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Financial - risk management objectives and policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of financial risk management objectives and policies [Line Items] |
Disclosure of foreign-currency exchange rates risk [Text Block] | A table showing the effect on results of a reasonable change in foreign-currency exchange rates is presented below, with all other variables kept constant:
|  | Exchange-rate |  | Effect on profit (loss) |
|  | increase/decrease |  | before income tax |
|  |  |  | US$(000) |
2017 |  |  |  |  |  |  |
Exchange rate |  |  | +10 | % |  | 2,474 |
Exchange rate |  |  | -10 | % |  | (2,459) |
2016 |  |  |  |  |  |  |
Exchange rate |  |  | +10 | % |  | (924) |
Exchange rate |  |  | -10 | % |  | 926 |
2015 |  |  |  |  |  |  |
Exchange rate |  |  | +10 | % |  | 6,233 |
Exchange rate |  |  | -10 | % |  | (7,618) |
Disclosure of interest rates risk [Text Block] | A table showing the effect in profit or loss of the variations of interest rates:
|  | Increase/decrease |  |  |
|  | of Libor rate |  | Effect on results |
|  | (percentage rates) |  | US$(000) |
2017 |  |  |  |  |  |  |
Interest rate |  |  | +10 |  |  | (677) |
Interest rate |  |  | -10 |  |  | 677 |
2016 |  |  |  |  |  |  |
Interest rate |  |  | +10 |  |  | 333 |
Interest rate |  |  | -10 |  |  | (333) |
2015 |  |  |  |  |  |  |
Interest rate |  |  | +10 |  |  | 294 |
Interest rate |  |  | -10 |  |  | (294) |
Disclosure of financial liabilities by remaining maturity [Text Block] | An analysis of the Group’s financial liabilities classified according to their aging is presented below, based on undiscounted contractual payments:
|  | Less than |  | Between 1 |  | Between 2 |  | More than 5 |  |  |
|  | 1 year |  | and 2 years |  | and 5 years |  | years |  | Total |
|  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |
As of December 31,2017 - |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bank loans |  |  | 96,580 |  |  | - |  |  | - |  |  | - |  |  | 96,580 |
Trade and other payables |  |  | 219,379 |  |  | 663 |  |  | - |  |  | - |  |  | 220,042 |
Derivative financial instruments |  |  | 28,705 |  |  | - |  |  | - |  |  | - |  |  | 28,705 |
Financial obligation |  |  | 110,062 |  |  | 148,718 |  |  | 449,689 |  |  | - |  |  | 708,469 |
Contingent consideration liability |  |  | - |  |  | - |  |  | 9,280 |  |  | 28,469 |  |  | 37,749 |
Total |  |  | 454,726 |  |  | 149,381 |  |  | 458,969 |  |  | 28,469 |  |  | 1,091,545 |
As of December 31,2016 - |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bank loans |  |  | 55,000 |  |  | - |  |  | - |  |  | - |  |  | 55,000 |
Trade and other payables |  |  | 253,062 |  |  | - |  |  | - |  |  | 15,982 |  |  | 269,044 |
Derivative financial instruments |  |  | 3,863 |  |  | - |  |  | - |  |  | - |  |  | 3,863 |
Embedded derivative for sale of concentrates |  |  | 1,524 |  |  | - |  |  | - |  |  | - |  |  | 1,524 |
Financial obligation |  |  | 70,420 |  |  | 113,070 |  |  | 503,029 |  |  | - |  |  | 686,519 |
Contingent consideration liability |  |  | - |  |  | 3,305 |  |  | 6,603 |  |  | 32,840 |  |  | 42,748 |
Total |  |  | 383,869 |  |  | 116,375 |  |  | 509,632 |  |  | 48,822 |  |  | 1,058,698 |
Minera Yanacocha SRL and subsidiary [Member] |
Disclosure of financial risk management objectives and policies [Line Items] |
Disclosure of detailed information about current financial liabilities [text block] | The following table represents the analysis of the Company's financial liabilities, considering the remaining period to reach such maturity as of the consolidated statement of financial position date (see note 11):
|  | 2017 |  | 2016 |
|  | Less than 1 year |  | Less than 1 year |
|  | US$(000) |  | US$(000) |
Trade accounts payable |  |  | 43,108 |  |  | 44,634 |
Accounts payable to related parties |  |  | 9,962 |  |  | 9,052 |
Remuneration and similar benefits payable |  |  | 27,419 |  |  | 8,516 |
|  |  | 80,489 |  |  | 62,202 |

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