Commitments and Contingencies (Commitments Textual) (Details) (Southern California Edison, USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Commitments And Contingencies [Line Items]
Operating lease rent expense	$ 78,000,000	$ 75,000,000	$ 66,000,000
Decommissioning liability	3,300,000,000
Decommissioning estimated cost	7,100,000,000
Decommissioning cost escalated rates, low end of range (percent)	1.50%
Decommissioning cost escalated rates, high end of range (percent)	7.30%
Decommissioning trusts contribution amount per year	23,000,000	23,000,000	23,000,000
Decommissioning funds estimated annual earnings, net of tax percentage, low end of range (percent)	4.20%
Decommissioning funds estimated annual earnings, net of tax percentage, high end of range (percent)	5.70%
Decommissioning expense under rate making method	23,000,000
Decommissioning active nuclear facilities asset retirement obligation	3,300,000,000	2,600,000,000
Decommissioning expenditures to date	599,000,000
Renewable Energy Contracts
Schedule Of Commitments And Contingencies [Line Items]
Number of renewable energy contracts (number of contracts)	108
Qualifying Facility Power Purchase Agreements
Schedule Of Commitments And Contingencies [Line Items]
Number of qualifying small power production facility contracts (number of contracts)	139
Combined Heat and Power Contracts
Schedule Of Commitments And Contingencies [Line Items]
Number of combined heat and power contracts (number of contracts)	32
Other Purchase Agreements
Schedule Of Commitments And Contingencies [Line Items]
Number of tolling arrangements (number of agreements)	15
Number of power call options (options)	4
Number of resource adequacy contracts (number of contracts)	55
Other Contractual Obligations
Schedule Of Commitments And Contingencies [Line Items]
Costs incurred for other commitments	153,000,000	249,000,000	281,000,000
Operating Leases Purchase Power Contracts
Schedule Of Commitments And Contingencies [Line Items]
Operating lease expense	1,500,000,000	1,300,000,000	1,400,000,000
Capital Leases Power Contracts
Schedule Of Commitments And Contingencies [Line Items]
Capital lease power purchase agreement	209,000,000	216,000,000
Capital leases accumulated amortization	39,000,000	33,000,000
Capital leases future minimum payments, current	6,000,000	6,000,000
Capital leases future minimum payments, noncurrent	203,000,000	210,000,000
San Onofre [Member]
Schedule Of Commitments And Contingencies [Line Items]
Net Regulatory Assets	1,300,000,000
San Onofre [Member] | Estimated Losses on Disposal of Nuclear Fuel Inventory [Member]
Schedule Of Commitments And Contingencies [Line Items]
Net Regulatory Assets	$ 33,000,000