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Common Shares and Share-Based Compensation (Tables)
 9 Months Ended
Jun. 30, 2022
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,
 2021 2022 2021 2022 
Basic shares outstanding598.2 592.8 598.7 593.6 
Dilutive shares3.9 3.4 3.6 3.3 
Diluted shares outstanding602.1 596.2 602.3 596.9