Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Southern California Edison Company	Common Stock	Common Stock Southern California Edison Company	Additional Paid-in Capital Southern California Edison Company	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Southern California Edison Company	Retained Earnings	Retained Earnings Southern California Edison Company	Subtotal	Preferred and Preference Stock	Preferred and Preference Stock Southern California Edison Company
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	$ 1,753	$ 1,795
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,724	1,565						1,612	1,565	1,612	112
Other comprehensive income (loss)	(45)	(17)				(45)	(17)			(45)
Dividends declared on common stock	(483)	(525)						(483)	(525)	(483)
Dividends declared on preferred and preference stock		(112)							(112)
Dividends and distributions to noncontrolling interests and other	(112)										(112)
Stock-based compensation and other	(89)	(44)	15		20			(104)	(64)	(89)
Noncash stock-based compensation and other	27	8	27		12				(4)	27
Issuance of preference stock	269	269			(6)						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						1,020	1,111	1,020	113
Other comprehensive income (loss)	2	6				2	6			2
Dividends declared on common stock	(564)	(611)						(564)	(611)	(564)
Dividends declared on preferred and preference stock		(113)							(113)
Dividends and distributions to noncontrolling interests and other	(113)										(113)
Stock-based compensation and other	(70)	(10)	15		23			(85)	(33)	(70)
Noncash stock-based compensation and other	24	13	24		13					24
Issuance of preference stock	319	319			(6)						319	325
Redemption of preference stock	(325)	(325)			4			(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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,434	1,499						1,311	1,499	1,311	123
Other comprehensive income (loss)	3	2				3	2			3
Dividends declared on common stock	(646)	(701)						(646)	(701)	(646)
Dividends declared on preferred and preference stock		(123)							(123)
Dividends and distributions to noncontrolling interests and other	(123)										(123)
Stock-based compensation and other	(60)	(44)	(1)					(59)	(44)	(60)
Noncash stock-based compensation and other	22	9	22		9					22
Issuance of preference stock	294	294			(6)						294	300
Redemption of preference stock	(125)	(125)			2			(2)	(2)	(2)	(123)	(125)
Balance, at the end of the period at Dec. 31, 2016	$ 14,187	$ 14,483	$ 2,505	$ 2,168	$ 657	$ (53)	$ (20)	$ 9,544	$ 9,433	$ 11,996	$ 2,191	$ 2,245