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Trade and other payables (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Trade payables    
Trade payables $ 155,034 $ 194,757
Accounts payable 48,847 43,108
Other payables    
Other current payables 33,689 39,261
Classification by maturity:    
Trade and other current payables 188,084 233,355
Trade and other non-current payables 639 663
Trade and other payables 220,042 100,860
Minera Yanacocha SRL and subsidiary [Member]    
Trade payables    
Accounts payable 59,693 53,070
Other payables    
Other current payables 27,323 30,750
Classification by maturity:    
Trade and other current payables 87,016 83,820
Trade and other payables 81,215 63,300
Sociedad Minera Cerro Verde S.A.A. [Member]    
Trade payables    
Accounts payable 231,136 194,958
Other payables    
Other current payables 316,324 73,606
Classification by maturity:    
Current payables for purchase of non-current assets 42,400 33,700
Domestic suppliers [Member]    
Trade payables    
Trade payables 154,998 194,742
Related entities [Member]    
Trade payables    
Trade payables [1] 36 15
Other payables    
Other payables 20 62
Related entities [Member] | Minera Yanacocha SRL and subsidiary [Member]    
Trade payables    
Accounts payable 10,846 9,962
Taxes payable [Member]    
Other payables    
Other payables 9,102 9,405
Taxes payable [Member] | Minera Yanacocha SRL and subsidiary [Member]    
Other payables    
Other current payables 4,280 2,605
Interest Payable [Member]    
Other payables    
Other payables 7,464 7,152
Remuneration and similar benefits payable [Member]    
Other payables    
Other payables 10,531 11,585
Remuneration and similar benefits payable [Member] | Minera Yanacocha SRL and subsidiary [Member]    
Other payables    
Other current payables 22,907 27,419
Royalties payable to the Peruvian State [Member]    
Other payables    
Other payables 2,171 4,571
Royalties payable to the Peruvian State [Member] | Minera Yanacocha SRL and subsidiary [Member]    
Other payables    
Other current payables 136 726
Dividends payable [Member]    
Other payables    
Other payables 663 730
Other liability [Member]    
Other payables    
Other payables 3,738 5,756
Financial payables [Member]    
Classification by maturity:    
Trade and other payables 177,450 220,042
Non financial payables [Member]    
Classification by maturity:    
Trade and other payables $ 11,273 $ 13,976
[1] Trade payables arise mainly from the acquisition of material, supplies and spare parts and services provided by third parties. These obligations have current maturities, accrue no interest and are not secured.