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Preferred and Preference Stock of Utility (Details) (SCE Trust II, Southern California Edison, Series G Preferred Stock, USD $)
3 Months Ended
Mar. 31, 2013
Jan. 31, 2013
SCE Trust II | Southern California Edison | Series G Preferred Stock
   
Preferred and Preference Stock of Utility    
Shares issued (in shares) 160,004  
Preference stock dividend rate (percent) 5.10%  
Liquidation value (in dollars per share) $ 2,500 $ 2,500