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Share-Based Compensation - Schedule of Share-Based Payment Arrangement Activity Expensed (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Share-based compensation expense, before tax $ 3.9 $ 7.8 $ 17.9 $ 29.0
Income tax benefit (0.9) (1.8) (4.3) (6.9)
Share-based compensation expense, after tax 3.0 6.0 13.6 22.1
Restricted stock units        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Share-based compensation expense, before tax 2.9 3.1 9.3 11.3
Performance based restricted share unit awards        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Share-based compensation expense, before tax 1.0 4.7 8.6 16.6
Cash-settled restricted stock        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Share-based compensation expense, before tax $ 0.0 $ 0.0 $ 0.0 $ 1.1