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Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accured Expenses (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Payables And Accruals [Abstract]    
Trade accounts payable $ 256.1 $ 178.1
Employee-related expenses 49.6 38.5
Accrued vacation 25.6 22.4
Miscellaneous accrued expenses 83.9 90.4
Total accounts payable and accrued expenses $ 415.2 $ 329.4