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Accrued Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Payables and Accruals [Abstract]    
Employee compensation and benefits $ 50.7 $ 48.9
Accrued taxes payable 3.7 4.3
Recoupments payable and reserves 8.1 9.3
Short-term contingent consideration 0.0 3.4
Accrued royalties 5.0 3.8
Purchase commitment 5.9 0.0
Other accrued liabilities 17.5 9.4
Total accrued liabilities $ 90.9 $ 79.1