Other Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SCE other income and (expenses):
Total other income and (expenses)	$ 251	$ 193	$ 197
Edison International Parent
SCE other income and (expenses):
Net periodic benefit income – non-service components	(2)	(3)	(2)
Other	(2)	1	5
SCE
SCE other income and (expenses):
Equity allowance for funds used during construction	121	101	104
Increase in cash surrender value of life insurance policies and life insurance benefits	66	39	36
Interest income	20	37	24
Net periodic benefit income – non-service components	102	70	81
Civic, political and related activities and donations	(42)	(46)	(44)
Other expense	(12)	(6)	(7)
Total other income and (expenses)	$ 255	$ 195	$ 194