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Investments in associates and joint venture (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Investments in associates and joint ventures      
Joint venture (d) $ 2,497 $ 2,254  
Investment In Associates And Joint Ventures 1,422,295 $ 1,488,775 $ 1,488,247
Sociedad Minera Cerro Verde S.A.A.      
Investments in associates and joint ventures      
Proportion of ownership interest in associate   19.58% 19.58%
Compania Minera Coimolache S.A. [Member]      
Investments in associates and joint ventures      
Proportion of ownership interest in associate   40.10% 40.10%
Investment in associates $ 101,683 $ 104,833  
Tinka Resources Ltd [Member]      
Investments in associates and joint ventures      
Proportion of ownership interest in associate   19.30% 19.30%
Minera Yanacocha S.R.L. [Member]      
Investments in associates and joint ventures      
Proportion of ownership interest in associate 43.65% 43.65% 43.65%
Other minor investments [Member]      
Investments in associates and joint ventures      
Investment in associates $ 1,165 $ 1,865  
Associates [member]      
Investments in associates and joint ventures      
Investment in associates 1,418,633 1,484,656  
Associates [member] | Sociedad Minera Cerro Verde S.A.A.      
Investments in associates and joint ventures      
Investment in associates 1,305,377 1,209,126  
Associates [member] | Compania Minera Coimolache S.A. [Member]      
Investments in associates and joint ventures      
Investment in associates 101,683 104,833  
Associates [member] | Tinka Resources Ltd [Member]      
Investments in associates and joint ventures      
Investment in associates $ 11,573    
Associates [member] | Minera Yanacocha S.R.L. [Member]      
Investments in associates and joint ventures      
Investment in associates   157,835  
Associates [member] | Investment In Associates Excluding Minor Investments [Member]      
Investments in associates and joint ventures      
Investment in associates   $ 12,862