Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 610	$ 170
Receivables, less allowances of $72 and $75 for uncollectible accounts at respective dates	1,174	762
Accrued unbilled revenue	798	550
Inventory	272	340
Prepaid taxes	27	22
Derivative assets	47	129
Margin and collateral deposits	14	8
Regulatory assets	506	572
Other current assets	155	119
Total current assets	3,603	2,672
Nuclear decommissioning trusts	4,332	4,048
Other investments	201	186
Total investments	4,533	4,234
Utility property, plant and equipment, less accumulated depreciation of $7,817 and $7,424 at respective dates	29,734	30,200
Nonutility property, plant and equipment, less accumulated depreciation of $74 and $123 at respective dates ($68 and $117 for SCE)	75	73
Total property, plant and equipment	29,809	30,273
Derivative assets	207	85
Restricted deposits	4	4
Regulatory assets	8,015	6,422
Other long-term assets	527	704
Total long-term assets	8,753	7,215
Total assets	46,698	44,394
LIABILITIES AND EQUITY
Short-term debt	1,528	175
Current portion of long-term debt	401	0
Accounts payable	1,240	1,423
Accrued taxes	103	61
Accrued interest	102	176
Customer deposits	199	193
Derivative liabilities	174	126
Regulatory liabilities	629	536
Deferred income taxes	159	64
Other current liabilities	854	990
Total current liabilities	5,389	3,744
Long-term debt	9,232	9,231
Deferred income taxes	6,546	6,127
Deferred investment tax credits	106	104
Customer advances	132	149
Derivative liabilities	1,137	939
Pensions and benefits	2,237	2,614
Asset retirement obligations	3,371	2,782
Regulatory liabilities	4,989	5,214
Other deferred credits and other long-term liabilities	2,117	2,299
Total deferred credits and other liabilities	20,635	20,228
Total liabilities	35,256	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)	2,397	2,373
Accumulated other comprehensive loss	(79)	(87)
Retained earnings	7,371	7,146
Total common shareholders' equity	9,689	9,432
Preferred and preference stock of utility	1,753	1,759
Total noncontrolling interests	1,753	1,759
Total equity	11,442	11,191
Total liabilities and equity	46,698	44,394
Southern California Edison
ASSETS
Cash and cash equivalents	522	45
Receivables, less allowances of $72 and $75 for uncollectible accounts at respective dates	1,127	755
Accrued unbilled revenue	798	550
Inventory	272	340
Prepaid taxes	22	48
Derivative assets	47	129
Regulatory assets	506	572
Other current assets	167	123
Total current assets	3,461	2,562
Nuclear decommissioning trusts	4,332	4,048
Other investments	130	116
Total investments	4,462	4,164
Utility property, plant and equipment, less accumulated depreciation of $7,817 and $7,424 at respective dates	29,734	30,200
Nonutility property, plant and equipment, less accumulated depreciation of $74 and $123 at respective dates ($68 and $117 for SCE)	70	70
Total property, plant and equipment	29,804	30,270
Derivative assets	207	85
Regulatory assets	8,015	6,422
Other long-term assets	372	531
Total long-term assets	8,594	7,038
Total assets	46,321	44,034
LIABILITIES AND EQUITY
Short-term debt	1,354	175
Current portion of long-term debt	400
Accounts payable	1,228	1,297
Accrued taxes	148	72
Accrued interest	101	172
Customer deposits	199	193
Derivative liabilities	174	126
Regulatory liabilities	629	536
Deferred income taxes	159	81
Other current liabilities	842	861
Total current liabilities	5,234	3,513
Long-term debt	8,828	8,828
Deferred income taxes	7,033	6,669
Deferred investment tax credits	106	104
Customer advances	132	149
Derivative liabilities	1,137	939
Pensions and benefits	1,726	2,245
Asset retirement obligations	3,371	2,782
Regulatory liabilities	4,989	5,214
Other deferred credits and other long-term liabilities	1,774	1,848
Total deferred credits and other liabilities	20,268	19,950
Total liabilities	34,330	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	589	581
Accumulated other comprehensive loss	(28)	(29)
Retained earnings	7,467	7,228
Total common shareholders' equity	10,196	9,948
Preferred and preference stock of utility	1,795	1,795
Total equity	11,991	11,743
Total liabilities and equity	$ 46,321	$ 44,034