Revenue (Summary) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue
Total operating revenue	$ 16,338	$ 17,220	$ 14,905
SCE
Revenue
Revenue from contracts with customers	17,020	16,760	14,347
Alternative revenue programs and other operating revenue	(745)	412	527
Total operating revenue	16,275	17,172	14,874
Receivables from contracts with customers	2,500	2,300
Accrued unbilled revenues	741	638
SCE | Earning Activities
Revenue
Revenue from contracts with customers	8,598	8,327	7,523
Alternative revenue programs and other operating revenue	414	681	349
Total operating revenue	9,012	9,008	7,872
SCE | Cost- Recovery Activities
Revenue
Revenue from contracts with customers	8,422	8,433	6,824
Alternative revenue programs and other operating revenue	(1,159)	(269)	178
Total operating revenue	$ 7,263	$ 8,164	$ 7,002