Other Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Income And Expense [Line Items]
Total other income and (expenses)	$ 237	$ 251	$ 193
SCE
Other Income And Expense [Line Items]
Equity allowance for funds used during construction	118	121	101
Increase in cash surrender value of life insurance policies and life insurance benefits	40	66	39
Interest income	3	20	37
Net periodic benefit income - non-service components	123	102	70
Civic, political and related activities and donations	(39)	(42)	(46)
Other income and (expenses)	(12)	(12)	(6)
Total other income and (expenses)	233	255	195
Edison International Parent and Other
Other Income And Expense [Line Items]
Net periodic benefit income - non-service components	(2)	(2)	(3)
Unrealized gains on equity securities	4
Other income and (expenses)	$ 2	$ (2)	$ 1