Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income	$ 103	$ 191	$ 215	$ 405
Pension and postretirement benefits other than pensions:
Net loss arising during the period, net of income tax benefit of $2 for both the three and six months ended 2012	(4)	0	(3)	0
Amortization of net loss included in net income, net of income tax expense of $1 and $1 for the three months and $5 and $3 for the six months ended June 30, 2012 and 2011, respectively	3	1	9	4
Unrealized loss on derivatives qualified as cash flow hedges:
Unrealized holding loss arising during the period, net of income tax benefit of $19 and $9 for the three months and $2 and $5 for the six months ended June 30, 2012 and 2011, respectively	(28)	(14)	(3)	(8)
Reclassification adjustments included in net income, net of income tax benefit of $6 and $6 for the three months and $13 and $12 for the six months ended June 30, 2012 and 2011, respectively	(9)	(7)	(20)	(17)
Other comprehensive loss	(38)	(20)	(17)	(21)
Comprehensive income	65	171	198	384
Less: Comprehensive income attributable to noncontrolling interests	29	15	48	29
Comprehensive income attributable to Edison International	$ 36	$ 156	$ 150	$ 355