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SUBSEQUENT EVENTS (Details) - USD ($) $ in Millions | Apr. 14, 2023 | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Subsequent Event [Line Items] |  |  |
Aggregate principal amount |  | $ 4,613 | $ 4,306
Subsequent Event | 6.750% 2030 Senior Notes | Cleveland-Cliffs Inc. |  |  |
Subsequent Event [Line Items] |  |  |
Aggregate principal amount | $ 750 |  |
Stated interest rate | 6.75% |  |

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