Equity (Issuances) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022
SCE
Class of Stock [Line Items]
Capital contributions	$ 700	$ 700
401(K)
Class of Stock [Line Items]
Stock issued (in shares)	31,000	71,000
Proceeds received, net of offering costs	$ 2	$ 5
Internal Programs Employee Stock Purchase Plan
Class of Stock [Line Items]
Stock issued (in shares)		14,269
Proceeds received, net of offering costs		$ 1
Voluntary cash purchases
Class of Stock [Line Items]
Stock issued (in shares)		12,864
Proceeds received, net of offering costs		$ 1
Stock compensation awards
Class of Stock [Line Items]
Stock issued (in shares)	393,863	784,832
Proceeds received, net of offering costs	$ 20	$ 31
In lieu of dividend payment
Class of Stock [Line Items]
Stock issued (in shares)	64,531	136,346
Proceeds received, net of offering costs	$ 5	$ 9