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Basis for preparation, consolidation and accounting policies - Reclassifications of comparative information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2016
Disclosure of basis for preparation, consolidation and accounting policies [Line Items]        
Sales $ 863,470,000 $ 637,619,000 $ 821,930,000  
Cost applicable to sales (529,731,000) (393,888,000) (512,874,000)  
Trade and other payables 259,641,000 196,140,000    
Income tax payable 3,026,000 3,162,000    
Royalties expenses 12,974,000 11,749,000 12,832,000  
Accounts payable 262,678,000 198,882,000    
Current liabilities 844,937,000 360,436,000    
Non-current liabilities 1,178,343,000 819,324,000    
Current liabilities        
Trade and other payables 259,641,000 196,140,000    
Provisions and contingent liabilities 81,039,000 51,816,000    
Non-current liabilities        
Provisions and contingent liabilities   249,596,000    
Profit (loss) [abstract]        
Finance income     4,125,000  
Other, net (29,260,000) 2,690,000 (11,090,000)  
Adjustments to reconcile profit after income tax to net cash flows from operating activities:        
Trade and other payables   2,742,000    
Current income tax expense 9,700,000 9,700,000 9,700,000 $ 9,700,000
Net cash and cash equivalents provided by (used in) operating activities (197,510,000) 142,434,000 69,076,000  
Previously stated        
Disclosure of basis for preparation, consolidation and accounting policies [Line Items]        
Trade and other payables   179,956,000    
Current liabilities        
Trade and other payables   179,956,000    
Provisions and contingent liabilities   68,000,000    
Non-current liabilities        
Provisions and contingent liabilities   252,338,000    
Profit (loss) [abstract]        
Finance income     9,675,000  
Other, net     (14,715,000)  
Reclassifications        
Disclosure of basis for preparation, consolidation and accounting policies [Line Items]        
Trade and other payables   16,184,000    
Current liabilities   16,184,000    
Non-current liabilities   2,742,000    
Dividends income     3,625,000  
Current liabilities        
Trade and other payables   16,184,000    
Provisions and contingent liabilities   (16,184,000)    
Non-current liabilities        
Provisions and contingent liabilities   (2,742,000)    
Profit (loss) [abstract]        
Finance income     (3,625,000)  
Other, net     3,625,000  
Adjustments to reconcile profit after income tax to net cash flows from operating activities:        
Trade and other payables   2,742,000    
Minera Yanacocha SRL and subsidiary [Member]        
Disclosure of basis for preparation, consolidation and accounting policies [Line Items]        
Sales 471,069,000 592,394,000 734,526,000  
Cost applicable to sales (1,252,710,000) (666,456,000) (692,721,000)  
Trade and other payables 86,659,000 68,645,000    
Income tax payable 7,407,000 42,029,000    
Provision related to benefits to employees 13,851,000 17,311,000    
Current liabilities 310,039,000 282,986,000    
Non-current liabilities 2,441,036,000 1,706,066,000    
Current liabilities        
Trade and other payables 86,659,000 68,645,000    
Provisions and contingent liabilities 141,728,000 101,786,000    
Non-current liabilities        
Provisions and contingent liabilities 2,393,956,000 1,660,603,000    
Other accruals and liabilities 0 40,000    
Profit (loss) [abstract]        
Other, net 58,748,000 27,768,000 4,776,000  
Adjustments to reconcile profit after income tax to net cash flows from operating activities:        
Provisions (5,029,000) (982,000) 10,051,000  
Trade and other payables 17,842,000 (3,706,000) (8,231,000)  
Other accruals and liabilities (13,013,000) 20,753,000 21,282,000  
Value added tax credit and other taxes 13,413,000 (6,439,000) (16,491,000)  
Current income tax expense 50,008,000 53,018,000 64,928,000  
Net cash and cash equivalents provided by (used in) operating activities 13,163,000 195,855,000 272,396,000  
Sociedad Minera Cerro Verde S.A.A. [Member]        
Disclosure of basis for preparation, consolidation and accounting policies [Line Items]        
Sales 4,199,448,000 2,538,593,000 2,890,066,000  
Income tax payable   34,716,000    
Royalties expenses 10,334,000 5,889,000 6,828,000  
Accounts payable - Related entities 3,426,000 3,446,000    
Other capital contributions 11,700,000 11,500,000 $ 10,100,000  
Accounts payable $ 15,100,000 $ 12,400,000