Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Common Stock, Including APIC	Preferred stock SCE	Preferred stock	Common Stock SCE	Additional Paid-in Capital SCE	Accumulated Other Comprehensive Loss Cumulative effect adjustment SCE	Accumulated Other Comprehensive Loss Cumulative effect adjustment	Accumulated Other Comprehensive Loss SCE	Accumulated Other Comprehensive Loss	Retained Earnings Cumulative effect adjustment SCE	Retained Earnings Cumulative effect adjustment	Retained Earnings SCE	Retained Earnings	Equity Attributable to Common Shareholders	Noncontrolling Interest	SCE	Total
Beginning balance at Dec. 31, 2018	$ 2,545	$ 2,245		$ 2,168	$ 680	$ 5	$ (10)	$ (23)	$ (50)	$ (5)	$ 10	$ 8,715	$ 7,964	$ 10,459	$ 2,193	$ 13,785	$ 12,652
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income												1,530	1,284	1,284	121	1,530	1,405
Other comprehensive income (loss)								(11)	(9)					(9)		(11)	(9)
Capital contribution from Edison International Parent					3,250											3,250
Common stock issued, net of issuance cost	2,421													2,421			2,421
Common stock dividends declared												(600)	(849)	(849)		(600)	(849)
Preferred stock dividend accrued												(121)				(121)
Dividends to noncontrolling interests															(121)		(121)
Stock-based compensation					(3)							(15)	(27)	(27)		(18)	(27)
Noncash stock-based compensation	24				12									24		12	24
Ending balance at Dec. 31, 2019	4,990	2,245		2,168	3,939			(39)	(69)			9,514	8,382	13,303	2,193	17,827	15,496
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income												942	739	739	132	942	871
Other comprehensive income (loss)								(2)								(2)
Capital contribution from Edison International Parent					1,432											1,432
Common stock issued, net of issuance cost	942													942			942
Common stock dividends declared												(1,132)	(965)	(965)		(1,132)	(965)
Preferred stock dividend accrued																(132)
Dividends declared on preferred and preference stock												(117)				(117)
Dividends to noncontrolling interests															(117)		(117)
Stock-based compensation					(5)											(5)
Noncash stock-based compensation	30				14							(1)	(1)	29	1	13	30
Redemption of preferred and preference stock		(300)			7							(15)			(308)	(308)	(308)
Ending balance at Dec. 31, 2020	5,962	1,945		2,168	5,387			(41)	(69)			9,191	8,155	14,048	1,901	18,650	15,949
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income												935	819	819	106	935	925
Other comprehensive income (loss)								9	15					15		9	15
Capital contribution from Edison International Parent					1,633											1,633
Common stock issued, net of issuance cost	71													71			71
Preferred stock issued, net of issuance cost			$ 1,977											1,977			1,977
Common stock dividends declared												(1,300)	(1,021)	(1,021)		(1,300)	(1,021)
Preferred stock dividend accrued												(106)	(60)	(60)		(106)	(60)
Dividends to noncontrolling interests															(106)		(106)
Stock-based compensation					(7)											(7)
Noncash stock-based compensation	38				20							1	1	39		21	39
Ending balance at Dec. 31, 2021	$ 6,071	$ 1,945	$ 1,977	$ 2,168	$ 7,033			$ (32)	$ (54)			$ 8,721	$ 7,894	$ 15,888	$ 1,901	$ 19,835	$ 17,789