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Common Shares
 3 Months Ended
Dec. 31, 2023
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]  
Common Shares COMMON SHARES
Reconciliations of weighted-average shares for basic and diluted earnings per common share follow. Earnings allocated to participating securities were inconsequential.
Three Months Ended
December 31,
 2022 2023 
Basic shares outstanding583.6 570.8 
Dilutive shares3.1 2.5 
Diluted shares outstanding586.7 573.3