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Share-Based Compensation (Summary of Stock Option Activity) (Details)
shares in Thousands
12 Months Ended
Sep. 30, 2023
$ / shares
shares
Shares  
Outstanding, beginning (shares) | shares 564
Exercised (shares) | shares (270)
Outstanding, ending (shares) | shares 294
Exercisable (shares) | shares 294
Weighted Average Exercise Price  
Outstanding, beginning (in dollars per share) | $ / shares $ 106.13
Exercised (in dollars per share) | $ / shares 90.57
Outstanding, ending (in dollars per share) | $ / shares 120.42
Exercisable (in dollars per share) | $ / shares $ 120.42