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Share-Based Compensation - Schedule of Share-Based Payment Arrangement Activity Expensed (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Share-based compensation expense, before tax $ 14.2 $ 12.4
Income tax benefit (3.4) (3.0)
Share-based compensation expense, after tax 10.8 9.4
Stock options    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Share-based compensation expense, before tax 0.0 0.1
Restricted stock units    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Share-based compensation expense, before tax 4.8 4.6
Restricted stock awards    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Share-based compensation expense, before tax 0.0 0.2
Performance based restricted share unit awards    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Share-based compensation expense, before tax 8.3 7.5
Cash-settled restricted stock    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Share-based compensation expense, before tax $ 1.1 $ 0.0