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Operating expenses, net (Details) - Minera Yanacocha SRL and subsidiary [Member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of Operating Expenses [line items]      
Operating expenses, net $ 34,322 $ 35,987 $ 76,155
Exploration and advanced projects [Member]      
Disclosure of Operating Expenses [line items]      
Operating expenses, net 19,279 33,669 62,643
Severance program [Member]      
Disclosure of Operating Expenses [line items]      
Operating expenses, net 4,454 2,210 8,678
Social responsibility commitments      
Disclosure of Operating Expenses [line items]      
Operating expenses, net 6,730 250  
Cost of fixed assets sold [Member]      
Disclosure of Operating Expenses [line items]      
Operating expenses, net 30 2,092 5,445
Tax fine [Member]      
Disclosure of Operating Expenses [line items]      
Operating expenses, net 11 2,019 3,954
Write-off of fixed assets [Member]      
Disclosure of Operating Expenses [line items]      
Operating expenses, net 460 1,204  
Income from fixed asset sales [Member]      
Disclosure of Operating Expenses [line items]      
Operating expenses, net (40) (8,088) (4,821)
Others, net [Member]      
Disclosure of Operating Expenses [line items]      
Operating expenses, net $ 3,398 $ 2,631 $ 256