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PROPERTY, PLANT AND EQUIPMENT - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Property, Plant and Equipment [Line Items] |  |  |
Depreciation | $ 903 | $ 932 | $ 988
Depletion | 29 | 33 | 38
Property, plant and equipment, net | 9,942 | 8,895 | $ 9,070
Right-of-use assets related to finance leases | 505 | 306 |
Operating lease, right-of-use asset | 351 | 228 |
Finance | 63 | 49 |
Operating | 50 | 41 |
Finance | 319 | 166 |
Operating | $ 275 | 197 |
Middletown |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Accelerated depreciation |  | 23 |
Indiana Harbor |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Accelerated depreciation |  | $ 68 |

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