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Commitments, Contingencies, and Uncertainties (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]      
Rent expense $ 119.3 $ 98.7 $ 76.0
Minimum annual rentals 2016 80.0    
Minium annual rentals 2017 68.8    
Minium annual rentals 2018 51.2    
Minium annual rentals 2019 27.1    
Minium annual rentals 2020 16.2    
Minium annual rentals thereafter 25.7    
Committed for capital expenditures to be completed during 2015 21.2    
Payments for Environmental Liabilities $ 8.1 $ 8.0 $ 7.9