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IMPAIRMENT AND REVERSAL OF NON-CURRENT ASSETS (Tables)
 12 Months Ended
Dec. 31, 2020
Impairment Of Assets [Abstract]  
Summary of impairments (reversals) [Text Block]
For the year ended December 31, 2020, we recorded net impairment reversals of $269 million (2019: net impairment reversals of $1,423 million) for non-current assets, as summarized in the following table:
For the years ended December 31 2020 2019
Tanzania ($304) $— 
Cortez 10  57 
Pueblo Viejo 5  (865)
Lumwana —  (947)
Pascua-Lama —  296 
Lagunas Norte —  12 
Golden Sunlight —  9 
Veladero —  3 
Intangible assets 12  — 
Other 8  12 
Total impairment (reversals) losses of long-lived assets ($269) ($1,423)
Impairment testing assumptions [Text Block] The other key assumptions used in our impairment testing, based on the CGUs tested in each year, are summarized in the table below: 
2020 2019
Copper price per lb (long-term) $3.00 $3.00
WACC - gold (range) 3%-12% 3%-7%
WACC - gold (avg) 5  % 4  %
WACC - copper n/a n/a
NAV multiple - gold (avg) 1.3 1.2
LOM years - gold (avg) 20 19
Carrying value of CGU's [Text Block]
The carrying value of the CGUs that are most sensitive to changes in the key assumptions used in the FVLCD calculation are: 
As at December 31, 2020 Carrying Value
Loulo-Gounkoto $4,187 
Veladero 779