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Supplemental Balance Sheet Information (Schedule of Accrued Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Sep. 30, 2023
--- | --- | ---
Other current liabilities: |  |
Compensation and benefits | $ 25.3 | $ 33.8
Customer rebates | 18.0 | 14.6
Accrued Income Taxes | 15.2 | 8.5
Warranty accrual | 10.0 | 8.6
Deferred Revenue | 8.4 | 9.2
Customer Refund Liability, Current | 6.3 | 6.7
Accrual for Taxes Other than Income Taxes | 0.7 | 2.0
Operating lease liability, current | 5.3 | 4.9
Workers' Compensation Liability, Current | 4.3 | 4.0
Restructuring reserve, current | 7.8 | 6.6
Interest Payable | 0.8 | 5.3
Other Liabilities, Current | 10.0 | 11.0
Accrued liabilities | 112.1 | 115.2
Other Liabilities, Noncurrent [Abstract] |  |
Operating lease liability, noncurrent | 25.8 | 19.8
Product Warranty Accrual, Noncurrent | 6.7 | 7.1
Transition Tax Liability | 3.1 | 3.1
Unrecognized Tax Benefits | 3.7 | 5.0
New market tax credit liabilities | 3.9 | 3.9
Workers' Compensation Liability, Noncurrent | 5.6 | 5.9
Accrued Environmental Loss Contingencies, Noncurrent | 4.2 | 4.2
Grant yet to be earned | 2.5 | 2.5
Other Accrued Liabilities, Noncurrent | 2.6 | 2.7
Other Liabilities, Noncurrent, Total | $ 58.1 | $ 54.2

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