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GOODWILL AND INTANGIBLE ASSETS AND LIABILITIES - Intangible Assets and Liabilities (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
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Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | $ 269 | $ 269
Finite-Lived Intangible Assets, Accumulated Amortization | (65) | (55)
Finite-Lived Intangible Assets, Net, Total | 204 | 214
Above-market supply contracts, Gross Amount | (71) | (71)
Above-market supply contracts, Accumulated Amortization | 23 | 19
Above-market supply contracts, Net | (48) | (52)
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 90 | 90
Finite-Lived Intangible Assets, Accumulated Amortization | (17) | (13)
Finite-Lived Intangible Assets, Net, Total | 73 | 77
Developed technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 60 | 60
Finite-Lived Intangible Assets, Accumulated Amortization | (13) | (10)
Finite-Lived Intangible Assets, Net, Total | 47 | 50
Trade names and trademarks |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 18 | 18
Finite-Lived Intangible Assets, Accumulated Amortization | (5) | (4)
Finite-Lived Intangible Assets, Net, Total | 13 | 14
Mining permits |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 72 | 72
Finite-Lived Intangible Assets, Accumulated Amortization | (28) | (27)
Finite-Lived Intangible Assets, Net, Total | 44 | 45
Supplier relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 29 | 29
Finite-Lived Intangible Assets, Accumulated Amortization | (2) | (1)
Finite-Lived Intangible Assets, Net, Total | $ 27 | $ 28

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