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COST OF SALES (Tables)
 12 Months Ended
Dec. 31, 2021
Cost of sales [Abstract]  
Schedule of cost of sales
   Gold Copper
Other4
 Total
For the years ended December 31 2021 2020 2021 2020 2021 2020 2021 2020
Site operating cost1,2,3
 $4,218  $4,421  $266  $292  $—  $3  $4,484  $4,716 
Depreciation1
 1,889  1,975  197  208  16  25  2,102  2,208 
Royalty expense 371  410  103  54  —  —  474  464 
Community relations 26  26  3  2  —  1  29  29 
Total $6,504  $6,832  $569  $556  $16  $29  $7,089  $7,417 
1Site operating costs and depreciation include charges to reduce the cost of inventory to net realizable value of $22 million (2020: $29 million). Refer to note 17.
2Site operating costs includes the costs of extracting by-products.
3Includes employee costs of $1,396 million (2020: $1,520 million).
4Other includes corporate amortization.