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Schedule II: Valuation and Qualifying Accounts (Details) - Allowance for Doubtful Accounts - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Changes in valuation and qualifying accounts |  |  |
Balance at Beginning of Year | $ 104.0 | $ 92.8 | $ 77.9
Additions Charged to Cost of Revenue | 40.9 | 43.9 | 29.1
Deductions | (50.8) | (29.6) | (14.9)
Other and Foreign Exchange Impact | 0.1 | (3.1) | 0.7
Balance at the End of the Year | $ 94.2 | $ 104.0 | $ 92.8

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