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Stock Repurchase Plan Authorizations (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2014
Earnings Per Share [Abstract]    
Amount authorized for repurchase under share repurchase authorization   $ 350.0
Number of shares repurchased 2.3 3.2
Weighted Average Price Of Shares Repurchased $ 14.71 $ 14.77
Value for shares repurchased $ 33.9 $ 46.9