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CONTINGENT LIABILITIES AND ENVIRONMENTAL RESERVES - (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Oct. 31, 2024
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Site Contingency [Line Items] |  |
Environmental liability reserves | $ 17.3 | $ 16.5
Diamond Alkali |  |
Site Contingency [Line Items] |  |
Environmental liability reserves | 9.8 | 9.8
Other Facilities |  |
Site Contingency [Line Items] |  |
Environmental liability reserves | $ 7.5 | $ 6.7

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