Revenue (Summary) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Revenue
Total operating revenue	$ 3,964	$ 4,008	$ 7,930	$ 7,976
SCE
Revenue
Revenue from contracts with customers	3,589	4,000	7,325	7,360
Alternative revenue programs and other operating revenue	360	(4)	574	597
Total operating revenue	3,949	3,996	7,899	7,957
Receivables from contracts with customers	2,300		2,300		$ 2,300
Accrued unbilled revenues	756		756		$ 638
SCE | Earning Activities
Revenue
Revenue from contracts with customers	2,043	1,978	4,119	3,963
Alternative revenue programs and other operating revenue	124	186	281	468
Total operating revenue	2,167	2,164	4,400	4,431
SCE | Cost- Recovery Activities
Revenue
Revenue from contracts with customers	1,546	2,022	3,206	3,397
Alternative revenue programs and other operating revenue	236	(190)	293	129
Total operating revenue	$ 1,782	$ 1,832	$ 3,499	$ 3,526