Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net income	$ 114	$ 214
Pension and postretirement benefits other than pensions:
Amortization of net loss included in net income, net of income tax expense of $4 and $1 for 2012 and 2011, respectively	7	3
Unrealized gain (loss) on derivatives qualified as cash flow hedges:
Unrealized holding gain (loss) arising during the period, net of income tax expense (benefit) of $17 and $4 for 2012 and 2011, respectively	25	6
Reclassification adjustments included in net income, net of income tax benefit of $8 and $6 for 2012 and 2011, respectively	(11)	(10)
Other comprehensive income (loss)	21	(1)
Comprehensive income	135	213
Less: Comprehensive income attributable to noncontrolling interests	21	14
Comprehensive income attributable to Edison International	$ 114	$ 199