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Debt (Schedule of Loss on Debt Extinguishment) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Extinguishment of Debt [Line Items]    
Loss on debt extinguishment $ 2.6 $ (14.1)
Financing Agreement, April 2014 [Member]    
Extinguishment of Debt [Line Items]    
Loss on debt extinguishment 1.1  
Financing Arrangement, February 2017 [Member]    
Extinguishment of Debt [Line Items]    
Debt issuance costs 4.7  
Loss on debt extinguishment 1.5  
Long-term Debt [Member] | Financing Arrangement, February 2017 [Member]    
Extinguishment of Debt [Line Items]    
Debt issuance costs 3.2  
Discharge of Debt [Member] | Financing Arrangement, February 2017 [Member]    
Extinguishment of Debt [Line Items]    
Debt issuance costs $ 1.5