Other Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
SCE other income (expense):
Total SCE other income	$ 84	$ 58	$ 217	$ 151
Other income (expense) of Edison International Parent and Other:
Other	84	58	217	151
Total Edison International other income	84	58	217	151
Edison International Parent and Other
SCE other income (expense):
Net periodic benefit costs – non-service components	0	0	(1)	(2)
Other income (expense) of Edison International Parent and Other:
Net periodic benefit costs – non-service components	0	0	(1)	(2)
Other	1	0	1	1
Southern California Edison
SCE other income (expense):
Equity allowance for funds used during construction	36	26	87	75
Increase in cash surrender value of life insurance policies	27	9	60	27
Interest income	2	13	18	29
Net periodic benefit costs – non-service components	28	19	83	54
Civic, political and related activities and donations	(7)	(5)	(22)	(26)
Other	(3)	(4)	(9)	(7)
Total SCE other income	83	58	217	152
Other income (expense) of Edison International Parent and Other:
Net periodic benefit costs – non-service components	28	19	83	54
Other	83	58	217	152
Total Edison International other income	$ 83	$ 58	$ 217	$ 152