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Other Income (Expense) (Tables) | 12 Months Ended
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Sep. 30, 2024
Other Income and Expenses [Abstract] |
Components of Other (Expense) Income | The components of Other income (expense) were (in millions):
|  | 2024 |  | 2023 |  | 2022
Interest income |  | $ | 15.6 |  |  | $ | 9.7 |  |  | $ | 4.4 |
Royalty income |  | 11.3 |  |  | 13.2 |  |  | 10.9 |
Legacy product liability and environmental charges |  | (20.5) |  |  | (18.1) |  |  | (15.6) |
Non-operating pension and postretirement benefit credit (cost) |  | 19.8 |  |  | (82.7) |  |  | (4.7) |
Fair value adjustments for earnout payments (Note 4) |  | 30.7 |  |  | — |  |  | — |
Other |  | 5.9 |  |  | 6.6 |  |  | 3.4 |
Other income (expense) |  | $ | 62.8 |  |  | $ | (71.3) |  |  | $ | (1.6) |

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