v3.25.1
Earnings Per Share (Tables)
 6 Months Ended
Mar. 31, 2025
Earnings Per Share [Abstract]  
Computation of basic and diluted earnings per share
Three Months Ended
March 31,		Six Months Ended
March 31,
2025202420252024
Net earnings$58.7 $57.2 $135.6 $101.1 
Weighted-average shares for basic earnings per share128.2 131.0 128.5 131.1 
Effect of dilutive securities:
    Stock options0.2 0.2 0.2 0.2 
    Restricted stock units0.3 0.3 0.3 0.3 
    Performance-based restricted stock units1.2 1.5 1.5 1.4 
Weighted-average shares for diluted earnings per share129.9 133.0 130.5 133.0 
Basic earnings per common share$0.46 $0.44 $1.06 $0.77 
Diluted earnings per common share$0.45 $0.43 $1.04 $0.76