Interest and Other Income and Other Expenses (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
SCE interest and other income:
Total Edison International interest and other income		$ 174	$ 147	$ 124
SCE other expenses:
Total Edison International other expenses		(59)	(80)	(74)
Southern California Edison
SCE interest and other income:
Equity allowance for funds used during construction		87	65	72
Increase in cash surrender value of life insurance policies and life insurance benefits		26	36	30
Interest income		4	5	10
Other		6	16	10
Total SCE interest and other income		123	122	122
Total Edison International interest and other income		123	122	122
SCE other expenses:
Civic, political and related activities and donations		(35)	(35)	(37)
Other		(24)	(44)	(37)
Total SCE other expenses		(59)	(79)	(74)
Total Edison International other expenses		(59)	(79)	(74)
Edison International
SCE interest and other income:
Other income of Edison International Parent and Other1	[1]	51	25	2
SCE other expenses:
Other expense of Edison International Parent and Other		$ 0	$ (1)	$ 0

[1] Reflects Edison Capital's income related to the sale of affordable housing projects.