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COMMITMENTS AND CONTINGENCIES- Narrative (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Feb. 29, 2020 company
Loss Contingencies [Line Items] |  |  |  |  |
Accrual for environmental loss contingencies, number of companies negotiating consent decree | company |  |  |  |  | 3
Accrued probable future environmental expenditures | $ 157.2 | $ 118.3 | $ 124.5 | $ 119.7 |
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] | Accrued expenses and other current liabilities, Other non-current liabilities | Accrued expenses and other current liabilities, Other non-current liabilities |  |  |
Insurance recoveries | $ 1.7 | $ 8.3 | $ 4.5 |  |
Calvert City |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Accrued probable future environmental expenditures | $ 148.9 |  |  |  |

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