Debt and Credit Agreements (Long-Term Debt) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Current portion of long-term debt	$ (601)	$ 0
Long-term debt	9,825	9,231
Edison International Parent And Other [Member]
Debt Instrument [Line Items]
Other Long-term Debt	4	4
Current portion of long-term debt	(1)	0
Unamortized debt discount, net	0	(1)
Long-term debt	403	403
Edison International Parent And Other [Member] | Debentures and notes
Debt Instrument [Line Items]
Long-term Debt, Gross	400	400
Southern California Edison
Debt Instrument [Line Items]
Current portion of long-term debt	(600)	0
Unamortized debt discount, net	(38)	(32)
Long-term debt	9,422	8,828
Southern California Edison | Debentures and notes
Debt Instrument [Line Items]
Long-term Debt, Gross	307	307
Interest rate on debt, minimum (as a percent)	5.06%
Interest rate on debt, maximum (as a percent)	6.65%
Southern California Edison | First and refunding mortgage bonds
Debt Instrument [Line Items]
Long-term Debt, Gross	8,975	7,775
Interest rate on debt, minimum (as a percent)	3.50%
Interest rate on debt, maximum (as a percent)	6.05%
Southern California Edison | Pollution control bonds
Debt Instrument [Line Items]
Long-term Debt, Gross	939	939
Interest rate on debt, minimum (as a percent)	1.375%
Interest rate on debt, maximum (as a percent)	5.00%
Southern California Edison | Bonds repurchased
Debt Instrument [Line Items]
Long-term Debt, Gross	$ (161)	$ (161)