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Cost of sales, without considering depreciation and amortization - Costs applicable to sales (Details) - New - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of cost of sales [Line Items]      
Royalties expenses $ 11,749 $ 12,832 $ 21,388
Depreciation and amortization 189,620 226,335 238,879
Cost of sales of goods, excluding depreciation and amortization 652,613 799,582 967,696
Cost of inventory recognized in cost of inventory 299,955 326,790 327,459
Minera Yanacocha Srl And Subsidiaries [Member]      
Disclosure of cost of sales [Line Items]      
Beginning balance of finished goods and in-process 302,382 341,213 345,489
Beginning balance of provision for net realizable value, note 8(b) 47,925 89,127 62,540
Consumption of supplies 138,041 200,036 215,863
Personnel expenses 61,298 72,325 82,645
Other services 31,864 41,120 43,671
Maintenance 17,415 26,645 22,585
Power 20,241 23,619 24,203
Depreciation and amortization 140,252 144,862 156,212
Workers' profit participation 17,199 12,804 3,837
Incremental costs related to COVID-19 pandemic and care and maintenance 43,672    
Provision for mine closure, note 12 124,780 142,129 16,285
Ending balance of provision for net realizable value, note 8(b) 13,287 47,925 89,127
Ending balance of finished goods and in-process 222,258 302,382 341,213
Cost of sales of goods, excluding depreciation and amortization 666,456 692,721 619,424
Minera Yanacocha Srl And Subsidiaries [Member] | S.M.R.L. Chaupiloma Dos de Cajamarca [Member]      
Disclosure of cost of sales [Line Items]      
Royalties expenses 18,638 22,297 20,385
Minera Yanacocha Srl And Subsidiaries [Member] | Government [member]      
Disclosure of cost of sales [Line Items]      
Royalties expenses $ 7,570 $ 9,255 $ 2,875