CONSOLIDATED BALANCE SHEETS (USD $) In Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Current Assets
Cash and cash equivalents	$ 833	$ 1,075
Accounts receivable-trade	137	170
Receivables from affiliates	225	192
Inventory	259	236
Derivative assets	39	46
Restricted cash	11	2
Margin and collateral deposits	50	59
Prepaid expenses and other	284	79
Total current assets	1,838	1,859
Investments in Unconsolidated Affiliates	550	557
Property, Plant and Equipment, less accumulated depreciation of $1,898 and $1,759 at respective dates	5,536	5,332
Other Assets
Deferred financing costs	52	54
Long-term derivative assets	63	70
Restricted deposits	25	44
Rent payments in excess of levelized rent expense under plant operating leases	1,288	1,187
Other long-term assets	141	218
Total other assets	1,569	1,573
Total Assets	9,493	9,321
Current Liabilities
Accounts payable	134	90
Payables to affiliates	15	18
Accrued liabilities	150	201
Derivative liabilities	6	6
Interest payable	31	31
Deferred taxes	38	34
Current portion of long-term debt	53	48
Short-term debt	109	96
Total current liabilities	536	524
Long-term debt net of current portion	4,484	4,342
Deferred taxes and tax credits	787	836
Deferred revenues	319	160
Long-term derivative liabilities	23	19
Other long-term liabilities	604	619
Total Liabilities	6,753	6,500
Commitments and Contingencies (Notes 5, 6, 9 and 10)
Equity
Common stock, par value $0.01 per share (10,000 shares authorized; 100 shares issued and outstanding at each date)	64	64
Additional paid-in capital	1,335	1,336
Retained earnings	1,393	1,448
Accumulated other comprehensive loss	(55)	(31)
Total Edison Mission Energy common shareholder's equity	2,737	2,817
Noncontrolling Interests	3	4
Total Equity	2,740	2,821
Total Liabilities and Equity	$ 9,493	$ 9,321