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Basis of Presentation and Accounting Policies - Narrative (Details) - USD ($) shares in Millions, $ in Millions | 3 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2024
Accounting Policies [Abstract] |  |  |
Allowance for doubtful accounts | $ 24.0 |  | $ 22.0
Antidilutive share-based compensation awards (in shares) | 0.7 | 0.5 |
Capital expenditures in accounts payable or other current liabilities at period end | $ 11.0 | $ 21.0 |
Outstanding purchase of common stock recorded in accounts payable | 1.0 | $ 1.0 |
Supplier finance program, obligation | $ 68.0 |  | $ 77.0

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