Interest and Other Income and Other Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
SCE interest and other income:
Interest and other income	$ 33	$ 43	$ 65	$ 82
SCE other expenses:
Total Edison International other expenses	11	17	19	24
Southern California Edison
SCE interest and other income:
Equity allowance for funds used during construction	19	21	42	42
Increase in cash surrender value of life insurance policies	11	7	17	17
Interest income	2	2	3	3
Other	1	1	3	2
Total SCE interest and other income	33	31	65	64
Interest and other income	33	31	65	64
SCE other expenses:
Civic, political and related activities and donations	8	9	12	14
Other	3	8	7	10
Total SCE other expenses	11	17	19	24
Total Edison International other expenses	11	17	19	24
Edison International Parent and Other
SCE interest and other income:
Other income of Edison International Parent and Other	$ 0	$ 12	$ 0	$ 18