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Trade and other receivables, net - Receivables (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Trade and other receivables, net        
Trade receivables, gross $ 226,112 $ 168,714    
Other receivables, gross 182,137 115,696    
Allowance for doubtful accounts (10,006) (10,089) $ (9,361)  
Other Receivables 172,131 105,607    
Total trade and other receivables, net 376,227 252,308    
Other accounts receivable, net 287,712 211,715    
Trade and other receivables, net 88,515 40,593    
Foreign clients [Member]        
Trade and other receivables, net        
Trade receivables, gross 78,860 56,312    
Advances to suppliers [Member]        
Trade and other receivables, net        
Other Receivables 9,275 7,542    
Tax claims [Member]        
Trade and other receivables, net        
Other Receivables 42,602 2,573    
Related entities [Member]        
Trade and other receivables, net        
Trade receivables, gross [1] 6,247 7,177    
Other Receivables 2,967 3,705    
Other minors [Member]        
Trade and other receivables, net        
Other Receivables 743 2,738    
Minera Yanacocha SRL and subsidiary [Member]        
Trade and other receivables, net        
Other receivables, gross 43,311 49,895    
Allowance for doubtful accounts (1,384) (1,384) $ (1,384) $ (1,407)
Other Receivables 41,927 48,511    
Total trade and other receivables, net 42,610 55,900    
Other accounts receivable, net 18,962 32,610    
Trade and other receivables, net 23,648 23,290    
Minera Yanacocha SRL and subsidiary [Member] | Foreign clients [Member]        
Trade and other receivables, net        
Trade receivables, gross 683 7,389    
Minera Yanacocha SRL and subsidiary [Member] | Advances to suppliers [Member]        
Trade and other receivables, net        
Other Receivables 9,872 16,897    
Minera Yanacocha SRL and subsidiary [Member] | Tax claims [Member]        
Trade and other receivables, net        
Other Receivables 3,946 3,532    
Minera Yanacocha SRL and subsidiary [Member] | Related entities [Member]        
Trade and other receivables, net        
Other Receivables 598 794    
Minera Yanacocha SRL and subsidiary [Member] | Other minors [Member]        
Trade and other receivables, net        
Other Receivables 5,247 5,382    
Minera Yanacocha SRL and subsidiary [Member] | Credit of tax on net assets [Member]        
Trade and other receivables, net        
Other Receivables $ 23,648 $ 23,290    
[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.