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Leases - Components of Lease Cost (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]      
Operating lease cost $ 11.0 $ 6.8 $ 7.5
Short-term lease cost 3.2 1.6 1.2
Amortization of leased assets 2.1 1.6 1.5
Interest on lease liabilities 0.3 0.3 0.3
Total lease cost $ 16.6 $ 10.3 $ 10.5