Other Income and Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
SCE other income and expenses:
Net periodic benefit income – non-service components		$ (1)		$ 7
Total other income and expense	$ 49	24	$ 100	57
Other income and expenses of Edison International Parent and Other:
Net periodic benefit income – non-service components		(1)		7
Total other income and expense	49	24	100	57
Edison International Parent and Other
SCE other income and expenses:
Net periodic benefit income – non-service components	(1)	(10)	(1)	(11)
Other	0	1	0	0
Other income and expenses of Edison International Parent and Other:
Net periodic benefit income – non-service components	(1)	(10)	(1)	(11)
Other	0	1	0	0
Southern California Edison
SCE other income and expenses:
Equity allowance for funds used during construction	22	23	44	41
Increase in cash surrender value of life insurance policies	6	10	14	22
Interest income	5	1	9	3
Net periodic benefit income – non-service components	27	9	53	18
Civic, political and related activities and donations	(12)	(7)	(16)	(10)
Other		(3)	(3)	(6)
Other	2
Total other income and expense	50	33	101	68
Other income and expenses of Edison International Parent and Other:
Net periodic benefit income – non-service components	27	9	53	18
Other	2
Total other income and expense	$ 50	$ 33	$ 101	$ 68