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v3.20.1

Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2019
Intangible assets and goodwill [abstract] |
Disclosure of detailed information about key assumptions for the CGU's [Table Text Block] |
|  | 2019 |  |  | 2018 |
Long-term gold price (per ounce) |  | US$1,400 |  |  | US$1,300 |
Long-term silver price (per ounce) |  | US$18 |  |  | US$18 |
Post-tax real discount rate |  | 4.1% |  |  | 5.1% |

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