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Transactions with associates companies - Accounts receivable, payable from/to associates (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Transactions with associates companies [Line Items]    
Trade receivables $ 204,096 $ 146,701
Other Receivables 172,131 105,607
Total trade and other payables total 80 56
Associates [member]    
Disclosure Of Transactions with associates companies [Line Items]    
Trade receivables 6,247 7,177
Other Receivables 2,967 3,705
Trade and other receivable total 9,214 10,882
Trade payables 29 36
Others [Member]    
Disclosure Of Transactions with associates companies [Line Items]    
Other payables 51 20
Minera Yanacocha S.R.L. [Member] | Associates [member]    
Disclosure Of Transactions with associates companies [Line Items]    
Trade receivables 5,920 6,791
Compania Minera Coimolache S.A. [Member] | Associates [member]    
Disclosure Of Transactions with associates companies [Line Items]    
Trade receivables 327 386
Other Receivables 1,016 1,234
Trade payables 27 36
Sociedad Minera Cerro Verde Saa [Member] | Associates [member]    
Disclosure Of Transactions with associates companies [Line Items]    
Trade payables 2 0
Transportadora Callao SA [Member] | Associates [member]    
Disclosure Of Transactions with associates companies [Line Items]    
Other Receivables $ 1,951 $ 2,471