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Trade and other receivables, net - Receivables (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Trade and other receivables, net        
Trade receivables, gross $ 181,968 $ 226,112    
Other receivables, gross 183,054 182,137    
Allowance for expected credit losses (b) (9,717) (10,006) $ (10,089)  
Other Receivables 173,337 172,131    
Total trade and other receivables, net 333,177 376,227    
Trade and other receivables, net 230,830 287,712    
Trade and other receivables, net 102,347 88,515    
Foreign clients [Member]        
Trade and other receivables, net        
Trade receivables, gross 46,612 78,860    
Advances to suppliers [Member]        
Trade and other receivables, net        
Other receivables, gross 20,569 9,275    
Tax claims [Member]        
Trade and other receivables, net        
Other receivables, gross 62,373 44,014    
Related entities [Member]        
Trade and other receivables, net        
Trade receivables, gross [1] 6,073 6,247    
Other receivables, gross 2,312 2,967    
Other [Member]        
Trade and other receivables, net        
Other receivables, gross 475 743    
Minera Yanacocha SRL and subsidiary [Member]        
Trade and other receivables, net        
Other receivables, gross 34,185 43,311    
Allowance for expected credit losses (b) (1,384) (1,384) $ (1,384) $ (1,384)
Other Receivables 32,801 41,927    
Total trade and other receivables, net 49,720 42,610    
Trade and other receivables, net 28,044 18,962    
Trade and other receivables, net 21,676 23,648    
Minera Yanacocha SRL and subsidiary [Member] | Foreign clients [Member]        
Trade and other receivables, net        
Trade receivables, gross 16,919 683    
Minera Yanacocha SRL and subsidiary [Member] | Advances to suppliers [Member]        
Trade and other receivables, net        
Other Receivables 7,095 9,872    
Minera Yanacocha SRL and subsidiary [Member] | Tax claims [Member]        
Trade and other receivables, net        
Other Receivables 386 3,946    
Minera Yanacocha SRL and subsidiary [Member] | Related entities [Member]        
Trade and other receivables, net        
Other Receivables 2,300 598    
Minera Yanacocha SRL and subsidiary [Member] | Other [Member]        
Trade and other receivables, net        
Other Receivables 2,728 5,247    
Minera Yanacocha SRL and subsidiary [Member] | Credit of tax on net assets [Member]        
Trade and other receivables, net        
Other Receivables $ 21,676 $ 23,648    
[1] (b)Trade accounts receivable are denominated in U.S. dollars, are neither due nor impaired, do not yield interest and have no specific guarantees.