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Compensation and Benefit Plans (Workforce Reduction) (Details) (Southern California Edison, Employee severance, USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Southern California Edison | Employee severance
 
Restructuring Reserve [Roll Forward]  
Beginning balance $ 54
Additions 9
Payments (17)
Restructuring Reserve, Other Changes (1)
Ending balance $ 45