Preferred and Preference Stock of Utility (Textual) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Preferred and Preference Stock
Preferred and Preference Stock of Utility
Preferred stock, shares issued	0	0	0
Preferred stock, shares redeemed	0	0	0
Dividends payable	$ 14,000,000	$ 18,000,000	$ 30,000,000
Southern California Edison | Cumulative Preferred Stock 100 Dollars Par Value [Member]
Preferred and Preference Stock of Utility
Preferred stock, par value, in dollars per share	$ 100
Preferred stock, shares authorized	12,000,000
Southern California Edison | Cumulative preferred stock 25 dollars par value
Preferred and Preference Stock of Utility
Preferred stock, par value, in dollars per share	$ 25
Preferred stock, shares authorized	24,000,000
Southern California Edison | No par value:
Preferred and Preference Stock of Utility
Preferred stock, shares authorized	50,000,000
Southern California Edison | Series J Preferred Stock
Preferred and Preference Stock of Utility
Liquidation preference	$ 325,000,000
Southern California Edison | Preferred and Preference Stock
Preferred and Preference Stock of Utility
Dividends payable	$ 14,000,000	$ 18,000,000	$ 30,000,000