Consolidated Statements of Changes in Equity (USD $) In Millions, unless otherwise specified		Total	Southern California Edison		Common Stock	Common Stock Southern California Edison	Additional Paid-in Capital Southern California Edison	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Southern California Edison	Retained Earnings	Retained Earnings Southern California Edison	Subtotal	Other	Preferred and Preference Stock	Preferred and Preference Stock Southern California Edison
Balance, at the beginning of the period at Dec. 31, 2011		$ 11,086	$ 9,958		$ 2,360	$ 2,168	$ 596	$ (139)	$ (24)	$ 7,834	$ 6,173	$ 10,055	$ 2	$ 1,029	$ 1,045
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(92)	1,660		0	0	0	0	0	(183)	1,660	(183)	0	91	0
Other comprehensive income (loss), net of tax		52	(5)		0	0	0	52	(5)	0	0	52	0	0	0
Transfer of assets to Capistrano Wind Partners		(21)			(21)			0		0		(21)	0	0
Dividends declared on common stock		(428)	(469)		0	0	0	0	0	(428)	(469)	(428)	0	0	0
Dividends declared on preferred and preference stock			(91)			0	0		0		(91)				0
Dividends, distributions to noncontrolling interests and other		(93)			0			0		0		0	(2)	(91)
Stock-based compensation and other		(80)	(57)		(3)	0	(13)	0	0	(77)	(44)	(80)	0	0	0
Noncash stock-based compensation and other		38	18		37	0	18	0	0	1	0	38	0	0	0
Issuance of preference stock		804	804		0	0	(21)	0	0	0		0	0	804	825
Redemption of preference stock		(75)	(75)		0	0	1	0	0	(1)	(1)	(1)	0	(74)	(75)
Balance, at the end of the period at Dec. 31, 2012		11,191	11,743		2,373	2,168	581	(87)	(29)	7,146	7,228	9,432	0	1,759	1,795
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	[1]		283
Balance, at the end of the period at Mar. 31, 2013
Balance, at the beginning of the period at Dec. 31, 2012		11,191	11,743		2,373	2,168	581	(87)	(29)	7,146	7,228	9,432	0	1,759	1,795
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		1,015	1,000	[1]	0	0	0	0		915	1,000	915	0	100
Other comprehensive income (loss), net of tax		74	18		0	0		74	18	0	0	74	0	0	0
Dividends declared on common stock		(446)	(486)		0	0	0	0	0	(446)	(486)	(446)	0	0	0
Dividends declared on preferred and preference stock			(100)			0	0		0		(100)				0
Dividends, distributions to noncontrolling interests and other		(100)			0			0		0		0	0	(100)
Stock-based compensation and other		(48)	(43)		5	0	1	0	0	(53)	(44)	(48)	0	0	0
Noncash stock-based compensation and other		18	19		25	0	15	0	0	(6)	4	19	0	(1)	0
Issuance of preference stock		387	387		0	0	(13)	0	0	0	0	0	0	387	400
Redemption of preference stock		(400)	(400)		0	0	8	0	0	(8)	(8)	(8)	0	(392)	(400)
Balance, at the end of the period at Dec. 31, 2013		11,691	12,138		2,403	2,168	592	(13)	(11)	7,548	7,594	9,938	0	1,753	1,795
Balance, at the beginning of the period at Sep. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	[1]		283
Balance, at the end of the period at Dec. 31, 2013			12,138
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	[2]		234
Balance, at the end of the period at Mar. 31, 2014
Balance, at the beginning of the period at Dec. 31, 2013		11,691	12,138		2,403	2,168	592	(13)	(11)	7,548	7,594	9,938	0	1,753	1,795
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		1,724			0			0		1,612		1,612	0	112
Net income (loss)		1,721	1,565	[2]		0	0		0		1,565				0
Other comprehensive income (loss), net of tax		(45)	(17)		0	0	0	(45)	(17)	0	0	(45)	0	0	0
Dividends declared on common stock		(483)	(525)		0	0	0	0	0	(483)	(525)	(483)	0	0	0
Dividends declared on preferred and preference stock			(112)			0	0		0		(112)				0
Dividends, distributions to noncontrolling interests and other		(112)			0			0		0		0	0	(112)
Stock-based compensation and other		(89)	(44)		15	0	20	0	0	(104)	(64)	(89)	0	0	0
Noncash stock-based compensation and other		27	8		27	0	12	0	0	0	(4)	27	0	0	0
Issuance of preference stock		269	269		0	0	(6)	0	0	0	0	0	0	269	275
Balance, at the end of the period at Dec. 31, 2014		12,982	13,282		2,445	2,168	618	(58)	(28)	8,573	8,454	10,960	0	2,022	2,070
Balance, at the beginning of the period at Sep. 30, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	[2]		408
Balance, at the end of the period at Dec. 31, 2014			$ 13,282

[1] During the second quarter of 2013, SCE recorded an impairment charge of $575 million ($365 million after-tax) related to the permanent retirement of San Onofre Units 2 and 3

[2] In the first quarter of 2014, SCE recorded an impairment charge of $231 million ($96 million after-tax) in 2014. During the fourth quarter of 2014, SCE reduced its estimated impact of the San Onofre OII Settlement by $68 million ($24 million after-tax) consistent with the advice filing for reimbursement of recorded costs.