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Commitments and contingencies - Additional information (Details) |  | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |
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Jan. 05, 2021 PEN (S/) installment | Jun. 23, 2004 | Dec. 31, 2020 PEN (S/) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 PEN (S/) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2015 PEN (S/) | Dec. 31, 2015 USD ($) | Dec. 31, 2021 PEN (S/) | Dec. 31, 2021 USD ($) | Jan. 05, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 14, 2020 PEN (S/) | Dec. 14, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 20, 2019 PEN (S/) | Dec. 20, 2019 USD ($) | Sep. 30, 2019 PEN (S/) | Sep. 30, 2019 USD ($) | Dec. 31, 2018 PEN (S/) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 PEN (S/) | Dec. 31, 2014 USD ($) | Dec. 31, 2012 PEN (S/) | Dec. 31, 2012 USD ($)
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent liability |  |  | S/ 43,462,000 |  |  |  |  |  |  |  |  |  | $ 11,993,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recoverability of litigation amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 190,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Declared tax deductions not recognized |  |  |  |  |  |  |  |  |  |  |  |  | 1,100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of material leasing arrangements by lessor classified as operating lease |  |  | Legal procedures -Buenaventura - | Legal procedures -Buenaventura - |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax expense (income), continuing operations |  |  |  | $ 25,430,000 |  | $ (25,590,000) | $ 26,879,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SUNAT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax assessment value | S/ 1,505,948,000 |  |  |  |  |  |  |  |  |  |  | $ 415,549,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of equal monthly payments | installment | 66 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for collection of doubtful debts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 29,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Loss contingencies, laws affected |  |  | The Peruvian Agency in charge of conducting environmental evaluations and audits is the OEFA, the Environmental Assessment and Enforcement Agency, this institution conducts periodic supervision of the Yanacocha mine. From 2011 to 2020, the OEFA issued notifications of alleged breaches of Yanacocha's environmental standards and environmental management instruments, related to past supervisions. OEFA has resolved identified findings that do not translate into environmental deterioration as a result of some bad practice in the Yanacocha operation. The experience with OEFA, in the case of finding administrative responsibility to Yanacocha, results in a corrective action, in addition to imposing a fine that is calculated by the avoided cost capitalized on the date of issuance of the directorial resolution, multiplied by potential factors of environmental impact. The presumed offenses identified by the OEFA currently range from zero to 33,676 | The Peruvian Agency in charge of conducting environmental evaluations and audits is the OEFA, the Environmental Assessment and Enforcement Agency, this institution conducts periodic supervision of the Yanacocha mine. From 2011 to 2020, the OEFA issued notifications of alleged breaches of Yanacocha's environmental standards and environmental management instruments, related to past supervisions. OEFA has resolved identified findings that do not translate into environmental deterioration as a result of some bad practice in the Yanacocha operation. The experience with OEFA, in the case of finding administrative responsibility to Yanacocha, results in a corrective action, in addition to imposing a fine that is calculated by the avoided cost capitalized on the date of issuance of the directorial resolution, multiplied by potential factors of environmental impact. The presumed offenses identified by the OEFA currently range from zero to 33,676 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax expense (income), continuing operations |  |  |  | $ 53,018,000 |  | 64,928,000 | $ 29,297,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for tax Dispute related to the amortization of the contractual rights |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 29,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Maximum amount of potential excessive interest against which the company has filed an objection |  |  |  |  |  |  |  |  |  |  |  |  | 60,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum amount of duplicity of criteria against which the company has filed an objection |  |  |  |  |  |  |  |  |  |  |  |  | 81,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] | Los Tapados S.A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty rate on net sales |  |  | 3.00% | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minera Yanacocha S.R.L |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Open tax procedure | SUNAT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collection of debt forced amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | S/ 120,262,000 | $ 33,240,000 |  |  |  |  |  |  |  |  |  |
Appeal Proceedings Provision for collection of Doubtful Debt and Unfounded Income Case [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for collection of doubtful debts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | S/ 70,277,000 | $ 19,378,000 |  |  |  |  |  |
Provision for tax Dispute related to the amortization of the contractual rights |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 70,277,000 | 19,378,000 |  |  |  |  |  |
Legal Proceedings [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent liability |  |  |  |  |  |  |  |  |  |  |  |  | 5,400,000 |  |  | 3,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Tax year 2009 and 2010 | Open tax procedure | SUNAT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Declared tax deductions not recognized |  |  |  |  |  |  |  | S/ 76,023,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 20,978,000 |  |  |  |
Compensation of tax losses |  |  |  |  |  |  |  | 561,758,000 | $ 155,010,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax year 2014 [Member] | Open tax procedure | SUNAT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Declared tax deductions not recognized |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | S/ 94,898,000 | $ 26,186,000 |  |  |  |  |  |
Year 2007 [Member] | Open tax procedure | SUNAT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Declared tax deductions not recognized |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | S/ 1,056,310,000 | $ 291,476,000
Year 2008 [Member] | Open tax procedure | SUNAT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Declared tax deductions not recognized |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | S/ 1,530,985,000 | $ 422,457,000 |  |
Year 2009 [Member] | SUNAT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collection of debt forced amount |  |  |  |  |  |  |  |  |  | S/ 18,807,000 | $ 5,190,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  | S/ 202,614,000 | $ 55,909,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Empresa de Generacin Huanza S.A |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent liability |  |  | S/ 7,532,000 |  | S/ 6,999,000 |  |  |  |  |  |  |  | $ 2,080,000 |  |  | $ 2,071,000 |  |  |  |  |  |  |  |  |  |  |  |
Empresa de Generacin Huanza S.A | Tax year 2014 [Member] | SUNAT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized Depreciation expense |  |  |  |  |  |  |  | S/ 27,532,000 | $ 7,597,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rio Seco |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collection of debt forced amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | S/ 11,153,000 | $ 3,279,000 |  |  |  |  |  |  |  |
Rio Seco | Omission of Payment of General Sales Tax [Member] | SUNAT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | S/ 1,815,000 | $ 501,000
San Jose Reservoir Trust [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding commitments made by entity, related party transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,321,000 |  |  |  |  |
Other Subsidiaries [Member] | SUNAT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax expense (income), continuing operations |  |  | 9,485,000 | $ 2,617,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minera La Zanja S.R.L. [Member] | Tax year 2013 and 2015 | SUNAT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disallowance of development cost |  |  | S/ 3,185,000 | $ 879,000 | S/ 2,952,000 | $ 815,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sindicato Minero de Orcopampa S.A., note 29(b) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease concession expense, Percent |  |  | 10.00% | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
S.M.R.L. Chaupiloma Dos de Cajamarca [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty rate on net sales |  |  | 3.00% | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum | Cerro Verde [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty rate on net sales |  | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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