Other Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Other Income And Expense [Line Items]
Total other income and (expenses)	$ 66	$ 76	$ 134	$ 148
SCE
Other Income And Expense [Line Items]
Equity allowance for funds used during construction	30	25	61	60
Increase in cash surrender value of life insurance policies and life insurance benefits	6	15	21	25
Interest income	15	1	17	1
Net periodic benefit income - non-service components	31	33	65	66
Civic, political and related activities and donations	(9)	(8)	(18)	(12)
Other	(5)	(2)	(7)	(4)
Total other income and (expenses)	68	64	139	136
Edison International Parent and Other
Other Income And Expense [Line Items]
Net (losses) gains on equity securities	(4)	$ 12	(6)	$ 12
Other	$ 2		$ 1