Consolidated Statements of Changes in Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Increase (decrease) in Stockholders' Equity
Beginning balance	$ 17,868	$ 17,615	$ 17,944	$ 17,694	$ 17,549	$ 17,522	$ 17,944	$ 17,522
Net income	577	509	52	212	409	365	1,138	986
Other comprehensive income	2	1			1	2	3	3
Common stock issued	64	86	11	19	35	15
Preference stock issued, net of issuance cost		345
Common stock dividends declared	(302)	(301)	(300)	(283)	(283)	(282)
Preferred stock dividend declared	(44)		(44)	(53)		(52)
Dividends to noncontrolling interests	(72)	(43)	(41)	(30)	(29)	(29)
Noncash stock-based compensation	14	15	12	12	12	8
Preferred stock repurchased		(9)	(19)
Preference stock redeemed		(350)
Ending Balance	$ 18,107	$ 17,868	$ 17,615	$ 17,571	$ 17,694	$ 17,549	18,107	17,571
Dividends declared per common share (in dollars per share)	$ 0.78	$ 0.78	$ 0.78	$ 0.7375	$ 0.7375	$ 0.7375
Series A
Increase (decrease) in Stockholders' Equity
Preferred stock dividends (in dollars per share)	26.875		26.875	26.875		26.875
Series B
Increase (decrease) in Stockholders' Equity
Preferred stock dividends (in dollars per share)	$ 25.00		$ 25.00	$ 25.00		$ 25.00
Equity Attributable to Common Shareholders
Increase (decrease) in Stockholders' Equity
Beginning balance	$ 15,424	$ 15,172	$ 15,501	$ 15,793	$ 15,648	$ 15,621	15,501	15,621
Net income	538	460	11	182	380	336
Other comprehensive income	2	1			1	2
Common stock issued	64	86	11	19	35	15
Common stock dividends declared	(302)	(301)	(300)	(283)	(283)	(282)
Preferred stock dividend declared	(44)		(44)	(53)		(52)
Dividends to noncontrolling interests	(33)
Noncash stock-based compensation	14	15	12	12	12	8
Preferred stock repurchased		(9)	(19)
Ending Balance	15,663	15,424	15,172	15,670	15,793	15,648	15,663	15,670
Preferred stock
Increase (decrease) in Stockholders' Equity
Beginning balance	1,645	1,654	1,673	1,978	1,978	1,978	1,673	1,978
Preferred stock repurchased		(9)	(19)
Ending Balance	1,645	1,645	1,654	1,978	1,978	1,978	1,645	1,978
Common Stock, Including APIC
Increase (decrease) in Stockholders' Equity
Beginning balance	6,461	6,361	6,338	6,270	6,223	6,200	6,338	6,200
Common stock issued	64	86	11	19	35	15
Noncash stock-based compensation	13	14	12	12	12	8
Ending Balance	6,538	6,461	6,361	6,301	6,270	6,223	6,538	6,301
Accumulated Other Comprehensive Loss
Increase (decrease) in Stockholders' Equity
Beginning balance	(8)	(9)	(9)	(8)	(9)	(11)	(9)	(11)
Other comprehensive income	2	1			1	2
Ending Balance	(6)	(8)	(9)	(8)	(8)	(9)	(6)	(8)
Retained Earnings
Increase (decrease) in Stockholders' Equity
Beginning balance	7,326	7,166	7,499	7,553	7,456	7,454	7,499	7,454
Net income	538	460	11	182	380	336
Common stock dividends declared	(302)	(301)	(300)	(283)	(283)	(282)
Preferred stock dividend declared	(44)		(44)	(53)		(52)
Dividends to noncontrolling interests	(33)
Noncash stock-based compensation	1	1
Ending Balance	7,486	7,326	7,166	7,399	7,553	7,456	7,486	7,399
Noncontrolling Interest
Increase (decrease) in Stockholders' Equity
Beginning balance	2,444	2,443	2,443	1,901	1,901	1,901	2,443	1,901
Net income	39	49	41	30	29	29
Preference stock issued, net of issuance cost		345
Dividends to noncontrolling interests	(39)	(43)	(41)	(30)	(29)	(29)
Preference stock redeemed		(350)
Ending Balance	2,444	2,444	2,443	1,901	1,901	1,901	2,444	1,901
SCE
Increase (decrease) in Stockholders' Equity
Beginning balance	21,262	21,097	21,404	20,881	20,807	20,789	21,404	20,789
Net income	641	572	106	269	449	399	1,319	1,117
Other comprehensive income	1		1				2
Preference stock issued, net of issuance cost		345
Common stock dividends declared	(360)	(360)	(360)	(350)	(350)	(350)
Preferred stock dividend declared	(72)	(43)	(41)	(30)	(29)	(29)
Stock-based compensation	(7)	(6)	(20)	(1)	(3)	(8)
Noncash stock-based compensation	9	7	7	6	7	6
Preference stock redeemed		(350)
Ending Balance	$ 21,474	$ 21,262	$ 21,097	$ 20,775	$ 20,881	$ 20,807	21,474	20,775
Dividends declared per common share (in dollars per share)	$ 0.8278	$ 0.8278	$ 0.8278	$ 0.8048	$ 0.8048	$ 0.8048
SCE | Minimum
Increase (decrease) in Stockholders' Equity
Preferred stock dividends (in dollars per share)	31.25	17.927	24.418	25.1276	24.273	22.281
SCE | Maximum
Increase (decrease) in Stockholders' Equity
Preferred stock dividends (in dollars per share)	$ 51.8084	$ 54.8223	$ 58.854	$ 35.937	$ 35.937	$ 35.937
SCE | Preferred stock
Increase (decrease) in Stockholders' Equity
Beginning balance	$ 2,495	$ 2,495	$ 2,495	$ 1,945	$ 1,945	$ 1,945	2,495	1,945
Preference stock issued, net of issuance cost		350
Preference stock redeemed		(350)
Ending Balance	2,495	2,495	2,495	1,945	1,945	1,945	2,495	1,945
SCE | Common stock
Increase (decrease) in Stockholders' Equity
Beginning balance	2,168	2,168	2,168	2,168	2,168	2,168	2,168	2,168
Ending Balance	2,168	2,168	2,168	2,168	2,168	2,168	2,168	2,168
SCE | Additional Paid-in Capital
Increase (decrease) in Stockholders' Equity
Beginning balance	8,435	8,433	8,446	8,442	8,438	8,441	8,446	8,441
Preference stock issued, net of issuance cost		(5)
Stock-based compensation	(7)	(6)	(20)	(1)	(3)	(8)
Noncash stock-based compensation	8	7	7	6	7	5
Preference stock redeemed		6
Ending Balance	8,436	8,435	8,433	8,447	8,442	8,438	8,436	8,447
SCE | Accumulated Other Comprehensive Loss
Increase (decrease) in Stockholders' Equity
Beginning balance	(11)	(11)	(12)	(8)	(8)	(8)	(12)	(8)
Other comprehensive income	1		1
Ending Balance	(10)	(11)	(11)	(8)	(8)	(8)	(10)	(8)
SCE | Retained Earnings
Increase (decrease) in Stockholders' Equity
Beginning balance	8,175	8,012	8,307	8,334	8,264	8,243	8,307	8,243
Net income	641	572	106	269	449	399
Common stock dividends declared	(360)	(360)	(360)	(350)	(350)	(350)
Preferred stock dividend declared	(72)	(43)	(41)	(30)	(29)	(29)
Noncash stock-based compensation	1					1
Preference stock redeemed		(6)
Ending Balance	$ 8,385	$ 8,175	$ 8,012	$ 8,223	$ 8,334	$ 8,264	$ 8,385	$ 8,223