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Accrued Liabilities (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Payables and Accruals [Abstract] |  |
Accrued benefits | $ 21.6 | $ 29.7
Current portion of postretirement benefit obligation | 2.4 | 2.4
Other taxes payable | 12.8 | 9.8
Current portion of black lung liability | 5.9 | 5.9
Accrued legal | 0.6 | 4.9
Accrued losses on purchase commitments | 6.0 | 0.0
Other | 5.6 | 8.1
Total accrued liabilities | $ 54.9 | $ 60.8

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- Definition Carrying value as of the balance sheet date of obligations, excluding pension and other postretirement benefits, incurred through that date and payable for perquisites provided to employees pertaining to services received from them. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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