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Financial - risk management objectives and policies - Credit risk exposure (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Disclosure of credit risk exposure [line items]    
Trade receivables $ 171,670 $ 181,968
Trade receivables $ 149,394 $ 159,840
Expected credit loss rate 0.00% 0.00%
Expected credit loss $ (30,897) $ (31,845)
Other receivables 735,491 183,054
Other Receivables 726,870 173,337
Total trade and other receivables 907,161 365,022
Minera Yanacocha SRL and subsidiary [Member]    
Disclosure of credit risk exposure [line items]    
Trade receivables $ 15,889 $ 29,042
Expected credit loss rate 9.65% 4.77%
Expected credit loss $ (1,384) $ (1,384)
Other receivables 15,694 34,185
Other Receivables 14,310 32,801
Total trade and other receivables 14,505 27,658
Current [member]    
Disclosure of credit risk exposure [line items]    
Trade receivables $ 149,394 $ 159,840
Expected credit loss rate 0.00% 0.00%
Expected credit loss $ 0 $ 0
Other receivables 726,870 172,116
Total trade and other receivables 876,264 331,956
Not later than one month [member]    
Disclosure of credit risk exposure [line items]    
Trade receivables $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Expected credit loss $ 0 $ 0
Other receivables 0 0
Total trade and other receivables 0 0
Not later than one month [member] | Minera Yanacocha SRL and subsidiary [Member]    
Disclosure of credit risk exposure [line items]    
Trade receivables 6,647 21,274
Total trade and other receivables 6,647 21,274
Later than one month and not later than three months [member]    
Disclosure of credit risk exposure [line items]    
Trade receivables $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Expected credit loss $ 0 $ 0
Other receivables 0 1,221
Total trade and other receivables 0 1,221
Later than one month and not later than three months [member] | Minera Yanacocha SRL and subsidiary [Member]    
Disclosure of credit risk exposure [line items]    
Trade receivables 4,010 2,797
Total trade and other receivables 4,010 2,797
Later than three months [member]    
Disclosure of credit risk exposure [line items]    
Trade receivables $ 22,276 $ 22,128
Expected credit loss rate 100.00% 100.00%
Expected credit loss $ (30,897) $ (31,845)
Other receivables 8,621 9,717
Total trade and other receivables 30,897 31,845
Later than three months [member] | Minera Yanacocha SRL and subsidiary [Member]    
Disclosure of credit risk exposure [line items]    
Trade receivables $ 5,232 $ 4,971
Expected credit loss rate 35.86% 27.84%
Expected credit loss $ (1,384) $ (1,384)
Total trade and other receivables $ 3,848 $ 3,587