v3.26.1
Stock-Based Compensation Plans - Summary of Performance Share Units Activity (Details) - USD ($)
$ / shares in Units, $ in Millions
 6 Months Ended 12 Months Ended
Jul. 31, 2026
Jan. 31, 2026
Stock-Based Compensation Plans    
Vested or expected to vest, shares (in shares) 2,215,613  
Vested or expected to vest, weighted-average granted date fair value (in dollars per share) $ 73.44  
Vested or expected to vest, weighted-average remaining contractual life (Year) 4 years 8 months 12 days  
Vested or expected to vest, aggregate intrinsic value $ 19.2  
PSU    
Stock-Based Compensation Plans    
Number of Units Outstanding (in shares), Beginning 1,012,268  
Weighted-Average Granted Date Fair Value (in dollars per share), Beginning $ 69.58  
Weighted-Average Remaining Contractual (years) 5 years 2 months 12 days 4 years 4 months 24 days
Aggregate Intrinsic Value $ 82.3 $ 73.9
PSUs Granted (in shares) 149,664  
PSUs Granted, weighted-average granted date fair value (in dollars per share) $ 101.51  
Performance units issued (in shares) 20,688  
Performance units issued, weighted-average granted date fair value (in dollars per share) $ 103.33  
Exercised (in shares) (100,242)  
Exercised, weighted-average granted date fair value (in dollars per share) $ 12.09  
Number of Units Outstanding (in shares), Ending 1,082,378 1,012,268
Weighted-Average Granted Date Fair Value (in dollars per share), Ending $ 69.36 $ 69.58
Vested or expected to vest, shares (in shares) 1,082,378  
Vested or expected to vest, weighted-average granted date fair value (in dollars per share) $ 69.36  
Vested or expected to vest, weighted-average remaining contractual life (Year) 5 years 2 months 12 days  
Vested or expected to vest, aggregate intrinsic value $ 82.3  
Exercisable, number of units (in shares) 762,185  
Exercisable, weighted-average granted date fair value (in dollars per share) $ 52.62  
Exercisable, weighted-average remaining contractual (years) 3 years 8 months 12 days  
Exercisable, aggregate intrinsic value $ 58.0