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Note 31 - Related party transactions (Details Textual) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Apr. 30, 2024
Disclosure of transactions between related parties [line items]        
Total number of shares issued (in shares) 1,162,757,528 1,180,536,830 1,180,536,830 1,180,536,830
Key management personnel compensation, short-term employee benefits $ 33.4 $ 47.5 $ 35.2  
Key management personnel compensation, other long-term employee benefits $ 6.9 $ 5.6 $ 5.1  
San Faustin S.A. [member]        
Disclosure of transactions between related parties [line items]        
Percent of company voting capital 65.81%      
Total number of shares issued (in shares) 713,605,187      
Proportion of ownership interest in associate 61.37%      
Key management personnel of entity or parent [member]        
Disclosure of transactions between related parties [line items]        
Percent of company voting capital 0.08%      
Proportion of ownership interest in associate 0.07%      
Units issued, related party transactions (in shares) 448,000 388,000 437,000