tax Rate	'	'	'	'
Income from continuing operations before income taxes	755	685	1,466	913
Provision for income tax at federal statutory rate of 35%	264	240	513	319
State tax, net of federal benefit	31	21	42	12
Property-related	-73	-57	-179	-121
Change related to uncertain tax positions	9	-6	-1	11
San Onofre OII settlement	0	0	-40	0
Other	-7	-15	-25	-25
Total income tax expense from continuing operations	$224	$183	$310	$196
Effective Tax Rate Excluding Income Attributable to Noncontrolling Interests	29.70%	26.70%	21.10%	21.50%
Federal statutory rate	35.00%	35.00%	35.00%	35.00%

Income_Taxes_Textual_Details

Income Taxes (Textual) (Details) (USD $)

3 Months Ended

9 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2014

Jun. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2015

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Jun. 30, 2014

Tax Years 2003 to 2006

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

IRS Examination

Tax Years 2003 to 2006

Tax Years 2003 to 2006

Tax Years 2007 to 2009

Tax Years 2003 to 2010

Scenario, Forecast

IRS Examination

IRS Examination

IRS Examination

IRS Examination

Proposed Adjustment to Taxable Gain

Disallowance of Repair Allowance Deduction

Disallowance of Repair Allowance Deduction

Disallowance of Repair Allowance Deduction

Income Tax Disclosure [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Reduction to revenue from repair deductions, before tax

'

'

'

'

'

'

'

'

$231

'

'

'

'

'

Estimated potential future federal tax payment as of the balance sheet date, including interest and penalties, based on a proposed adjustment

'

'

'

'

'

'

'

'

'

'

212

102

76

'

Deposit against IRS tax dispute adjustment

'

189

'

'

'

'

'

'

'

'

'

'

'

'

Estimated tax benefits

'

'

'

'

'

50

'

'

'

'

'

14

16

'

Income Tax Expense (Benefit)

($220)

'

($177)

($284)

($173)

'

($224)

($183)

($310)

($196)

'

'

'

$29

Compensation_and_Benefit_Plans2

Compensation and Benefit Plans (Expense Components) (Details) (USD $)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Aug. 31, 2014	Dec. 31, 2013
Pension and Other Postretirement Benefits	'		'		'		'		'	'
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax	($1)		$0		$1		$0		'	'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'		'		'		'		'	'
Defined Benefit Plan, Actuarial Gain (Loss)	'		'		158		'		'	'
Defined Benefit Plan, Funded Status of Plan	'		'		'		'		559	478
Postretirement Benefits Other Than Pensions	'		'		'		'		'	'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'		'		'		'		'	'
Service cost	10		14		32		42		'	'
Interest cost	28		26		82		78		'	'
Expected return on plan assets	-28		-30		-84		-90		'	'
Special Termination Benefits	0	[1]	0	[1]	0	[1]	10	[1]	'	'
Amortization of prior service cost	-9		-9		-27		-27		'	'
Amortization of net loss	0		7		0		21		'	'
Expense under accounting standards	1		8		3		34		'	'
Pension Plans	'		'		'		'		'	'
Pension and Other Postretirement Benefits	'		'		'		'		'	'
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax	2		0		2		2		'	'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'		'		'		'		'	'
Service cost	30		38		89		114		'	'
Interest cost	48		42		141		126		'	'
Expected return on plan assets	-61		-58		-178		-172		'	'
Settlement costs	35	[2]	24	[2]	35	[2]	73	[2]	'	'
Amortization of prior service cost	1		1		4		3		'	'
Amortization of net loss	1	[3]	15	[3]	3	[3]	45	[3]	'	'
Expense under accounting standards	54		62		94		189		'	'
Regulatory adjustment	-2		-7		59		-21		'	'
Total expense recognized	52		55		153		168		'	'
Net loss reclassified	2		4		5		11		'	'
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate (percent)	'		'		'		'		4.00%	4.75%
Southern California Edison	'		'		'		'		'	'
Pension and Other Postretirement Benefits	'		'		'		'		'	'
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax	-1		0		1		0		'	'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'		'		'		'		'	'
Defined Benefit Plan, Actuarial Gain (Loss)	'		'		146		'		'	'
Defined Benefit Plan, Funded Status of Plan	'		'		'		'		518	449
Southern California Edison | Postretirement Benefits Other Than Pensions	'		'		'		'		'	'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'		'		'		'		'	'
Service cost	10		14		32		41		'	'
Interest cost	27		26		81		78		'	'
Expected return on plan assets	-28		-30		-84		-90		'	'
Special Termination Benefits	0	[1]	0	[1]	0	[1]	10	[1]	'	'
Amortization of prior service cost	-9		-9		-27		-27		'	'
Amortization of net loss	0		7		0		21		'	'
Expense under accounting standards	0		8		2		33		'	'
Southern California Edison | Pension Plans	'		'		'		'		'	'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'		'		'		'		'	'
Service cost	29		37		87		111		'	'
Interest cost	44		41		132		123		'	'
Expected return on plan assets	-56		-57		-168		-171		'	'
Settlement costs	33	[2]	24	[2]	33	[2]	72	[2]	'	'
Amortization of prior service cost	1		1		3		3		'	'
Amortization of net loss	0	[3]	14	[3]	1	[3]	42	[3]	'	'
Expense under accounting standards	51		60		88		180		'	'
Regulatory adjustment	-2		-7		59		-21		'	'
Total expense recognized	49		53		147		159		'	'
Net loss reclassified	$1		$3		$3		$8		'	'
[1]	Due to the reduction in workforce, SCE has incurred costs for extended retiree health care coverage.
[2]	Relates to lump-sum payments made to employees who retired from the SCE Retirement Plan (primarily due to workforce reductions described below). Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International was $2 million for the three and nine months ended September 30, 2014 and zero and $2B million for the three and nine months ended September 30, 2013, respectively.
[3]	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, respectively, for the three months ended September 30, 2014, and $5 million and $3B million, respectively, for the nine months ended September 30, 2014. The amount reclassified for Edison International and SCE was $4 million and $3B million, respectively, for the three months ended September 30, 2013, and $11 million and $8B million, respectively, for the nine months ended September 30, 2013.

Compensation_and_Benefit_Plans3

Compensation and Benefit Plans (Workforce Reduction) (Details) (Southern California Edison, Employee severance, USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Southern California Edison | Employee severance	'
Restructuring Reserve [Roll Forward]	'
Beginning balance	$54
Additions	9
Payments	-17
Restructuring Reserve, Other Changes	-1
Ending balance	$45

Compensation_and_Benefit_Plans4

Compensation and Benefit Plans (Textual) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Pension Plans	'
Pension and Other Postretirement Benefits	'
Employer contributions	$155
Estimated future contributions in remainder of 2014	7
Postretirement Benefits Other Than Pensions	'
Pension and Other Postretirement Benefits	'
Employer contributions	11
Estimated future contributions in remainder of 2014	4
Southern California Edison | Pension Plans	'
Pension and Other Postretirement Benefits	'
Employer contributions	131
Estimated future contributions in remainder of 2014	2
Employee severance | Southern California Edison	'
Pension and Other Postretirement Benefits	'
Estimated cash severance payments	$222

San_Onofre_Issues_Details

San Onofre Issues (Details) (USD $)

3 Months Ended

9 Months Ended

12 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

3 Months Ended

9 Months Ended

16 Months Ended

9 Months Ended

12 Months Ended

12 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Dec. 31, 2013

Jun. 28, 2014

Sep. 30, 2014

Dec. 31, 2011

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Feb. 01, 2012

Jun. 30, 2014

Mar. 31, 2014

Sep. 30, 2014

Jun. 06, 2013

Dec. 31, 2013

31-May-13

Sep. 30, 2014

Dec. 31, 2012

Feb. 01, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2014

Sep. 30, 2014

Jun. 28, 2014

Sep. 30, 2014

31-May-13

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

San Onofre (nuclear)

San Onofre (nuclear)

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Mitsubishi Heavy Industries Ltd

San Onofre

San Onofre

Insurance Claims

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

Southern California Edison

Southern California Edison

Replacement Steam Generators

Replacement Steam Generators

Replacement Steam Generators

Property, plant and equipment

Refunds of excess revenue

2012 Period

2013-2014 Periods

Insurance Claims

Insurance Claims

Other Insurance Claims

Disallowance Of SGRP Investment

Refund of SGRP Revenue Previously Recognized

Refund Of Flow Through Tax Benefits

Regulatory Assets [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Decommissioning Nuclear Facilities Net Investment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$597

'

'

'

'

'

'

'

'

'

'

'

'

'

Incremental Inspection and Repair Costs

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

99

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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%

'

'

'

'

'

'

'

'

'

Public Utilities, Approved Incentive, Rate (percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount of assets reclassified to a regulatory asset

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,521

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Impairment and other charges

-3

0

228

575

'

'

'

'

'

0

0

231

575

'

'

575

231

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Impairment and other charges net of tax

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

365

96

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cumulative Impact of Settlement

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

806

'

'

'

'

'

'

'

'

'

'

'

'

'

542

159

71

'

'

'

Regulatory assets

7,329

'

7,329

'

7,241

'

'

7,329

'

7,329

'

7,329

'

7,241

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,386

1,325

Regulatory liabilities

6,387

'

6,387

'

4,995

'

'

6,387

'

6,387

'

6,387

'

4,995

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

677

0

Cumulative Impact of Settlement, Net of Tax

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

461

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net regulatory asset

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-1,300

'

'

'

'

-1,560

266

'

'

'

'

'

'

'

'

'

'

'

Regulatory assets

'

'

'

'

'

'

'

300

'

300

'

300

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Annual Contribution to Environmental Remediation Study

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4

'

Period of Environmental Remediation Study Contribution (duration)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'5 years

'

Insurance Claims, Estimated Amount

'

'

'

'

'

'

427

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

334

'

'

'

'

'

'

'

Reduction in Policy Benefits Following Retirement of Assets (percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

90.00%

'

'

'

'

'

'

'

'

Ratepayer Allocation of Recovery from Recoveries (percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

95.00%

'

82.50%

'

'

'

'

'

'

Warranty Period (duration)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'20 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum Liability Per Purchase Agreement for Damages

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

138

'

'

Notice of intent to sue, notice time period

'

'

'

'

'

'90 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loss Contingency, Damages Sought, Value

'

'

'

'

'

'

'

84

98

'

'

'

'

'

'

'

'

4,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loss Contingency Counter Claim Amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$41

'

'

Other_Investments_Amortized_Co

Other Investments (Amortized Cost and Fair Value of Nuclear Decommissioning Trusts) (Details) (Southern California Edison, USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Nuclear Decommissioning Trusts Disclosures	'	'
Total Investments, Amortized Cost	$2,979	$2,770
Total Investments, Fair Value	4,741	4,494
Stocks	'	'
Nuclear Decommissioning Trusts Disclosures	'	'
Longest Maturity Dates (in years)	'0	'
Total Investments, Amortized Cost	500	656
Total Investments, Fair Value	1,970	2,208
Municipal bonds	'	'
Nuclear Decommissioning Trusts Disclosures	'	'
Longest Maturity Dates (in years)	'2051	'
Total Investments, Amortized Cost	663	675
Total Investments, Fair Value	807	756
U.S. government and agency securities	'	'
Nuclear Decommissioning Trusts Disclosures	'	'
Longest Maturity Dates (in years)	'2045	'
Total Investments, Amortized Cost	826	902
Total Investments, Fair Value	888	947
Corporate bonds	'	'
Nuclear Decommissioning Trusts Disclosures	'	'
Longest Maturity Dates (in years)	'2057	'
Total Investments, Amortized Cost	333	208
Total Investments, Fair Value	385	241
Short-term investments and receivables/payables	'	'
Nuclear Decommissioning Trusts Disclosures	'	'
Longest Maturity Dates (in years)	'One-year	'
Total Investments, Amortized Cost	657	329
Total Investments, Fair Value	$691	$342

Other_Investments_Summary_of_C

Other Investments (Summary of Changes in Fair Value of the Nuclear Decommissioning Trusts) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
In Millions, unless otherwise specified			Southern California Edison	Southern California Edison	Southern California Edison	Southern California Edison
Summary Of Changes In The Fair Value [Roll Forward]	'	'	'	'	'	'
Balance at beginning of period	$4,741	$4,494	$4,740	$4,182	$4,494	$4,048
Gross realized gains	'	'	149	119	187	261
Gross realized losses	'	'	0	-17	0	-18
Unrealized gains (losses), net	'	'	-131	55	38	46
Other-than-temporary impairments	'	'	-4	-15	-10	-44
Interest, dividends, contributions and other	'	'	-13	8	32	39
Balance at end of period	$4,741	$4,494	$4,741	$4,332	$4,741	$4,332

Other_Investments_Textual_Deta

Other Investments (Textual) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Other Investments [Line Items]	'	'	'	'	'
Proceeds from sale of securities	'	'	$5,846,000,000	$4,574,000,000	'
Southern California Edison	'	'	'	'	'
Other Investments [Line Items]	'	'	'	'	'
Contributions received for decommissioning trusts	'	'	6,000,000	'	'
Proceeds from sale of securities	2,100,000,000	2,600,000,000	5,846,000,000	4,574,000,000	'
Unrealized holding gains, net of losses	1,800,000,000	'	1,800,000,000	'	1,700,000,000
Decommissioning Trust, Deferred Income Taxes	431,000,000	'	431,000,000	'	'
Nuclear decommissioning trusts	$4,300,000,000	'	$4,300,000,000	'	'

Regulatory_Assets_and_Liabilit2

Regulatory Assets and Liabilities (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Regulatory Assets	'	'
Regulatory Assets, Current	$1,170	$538
Regulatory Asset, Long-term	7,329	7,241
Regulatory Liabilities	'	'
Regulatory Liabilities, Current	794	767
Regulatory Liabilities, Long-term	6,387	4,995
Southern California Edison	'	'
Regulatory Assets	'	'
Regulatory Assets, Current	1,170	538
Regulatory Asset, Long-term	7,329	7,241
Total Regulatory Assets	8,499	7,779
Regulatory Liabilities	'	'
Regulatory Liabilities, Current	794	767
Regulatory Liabilities, Long-term	6,387	4,995
Total Regulatory Liabilities	7,181	5,762
Southern California Edison | Regulatory balancing accounts	'	'
Regulatory Assets	'	'
Regulatory Assets, Current	1,101	484
Regulatory Asset, Long-term	545	818
Southern California Edison | Energy derivatives	'	'
Regulatory Assets	'	'
Regulatory Assets, Current	64	54
Regulatory Asset, Long-term	721	816
Southern California Edison | Deferred income taxes, net	'	'
Regulatory Assets	'	'
Regulatory Asset, Long-term	3,361	2,957
Southern California Edison | Other	'	'
Regulatory Assets	'	'
Regulatory Asset, Long-term	329	402
Regulatory Liabilities	'	'
Regulatory Liabilities, Current	44	43
Regulatory Liabilities, Long-term	23	12
Southern California Edison | Pensions and other postretirement benefits	'	'
Regulatory Assets	'	'
Regulatory Asset, Long-term	506	369
Southern California Edison | Unamortized investments, net	'	'
Regulatory Assets	'	'
Regulatory Asset, Long-term	275	332
Southern California Edison | San Onofre (nuclear)	'	'
Regulatory Assets	'	'
Regulatory Assets, Current	5	0
Regulatory Asset, Long-term	1,386	1,325
Regulatory Liabilities	'	'
Regulatory Liabilities, Long-term	677	0
Southern California Edison | Unamortized loss on reacquired debt	'	'
Regulatory Assets	'	'
Regulatory Asset, Long-term	206	222
Southern California Edison | Regulatory balancing accounts	'	'
Regulatory Liabilities	'	'
Regulatory Liabilities, Current	750	724
Regulatory Liabilities, Long-term	1,085	1,132
Southern California Edison | Costs of Removal	'	'
Regulatory Liabilities	'	'
Regulatory Liabilities, Long-term	2,833	2,780
Southern California Edison | Asset Retirement Obligations	'	'
Regulatory Liabilities	'	'
Regulatory Liabilities, Long-term	$1,769	$1,071

Regulatory_Assets_and_Liabilit3

Regulatory Assets and Liabilities (Regulatory Balancing Accounts) (Details) (Southern California Edison, USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Regulatory balancing accounts | Energy resource recovery account	'	'
Regulatory Assets and Liabilities	'	'
Net liability	$1,570	$1,005
Regulatory balancing accounts | Four Corners memorandum account	'	'
Regulatory Assets and Liabilities	'	'
Net liability	6	145
Regulatory balancing accounts | New system generation balancing account	'	'
Regulatory Assets and Liabilities	'	'
Net liability	117	132
Refunds of excess revenue | Significant Components	'	'
Regulatory Assets and Liabilities	'	'
Net liability	-189	-554
Refunds of excess revenue | Public purpose programs and energy efficiency programs	'	'
Regulatory Assets and Liabilities	'	'
Net liability	-832	-1,037
Refunds of excess revenue | Base rate recovery balancing account	'	'
Regulatory Assets and Liabilities	'	'
Net liability	-243	-247
Refunds of excess revenue | Greenhouse gas auction revenue	'	'
Regulatory Assets and Liabilities	'	'
Net liability	-300	-385
Refunds of excess revenue | FERC formula rates and FERC balancing accounts	'	'
Regulatory Assets and Liabilities	'	'
Net liability	-89	-59
Refunds of excess revenue | FERC energy settlements	'	'
Regulatory Assets and Liabilities	'	'
Net liability	-195	0
Refunds of excess revenue | Other	'	'
Regulatory Assets and Liabilities	'	'
Net liability	($223)	($108)

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)

1 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

9 Months Ended

1 Months Ended

Jun. 30, 2010

Sep. 30, 2014

Feb. 28, 2014

Dec. 31, 2011

Jun. 30, 2010

Sep. 30, 2014

Sep. 30, 2013

Jun. 01, 2014

Feb. 28, 2014

Oct. 31, 2011

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Jun. 28, 2014

Jun. 28, 2014

Sep. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

San Gabriel Windstorm Investigation

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

Nuclear Insurance

Nuclear Insurance

Nuclear Insurance

Tort claims for onsite workers

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre (nuclear)

San Onofre and Palo Verde

Amount Returned To Customers [Member]

Amount Returned To Shareholders [Member]

site

site

Southern California Edison

Southern California Edison

Southern California Edison

SCE and other owners of San Onofre and Palo Verde

SCE and other owners of San Onofre and Palo Verde

Southern California Edison

Nuclear Insurance

Nuclear Insurance

Nuclear Insurance

Southern California Edison

Southern California Edison

plaintiff

Southern California Edison

SCE and other owners of San Onofre and Palo Verde

Schedule Of Commitments And Contingencies [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

San Bernardino settlement amount

'

'

'

'

'

'

'

'

$24,500,000

'

'

'

'

'

'

$427,000,000

$334,000,000

'

'

'

Litigation Settlement Penalties Paid to State

'

'

15,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of plaintiffs in Four Corners environmental matters

'

'

'

'

'

'

'

'

'

4

'

'

'

'

'

'

'

'

'

'

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

'

20

'

'

'

20

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Minimum costs to be Identified Site

'

'

'

'

'

1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Minimum liability for environmental remediation for material sites

'

110,000,000

'

'

'

110,000,000

'

'

'

'

'

'

'

'

72,000,000

'

'

'

'

'

Immaterial sites for environmental remediation (in number of sites)

'

'

'

'

'

38

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total minimum recorded liability for immaterial sites

'

3,000,000

'

'

'

3,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Environmental remediation liability

'

113,000,000

'

'

'

113,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Regulatory assets related to environmental remediation

'

109,000,000

'

'

'

109,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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

'

72,000,000

'

'

'

72,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Environmental remediation costs to be recovered (as a percent)

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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

'

'

'

'

'

159,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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

'

'

'

'

'

4,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Expected annual environmental remediation costs, high end of range

'

'

'

'

'

31,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Environmental remediation costs

'

'

'

'

'

3,000,000

5,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Federal limit on public liability claims from nuclear incident, approximate

'

'

'

'

'

'

'

'

'

'

13,600,000,000

'

'

'

'

'

'

'

'

'

Private primary insurance purchased

'

'

'

'

'

'

'

'

'

'

'

'

375,000,000

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, 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

'

450,000,000

'

'

'

450,000,000

'

547,500,000

'

'

'

'

'

'

'

'

'

'

'

'

Self insurance retention per wildfire occurrence

'

'

'

'

'

'

'

10,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Wildfire Threshold For Additional Coverage

'

550,000,000

'

'

'

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

'

$84,000,000

'

$98,000,000

'

'

'

'

'

'

'

'

'

'

$4,000,000,000

'

'

'

'

'

Preferred_and_Preference_Stock1

Preferred and Preference Stock of Utility (Details) (Southern California Edison, SCE Trust III, Series H Preferred Stock, USD $)	3 Months Ended
	Mar. 31, 2014	Sep. 30, 2014
Southern California Edison | SCE Trust III | 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	$2,500

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss (Details) (USD $)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Increase (Decrease) in Accumulated Other Comprehensive Loss	'		'		'		'
Beginning balance	'		'		($13)		'
Other	-1		0		1		0
Other comprehensive income (loss), net of tax	-10		3		-10		8
Ending Balance	-23		'		-23		'
Southern California Edison	'		'		'		'
Increase (Decrease) in Accumulated Other Comprehensive Loss	'		'		'		'
Beginning balance	'		'		-11		'
Other	-1		0		1		0
Other comprehensive income (loss), net of tax	0		2		3		1
Ending Balance	-8		'		-8		'
Accumulated Defined Benefit Plans Adjustment	'		'		'		'
Increase (Decrease) in Accumulated Other Comprehensive Loss	'		'		'		'
Beginning balance	-13		-82		-13		-87
Other comprehensive loss before reclassifications	-12		0		-17		-2
Reclassified from accumulated other comprehensive income	3	[1]	3	[1]	6	[1]	10	[1]
Other	-1		0		1		0
Other comprehensive income (loss), net of tax	-10		3		-10		8
Ending Balance	-23		-79		-23		-79
Accumulated Defined Benefit Plans Adjustment | Southern California Edison	'		'		'		'
Increase (Decrease) in Accumulated Other Comprehensive Loss	'		'		'		'
Beginning balance	-8		-30		-11		-29
Other comprehensive loss before reclassifications	0		0		0		-4
Reclassified from accumulated other comprehensive income	1	[1]	2	[1]	2	[1]	5	[1]
Other	-1		0		1		0
Other comprehensive income (loss), net of tax	0		2		3		1
Ending Balance	($8)		($28)		($8)		($28)
[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 Other Expenses (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Aug. 31, 2014

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Southern California Edison

Edison International Parent and Other

Edison International Parent and Other

Edison International Parent and Other

Edison International Parent and Other

State General Fund Member

FERC-Approved Settlement Agreements

FERC-Approved Settlement Agreements

FERC-Approved Settlement Agreements

FERC-Approved Settlement Agreements

Southern California Edison

agreements

San Bernardino and San Gabriel

Other Income And Expense [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gain Contingency, Claims Settled, Number

'

'

'

'

'

'

'

'

'

'

8

'

'

'

'

'

'

Litigation Settlement, Amount

'

'

'

'

'

'

'

'

($216)

'

'

'

'

'

'

'

'

Litigation Settlement, Amount Included in Other Income

'

'

'

'

'

'

'

'

1

0

15

0

'

'

'

'

'

Other income:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity allowance for funds used during construction

'

'

'

'

19

14

50

54

'

'

'

'

'

'

'

'

'

Increase in cash surrender value of life insurance policies

'

'

'

'

10

10

28

24

'

'

'

'

'

'

'

'

'

Interest income

'

'

'

'

1

2

6

8

'

'

'

'

'

'

'

'

'

Other

'

'

'

'

5

1

6

3

'

'

'

'

'

'

'

'

'

Total interest and other income

'

'

'

'

36

27

105

89

'

'

'

'

'

'

'

'

'

Other income

'

'

'

'

'

'

'

'

'

'

'

'

4

1

4

2

'

Interest and other income

40

28

109

91

36

27

105

89

'

'

'

'

'

'

'

'

'

Other expenses:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Penalties

'

'

'

'

15

0

15

0

'

'

'

'

'

'

'

'

'

Civic, political and related activities and donations

'

'

'

'

8

9

22

24

'

'

'

'

'

'

'

'

'

Other

'

'

'

'

6

6

15

14

'

'

'

'

'

'

'

'

'

Total other expenses

'

'

'

'

29

15

52

38

'

'

'

'

'

'

'

'

'

Other expenses

'

'

'

'

'

'

'

'

'

'

'

'

0

0

0

0

'

Total consolidated other expenses

29

15

52

38

29

15

52

38

'

'

'

'

'

'

'

'

'

Litigation Settlement, Amount Subject to Shareholder Incentive

'

'

'

'

'

'

'

'

15

'

'

'

'

'

'

'

'

Litigation Settlement Penalties Paid to State

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$15

Discontinued_Operations_Detail

Discontinued Operations (Details) (USD $)	9 Months Ended		1 Months Ended	9 Months Ended				3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Apr. 30, 2014	Sep. 30, 2014	Aug. 31, 2014	Apr. 01, 2014	Dec. 31, 2013	Sep. 30, 2014	Sep. 30, 2014
			Edison Mission Energy	Edison Mission Energy	Edison Mission Energy	Edison Mission Energy	Edison Mission Energy	Edison Mission Energy	Edison Mission Energy
				installment				Discontinued Operations	Discontinued Operations
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	'	'	'	'	'	$342	'	'	'
Percentage of Tax Benefits To Be Paid	'	'	'	50.00%	'	'	'	'	'
Tax Attributes Estimated Amount	'	'	'	'	'	'	1,191	'	'
Cash Portion of Settlement Payment	225	0	225	'	'	'	'	'	'
Tax Attributes	'	'	'	'	1,206	'	'	'	'
Number of Installments	'	'	'	2	'	'	'	'	'
Tax Attribute Including Interest, Installment One	'	'	'	204	'	'	'	'	'
Tax Attribute Including Interest Installment Two	'	'	'	214	'	'	'	'	'
Gain (Loss) Related to EME Settlement	'	'	'	'	'	'	'	($16)	$168

Supplemental_Cash_Flows_Inform2

Supplemental Cash Flows Information (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Cash payments (receipts) for interest and taxes:	'	'
Interest, net of amounts capitalized	$412	$431
Tax payments (refunds), net	190	27
Dividends declared but not paid:	'	'
Notes Issued	410	0
Common Stock	'	'
Dividends declared but not paid:	'	'
Dividends declared but not paid	116	110
Preferred Stock and Preference Stock	'	'
Dividends declared but not paid:	'	'
Dividends declared but not paid	4	4
Southern California Edison	'	'
Cash payments (receipts) for interest and taxes:	'	'
Interest, net of amounts capitalized	411	415
Tax payments (refunds), net	15	18
Dividends declared but not paid:	'	'
Notes Issued	0	0
Accrued capital expenditures	505	401
Southern California Edison | Common Stock	'	'
Dividends declared but not paid:	'	'
Dividends declared but not paid	126	120
Southern California Edison | Preferred Stock and Preference Stock	'	'
Dividends declared but not paid:	'	'
Dividends declared but not paid	$4	$4