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Tahoe Acquisition - Estimated Future Metal Prices (Details) - Weighted average [member] | Dec. 31, 2019 $ / Ounce | Feb. 22, 2019 $ / tonne $ / Ounce | Dec. 31, 2018 $ / Ounce
--- | --- | --- | ---
Gold, Ounces |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Commodity Prices | 1,474 |  | 1,300
Silver, Ounces |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Commodity Prices | 17.94 |  | 17.07
2019-2022 [member] | Gold, Ounces | Tahoe Resources, Inc [member] |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Commodity Prices |  | 1,300 |
2019-2022 [member] | Silver, Ounces | Tahoe Resources, Inc [member] |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Commodity Prices |  | 17.07 |
2019-2022 [member] | Zinc [member] | Tahoe Resources, Inc [member] |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Commodity Prices | $ / tonne |  | 2,599 |
2019-2022 [member] | Lead [member] | Tahoe Resources, Inc [member] |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Commodity Prices | $ / tonne |  | 2,171 |
2023 onward [member] | Gold, Ounces | Tahoe Resources, Inc [member] |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Commodity Prices |  | 1,300 |
2023 onward [member] | Silver, Ounces | Tahoe Resources, Inc [member] |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Commodity Prices |  | 18.50 |
2023 onward [member] | Zinc [member] | Tahoe Resources, Inc [member] |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Commodity Prices | $ / tonne |  | 2,600 |
2023 onward [member] | Lead [member] | Tahoe Resources, Inc [member] |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Commodity Prices | $ / tonne |  | 2,200 |

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