Other Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
SCE other income (expense):
Total SCE other income	$ 52	$ 38
Other income (expense) of Edison International Parent and Other:
Total Edison International other income	52	38
Edison International Parent and Other
SCE other income (expense):
Net periodic benefit costs – non-service components	(1)	(2)
Other income (expense) of Edison International Parent and Other:
Net periodic benefit costs – non-service components	(1)	(2)
Other	1	2
Southern California Edison
SCE other income (expense):
Equity allowance for funds used during construction	21	17
Increase in cash surrender value of life insurance policies	10	9
Interest income	9	9
Net periodic benefit costs – non-service components	28	19
Civic, political and related activities and donations	(11)	(13)
Other	(5)	(3)
Total SCE other income	52	38
Other income (expense) of Edison International Parent and Other:
Net periodic benefit costs – non-service components	28	19
Total Edison International other income	$ 52	$ 38