Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
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