Income Taxes (Components of Income Tax Expense (Benefit) by Location) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:
Federal	$ (97)	$ 0	$ (279)
State	(9)	0	80
Total Current Income Tax Expense (Benefit)	(106)	0	(199)
Deferred:
Federal	317	132	727
State	31	135	40
Total Deferred Income Tax Expense (Benefit)	348	267	767
Total income tax expense from continuing operations	242	267	568
Discontinued operations	(36)	(549)	(853)
Total	206	(282)	(285)
Southern California Edison
Current:
Federal	(119)	0	(275)
State	(19)	50	91
Total Current Income Tax Expense (Benefit)	(138)	50	(184)
Deferred:
Federal	345	136	757
State	72	28	28
Total Deferred Income Tax Expense (Benefit)	417	164	785
Total income tax expense from continuing operations	279	214	601
Discontinued operations	0	0	0
Total	$ 279	$ 214	$ 601