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GOODWILL AND OTHER INTANGIBLE ASSETS - Intangible Assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Intangible assets other than goodwill [member]    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance $ 149 $ 149
Amortisation and impairment loss, intangible assets other than goodwill (1) 0
Intangible assets, ending balance 148 149
Water rights    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance 61 61
Amortisation and impairment loss, intangible assets other than goodwill 0 0
Intangible assets, ending balance 61 61
Water rights | Cost    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, ending balance 61  
Water rights | Accumulated amortization and impairment losses    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, ending balance 0  
Technology    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance 6 6
Amortisation and impairment loss, intangible assets other than goodwill (1) 0
Intangible assets, ending balance 5 6
Technology | Cost    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, ending balance 17  
Technology | Accumulated amortization and impairment losses    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, ending balance (12)  
Exploration potential    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, beginning balance 82 82
Amortisation and impairment loss, intangible assets other than goodwill 0 0
Intangible assets, ending balance 82 82
Exploration potential | Cost    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, ending balance 252  
Exploration potential | Accumulated amortization and impairment losses    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, ending balance (170)  
Intangible assets, beginning balance 149  
Intangible assets, ending balance 148 $ 149
Cost    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, ending balance 330  
Accumulated amortization and impairment losses    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets, ending balance $ (182)