CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net Income (Loss)	$ (32)	$ (17)	$ (52)	$ 64
Pension and postretirement benefits other than pensions
Amortization of net loss included in expenses, net of tax			1
Unrealized gains (losses) on derivatives qualified as cash flow hedges
Unrealized holding gains (losses) arising during period, net of income tax expense (benefit) of $(9) and $(50) for the three months and $(5) and $12 for the six months ended June 30, 2011 and 2010, respectively	(14)	(77)	(8)	18
Reclassification adjustments included in net income (loss), net of income tax benefit of $6 and $35 for the three months and $12 and $49 for the six months ended June 30, 2011 and 2010, respectively	(7)	(53)	(17)	(73)
Other comprehensive loss	(21)	(130)	(24)	(55)
Comprehensive Income (Loss)	(53)	(147)	(76)	9
Comprehensive Income Attributable to Noncontrolling Interests	0		0
Comprehensive Income (Loss) Attributable to Edison Mission Energy Common Shareholder	$ (53)	$ (147)	$ (76)	$ 9