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Transactions in soles - Additional information (Details)
Dec. 31, 2021
PEN (S/)
$ / shares
Dec. 31, 2020
$ / shares
PEN (S/)
Purchased call options [member]    
Transactions in Soles    
Closing foreign exchange rate | $ / shares 0.2516 0.2764
Purchased call options [member] | Sociedad Minera Cerro Verde S.A.A. [Member]    
Transactions in Soles    
Closing foreign exchange rate | S/ 3.975 3.618
Written put options [member]    
Transactions in Soles    
Closing foreign exchange rate | $ / shares 0.2501 0.2759
Written put options [member] | Sociedad Minera Cerro Verde S.A.A. [Member]    
Transactions in Soles    
Closing foreign exchange rate | S/ 3.998 3.624