Revenue (Summary) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Revenue
Total operating revenue	$ 5,228	$ 5,299		$ 13,204	$ 11,574
SCE
Revenue
Revenue from contracts with customers	5,953	5,064		13,313	11,089
Alternative revenue programs and other operating revenue	(736)	229		(139)	463
Total operating revenue	5,217	5,293		13,174	11,552
Receivables from contracts with customers	3,500			3,500		$ 2,300
Accrued unbilled revenues	1,300			1,300		$ 794
SCE | Earning Activities
Revenue
Revenue from contracts with customers	2,350	2,260		6,313	5,667
Alternative revenue programs and other operating revenue	100	135		568	325
Total operating revenue	2,450	2,395		6,881	5,992
SCE | Cost- Recovery Activities
Revenue
Revenue from contracts with customers	3,603	2,804		7,000	5,422
Alternative revenue programs and other operating revenue	(836)	94		(707)	138
Total operating revenue	$ 2,767	$ 2,898		$ 6,293	$ 5,560
2021 General Rate Case | SCE
Revenue
Revenue from contracts with customers			$ 404