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Stockholders' Equity Repurchase Program (Details) (USD $)
In Millions, except Share data, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Apr. 14, 2014
Repurchase Program [Abstract]    
Stock Repurchase Program, Authorized Amount   $ 500
Stock Repurchased During Period, Shares 165,900  
Stock Repurchased During Period, Value 25  
Stock Repurchase Program, Remaining Authorized Repurchase Amount $ 475