v3.25.2
Share-Based Compensation - Restricted Stock Options Activity and Status (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Share-Based Compensation        
Share-based compensation expense (benefit) before taxes $ 37.8 $ 49.7 $ 69.6 $ 75.3
RSUs        
Share-Based Compensation        
Number of shares of common stock entitled to recipient upon vesting (in shares) 1   1  
Granted (in shares)     368,117  
Share-based compensation expense (benefit) before taxes $ 26.0 19.2 $ 49.4 34.7
Number of RSUs        
Unvested at beginning of the period (in shares)     1,219,654  
Granted (in shares)     368,117  
Vested (in shares)     (145,968)  
Forfeited (in shares)     (11,649)  
Unvested at the end of the period (in shares) 1,430,154   1,430,154  
Weighted Average Grant Date Fair Value        
Unvested at beginning of the period (in dollars per share)     $ 225.40  
Granted (in dollars per share)     325.36  
Vested (in dollars per share)     213.81  
Forfeited (in dollars per share)     250.27  
Unvested at the end of the period (in dollars per share) $ 252.11   $ 252.11  
Unrecognized compensation cost $ 209.1   $ 209.1  
Weighted average remaining vesting period (in years)     2 years 4 months 24 days  
RSUs with Performance Conditions        
Share-Based Compensation        
Share-based compensation expense (benefit) before taxes $ 9.8 $ 5.1 $ 18.1 $ 7.2
RSUs with Performance Conditions | Executives        
Share-Based Compensation        
Granted (in shares)     100,000 200,000
Awards granted in period, fair value     $ 38.0 $ 47.5
Number of RSUs        
Granted (in shares)     100,000 200,000
RSUs with Performance Conditions | Employees        
Share-Based Compensation        
Granted (in shares)     100,000  
Awards granted in period, fair value     $ 29.3  
Number of RSUs        
Granted (in shares)     100,000