Interest and Other Income and Expenses (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Other income:
Total consolidated interest and other income	$ 23	$ 34
Other expenses:
Total consolidated other expenses	8	11
Southern California Edison
Other income:
Equity allowance for funds used during construction	13	21
Increase in cash surrender value of life insurance policies	7	7
Interest income	2	2
Other	1	2
Total interest and other income	23	32
Total consolidated interest and other income	23	32
Other expenses:
Civic, political and related activities and donations	5	5
Other	2	5
Total other expenses	7	10
Total consolidated other expenses	7	10
Edison International
Other income:
Other income	0	2
Other expenses:
Other expenses	$ 1	$ 1