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Leases - Lease Cost (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Lease Cost    
Operating Lease, Right-Of-Use Asset, Amortization $ 0.2 $ 0.3
Operating Lease, Cost 22.3 20.9
Variable Lease, Cost 0.2  
Short-Term Lease Cost 5.0 4.6
Total Lease Expense 27.7 25.8
Less: Sublease Income 0.3  
Lease, Cost $ 27.4 $ 25.8