Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net gain (loss) arising during the period, tax	$ 13	$ 30	$ (9)
Net prior service cost (credit) arising during the period, tax	0	3	0
Unrealized holding gain (loss) arising during the period, tax	0	15	7
Reclassification adjustments included in net income (loss), tax	0	37	(25)
Comprehensive Income Other Adjustment, Tax	1
Southern California Edison
Net gain (loss) arising during the period, tax	9	(3)	1
Comprehensive Income Other Adjustment, Tax	$ 1