Revenue (Summary) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Revenue
Total operating revenue	$ 5,201	$ 4,702	$ 13,615	$ 12,632
SCE
Revenue
Revenue from contracts with customers	6,563	5,841	14,434	13,166
Alternative Revenue Programs and Other Operating Revenue	(1,375)	(1,154)	(858)	(580)
Total operating revenue	5,188	4,687	13,576	12,586
Receivables from contracts with customers	3,800		3,800		$ 2,500
Accrued unbilled revenues	1,200		1,200		$ 741
SCE | Earning Activities
Revenue
Revenue from contracts with customers	2,512	2,362	6,858	6,481
Alternative Revenue Programs and Other Operating Revenue	94	25	804	306
Total operating revenue	2,606	2,387	7,662	6,787
SCE | Cost- Recovery Activities
Revenue
Revenue from contracts with customers	4,051	3,479	7,576	6,685
Alternative Revenue Programs and Other Operating Revenue	(1,469)	(1,179)	(1,662)	(886)
Total operating revenue	$ 2,582	$ 2,300	$ 5,914	$ 5,799