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Provisions, contingent liabilities and other liabilities - Provision for remediation and mine closure (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Provisions and contingent liabilities |  |
Changes in estimates, Note 7 | $ 37,600 | $ 60,000
Provision for remediation and mine closure [Member] |  |
Provisions and contingent liabilities |  |
Beginning balance | 195,900 | 131,888
Accretion expense | 4,196 | 4,048
Additions, Note 7 | 37,569 | 59,964
Progressive mine closure payments in hydrometallurgy process | (122) |
Final balance | 237,543 | 195,900
Minera Yanacocha SRL and subsidiary [Member] |  |
Provisions and contingent liabilities |  |
Beginning balance | 1,587,551 |
Final balance | 1,660,603 | 1,587,551
Sociedad Minera Cerro Verde Saa [Member] |  |
Provisions and contingent liabilities |  |
Beginning balance | 278,419 |
Final balance | 307,974 | 278,419
Sociedad Minera Cerro Verde Saa [Member] | Provision for remediation and mine closure [Member] |  |
Provisions and contingent liabilities |  |
Beginning balance | 195,659 |
Final balance | $ 237,387 | $ 195,659

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- Definition The amount of additional other provisions made. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2020-01-01 -Paragraph 84 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_84_b&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The increase in other provisions through adjustments arising from the passage of time. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2020-01-01 -Paragraph 84 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_84_e&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The increase (decrease) in other provisions resulting from transfers and changes that the entity does not separately disclose in the same statement or note. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 37 -IssueDate 2020-01-01 -Paragraph 84 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_84&doctype=Standard -URIDate 2020-01-01 + Details
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