Other Income and (Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
SCE other income and (expense):
Total SCE other income and (expense)	$ 58	$ 76	$ 151	$ 176
Other income and (expense) of Edison International Parent and Other:
Total Edison International other income and (expense)	58	76	151	176
Edison International Parent and Other
SCE other income and (expense):
Net periodic benefit costs – non-service components	0	0	(2)	(1)
Other	0	4	1	4
Other income and (expense) of Edison International Parent and Other:
Net periodic benefit costs – non-service components	0	0	(2)	(1)
Other	0	4	1	4
Southern California Edison
SCE other income and (expense):
Equity allowance for funds used during construction	26	32	75	76
Increase in cash surrender value of life insurance policies	9	16	27	30
Interest income	13	6	29	15
Net periodic benefit costs – non-service components	19	26	54	79
Civic, political and related activities and donations	(5)	(9)	(26)	(25)
Other	(4)		(7)	(2)
Other		1
Total SCE other income and (expense)	58	72	152	173
Other income and (expense) of Edison International Parent and Other:
Net periodic benefit costs – non-service components	19	26	54	79
Other		1
Total Edison International other income and (expense)	$ 58	$ 72	$ 152	$ 173