Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Assets [Abstract]
Cash and cash equivalents	$ 190	$ 146
Receivables, less allowances of $67 and $66 for uncollectible accounts at respective dates	1,034	838
Accrued unbilled revenue	870	596
Inventory	277	256
Derivative assets	93	122
Regulatory assets	1,265	538
Deferred income taxes	389	421
Other current assets	433	395
Total current assets	4,551	3,312
Nuclear decommissioning trusts	4,740	4,494
Other investments	202	207
Total investments	4,942	4,701
Utility property, plant and equipment, less accumulated depreciation of $7,774 and $7,493 at respective dates	31,287	30,379
Nonutility property, plant and equipment, less accumulated depreciation of $77 and $74 at respective dates (Edison International) and $72 and $70 (Southern California Edison)	77	76
Total property, plant and equipment	31,364	30,455
Derivative assets	217	251
Regulatory assets	7,345	7,241
Other long-term assets	445	686
Total long-term assets	8,007	8,178
Total assets	48,864	46,646
LIABILITIES AND EQUITY
Short-term debt	1,253	209
Current portion of long-term debt	900	601
Accounts payable	1,306	1,407
Accrued taxes	127	358
Customer deposits	209	201
Derivative liabilities	144	152
Regulatory liabilities	826	767
Other current liabilities	1,008	1,186
Total current liabilities	5,773	4,881
Long-term debt	9,926	9,825
Deferred income taxes and credits	6,709	7,346
Derivative liabilities	1,051	1,042
Pensions and benefits	1,327	1,378
Asset retirement obligations	2,919	3,418
Regulatory liabilities	6,234	4,995
Other deferred credits and other long-term liabilities	2,522	2,070
Total deferred credits and other liabilities	20,762	20,249
Total liabilities	36,461	34,955
Commitments and contingencies
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)	2,434	2,403
Accumulated other comprehensive loss	(13)	(13)
Retained earnings	7,960	7,548
Total Edison International's common shareholders' equity	10,381	9,938
Preferred and preference stock of utility	2,022	1,753
Total noncontrolling interests	2,022	1,753
Total equity	12,403	11,691
Total liabilities and equity	48,864	46,646
Southern California Edison
Assets [Abstract]
Cash and cash equivalents	71	54
Receivables, less allowances of $67 and $66 for uncollectible accounts at respective dates	1,004	813
Accrued unbilled revenue	870	596
Inventory	259	256
Derivative assets	93	122
Regulatory assets	1,265	538
Deferred income taxes	84	303
Other current assets	452	393
Total current assets	4,098	3,075
Nuclear decommissioning trusts	4,740	4,494
Other investments	150	140
Total investments	4,890	4,634
Utility property, plant and equipment, less accumulated depreciation of $7,774 and $7,493 at respective dates	31,287	30,379
Nonutility property, plant and equipment, less accumulated depreciation of $77 and $74 at respective dates (Edison International) and $72 and $70 (Southern California Edison)	70	72
Total property, plant and equipment	31,357	30,451
Derivative assets	217	251
Regulatory assets	7,345	7,241
Other long-term assets	398	398
Total long-term assets	7,960	7,890
Total assets	48,305	46,050
LIABILITIES AND EQUITY
Short-term debt	587	175
Current portion of long-term debt	900	600
Accounts payable	1,286	1,373
Customer deposits	209	201
Derivative liabilities	144	152
Regulatory liabilities	826	767
Deferred income taxes	68	39
Other current liabilities	1,033	1,091
Total current liabilities	5,053	4,398
Long-term debt	9,523	9,422
Deferred income taxes and credits	8,026	7,841
Derivative liabilities	1,051	1,042
Pensions and benefits	897	951
Asset retirement obligations	2,919	3,418
Regulatory liabilities	6,234	4,995
Other deferred credits and other long-term liabilities	1,902	1,845
Total deferred credits and other liabilities	21,029	20,092
Total liabilities	35,605	33,912
Commitments and contingencies
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	603	592
Accumulated other comprehensive loss	(8)	(11)
Retained earnings	7,867	7,594
Total Edison International's common shareholders' equity	10,630	10,343
Preferred and preference stock of utility	2,070	1,795
Total equity	12,700	12,138
Total liabilities and equity	$ 48,305	$ 46,050