Revenue (Summary) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Revenue
Total operating revenue	$ 4,008	$ 3,315	$ 7,976	$ 6,275
SCE
Revenue
Revenue from contracts with customers	4,000	3,126	7,360	6,025
Alternative revenue programs and other operating revenue	(4)	180	597	234
Total operating revenue	3,996	3,306	7,957	6,259
Receivables from contracts with customers	2,600		2,600		$ 2,300
Accrued unbilled revenues	1,100		1,100		$ 794
SCE | Earning Activities
Revenue
Revenue from contracts with customers	1,978	1,703	3,963	3,407
Alternative revenue programs and other operating revenue	186	127	468	190
Total operating revenue	2,164	1,830	4,431	3,597
SCE | Cost- Recovery Activities
Revenue
Revenue from contracts with customers	2,022	1,423	3,397	2,618
Alternative revenue programs and other operating revenue	(190)	53	129	44
Total operating revenue	$ 1,832	$ 1,476	$ 3,526	$ 2,662