Preferred and Preference Stock of Utility (Textual) (Details) (Southern California Edison, USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2014
Cumulative Preferred Stock 100 Dollars Par Value
Preferred and Preference Stock of Utility
Preferred Stock, Par or Stated Value Per Share	$ 100
Preferred Stock, Shares Authorized	12,000,000
Preferred and Preference Stock
Preferred and Preference Stock of Utility
Dividends payable	$ 18
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
No par value:
Preferred and Preference Stock of Utility
Preferred Stock, Shares Authorized	50,000,000