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Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accured Expenses (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Payables And Accruals [Abstract]    
Trade accounts payable $ 265.1 $ 249.2
Employee-related expenses 49.6 59.5
Accrued vacation 25.9 24.3
Miscellaneous accrued expenses 81.3 92.2
Total $ 421.9 $ 425.2