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Trade and other receivables, net (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Trade and other receivables, net [Line Items] |
Trade and other receivables [Text Block] |
| (a) | Trade and other receivables, net
|  | 2018 |  |  | 2017 |
|  | US$(000) |  |  | US$(000) |
Trade receivables, net (b) |  |  |  |  |  |  |  |
Domestic clients |  |  | 105,225 |  |  |  | 109,543 |
Foreign clients |  |  | 56,312 |  |  |  | 119,388 |
Related entities, note 30(b) |  |  | 7,177 |  |  |  | 7,348 |
|  |  | 168,714 |  |  |  | 236,279 |
Allowance for expected credit losses (f) |  |  | (22,013 | ) |  |  | (22,823 | )
|  |  | 146,701 |  |  |  | 213,456 |
Other receivables |  |  |  |  |  |  |  |
Value added tax credit |  |  | 49,332 |  |  |  | 74,785 |
Accounts receivables to third parties |  |  | 24,625 |  |  |  | 27,859 |
Advances to suppliers |  |  | 7,542 |  |  |  | 1,977 |
Refund applications of value added tax (c) |  |  | 6,574 |  |  |  | 18,450 |
Tax deposits (d) |  |  | 4,769 |  |  |  | 9,733 |
Account receivables from hedges derivatives |  |  | 3,949 |  |  |  | 2,300 |
Related entities, note 30(b) |  |  | 3,705 |  |  |  | 732 |
Interest receivables |  |  | 3,000 |  |  |  | 1,719 |
Restricted bank accounts (e) |  |  | 2,782 |  |  |  | 2,372 |
Due from for sales of assets |  |  | 2,715 |  |  |  | 5,371 |
Tax claims |  |  | 2,573 |  |  |  | 2,300 |
Loans to personal |  |  | 1,392 |  |  |  | 1,179 |
Insurance claim (g) |  |  | - |  |  |  | 3,716 |
Other minor |  |  | 2,738 |  |  |  | 1,911 |
Allowance for expected credit losses (f) |  |  | (10,089 | ) |  |  | (9,361 | )
|  |  | 105,607 |  |  |  | 145,043 |
Total trade and other receivables, net |  |  | 252,308 |  |  |  | 358,499 |
Classification by maturity: |  |  |  |  |  |  |  |
Current portion |  |  | 211,715 |  |  |  | 314,308 |
Non-current portion |  |  | 40,593 |  |  |  | 44,191 |
Total trade and other receivables, net |  |  | 252,308 |  |  |  | 358,499 |
Classification by nature: |  |  |  |  |  |  |  |
Financial receivables |  |  | 196,402 |  |  |  | 265,264 |
Non-financial receivables |  |  | 55,906 |  |  |  | 93,235 |
Total trade and other receivables, net |  |  | 252,308 |  |  |  | 358,499 |
Classification by measurement : |  |  |  |  |  |  |  |
Trade receivables (without provisional prices) |  |  | 39,152 |  |  |  | 61,188 |
Trade receivables (with provisional prices) |  |  | 107,549 |  |  |  | 152,268 |
Other accounts receivables |  |  | 105,607 |  |  |  | 145,043 |
Total trade and other receivables, net |  |  | 252,308 |  |  |  | 358,499 |
| (b) | Trade accounts receivable are denominated in U.S. dollars, are neither due nor impaired, do not yield interest and have no specific guarantees.
| (c) | This item mainly corresponds current year applications that have been refunded during 2018.
| (d) | Corresponds to deposits held in the Peruvian State bank which only can be used to offset tax obligations that companies have with the Tax Authorities.
| (e) | These balances correspond to restricted bank accounts for payment of financial obligations held by the subsidiary Empresa de Generación Huanza S.A. (hereafter “Huanza”), according to the finance lease signed with Banco de Crédito del Perú in 2009. Below is presented the movement:
Disclosure of Detailed information about allowance for doubtful accounts. [Text Block] | Below is presented the movement in the allowance for expected credit losses:
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | US$(000) |  |  | US$(000) |  |  | US$(000) |
Beginning balance |  |  | 32,184 |  |  |  | 31,607 |  |  |  | 26,520 |
Provision for other receivable, note 26 |  |  | 1,334 |  |  |  | - |  |  |  | - |
Provision for trade receivables, note 24 |  |  | 18 |  |  |  | 676 |  |  |  | 5,087 |
Provision of the period |  |  | 1,352 |  |  |  | 676 |  |  |  | 5,087 |
Write off of the period |  |  | (410 | ) |  |  | - |  |  |  | - |
Exchange difference |  |  | (173 | ) |  |  | - |  |  |  | - |
Reversals of the period, note 26 |  |  | (45 | ) |  |  | (99 | ) |  |  | - |
Other minor |  |  | (806 | ) |  |  | - |  |  |  | - |
Final balance |  |  | 32,102 |  |  |  | 32,184 |  |  |  | 31,607 |
Trade receivables |  |  | 22,013 |  |  |  | 22,823 |  |  |  | 22,644 |
Other receivables |  |  | 10,089 |  |  |  | 9,361 |  |  |  | 8,963 |
|  |  | 32,102 |  |  |  | 32,184 |  |  |  | 31,607 |
Disclosure of Restricted Bank Accounts for payments of Financial Obligation explanatory [Table Text Block] | Below is presented the movement:
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | US$(000) |  |  | US$(000) |  |  | US$(000) |
Beginning balance |  |  | 2,372 |  |  |  | 2,087 |  |  |  | - |
Increase in restricted bank accounts |  |  | 410 |  |  |  | 285 |  |  |  | 2,087 |
Final balance |  |  | 2,782 |  |  |  | 2,372 |  |  |  | 2,087 |
Minera Yanacocha SRL and subsidiary [Member] |
Disclosure of Trade and other receivables, net [Line Items] |
Disclosure of detailed information about trade and other receivables [Text Block] |
| (a) | This caption is made up as follows:
|  | 2018 |  |  | 2017 |
|  | US$(000) |  |  | US$(000) |
Trade receivables, net |  |  |  |  |  |  |  |
Foreign clients |  |  | 7,389 |  |  |  | 1,032 |
Other receivables |  |  |  |  |  |  |  |
Advances to suppliers |  |  | 16,897 |  |  |  | 20,724 |
Tax claims |  |  | 3,532 |  |  |  | 10,211 |
Credit of tax on net assets |  |  | 23,290 |  |  |  | 11,520 |
Other |  |  | 5,382 |  |  |  | 4,032 |
Related entities, note 22(b) |  |  | 794 |  |  |  | 2,185 |
|  |  | 49,895 |  |  |  | 48,672 |
Allowance for doubtful accounts (b) |  |  | (1,384 | ) |  |  | (1,384 | )
|  |  | 48,511 |  |  |  | 47,288 |
Total trade and other receivables, net |  |  | 55,900 |  |  |  | 48,320 |
|  | 2018 |  |  | 2017 |
|  | US$(000) |  |  | US$(000) |
By maturity: |  |  |  |  |  |  |  |
Current |  |  | 32,610 |  |  |  | 36,800 |
Non current |  |  | 23,290 |  |  |  | 11,520 |
Total |  |  | 55,900 |  |  |  | 48,320 |
Disclosure of Detailed information about allowance for doubtful accounts. [Text Block] |
| (b) | The allowance for doubtful accounts had the following movement during the years 2018, 2017 and 2016:
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | US$(000) |  |  | US$(000) |  |  | US$(000) |
Opening balance |  |  | 1,384 |  |  |  | 1,407 |  |  |  | 1,444 |
Deductions |  |  | - |  |  |  | (23 | ) |  |  | (37 | )
Ending balance |  |  | 1,384 |  |  |  | 1,384 |  |  |  | 1,407 |

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