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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Accrued probable future environmental expenditures | $ 117.2 |  | $ 117.2 |  | $ 118.3
Expense related to environmental activities | $ 13.0 | $ 3.0 | $ 14.4 | $ 5.0 |
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 |  | Accrued expenses and other current liabilities, Other Liabilities, Noncurrent
Calvert City |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Accrued probable future environmental expenditures | $ 107.9 |  | $ 107.9 |  |

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