Consolidated Balance Sheets (USD $) In Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 945	$ 1,389
Receivables, less allowances of $87 and $85 for uncollectible accounts at respective dates	1,018	931
Accrued unbilled revenue	619	442
Inventory	589	568
Prepaid taxes	356	390
Derivative assets	117	133
Restricted cash	11	2
Margin and collateral deposits	65	65
Regulatory assets	469	378
Other current assets	148	124
Total current assets	4,337	4,422
Nuclear decommissioning trusts	3,657	3,480
Investments in unconsolidated affiliates	552	559
Other investments	231	223
Total investments	4,440	4,262
Utility property, plant and equipment, less accumulated depreciation of $6,486 and $6,319 at respective dates	25,847	24,778
Competitive power generation and other property, plant and equipment, less accumulated depreciation of $2,009 and $1,865 at respective dates	5,613	5,406
Total property, plant and equipment	31,460	30,184
Derivative assets	242	437
Restricted deposits	27	47
Rent payments in excess of levelized rent expense under plant operating leases	1,288	1,187
Regulatory assets	4,690	4,347
Other long-term assets	591	644
Total long-term assets	6,838	6,662
Total assets	47,075	45,530
LIABILITIES AND EQUITY
Short-term debt	388	115
Current portion of long-term debt	53	48
Accounts payable	1,110	1,362
Accrued taxes	33	52
Accrued interest	225	205
Customer deposits	208	217
Derivative liabilities	238	217
Regulatory liabilities	820	738
Other current liabilities	807	998
Total current liabilities	3,882	3,952
Long-term debt	12,956	12,371
Deferred income taxes	5,819	5,625
Deferred investment tax credits	132	122
Customer advances	121	112
Derivative liabilities	580	468
Pensions and benefits	2,306	2,260
Asset retirement obligations	2,616	2,561
Regulatory liabilities	4,759	4,524
Other deferred credits and other long-term liabilities	2,147	2,041
Total deferred credits and other liabilities	18,480	17,713
Total liabilities	35,318	34,036
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)	2,347	2,331
Accumulated other comprehensive loss	(97)	(76)
Retained earnings	8,476	8,328
Total Edison International's common shareholders' equity	10,726	10,583
Preferred and preference stock of utility	1,029	907
Other noncontrolling interests	2	4
Total noncontrolling interests	1,031	911
Total equity	11,757	11,494
Total liabilities and equity	$ 47,075	$ 45,530