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Provisions, contingent liabilities and other liabilities - Movement of the provision for closure of mining units (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Provisions and contingent liabilities      
Disbursements   $ (16,508)  
Classification by maturity      
Current portion $ 81,039 51,816  
Non-current portion 232,288 249,596  
Closure Of Mining Units Exploration Projects [Member]      
Provisions and contingent liabilities      
Beginning balance 277,689 252,305  
Continuing mining units, note 11(a) (3,272) 31,500  
Discontinued mining units, note 1(e) 3,021 58  
Exploration projects, note 28(a) 2,030 642  
Continuing mining units, note 29(a) 5,522 6,424  
Discontinued mining units, note 1(e) 25 176  
Exploration projects, note 29(a) 76 248  
Sale of mining unit   (5,093)  
Disbursements (13,104) (8,571)  
Ending balance 271,987 277,689 $ 252,305
Classification by maturity      
Current portion 54,013 32,462  
Non-current portion 217,974 245,227  
Provision for closure of mining units and exploration projects 271,987 277,689 252,305
Minera Yanacocha SRL and subsidiary [Member]      
Provisions and contingent liabilities      
Beginning balance 1,738,428 1,608,380 1,294,464
Additions (reversals) in estimates 815,123 120,655 301,096
Payments (71,247) (22,656) (23,889)
Unwinding of discount, note 22 33,610 32,049 36,709
Ending balance 2,515,914 1,738,428 1,608,380
Classification by maturity      
Current portion 135,317 92,706 39,156
Non-current portion 2,380,597 1,645,722 1,569,224
Provision for closure of mining units and exploration projects $ 2,515,914 $ 1,738,428 $ 1,608,380