Equity (Issuances) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Aug. 31, 2022
SCE
Class of Stock [Line Items]
Capital contributions	$ 0	$ 700
401(K)
Class of Stock [Line Items]
Stock issued (in shares)	35,000	106,000
Proceeds received, net of offering costs	$ 2	$ 7
Internal Programs Employee Stock Purchase Plan
Class of Stock [Line Items]
Stock issued (in shares)	22,643	36,912
Proceeds received, net of offering costs		$ 2
Voluntary cash purchases
Class of Stock [Line Items]
Stock issued (in shares)		16,441
Proceeds received, net of offering costs	$ 1	$ 1
Stock compensation awards
Class of Stock [Line Items]
Stock issued (in shares)	349,748	1,134,580
Proceeds received, net of offering costs	$ 20	$ 51
In lieu of dividend payment
Class of Stock [Line Items]
Stock issued (in shares)	64,917	201,263
Proceeds received, net of offering costs	$ 4	$ 13
At-the-market Program (ATM)
Class of Stock [Line Items]
Stock issued (in shares)		0
Aggregate sale price			$ 500