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Financial - risk management objectives and policies - Aging of obligations (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Financial risk management [Line Items]        
Lease liabilities $ 5,779 $ 7,839    
Other accounts payable 14 328    
Trade and other payables. 262,678 198,882    
Total financial liabilities 1,057,975 531,653 $ 571,688 $ 587,062
Sociedad Minera Cerro Verde S.A.A. [Member]        
Disclosure Of Financial risk management [Line Items]        
Trade accounts payable 235,555 195,482    
Accounts payable - related parties 3,426 3,446    
Senior unsecured credit facility 324,695 523,451    
Lease liabilities 70,120 79,217    
Other accounts payable 73,235 424,000    
Trade and other payables. 15,100 12,400    
Total financial liabilities 707,031 1,225,596    
Sociedad Minera Cerro Verde S.A.A. [Member] | On Demands [Member]        
Disclosure Of Financial risk management [Line Items]        
Trade accounts payable 0 0    
Accounts payable - related parties 0 0    
Senior unsecured credit facility 0 0    
Lease liabilities 0 0    
Other accounts payable 0 0    
Total financial liabilities 0 0    
Sociedad Minera Cerro Verde S.A.A. [Member] | Not later than three months [member]        
Disclosure Of Financial risk management [Line Items]        
Trade accounts payable 234,640 192,484    
Accounts payable - related parties 3,426 3,446    
Senior unsecured credit facility 0 0    
Lease liabilities 1,257 1,551    
Other accounts payable 66,818 63,515    
Total financial liabilities 306,141 260,996    
Sociedad Minera Cerro Verde S.A.A. [Member] | Later than three months and not later than one year [member]        
Disclosure Of Financial risk management [Line Items]        
Trade accounts payable 277 2,998    
Accounts payable - related parties 0 0    
Senior unsecured credit facility 324,695 0    
Lease liabilities 6,360 8,672    
Other accounts payable 6,417 75,093    
Total financial liabilities 337,749 86,763    
Sociedad Minera Cerro Verde S.A.A. [Member] | Between 2 and 5 years [member]        
Disclosure Of Financial risk management [Line Items]        
Trade accounts payable 638      
Senior unsecured credit facility   523,451    
Lease liabilities 41,085 37,299    
Other accounts payable   285,392    
Total financial liabilities 41,723 846,142    
Sociedad Minera Cerro Verde S.A.A. [Member] | More than 5 years        
Disclosure Of Financial risk management [Line Items]        
Trade accounts payable 0 0    
Accounts payable - related parties 0 0    
Senior unsecured credit facility 0 0    
Lease liabilities 21,418 31,695    
Other accounts payable 0 0    
Total financial liabilities $ 21,418 $ 31,695