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Stock-Based Compensation - Share-based Compensation Expense (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense (income) $ 4.9 $ 4.8
Stock option compensation expense    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense (income) 2.1 1.7
RSU compensation expense    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense (income) 2.1 2.5
PSU compensation expense    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense (income) $ 0.7 $ 0.6