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Commitments and contractual obligations - Additional Information (Details)
12 Months Ended
Dec. 31, 2024
t
Hellas Gold SA ("Hellas") | Zinc  
Disclosure of contingent liabilities [line items]  
Number of dry metric tonnes 48,000
Hellas Gold SA ("Hellas") | Lead And Silver Concentrates  
Disclosure of contingent liabilities [line items]  
Number of dry metric tonnes 24,000
Hellas Gold SA ("Hellas") | Gold Concentrate  
Disclosure of contingent liabilities [line items]  
Number of dry metric tonnes 380,000
Tuprag Metal Madencilik Sanayi Ve Ticaret AS | Gold Concentrate  
Disclosure of contingent liabilities [line items]  
Number of dry metric tonnes 59,400