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MINERAL PROPERTIES AND PROPERTY, PLANT AND EQUIPMENT (Narrative) (Details)
$ in Millions, $ in Millions
 12 Months Ended
Apr. 01, 2024
USD ($)
Apr. 01, 2024
AUD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Disclosure of detailed information about property, plant and equipment [line items]        
Carrying value of right-of-use assets     $ 66.3 $ 56.1
Depletion and depreciation, right-of-use     15.0 13.9
Non Depletable [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Exploration and evaluation assets     97.8 88.5
Property, plant and equipment [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Depletion and depreciation, right-of-use     15.5 $ 16.2
Seguela Project [Member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Capitalized interest     $ 6.5  
NSR royalty, percentage 1.20% 1.20%    
Half of NSR royalty purchase price, per agreement $ 6.5 $ 10