v3.25.1
Earnings per Share
6 Months Ended
Mar. 31, 2025
Earnings Per Share [Abstract]  
Earnings per Share Earnings per Share
Basic earnings per share is based on the weighted-average number of common shares outstanding during the period. Diluted net earnings per share is based on the number of shares used for the basic earnings per share calculation, adjusted for the dilutive effect of share options, restricted share equivalent (“RSE”) and performance restricted share equivalent (“PRSE”) awards.
The following is the reconciliation between the number of weighted-average shares used in the basic and diluted net earnings per share calculation:    
Three Months Ended
March 31,
Six Months Ended
March 31,
 2025202420252024
Basic weighted-average shares outstanding48.0 49.8 48.3 50.0 
Effect of dilutive securities:
Options, RSE and PRSE awards0.2 0.4 0.1 0.3 
Total dilutive securities0.2 0.4 0.1 0.3 
Diluted weighted-average shares outstanding48.2 50.2 48.4 50.3 

The following weighted-average common shares were excluded from the calculation of diluted net earnings per share because the effect of including these awards was antidilutive.
Three Months Ended
March 31,
Six Months Ended
March 31,
2025202420252024
Options, RSE and PRSE awards1.8 1.4 1.6 1.6