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v3.21.1

Provisions, contingent liabilities and other liabilities - Additional information (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2020 PEN (S/) | Dec. 31, 2020 USD ($) | Dec. 31, 2017 USD ($)
Provisions and contingent liabilities |  |  |  |  |  |
Current provisions |  | $ 72,771 |  |  | $ 68,000 |
Provision for closure of mining units and exploration projects at future value |  | $ 252,300 |  |  | 309,300 |
Period Used To Reflect Time Value Of Money For Provisions |  | 22 years |  |  |  |
Letter of credit |  | $ 121,400 |  | S/ 1,780,126,238 | $ 140,000 |
Annual risk free rate |  |  |  | 1.56% | 1.56% |
Increase (decrease) through transfers and other changes, other provisions | $ 37,600 | $ 60,000 |  |  |  |
Minimum |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Discount rate used to reflect time value of money for provisions |  | 1.79% |  | 0.31% | 0.31% |
Period Used To Reflect Time Value Of Money For Provisions | 1 year | 1 year |  |  |  |
Maximum |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Discount rate used to reflect time value of money for provisions |  | 3.12% |  | 2.77% | 2.77% |
Period Used To Reflect Time Value Of Money For Provisions | 20 years |  |  |  |  |
Provision for remediation and mine closure [Member] |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Other non-current provisions |  | $ 195,900 | $ 131,888 |  | $ 237,543 |
Future value of non current provisions |  | $ 374,400 |  |  | 374,400 |
Annual risk free rate |  | 2.28% |  |  |  |
Provision for disputed mining royalties (c ) |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Interest and penalties associated with income tax related to disputed mining royalties |  |  |  |  | 45,000 |
Miscellaneous other provisions [member] |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Provision for unfavorable results from SUNAT assessments |  | $ 3,800 |  |  | 9,600 |
Interest and penalties associated with SUNAT |  | 4,300 |  |  | 12,900 |
Provision for royalties and mining tax [Member] |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Interest and penalties associated with income tax related to disputed mining royalties |  | 42,100 |  |  |  |
Interest and penalties associated with ITAN |  | 6,700 |  |  |  |
Interest and penalties associated with SRF |  | 1,900 |  |  |  |
Net asset tax included in provisions |  | 12,100 |  |  |  |
La Joya [Member] | Irrigation Project [Member] | Provision for social commitments [Member] |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Other provisions |  |  |  |  | 4,400 |
Alata-Congata Road [Member] | Repaving Project [Member] | Provision for social commitments [Member] |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Other provisions |  |  |  |  | 6,300 |
Minera Yanacocha SRL and subsidiary [Member] |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Current provisions |  | 45,317 |  |  | 101,786 |
Provision for closure of mining units and exploration projects |  | 1,608,380 | 1,294,464 |  | 1,738,428 | $ 1,234,731
Employee's profit share on annual taxable income | 8.00% |  |  |  |  |
Other provisions |  | 6,162 |  |  | 7,352 |
Other non-current provisions |  | 1,587,551 |  |  | 1,660,603 |
Increase in reclamation liability | $ 121,000 | 301,000 | 44,000 |  |  |
Increase in recorded asset retirement cost | 4,000 | 159,000 | 27,200 |  |  |
Non-cash charge to reclamation expense | $ 124,000 | $ 142,000 | $ 16,300 |  |  |
Minera Yanacocha SRL and subsidiary [Member] | Minimum |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Discount rates used in the calculation of the provision | 0.40% | 0.40% | 0.40% |  |  |
Minera Yanacocha SRL and subsidiary [Member] | Maximum |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Discount rates used in the calculation of the provision | 6.00% | 6.00% | 6.00% |  |  |
Sociedad Minera Cerro Verde Saa [Member] |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Other non-current provisions |  | $ 278,419 |  |  | 307,974 |
Sociedad Minera Cerro Verde Saa [Member] | Provision for social commitments [Member] |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Other non-current provisions |  | 3,046 |  |  | 1,226 |
Sociedad Minera Cerro Verde Saa [Member] | Provision for remediation and mine closure [Member] |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Other non-current provisions |  | 195,659 |  |  | 237,387 |
Sociedad Minera Cerro Verde Saa [Member] | Provision for disputed mining royalties (c ) |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Other non-current provisions |  | $ 62,797 |  |  | 44,982 |
Sociedad Minera Cerro Verde Saa [Member] | Ministry of Energy and Mines [Member] |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Letter of credit |  |  |  |  | $ 59,400 |

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- Definition The discount rate used to reflect the time value of money that is applicable to provision for closure of mining units and exploration projects. + References No definition available. + Details
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