v3.26.1
Asset retirement, restoration and environmental obligations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
IfrsStatementLineItems [Line Items]    
Balance at the beginning of the year $ 279,386 $ 314,919
Additions 11,291 56,375
Payments (17,153) (17,785)
Reversals (1)
Interest accrual 26,587 26,058
Remeasurement discount rate 8,671 (28,224)
Write-offs (8,391) (710)
Foreign exchange effects 20,042 (39,368)
Classified as liabilities associated with assets held for sale (31,878)
Balance at the end of the year 320,433 279,386
Current liabilities 39,326 47,561
Non-current liabilities 281,107 231,825
Provision for decommissioning, restoration and rehabilitation costs [member]    
IfrsStatementLineItems [Line Items]    
Balance at the beginning of the year 240,408  
Additions 10,188  
Payments (12,744)  
Reversals  
Interest accrual 23,012  
Remeasurement discount rate 8,919  
Write-offs  
Foreign exchange effects 15,028  
Classified as liabilities associated with assets held for sale  
Balance at the end of the year 284,811 240,408
Current liabilities 35,032  
Non-current liabilities 249,779  
Other environment related provision [member]    
IfrsStatementLineItems [Line Items]    
Balance at the beginning of the year 32,159  
Additions 1,103  
Payments (4,409)  
Reversals  
Interest accrual 3,114  
Remeasurement discount rate (339)  
Write-offs  
Foreign exchange effects 3,994  
Classified as liabilities associated with assets held for sale  
Balance at the end of the year 35,622 32,159
Current liabilities 4,294  
Non-current liabilities 31,328  
Dams Obligations [Member]    
IfrsStatementLineItems [Line Items]    
Balance at the beginning of the year 6,819  
Additions  
Payments  
Reversals  
Interest accrual 461  
Remeasurement discount rate 91  
Write-offs (8,391)  
Foreign exchange effects 1,020  
Classified as liabilities associated with assets held for sale  
Balance at the end of the year $ 6,819
Current liabilities  
Non-current liabilities