Other Income and Expenses (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
SCE other income and (expenses):
Total SCE other income and (expenses)	$ 38	$ 51
Other income and (expenses) of Edison International Parent and Other:
Total Edison International other income and (expenses)	38	51
Edison International Parent and Other
SCE other income and (expenses):
Net periodic benefit costs – non-service components	(2)	0
Other income and (expenses) of Edison International Parent and Other:
Net periodic benefit costs – non-service components	(2)	0
Other	2	0
Southern California Edison
SCE other income and (expenses):
Equity allowance for funds used during construction	17	22
Increase in cash surrender value of life insurance policies	9	8
Interest income	9	4
Net periodic benefit costs – non-service components	19	26
Civic, political and related activities and donations	(13)	(4)
Other	(3)	(5)
Total SCE other income and (expenses)	38	51
Other income and (expenses) of Edison International Parent and Other:
Net periodic benefit costs – non-service components	19	26
Total Edison International other income and (expenses)	$ 38	$ 51