Other Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Other Income And Expense [Line Items]
Total other income and (expenses)	$ 85	$ 47	$ 219	$ 195
SCE
Other Income And Expense [Line Items]
Equity allowance for funds used during construction	30	32	91	92
Increase in cash surrender value of life insurance policies and life insurance benefits	9	8	30	33
Interest income	19	1	36	2
Net periodic benefit income - non-service components	34	33	99	99
Civic, political and related activities and donations	(11)	(16)	(29)	(28)
Other	(10)	(5)	(17)	(9)
Total other income and (expenses)	71	53	210	189
Edison International Parent and Other
Other Income And Expense [Line Items]
Net gains (losses) on equity securities	8	(8)	2	4
Other	$ 6	$ 2	$ 7	$ 2