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Schedule of Accrued Liabilities (Details) - USD ($) $ in Millions | Jun. 30, 2021 | Sep. 30, 2020
--- | --- | ---
Other current liabilities: |  |
Compensation and benefits | $ 38.9 | $ 32.8
Customer rebates | 16.0 | 9.6
Warranty | 3.1 | 7.2
Deferred Revenue | 7.4 | 5.6
Customer Refund Liability, Current | 5.5 | 4.3
Accrual for Taxes Other than Income Taxes | 4.7 | 3.9
Operating lease liability, current | 3.8 | 4.0
Workers' Compensation Liability, Current | 3.6 | 2.7
CARES Act deferral, current portion | 3.6 | 0.0
Restructuring reserve, current | 2.6 | 2.8
Environmental | 1.2 | 1.2
Interest Payable | 1.7 | 7.3
Accrued Income Taxes | 0.0 | 0.2
Other Liabilities, Current | 9.2 | 5.0
Accrued liabilities | 101.3 | 86.6
Other Liabilities, Noncurrent [Abstract] |  |
Operating lease liability, noncurrent | 21.8 | 23.3
Standard Product Warranty Accrual, Noncurrent | 8.0 | 7.2
CARES Act Deferrals | 3.6 | 3.3
Transition Tax Liability | 4.7 | 5.2
Unrecognized Tax Benefits | 5.0 | 4.5
New market tax credit liabilities | 3.9 | 0.0
Workers' Compensation Liability, Noncurrent | 8.5 | 3.8
Asset Retirement Obligation | 3.6 | 3.5
Grant yet to be earned | 2.5 | 2.5
Other Accrued Liabilities, Noncurrent | 3.2 | 3.0
Other Liabilities, Noncurrent, Total | $ 64.8 | $ 56.3

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