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Commitments and Contingencies - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]      
Operating leases, rent expense, net $ 49.7 $ 52.7 $ 48.0
Outstanding bank guarantees 12.7 15.2  
Bank guarantees liability recorded $ 0.0 $ 0.0