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Critical accounting estimates and judgments (Tables)
 12 Months Ended
Dec. 31, 2023
Disclosure Of Critical Accounting Estimates And Judgment [Abstract]  
Disclosure of estimate of reclamation obligations [Table Text Block]
          Years ended December 31  
    2023     2022     2021  
Risk-free interest rate   3.02%     3.28%     1.68%  
Annual inflation   2.25%     2.50%     2.50%