Revenue (Summary) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Aug. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue
Total operating revenue		$ 14,905	$ 13,578	$ 12,347
SCE
Revenue
Revenues from contracts with customers		14,347	12,459	11,167
Alternative revenue programs and other operating revenue		527	1,087	1,139
Total operating revenue		14,874	13,546	12,306
Receivables from contracts with customers		2,300	1,500
Accrued unbilled revenues		794	521
SCE | Earning Activities
Revenue
Revenues from contracts with customers		7,523	6,920	6,512
Alternative revenue programs and other operating revenue		349	548	166
Total operating revenue		7,872	7,468	6,678
SCE | Cost- Recovery Activities
Revenue
Revenues from contracts with customers		6,824	5,539	4,655
Alternative revenue programs and other operating revenue		178	539	973
Total operating revenue		$ 7,002	$ 6,078	$ 5,628
2021 General Rate Case | SCE
Revenue
Approved regulatory increase (decrease)	$ 1,000