Consolidated Statements of Comprehensive Income (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net income	$ 191	$ 357	$ 405	$ 606
Pension and postretirement benefits other than pensions:
Net gain arising during the period, net of income tax expense of $2 for the six months ended June 30, 2010				12
Amortization of net (gain) loss included in net income, net of income tax expense (benefit) of $1 and $1 for the three months and $3 and $(4) for the six months ended June 30, 2011 and 2010, respectively	1	2	4	(6)
Prior service credit arising during the period, net of income tax expense of $1 for the six months ended June 30, 2010				2
Amortization of prior service credit, net of income tax benefit of $1 for the six months ended June 30, 2010				(2)
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 $(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, 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	(20)	(128)	(21)	(49)
Comprehensive income	171	229	384	557
Less: Comprehensive income attributable to noncontrolling interests	15	13	29	26
Comprehensive income attributable to Edison International	$ 156	$ 216	$ 355	$ 531