Other Income and Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
SCE other income and expense:
Total SCE other income and expense	$ 55	$ 49	$ 93	$ 100
Other income and expense of Edison International Parent and Other:
Total Edison International other income and expense	55	49	93	100
Edison International Parent and Other
SCE other income and expense:
Net periodic benefit costs – non-service components	0	1	2	1
Other	(1)	0	1	0
Other income and expense of Edison International Parent and Other:
Net periodic benefit costs – non-service components	0	1	2	1
Other	(1)	0	1	0
Southern California Edison
SCE other income and expense:
Equity allowance for funds used during construction	32	22	49	44
Increase in cash surrender value of life insurance policies	9	6	18	14
Interest income	7	5	16	9
Net periodic benefit costs – non-service components	16	27	35	53
Civic, political and related activities and donations	(8)	(12)	(21)	(16)
Other	0		(3)	(3)
Other		2
Total SCE other income and expense	56	50	94	101
Other income and expense of Edison International Parent and Other:
Net periodic benefit costs – non-service components	16	27	35	53
Other		2
Total Edison International other income and expense	$ 56	$ 50	$ 94	$ 101