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Provisions and contingent liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Disclosure of provisions [Line Items] |  |  |  |
Provision for closure of mining units and exploration projects | $ 225,877 | $ 200,183 | $ 206,462 |
Provision for bonus to employees and officers | 18,620 | 2,331 |  |
Workers' profit sharing payable | 1,772 | 3,569 |  |
Provision for environmental liabilities | 3,768 | 5,534 |  |
Provision for obligations with communities | 5,878 | 19,376 |  |
Provision for labor contingencies | 4,042 | 2,963 |  |
Provision for safety contingencies | 4,877 | 3,898 |  |
Board of Directors' participation | 2,108 | 1,273 |  |
Provision for environmental contingencies | 234 | 1,233 |  |
Other provisions | 758 | 1,364 |  |
Provisions | 267,934 | 241,724 |  |
Classification by maturity [Abstract] |  |  |  |
Current provisions | 68,172 | 76,847 |  |
Non-current Portion | 199,762 | 164,877 |  |
Provisions | 267,934 | 241,724 |  |
Provision for remediation and mine closure [Member] |  |  |  |
Non-current provisions [abstract] |  |  |  |
Other non-current provisions | 131,888 | 156,859 | 153,313 | $ 161,270
Minera Yanacocha SRL and subsidiary [member] |  |  |  |
Disclosure of provisions [Line Items] |  |  |  |
Provision for closure of mining units and exploration projects | 1,294,464 | 1,234,731 | $ 1,012,888 | $ 578,959
Provision for social responsability | 18,010 | 21,689 |  |
Accrual of operating costs | 11,442 | 15,064 |  |
Workers' profit sharing payable | 3,920 | 1,733 |  |
Provisions for Accruals Of Capital Expenditures | 3,682 | 1,840 |  |
Other provisions | 2,785 | 1,403 |  |
Provisions | 1,334,303 | 1,276,460 |  |
Classification by maturity [Abstract] |  |  |  |
Current provisions | 41,154 | 39,495 |  |
Non-current Portion | 1,293,149 | 1,236,965 |  |
Provisions | 1,334,303 | 1,276,460 |  |
Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Current provisions [abstract] |  |  |  |
Other current provisions | 15,357 | 19,202 |  |
Non-current provisions [abstract] |  |  |  |
Other non-current provisions | 342,331 | 313,663 |  |
Sociedad Minera Cerro Verde S.A.A. [Member] | Provision for social commitments [Member] |  |  |  |
Current provisions [abstract] |  |  |  |
Other current provisions | 1,815 | 2,767 |  |
Sociedad Minera Cerro Verde S.A.A. [Member] | Provisions related to services and freight not invoiced [Member] |  |  |  |
Current provisions [abstract] |  |  |  |
Other current provisions | 11,823 | 14,513 |  |
Sociedad Minera Cerro Verde S.A.A. [Member] | Provision for remediation and mine closure [Member] |  |  |  |
Current provisions [abstract] |  |  |  |
Other current provisions | 0 | 690 |  |
Non-current provisions [abstract] |  |  |  |
Other non-current provisions | 131,888 | 156,169 |  |
Sociedad Minera Cerro Verde S.A.A. [Member] | Legal proceedings provision [member] |  |  |  |
Current provisions [abstract] |  |  |  |
Other current provisions | 1,719 | 1,232 |  |
Sociedad Minera Cerro Verde S.A.A. [Member] | Miscellaneous other provisions [member] |  |  |  |
Non-current provisions [abstract] |  |  |  |
Other non-current provisions | 11,033 | 15,889 |  |
Sociedad Minera Cerro Verde S.A.A. [Member] | Provision for royalties and mining tax [Member] |  |  |  |
Non-current provisions [abstract] |  |  |  |
Other non-current provisions | 191,299 | 133,376 |  |
Sociedad Minera Cerro Verde S.A.A. [Member] | Provision for interest [Member] |  |  |  |
Non-current provisions [abstract] |  |  |  |
Other non-current provisions | $ 8,111 | $ 8,229 |  |

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