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Provisions and contingent liabilities - Provision classification (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Non-current provisions [abstract]        
Other non-current provisions   $ 249,596    
Classification by maturity [Abstract]        
Current provisions $ 81,039 51,816    
Non-current Portion 232,288 249,596    
Non-current portion   249,596    
Minera Yanacocha SRL and subsidiary [Member]        
Provisions and contingent liabilities        
Provision for closure of mining units and exploration projects 2,515,914 1,738,428 $ 1,608,380 $ 1,294,464
Provision for social responsibility 14,659 16,609 $ 18,326 $ 18,010
Accrual of operating costs 7,135 15,938    
Workers' profit sharing payable 13,851 17,311    
Provisions for Accruals Of Capital Expenditures 36,195 20,147    
Total 5,111 7,352    
Provisions 2,535,684 1,762,389    
Provisions, Other Accruals And Liabilities 2,535,684 1,762,389    
Provisions for Accruals Of Capital Expenditures 36,195 20,147    
Non-current provisions [abstract]        
Other non-current provisions 2,393,956 1,660,603    
Classification by maturity [Abstract]        
Current provisions 141,728 101,786    
Provisions 2,535,684 1,762,389    
Non-current portion 2,393,956 1,660,603    
Total 5,111 7,352    
Sociedad Minera Cerro Verde S.A.A.        
Current provisions [abstract]        
Other current provisions 12,717 9,625    
Non-current provisions [abstract]        
Other non-current provisions 231,451 307,974    
Classification by maturity [Abstract]        
Current portion 12,717 9,625    
Non-current portion 231,451 307,974    
Sociedad Minera Cerro Verde S.A.A. | Provision for social commitments [Member]        
Current provisions [abstract]        
Other current provisions 9,399 9,469    
Non-current provisions [abstract]        
Other non-current provisions 1,226 1,226    
Classification by maturity [Abstract]        
Current portion 9,399 9,469    
Non-current portion 1,226 1,226    
Sociedad Minera Cerro Verde S.A.A. | Provision for remediation and mine closure [Member]        
Current provisions [abstract]        
Other current provisions 2,968 156    
Non-current provisions [abstract]        
Other non-current provisions 219,942 237,387    
Classification by maturity [Abstract]        
Current portion 2,968 156    
Non-current portion 219,942 237,387    
Sociedad Minera Cerro Verde S.A.A. | Provision for uncertainty over income tax treatments [Member]        
Non-current provisions [abstract]        
Other non-current provisions 7,878 12,872    
Classification by maturity [Abstract]        
Non-current portion 7,878 12,872    
Sociedad Minera Cerro Verde S.A.A. | Provision for legal contingencies [member]        
Current provisions [abstract]        
Other current provisions 350      
Classification by maturity [Abstract]        
Non-current Portion 2,004 1,924    
Current portion 350      
Sociedad Minera Cerro Verde S.A.A. | Other Long-term Liabilities [Member]        
Non-current provisions [abstract]        
Other non-current provisions 401 9,583    
Classification by maturity [Abstract]        
Non-current portion $ 401 9,583    
Sociedad Minera Cerro Verde S.A.A. | Provision for disputed mining royalties (c )        
Non-current provisions [abstract]        
Other non-current provisions   44,982    
Classification by maturity [Abstract]        
Non-current portion   $ 44,982