v3.26.1
Brumadinho dam failure (Details Narrative) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
IfrsStatementLineItems [Line Items]    
Present value at nominal rate 8.61% 8.07%
USD [Member]    
IfrsStatementLineItems [Line Items]    
Estimated losses $ 348.0  
Estimated amount 753.0  
Estimated amount of dispute 580.0  
BRL [Member]    
IfrsStatementLineItems [Line Items]    
Estimated losses 1,800.0  
Estimated amount 3,900.0  
Estimated amount of dispute $ 3,000.0  
Bottom of range [member]    
IfrsStatementLineItems [Line Items]    
Estimated obligation average period 4 years  
Top of range [member]    
IfrsStatementLineItems [Line Items]    
Estimated obligation average period 6 years