Revenue (Summary) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Revenue
Total operating revenue	$ 4,336	$ 3,964	$ 8,414	$ 7,930
SCE
Revenue
Revenue from contracts with customers	4,101	3,589	7,871	7,325
Alternative Revenue Programs and Other Operating Revenue	223	360	517	574
Total operating revenue	4,324	3,949	8,388	7,899
Receivables from contracts with customers	3,000		3,000		$ 2,500
Accrued unbilled revenues	1,000		1,000		$ 741
SCE | Earning Activities
Revenue
Revenue from contracts with customers	2,171	2,043	4,346	4,119
Alternative Revenue Programs and Other Operating Revenue	436	124	710	281
Total operating revenue	2,607	2,167	5,056	4,400
SCE | Cost- Recovery Activities
Revenue
Revenue from contracts with customers	1,930	1,546	3,525	3,206
Alternative Revenue Programs and Other Operating Revenue	(213)	236	(193)	293
Total operating revenue	$ 1,717	$ 1,782	$ 3,332	$ 3,499