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GOODWILL AND INTANGIBLE ASSETS AND LIABILITIES - Intangible Assets and Liabilities (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
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Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | $ 269 | $ 269
Finite-Lived Intangible Assets, Accumulated Amortization | (72) | (68)
Finite-Lived Intangible Assets, Net, Total | 197 | 201
Above-market supply contracts, Gross Amount | (71) | (71)
Above-market supply contracts, Accumulated Amortization | 25 | 24
Above-market supply contracts, Net | (46) | (47)
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 90 | 90
Finite-Lived Intangible Assets, Accumulated Amortization | (20) | (18)
Finite-Lived Intangible Assets, Net, Total | 70 | 72
Developed technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 60 | 60
Finite-Lived Intangible Assets, Accumulated Amortization | (15) | (14)
Finite-Lived Intangible Assets, Net, Total | 45 | 46
Trade names and trademarks |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 18 | 18
Finite-Lived Intangible Assets, Accumulated Amortization | (5) | (5)
Finite-Lived Intangible Assets, Net, Total | 13 | 13
Mining permits |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 72 | 72
Finite-Lived Intangible Assets, Accumulated Amortization | (28) | (28)
Finite-Lived Intangible Assets, Net, Total | 44 | 44
Supplier relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 29 | 29
Finite-Lived Intangible Assets, Accumulated Amortization | (4) | (3)
Finite-Lived Intangible Assets, Net, Total | $ 25 | $ 26

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