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Common Shares and Share-Based Compensation (Tables)
 9 Months Ended
Jun. 30, 2023
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]  
Schedule Of Basic And Diluted Earnings Per Share Reconciliation
Three Months Ended
June 30,		Nine Months Ended
June 30,
 2022 2023 2022 2023 
Basic shares outstanding592.8 570.9 593.6 575.1 
Dilutive shares3.4 3.1 3.3 3.0 
Diluted shares outstanding596.2 574.0 596.9 578.1