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Common Shares (Tables)
 3 Months Ended
Jul. 31, 2025
Stockholders' Equity Note [Abstract]  
Common shares information
The following table sets forth common share information.
July 31, 2025April 30, 2025
Common shares authorized300.0 300.0 
Common shares outstanding106.7 106.4 
Treasury shares43.8 44.1