Variable Interest Entities (Details) (Southern California Edison, USD $)	12 Months Ended				1 Months Ended		12 Months Ended	1 Months Ended		12 Months Ended
	Dec. 31, 2013 Series G Preferred Stock	Dec. 31, 2013 Series F Preferred Stock	Dec. 31, 2013 SCE Trust I	Dec. 31, 2012 SCE Trust I	May 31, 2012 SCE Trust I Trust Securities	May 31, 2012 SCE Trust I Series F Preferred Stock	Dec. 31, 2013 SCE Trust II	Jan. 31, 2013 SCE Trust II Trust Securities	Jan. 31, 2013 SCE Trust II Series G Preferred Stock	Dec. 31, 2013 Variable Interest Entity, Not Primary Beneficiary SCE Power Purchase Contracts MW	Dec. 31, 2012 Variable Interest Entity, Not Primary Beneficiary SCE Power Purchase Contracts MW
Details of projects or entities
Power generating capacity for majority interest (in megawatts)										5,183	2,198
Payments to unconsolidated VIEs for power purchase contracts										$ 715,000,000	$ 397,000,000
Unconsolidated Trust
Liquidation preference					475,000,000	475,000,000		400,000,000	400,000,000
Security dividend rate, (as a percent)	5.10%	5.625%			5.625%			5.10%
Liquidation value (in dollars per share)					$ 25	$ 2,500		$ 25	$ 2,500
Common stock					10,000			10,000
Dividend income and distributions			$ 27,000,000	$ 17,000,000			$ 19,000,000