CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Current Assets
Cash and cash equivalents	$ 1,056		$ 888
Accounts receivable-trade	92		73
Receivables from affiliates	6		8
Inventory	121		175
Derivative assets	41		53
Restricted cash and cash equivalents	14		11
Margin and collateral deposits	89		61
Prepaid expenses and other	48		54
Total current assets	1,467		1,323
Investments in Unconsolidated Affiliates	522		534
Property, Plant and Equipment, less accumulated depreciation	4,465		4,516
Other Assets
Deferred financing costs	34		44
Long-term derivative assets	22		37
Restricted deposits	113		102
Rent payments in excess of levelized rent expense under plant operating leases	806		836
Other long-term assets	96		128
Total other assets	1,071		1,147
Total Assets	7,525		7,520
Current Liabilities
Accounts payable	20		29
Payables to affiliates	32		34
Accrued liabilities and other	115		67
Interest payable	2		1
Current portion of long-term debt	118		307
Short-term debt	0		382
Total current liabilities	287		820
Liabilities subject to compromise	3,981		3,959
Long-term debt net of current portion	1,404		749
Deferred taxes and tax credits, net (Note 7)	82		81
Deferred revenues	519		533
Long-term derivative liabilities	68		118
Other long-term liabilities	505		528
Total Liabilities	6,846		6,788
Commitments and Contingencies (Notes 5, 6, 9 and 10)
Equity
Common stock and membership interests	64		64
Additional paid-in capital	1,104		1,095
Retained deficit	(770)		(577)
Accumulated other comprehensive loss	(109)	[1]	(138)
Total Edison Mission Energy common shareholder's equity	289		444
Noncontrolling Interests	390		288
Total Equity	679		732
Total Liabilities and Equity	7,525		7,520
Midwest Generation LLC
Current Assets
Cash and cash equivalents	117		95
Receivables from affiliates	46		40
Inventory	104		165
Interest receivable from affiliate, net (Note 1)	0		0
Derivative assets	1		2
Prepaid expenses and other	22		20
Total current assets	290		322
Property, Plant and Equipment, less accumulated depreciation	2,034		2,078
Notes receivable from affiliate, net (Note 1)	0		0
Other Assets
Other long-term assets	10		28
Total Assets	2,334		2,428
Current Liabilities
Accounts payable	10		10
Payables to affiliates	11		3
Accrued liabilities and other	42		18
Derivative liabilities	5		3
Interest payable	12		1
Current portion of lease financings	0		6
Total current liabilities	80		41
Liabilities subject to compromise	545		529
Lease financings, net of current portion	0		2
Deferred taxes and tax credits, net (Note 7)	0		0
Other long-term liabilities	191		190
Total Liabilities	816		762
Commitments and Contingencies (Notes 5, 6, 9 and 10)
Equity
Common stock and membership interests	0		0
Additional paid-in capital	3,405		3,405
Retained deficit	(1,837)		(1,689)
Accumulated other comprehensive loss	(50)		(50)
Total Equity	1,518		1,666
Total Liabilities and Equity	$ 2,334		$ 2,428

[1] EME and Midwest Generation both expect to reclassify unrealized losses on cash flow hedges into earnings in the next 12 months. For further explanation, see "—Unrealized Losses on Cash Flow Hedges."