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Revenue
 12 Months Ended
Dec. 31, 2020
Text block [abstract]  
Revenue
      
UNITED STATES DOLLAR
 
      
2020
  2019  2018 
1.
  
REVENUE
             
   Revenue from contracts with customers  
 
3,892.1
 
  2,967.1   2,577.8 
   - Gold¹  
 
3,748.0
 
  2,802.0   2,408.6 
   - Copper²  
 
144.1
 
  165.1   169.2 
     
   
Disclosure of disaggregated revenue from contracts with customers
             
     
   The Group generates revenue primarily from the sale of gold bullion and copper concentrate to refineries and banks. All revenue from contracts with customers is recognised at a point in time. The Group also produces silver which is an insignificant
by-product.
             
     
   The disaggregation of revenue from contracts with customers by primary geographical market and product is described in the segment note (note 41).