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Stock-Based Compensation Plans - Summary of Restricted Share Units Activity (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Jan. 31, 2024
Jan. 31, 2023
Jan. 31, 2022
Stock-Based Compensation Plans      
Vested or expected to vest, weighted-average exercise price (in dollars per share) $ 52.31    
Vested or expected to vest, weighted-average remaining contractual life (Year) 3 years 10 months 24 days    
Vested or expected to vest, aggregate intrinsic value $ 54.8    
RSU      
Stock-Based Compensation Plans      
Number of Units Outstanding (in shares), Beginning 474,631 410,980  
Weighted-Average Granted Date Fair Value (in dollars per share), Beginning $ 32.44 $ 29.17  
Weighted-Average Remaining Contractual (years) 4 years 9 months 18 days 4 years 8 months 12 days 5 years
Aggregate Intrinsic Value $ 42.1 $ 35.2 $ 30.3
RSUs Granted (in shares) 61,774 63,651  
RSUs Granted, weighted-average granted date fair value (in dollars per share) $ 79.89 $ 61.53  
Exercised (in shares) (53,898)    
Exercised, weighted-average granted date fair value (in dollars per share) $ 8.52    
Forfeited (in shares) (413)    
Forfeited, weighted-average granted date fair value (in dollars per share) $ 60.66    
Number of Units Outstanding (in shares), Ending 482,094 474,631 410,980
Weighted-Average Granted Date Fair Value (in dollars per share), Ending $ 40.19 $ 32.44 $ 29.17
Vested or expected to vest, RSU (in shares) 482,094    
Vested or expected to vest, weighted-average exercise price (in dollars per share) $ 40.19    
Vested or expected to vest, weighted-average remaining contractual life (Year) 4 years 9 months 18 days    
Vested or expected to vest, aggregate intrinsic value $ 42.1    
Exercisable, number of units (in shares) 419,690    
Exercisable, weighted-average granted date fair value (in dollars per share) $ 35.32    
Exercisable, weighted-average remaining contractual (years) 4 years 3 months 18 days    
Exercisable, aggregate intrinsic value $ 36.6