Interest and Other Income and Expenses (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Other income:
Total consolidated interest and other income	$ 34	$ 40	$ 63	$ 73
Other expenses:
Total consolidated other expenses	14	19	21	26
Southern California Edison
Other income:
Equity allowance for funds used during construction	18	27	39	47
Increase in cash surrender value of life insurance policies	7	7	14	14
Interest income	4	2	6	3
Other	1	2	2	6
Total interest and other income	30	38	61	70
Total consolidated interest and other income	30	38	61	70
Other expenses:
Civic, political and related activities and donations	9	10	15	17
Other	5	9	6	9
Total other expenses	14	19	21	26
Total consolidated other expenses	14	19	21	26
Edison International
Other income:
Other income	4	2	2	3
Other expenses:
Other expenses	$ 0	$ 0	$ 0	$ 0