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Derivative financial instruments - Embedded derivatives (Details) - Sociedad Minera Cerro Verde S.A.A.
item in Thousands
 12 Months Ended
Dec. 31, 2022
USD ($)
item
Dec. 31, 2021
USD ($)
item
Disclosure Of Embedded derivatives [Line Items]    
Derivative financial asset liabilities $ 91,011,000 $ 12,793,000
Copper concentrate [Member]    
Disclosure Of Embedded derivatives [Line Items]    
Quantity of Metal | item 320,095 284,566
Embedded derivatives, maturity January 2023 to May 2023 January 2022 to May 2022
Derivative financial asset liabilities $ 63,335,000 $ 13,335,000
Copper concentrate [Member] | Minimum    
Disclosure Of Embedded derivatives [Line Items]    
Provisional pricing $ 3.448 $ 4.174
Forward pricing 3.798 4.400
Copper concentrate [Member] | Maximum    
Disclosure Of Embedded derivatives [Line Items]    
Provisional pricing $ 3.807 $ 4.584
Forward pricing 3.799 4.421
Copper cathode [Member]    
Disclosure Of Embedded derivatives [Line Items]    
Quantity of Metal | item 4,187 3,087
Embedded derivatives, maturity January 2023 January 2022
Forward pricing 3.798 4.421
Derivative financial asset liabilities $ (61,000) $ 318,000
Copper cathode [Member] | Minimum    
Disclosure Of Embedded derivatives [Line Items]    
Provisional pricing   $ 4.318
Molybdenum [Member]    
Disclosure Of Embedded derivatives [Line Items]    
Quantity of Metal | item 2,425 4,035
Embedded derivatives, maturity January 2023 to February 2023 January 2022 to February 2022
Forward pricing 28.267 16.456
Derivative financial asset liabilities $ 27,737,000 $ (860,000)
Molybdenum [Member] | Minimum    
Disclosure Of Embedded derivatives [Line Items]    
Provisional pricing 16.677 16.659
Molybdenum [Member] | Maximum    
Disclosure Of Embedded derivatives [Line Items]    
Provisional pricing $ 16.935 $ 16.773