XML 45 R36.htm IDEA: XBRL DOCUMENT v3.22.0.1
Common Shares (Tables)
 9 Months Ended
Jan. 31, 2022
Stockholders' Equity Note [Abstract]  
Common shares information The following table sets forth common share information.
January 31, 2022April 30, 2021
Common shares authorized300.0 300.0 
Common shares outstanding108.5 108.3 
Treasury shares38.0 38.2