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Compensation and Benefit Plans (Restricted Stock Unit Activity) (Details) (Restricted Stock Units (RSUs), USD $)
12 Months Ended
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Beginning balance (number of shares) 679,468
Granted (number of shares) 154,401
Forfeited (number of shares) (38,343)
Vested (number of shares) (255,837)
Affiliate transfers, net (number of shares) 0
Ending balance (number of shares) 539,689
Weighted Average Grant Date Fair Value [Abstract]  
Beginning balance, weighted average grant date fair value (dollars per share) $ 38.09
Granted, weighted average grant date fair value (dollars per share) $ 48.45
Forfeited, weighted average grant date fair value (dollars per share) $ 42.15
Vested, weighted average grant date fair value (dollars per share) $ 34.17
Affiliate transfers, net, weighted average grant date fair value (dollars per share) $ 0.00
Ending balance, weighted average grant date fair value (dollars per share) $ 42.70
Southern California Edison
 
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Beginning balance (number of shares) 368,553
Granted (number of shares) 99,616
Forfeited (number of shares) (26,328)
Vested (number of shares) (151,836)
Affiliate transfers, net (number of shares) (2,834)
Ending balance (number of shares) 292,839
Weighted Average Grant Date Fair Value [Abstract]  
Beginning balance, weighted average grant date fair value (dollars per share) $ 38.07
Granted, weighted average grant date fair value (dollars per share) $ 48.47
Forfeited, weighted average grant date fair value (dollars per share) $ 42.96
Vested, weighted average grant date fair value (dollars per share) $ 34.59
Affiliate transfers, net, weighted average grant date fair value (dollars per share) $ 38.10
Ending balance, weighted average grant date fair value (dollars per share) $ 42.98