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Provisions and contingent liabilities - Additional information (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2020
PEN (S/)
Provisions and contingent liabilities          
Current provisions $ 81,039 $ 51,816      
Provision for closure of mining units and exploration projects at future value 310,700 277,700      
Letter of credit $ 155,900 140,000     S/ 1,780,126,238
Other non-current provisions   249,596      
Minimum          
Provisions and contingent liabilities          
Discount rate used to reflect time value of money for provisions 0.29%        
Period Used To Reflect Time Value Of Money For Provisions 1 year        
Maximum          
Provisions and contingent liabilities          
Discount rate used to reflect time value of money for provisions 3.63%        
Period Used To Reflect Time Value Of Money For Provisions 20 years        
Minera Yanacocha SRL and subsidiary [Member]          
Provisions and contingent liabilities          
Current provisions $ 141,728 101,786      
Provision for closure of mining units and exploration projects 2,515,914 $ 1,738,428 $ 1,608,380 $ 1,294,464  
Employee's profit share on annual taxable income   8.00%      
Other provisions 5,111 $ 7,352      
Other non-current provisions 2,393,956 1,660,603      
Increase in reclamation liability   815,000 121,000 301,000  
Increase in recorded asset retirement cost   7,900 4,000 159,000  
Non-cash charge to reclamation expense   $ 823,000 $ 124,000 $ 142,000  
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 S.A.A.          
Provisions and contingent liabilities          
Other non-current provisions 231,451 $ 307,974      
Sociedad Minera Cerro Verde S.A.A. | Provision for social commitments [Member]          
Provisions and contingent liabilities          
Other non-current provisions 1,226 1,226      
Sociedad Minera Cerro Verde S.A.A. | Provision for remediation and mine closure [Member]          
Provisions and contingent liabilities          
Other non-current provisions 219,942 237,387      
Future value of non current provisions $ 374,300 $ 374,400      
Annual risk free rate 1.93% 1.56%     1.56%
Sociedad Minera Cerro Verde S.A.A. | Provision for disputed mining royalties (c )          
Provisions and contingent liabilities          
Other non-current provisions   $ 44,982      
Sociedad Minera Cerro Verde S.A.A. | La Joya [Member] | Irrigation Project [Member] | Provision for social commitments [Member]          
Provisions and contingent liabilities          
Other provisions $ 4,400 4,400      
Sociedad Minera Cerro Verde S.A.A. | Alata-Congata Road [Member] | Repaving Project [Member] | Provision for social commitments [Member]          
Provisions and contingent liabilities          
Other provisions 6,300 $ 6,300      
Sociedad Minera Cerro Verde S.A.A. | Ministry of Energy and Mines [Member]          
Provisions and contingent liabilities          
Letter of credit $ 68,200