Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
Net income (loss)	$ (92)		$ 22	$ 1,308
Pension and postretirement benefits other than pensions:
Net gain (loss) arising during the period, net of income tax expense (benefit) of $32, $(14) and $(22) for the years ended December 31, 2012, 2011 and 2010, respectively (and $6, $2 and $6 for 2012, 2011 and 2010, respectively for SCE)	15		(21)	(23)
Amortization of net (gain) loss included in net income (loss), net of income tax expense (benefit) of $(2), $5 and $4 for the years ended December 31, 2012, 2011 and 2010, respectively (and $3, $2 and $2 for 2012, 2011 and 2010 respectively for SCE)	(2)		8	6
Prior service cost (credit) arising during the period, net of income tax expense (benefit) of $1 and $(4) for the years ended December 31, 2012 and 2010, respectively	2		0	(6)
Amortization of prior service cost (credit) included in net income (loss), net of income tax expense of $2 for the year ended December 31, 2012	3		0	(1)
Unrealized loss on derivatives qualified as cash flow hedges:
Unrealized holding gain (loss) arising during the period, net of income tax expense (benefit) of $(15), $(7) and $37 for the years ended December 31, 2012, 2011 and 2010, respectively	(21)		(12)	55
Reclassification adjustments included in net income (loss), net of income tax expense (benefit) of $37, $(25) and $(96) for the years ended December 31, 2012, 2011 and 2010, respectively	55		(38)	(144)
Other comprehensive income (loss)	52		(63)	(113)
Comprehensive income (loss)	(40)		(41)	1,195
Less: Comprehensive income attributable to noncontrolling interests	91		59	52
Comprehensive income attributable to Company	(131)		(100)	1,143
Southern California Edison
Net income (loss)	1,660	[1],[2]	1,144	1,092
Pension and postretirement benefits other than pensions:
Net gain (loss) arising during the period, net of income tax expense (benefit) of $32, $(14) and $(22) for the years ended December 31, 2012, 2011 and 2010, respectively (and $6, $2 and $6 for 2012, 2011 and 2010, respectively for SCE)	(9)		(3)	(9)
Amortization of net (gain) loss included in net income (loss), net of income tax expense (benefit) of $(2), $5 and $4 for the years ended December 31, 2012, 2011 and 2010, respectively (and $3, $2 and $2 for 2012, 2011 and 2010 respectively for SCE)	4		4	3
Unrealized loss on derivatives qualified as cash flow hedges:
Other comprehensive income (loss)	(5)		1	(6)
Comprehensive income (loss)	$ 1,655		$ 1,145	$ 1,086

[1] During the fourth quarter of 2012, SCE corrected errors, primarily related to deferred taxes, that resulted in a net earnings benefit of $33 million which were not considered material to the current and prior period consolidated financial statements.

[2] During the fourth quarter of 2012, SCE implemented the 2012 GRC Decision which resulted in an earnings impact of approximately $500 million.