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Operating expenses, net (Details) - Minera Yanacocha SRL and subsidiary [Member] - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of Operating Expenses [line items] |  |  |
Operating expenses, net | $ 34,322 | $ 35,987 | $ 76,155
Exploration and advanced projects [Member] |  |  |
Disclosure of Operating Expenses [line items] |  |  |
Operating expenses, net | 19,279 | 33,669 | 62,643
Severance program [Member] |  |  |
Disclosure of Operating Expenses [line items] |  |  |
Operating expenses, net | 4,454 | 2,210 | 8,678
Social responsibility commitments |  |  |
Disclosure of Operating Expenses [line items] |  |  |
Operating expenses, net | 6,730 | 250 |
Cost of fixed assets sold [Member] |  |  |
Disclosure of Operating Expenses [line items] |  |  |
Operating expenses, net | 30 | 2,092 | 5,445
Tax fine [Member] |  |  |
Disclosure of Operating Expenses [line items] |  |  |
Operating expenses, net | 11 | 2,019 | 3,954
Write-off of fixed assets [Member] |  |  |
Disclosure of Operating Expenses [line items] |  |  |
Operating expenses, net | 460 | 1,204 |
Income from fixed asset sales [Member] |  |  |
Disclosure of Operating Expenses [line items] |  |  |
Operating expenses, net | (40) | (8,088) | (4,821)
Others, net [Member] |  |  |
Disclosure of Operating Expenses [line items] |  |  |
Operating expenses, net | $ 3,398 | $ 2,631 | $ 256

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