Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Southern California Edison	Common Stock	Common Stock Southern California Edison	Additional Paid-in Capital Southern California Edison	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Southern California Edison	Retained Earnings	Retained Earnings Southern California Edison	Subtotal	Preferred and Preference Stock	Preferred and Preference Stock Southern California Edison
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	$ 1,759	$ 1,795
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,015	1,000	0	0	0	0	0	915	1,000	915	100	0
Other comprehensive income (loss), net of tax	74	18	0	0	0	74	18	0	0	74	0	0
Dividends declared on common stock	(446)	(486)	0	0	0	0	0	(446)	(486)	(446)	0	0
Dividends declared on preferred and preference stock		(100)		0	0		0		(100)			0
Dividends and distributions to noncontrolling interests and other	(100)		0			0		0		0	(100)
Stock-based compensation and other	(48)	(43)	5	0	1	0	0	(53)	(44)	(48)	0	0
Noncash stock-based compensation and other	18	19	25	0	15	0	0	(6)	4	19	(1)	0
Issuance of preference stock	387	387	0	0	(13)	0	0	0		0	387	400
Redemption of preference stock	(400)	(400)	0	0	8	0	0	(8)	(8)	(8)	(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	1,753	1,795
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,724	1,565	0	0	0	0		1,612	1,565	1,612	112
Other comprehensive income (loss), net of tax	(45)	(17)	0	0		(45)	(17)	0	0	(45)	0	0
Dividends declared on common stock	(483)	(525)	0	0	0	0	0	(483)	(525)	(483)	0	0
Dividends declared on preferred and preference stock		(112)		0	0		0		(112)			0
Dividends and distributions to noncontrolling interests and other	(112)		0			0		0		0	(112)
Stock-based compensation and other	(89)	(44)	15	0	20	0	0	(104)	(64)	(89)	0	0
Noncash stock-based compensation and other	27	8	27	0	12	0	0	0	(4)	27	0	0
Issuance of preference stock	269	269	0	0	(6)	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	2,022	2,070
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,133	1,111	0	0	0	0	0	1,020	1,111	1,020	113	0
Other comprehensive income (loss), net of tax	2	6	0	0	0	2	6	0	0	2	0	0
Dividends declared on common stock	(564)	(611)	0	0	0	0	0	(564)	(611)	(564)	0	0
Dividends declared on preferred and preference stock		(113)		0	0		0		(113)			0
Dividends and distributions to noncontrolling interests and other	(113)		0			0		0		0	(113)
Stock-based compensation and other	(70)	(10)	15	0	23	0	0	(85)	(33)	(70)	0	0
Noncash stock-based compensation and other	24	13	24	0	13	0	0	0	0	24	0	0
Issuance of preference stock	319	319	0	0	(6)	0	0	0	0	0	319	325
Redemption of preference stock	(325)	(325)	0	0	4	0	0	(4)	(4)	(4)	(321)	(325)
Balance, at the end of the period at Dec. 31, 2015	$ 13,388	$ 13,672	$ 2,484	$ 2,168	$ 652	$ (56)	$ (22)	$ 8,940	$ 8,804	$ 11,368	$ 2,020	$ 2,070