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Debt - Capital Leases (Details) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Capital Leases $ 135.2 $ 129.7
Less: accumulated amortization (63.5) (66.0)
Total 71.7 63.7
Buildings    
Debt Instrument [Line Items]    
Capital Leases 2.0 2.0
Vehicles    
Debt Instrument [Line Items]    
Capital Leases 131.8 114.1
Machinery and equipment    
Debt Instrument [Line Items]    
Capital Leases $ 1.4 $ 13.6