v3.23.1
Earnings per share (Tables)
 6 Months Ended
Mar. 31, 2023
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table sets forth the computation of basic and diluted earnings per share for the quarters and six months ended March 31, 2023 and 2022:

(in millions, except per share data)For the Quarters Ended March 31,For the Six Months Ended March 31,
Basic net earnings per share2023202220232022
Net earnings$40.0 $19.0 $89.0 $79.0 
Mandatory preferred stock dividends— — — (4.0)
Net earnings attributable to common shareholders$40.0 $19.0 $89.0 $75.0 
Weighted average common shares outstanding - Basic71.5 70.4 71.4 68.6 
Basic net earnings per common share$0.56 $0.27 $1.25 $1.09 
Diluted net earnings per share
Weighted average common shares outstanding - Basic71.5 70.4 71.4 68.6 
Dilutive effect of RSU0.4 0.1 0.3 0.1 
Dilutive effect of performance shares0.5 0.1 0.5 0.2 
Dilutive effect of stock based deferred compensation plan— 0.1 0.1 0.1 
Dilutive effect of MCPS— 0.9 — — 
Weighted average common shares outstanding - Diluted72.4 71.6 72.3 69.0 
Diluted net earnings per common share$0.55 $0.27 $1.23 $1.09