Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 148	$ 170
Receivables, less allowances of $66 and $75 for uncollectible accounts at respective dates	815	762
Accrued unbilled revenue	741	550
Inventory	267	340
Prepaid taxes	27	22
Derivative assets	91	129
Margin and collateral deposits	8	8
Regulatory assets	803	572
Other current assets	122	119
Total current assets	3,022	2,672
Nuclear decommissioning trusts	4,181	4,048
Investments in unconsolidated affiliates	2	2
Other investments	194	184
Total investments	4,377	4,234
Utility property, plant and equipment, less accumulated depreciation of $7,578 and $7,424 at respective dates	29,301	30,200
Nonutility property, plant and equipment, less accumulated depreciation of $69 and $123 at respective dates ($63 and $117 for SCE)	75	73
Total property, plant and equipment	29,376	30,273
Derivative assets	73	85
Restricted deposits	4	4
Regulatory assets	7,494	6,422
Other long-term assets	681	704
Total long-term assets	8,252	7,215
Total assets	45,027	44,394
LIABILITIES AND EQUITY
Short-term debt	853	175
Current portion of long-term debt	800	0
Accounts payable	1,288	1,423
Accrued taxes	33	61
Accrued interest	199	176
Customer deposits	199	193
Derivative liabilities	140	126
Regulatory liabilities	493	536
Deferred income taxes	79	64
Other current liabilities	804	990
Total current liabilities	4,888	3,744
Long-term debt	8,830	9,231
Deferred income taxes	6,304	6,127
Deferred investment tax credits	102	104
Customer advances	134	149
Derivative liabilities	1,027	939
Pensions and benefits	2,234	2,614
Asset retirement obligations	3,322	2,782
Regulatory liabilities	4,836	5,214
Other deferred credits and other long-term liabilities	2,242	2,299
Total deferred credits and other liabilities	20,201	20,228
Total liabilities	33,919	33,203
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)	2,388	2,373
Accumulated other comprehensive loss	(82)	(87)
Retained earnings	7,049	7,146
Total common shareholders' equity	9,355	9,432
Preferred and preference stock of utility	1,753	1,759
Total noncontrolling interests	1,753	1,759
Total equity	11,108	11,191
Total liabilities and equity	45,027	44,394
Southern California Edison
ASSETS
Cash and cash equivalents	49	45
Receivables, less allowances of $66 and $75 for uncollectible accounts at respective dates	768	755
Accrued unbilled revenue	741	550
Inventory	267	340
Prepaid taxes	22	48
Derivative assets	91	129
Regulatory assets	803	572
Other current assets	129	123
Total current assets	2,870	2,562
Nuclear decommissioning trusts	4,181	4,048
Other investments	127	116
Total investments	4,308	4,164
Utility property, plant and equipment, less accumulated depreciation of $7,578 and $7,424 at respective dates	29,301	30,200
Nonutility property, plant and equipment, less accumulated depreciation of $69 and $123 at respective dates ($63 and $117 for SCE)	73	70
Total property, plant and equipment	29,374	30,270
Derivative assets	73	85
Regulatory assets	7,494	6,422
Other long-term assets	531	531
Total long-term assets	8,098	7,038
Total assets	44,650	44,034
LIABILITIES AND EQUITY
Short-term debt	828	175
Current portion of long-term debt	800
Accounts payable	1,264	1,297
Accrued taxes	36	72
Accrued interest	194	172
Customer deposits	199	193
Derivative liabilities	140	126
Regulatory liabilities	493	536
Deferred income taxes	79	81
Other current liabilities	663	861
Total current liabilities	4,696	3,513
Long-term debt	8,427	8,828
Deferred income taxes	6,819	6,669
Deferred investment tax credits	102	104
Customer advances	134	149
Derivative liabilities	1,027	939
Pensions and benefits	1,727	2,245
Asset retirement obligations	3,322	2,782
Regulatory liabilities	4,836	5,214
Other deferred credits and other long-term liabilities	1,928	1,848
Total deferred credits and other liabilities	19,895	19,950
Total liabilities	33,018	32,291
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	584	581
Accumulated other comprehensive loss	(30)	(29)
Retained earnings	7,115	7,228
Total common shareholders' equity	9,837	9,948
Preferred and preference stock of utility	1,795	1,795
Total equity	11,632	11,743
Total liabilities and equity	$ 44,650	$ 44,034