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Stock-Based Compensation (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation $ 3.8 $ 3.9 $ 7.4 $ 7.9
Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation 0.0 0.1 0.0 0.3
Time-based restricted share units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation 2.4 2.5 4.9 5.4
Performance-based restricted share units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation 1.4 1.3 2.4 2.1
Employee stock purchase plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation $ 0.0 $ 0.0 $ 0.1 $ 0.1