Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 1,175	$ 1,469
Receivables, less allowances of $74 and $75 for uncollectible accounts at respective dates	864	908
Accrued unbilled revenue	726	519
Inventory	567	624
Prepaid taxes	91	88
Derivative assets	91	106
Restricted cash and cash equivalents	110	103
Margin and collateral deposits	84	58
Regulatory assets	583	494
Other current assets	147	115
Total current assets	4,438	4,484
Nuclear decommissioning trusts	3,810	3,592
Investments in unconsolidated affiliates	530	525
Other investments	220	211
Total investments	4,560	4,328
Utility property, plant and equipment, less accumulated depreciation of $7,153 and $6,894 at respective dates	28,708	27,569
Competitive power generation and other property, plant and equipment, less accumulated depreciation of $1,548 and $1,408 at respective dates	4,535	4,547
Total property, plant and equipment	33,243	32,116
Derivative assets	111	128
Restricted deposits	97	51
Rent payments in excess of levelized rent expense under plant operating leases	798	760
Regulatory assets	5,424	5,466
Other long-term assets	717	706
Total long-term assets	7,147	7,111
Total assets	49,388	48,039
LIABILITIES AND EQUITY
Short-term debt	327	429
Current portion of long-term debt	565	57
Accounts payable	1,140	1,419
Accrued taxes	32	52
Accrued interest	227	205
Customer deposits	195	199
Derivative liabilities	170	268
Regulatory liabilities	721	670
Other current liabilities	846	1,049
Total current liabilities	4,223	4,348
Long-term debt	13,658	13,689
Deferred income taxes	5,465	5,396
Deferred investment tax credits	86	89
Customer advances	150	138
Derivative liabilities	558	547
Pensions and benefits	2,854	2,912
Asset retirement obligations	2,771	2,688
Regulatory liabilities	5,038	4,670
Other deferred credits and other long-term liabilities	2,640	2,476
Total deferred credits and other liabilities	19,562	18,916
Total liabilities	37,443	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)	2,371	2,360
Accumulated other comprehensive loss	(156)	(139)
Retained earnings	7,730	7,834
Total Edison International's common shareholders' equity	9,945	10,055
Preferred and preference stock of utility	1,760	1,029
Other noncontrolling interests	240	2
Total noncontrolling interests	2,000	1,031
Total equity	11,945	11,086
Total liabilities and equity	$ 49,388	$ 48,039