Preferred and Preference Stock of Utility (Textual) (Details) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Preferred Stock and Preference Stock
Preferred and Preference Stock of Utility
Dividends payable	$ 30	$ 24	$ 11
Southern California Edison | Cumulative Preferred Stock 100 Dollars Par Value [Member]
Preferred and Preference Stock of Utility
Preferred Stock, Par or Stated Value Per Share	$ 100
Preferred Stock, Shares Authorized	12,000,000
Southern California Edison | Preferred Stock and Preference Stock
Preferred and Preference Stock of Utility
Dividends payable	$ 30	$ 24	$ 11
Southern California Edison | Cumulative preferred stock 25 dollars par value
Preferred and Preference Stock of Utility
Preferred Stock, Par or Stated Value Per Share	$ 25
Preferred Stock, Shares Authorized	24,000,000
Southern California Edison | Preference stock, no par value
Preferred and Preference Stock of Utility
Preferred Stock, Shares Authorized	50,000,000