Summary of Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Southern California Edison
Revenue Recognition [Abstract]
Revenue received as agent			$ 1,100,000,000
Sales and Use Taxes [Abstract]
Franchise fees billed to customers	116,000,000	98,000,000	101,000,000
Dividend Restrictions [Abstract]
Weighted-average common equity component authorization, set by CPUC remaining over number of months (in months)	13 months
Period for calculation of weighted average common equity component (months)	13 months
Weighted-average common equity component of total capitalization (as a percent)	49.20%
Capacity to pay additional dividends	247,000,000
Restriction on net assets	$ 11,900,000,000
Edison International
Dividend Restrictions [Abstract]
Minimum percentage of weighted-average common equity component authorization, set by CPUC (as a percent)	48.00%
Electric Utility | Southern California Edison
Summary of Significant Accounting Policies [Line Items]
Supply of electricity, area covered (square mile)	50,000