Other Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Other Income And Expense [Line Items]
Total other income and (expenses)	$ 68	$ 72
SCE
Other Income And Expense [Line Items]
Equity allowance for funds used during construction	30	35
Increase in cash surrender value of life insurance policies and life insurance benefits	16	10
Interest income	3
Net periodic benefit income - non-service components	34	33
Civic, political and related activities and donations	(9)	(4)
Other income and (expenses)	(3)	(2)
Total other income and (expenses)	71	$ 72
Edison International Parent and Other
Other Income And Expense [Line Items]
Net loss on equity securities	(2)
Other income and (expenses)	$ (1)