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COMMITMENTS AND CONTINGENCIES (Details) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) | Feb. 29, 2020 company
Schedule of Equity Method Investments [Line Items] |  |  |  |
Accrual for environmental loss contingencies, number of companies negotiating consent decree | company |  |  |  | 3
Accrued probable future environmental expenditures | $ 151.7 |  | $ 157.2 |
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] | Accrued expenses and other current liabilities, Other Liabilities, Noncurrent |  | Accrued expenses and other current liabilities, Other Liabilities, Noncurrent |
Expense related to environmental activities | $ 4.0 | $ 1.4 |  |
Calvert City |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Accrued probable future environmental expenditures | $ 143.7 |  |  |

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