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Commitments and Contingencies - Operating Leases (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]      
Operating lease expenses $ 33.5 $ 41.4 $ 32.3
Operating leases future minimum lease payments [Abstract]      
2017 24.6    
2018 18.8    
2019 15.1    
2020 9.6    
2021 8.2    
Thereafter 12.3    
Total $ 88.6