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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2024
Income Tax Disclosure [Abstract] |  |  |
Income tax expense | $ 5.4 | $ 13.0 |
Effective Income Tax Rate Reconciliation, Percent | 24.70% | 25.40% |
Deferred Tax Liabilities, Gross | $ 65.8 |  | $ 66.7
Deferred Tax Assets, Valuation Allowance | 0.8 |  | 0.8
Deferred tax liability, net | $ 66.6 |  | $ 67.5

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