Revenue (Summary) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Revenue
Total operating revenue	$ 4,702	$ 5,228	$ 12,632	$ 13,204
SCE
Revenue
Revenue from contracts with customers	5,841	5,953	13,166	13,313
Alternative revenue programs and other operating revenue	(1,154)	(736)	(580)	(139)
Total operating revenue	4,687	5,217	12,586	13,174
Receivables from contracts with customers	3,100		3,100		$ 2,300
Accrued unbilled revenues	929		929		$ 638
SCE | Earning Activities
Revenue
Revenue from contracts with customers	2,362	2,350	6,481	6,313
Alternative revenue programs and other operating revenue	25	100	306	568
Total operating revenue	2,387	2,450	6,787	6,881
SCE | Cost- Recovery Activities
Revenue
Revenue from contracts with customers	3,479	3,603	6,685	7,000
Alternative revenue programs and other operating revenue	(1,179)	(836)	(886)	(707)
Total operating revenue	$ 2,300	$ 2,767	$ 5,799	$ 6,293