Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 1,483	$ 1,469
Receivables, less allowances of $76 and $75 for uncollectible accounts at respective dates	753	908
Accrued unbilled revenue	508	519
Inventory	579	624
Prepaid taxes	121	88
Derivative assets	90	106
Restricted cash and cash equivalents	187	103
Margin and collateral deposits	96	58
Regulatory assets	692	494
Other current assets	206	115
Total current assets	4,715	4,484
Nuclear decommissioning trusts	3,853	3,592
Investments in unconsolidated affiliates	522	525
Other investments	221	211
Total investments	4,596	4,328
Utility property, plant and equipment, less accumulated depreciation of $7,088 and $6,894 at respective dates	28,133	27,569
Competitive power generation and other property, plant and equipment, less accumulated depreciation of $1,478 and $1,408 at respective dates	4,547	4,547
Total property, plant and equipment	32,680	32,116
Derivative assets	117	128
Restricted deposits	60	51
Rent payments in excess of levelized rent expense under plant operating leases	798	760
Regulatory assets	5,713	5,466
Other long-term assets	705	706
Total long-term assets	7,393	7,111
Total assets	49,384	48,039
LIABILITIES AND EQUITY
Short-term debt	343	429
Current portion of long-term debt	61	57
Accounts payable	1,067	1,419
Accrued taxes	112	52
Accrued interest	229	205
Customer deposits	195	199
Derivative liabilities	255	268
Regulatory liabilities	645	670
Other current liabilities	768	1,049
Total current liabilities	3,675	4,348
Long-term debt	14,131	13,689
Deferred income taxes	5,686	5,396
Deferred investment tax credits	88	89
Customer advances	141	138
Derivative liabilities	803	547
Pensions and benefits	2,882	2,912
Asset retirement obligations	2,730	2,688
Regulatory liabilities	5,103	4,670
Other deferred credits and other long-term liabilities	2,538	2,476
Total deferred credits and other liabilities	19,971	18,916
Total liabilities	37,777	36,953
Commitments and contingencies (Note 9)
Common stock, no par value (800,000,000 shares authorized; 325,811,206 shares issued and outstanding at each date)	2,325	2,360
Accumulated other comprehensive loss	(118)	(139)
Retained earnings	7,783	7,834
Total Edison International's common shareholders' equity	9,990	10,055
Preferred and preference stock of utility	1,374	1,029
Other noncontrolling interests	243	2
Total noncontrolling interests	1,617	1,031
Total equity	11,607	11,086
Total liabilities and equity	$ 49,384	$ 48,039