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Goodwill (Tables)
12 Months Ended
Dec. 31, 2021
Changes in goodwill [abstract]  
Summary of key assumptions used for assessing the recoverable amount of goodwill
20212020
Gold price ($/oz)
$1,800-$1,550
$1,850 - $1,550
Discount rate
5% - 6%
5% - 6%