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PROPERTY, PLANT AND EQUIPMENT - Mineral Property Costs Not Subject to Depreciation (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment (note 19) $ 24,628 $ 24,141 $ 12,826
MIning property costs not subject to depreciation      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment (note 19) 3,586 4,100 $ 2,968
MIning property costs not subject to depreciation | Norte Abierto Project      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment (note 19) 653 649  
MIning property costs not subject to depreciation | Donlin Gold      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment (note 19) 198 184  
MIning property costs not subject to depreciation | Pascua-Lama      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment (note 19) 741 754  
Construction-in-progress      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment (note 19) 1,208 1,009  
Acquired mineral resources and exploration potential      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment (note 19) $ 786 $ 1,504