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Operating expenses, net (Tables) | 12 Months Ended
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Dec. 31, 2017
Minera Yanacocha SRL and subsidiary [member] |
Disclosure Of Detailed Information About Operating Expenses,net [Text Block] | This caption is made up as follows:
|  | 2017 |  | 2016 |  | 2015 |
|  | US$(000) |  | US$(000) |  | US$(000) |
Exploration and advanced projects |  |  | 51,694 |  |  | 49,580 |  |  | 64,230 |
Severance program |  |  | 9,419 |  |  | 9,659 |  |  | 14,904 |
Write-off of fixed assets |  |  | 1,368 |  |  | 14,036 |  |  | 2,411 |
Cost of fixed assets sold |  |  | 1,632 |  |  | 160 |  |  | 1,624 |
Income from fixed asset sales |  |  | (2,235) |  |  | (471) |  |  | (1,116) |
Others, net |  |  | 1,636 |  |  | (1,468) |  |  | 793 |
|  |  | 63,514 |  |  | 71,496 |  |  | 82,846 |

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