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v3.21.1

Mining concessions, development costs, right-of-use asset, property, plant and equipment, net - Additional information (Details) - USD ($) $ in Thousands | 12 Months Ended | 48 Months Ended |
--- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2016 | Dec. 31, 2020
Property, plant and equipments,net [Line Items] |  |  |
Impairment loss | $ 0 |  |
Yanacocha | Minimum |  |  |
Property, plant and equipments,net [Line Items] |  |  |
Discount rate used in current estimate of fair value |  |  | 8.90%
Yanacocha | Maximum |  |  |
Property, plant and equipments,net [Line Items] |  |  |
Discount rate used in current estimate of fair value |  |  | 9.40%
Conga | Minimum |  |  |
Property, plant and equipments,net [Line Items] |  |  |
Discount rate used in current estimate of fair value |  |  | 9.38%
Conga | Maximum |  |  |
Property, plant and equipments,net [Line Items] |  |  |
Discount rate used in current estimate of fair value |  |  | 10.36%
Yanacocha mine [Member] |  |  |
Property, plant and equipments,net [Line Items] |  |  |
Impairment loss | $ 933,200 | $ 1,342,645 |

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