Revenue (Summary) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Revenue
Total operating revenue	$ 3,966	$ 3,968
SCE
Revenue
Revenue from contracts with customers	3,736	3,360
Alternative revenue programs and other operating revenue	214	601
Total operating revenue	3,950	3,961
Receivables from contracts with customers	2,200		$ 2,300
Accrued unbilled revenues	766,000		$ 638
SCE | Earning Activities
Revenue
Revenue from contracts with customers	2,076	1,985
Alternative revenue programs and other operating revenue	157	282
Total operating revenue	2,233	2,267
SCE | Cost- Recovery Activities
Revenue
Revenue from contracts with customers	1,660	1,375
Alternative revenue programs and other operating revenue	57	319
Total operating revenue	$ 1,717	$ 1,694