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Earnings Per Share - Schedule of Shares Excluded from Calculation of Basic and Diluted Earnings Per Share (Details) - shares
shares in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Stock Options And Restricted Stock        
Antidilutive Securities Excluded from Computation of Earnings Per Share        
Antidilutive securities excluded from computation of earnings per share, amount 0.0 0.2 0.0 0.2
Junior Convertible Trust Preferred Securities        
Antidilutive Securities Excluded from Computation of Earnings Per Share        
Antidilutive securities excluded from computation of earnings per share, amount 0.0 0.0 0.0 2.6