Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net income	$ 298	$ 112
Other comprehensive income (loss), net of tax:
Net loss arising during the period, net of income tax benefit	(2)	0
Amortization of net loss included in net income, net of income tax expense	2	7
Unrealized gain (loss) on derivatives qualified as cash flow hedges:
Unrealized holding gain arising during the period, net of income tax expense	0	25
Reclassification adjustments included in net income, net of income tax benefit	0	(11)
Other comprehensive income (loss), net of tax	0	21
Comprehensive income	298	133
Less: Comprehensive income attributable to noncontrolling interests	27	19
Comprehensive income attributable to Company	271	114
Southern California Edison
Net income	283	201
Other comprehensive income (loss), net of tax:
Net loss arising during the period, net of income tax benefit	(4)
Amortization of net loss included in net income, net of income tax expense	1	3
Unrealized gain (loss) on derivatives qualified as cash flow hedges:
Other comprehensive income (loss), net of tax	(3)	3
Comprehensive income	$ 280	$ 204