XML 89 R77.htm IDEA: XBRL DOCUMENT v3.23.2
Stock-Based Compensation Plans - Summary of Option Activity (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2023
Jul. 31, 2022
Jul. 31, 2023
Jul. 31, 2022
Jan. 31, 2023
Stock-Based Compensation Plans          
Number of Stock Options Outstanding (in shares), Beginning     1,593,433    
Weighted-Average Exercise Price (in dollars per share), Beginning     $ 45.54    
Weighted-Average Remaining Contractual Life (years)     4 years 3 months 18 days   4 years 1 month 6 days
Aggregate Intrinsic Value $ 41.9   $ 41.9   $ 45.7
Granted, shares (in shares) 2,553 92,422 278,845 354,699  
Granted, weighted-average exercise price (in dollars per share)     $ 80.10    
Exercised, shares (in shares)     (201,511)    
Exercised, weighted-average exercise price (in dollars per share)     $ 30.87    
Forfeited, shares (in shares)     (13,323)    
Forfeited, weighted-average exercise price (in dollars per share)     $ 61.52    
Number of Stock Options Outstanding (in shares), Ending 1,657,444   1,657,444   1,593,433
Weighted-Average Exercise Price (in dollars per share), Ending $ 51.83   $ 51.83   $ 45.54
Vested or expected to vest, shares (in shares) 1,657,444   1,657,444    
Vested or expected to vest, weighted-average exercise price (in dollars per share) $ 51.83   $ 51.83    
Vested or expected to vest, weighted-average remaining contractual life (Year)     4 years 3 months 18 days    
Vested or expected to vest, aggregate intrinsic value $ 41.9   $ 41.9    
Exercisable, shares (in shares) 918,043   918,043    
Exercisable, weighted-average exercise price (in dollars per share) $ 41.39   $ 41.39    
Exercisable, weighted-average remaining contractual life (Year)     3 years 3 months 18 days    
Exercisable, aggregate intrinsic value $ 32.2   $ 32.2