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Share-Based Compensation Plans - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
May 31, 2024
Nov. 30, 2024
Feb. 28, 2023
Share-based compensation plans      
Unrecognized share-based compensation   $ 22.5  
Expected recognition period for unrecognized share-based compensation   2 years 1 month 6 days  
Target achievement for performance condition awards, as a percentage     0.00%
Service Condition Awards      
Share-based compensation plans      
Number of awards granted (in shares) 94,900    
Grant date fair value of shares granted in period (in dollars per share) $ 124.37    
Performance Shares      
Share-based compensation plans      
Number of awards granted (in shares) 157,797    
Performance Condition Awards      
Share-based compensation plans      
Number of awards granted (in shares) 94,586    
Grant date fair value of shares granted in period (in dollars per share) $ 124.37    
Market Condition Awards      
Share-based compensation plans      
Number of awards granted (in shares) 63,211    
Grant date fair value of shares granted in period (in dollars per share) $ 91.19