v3.26.1
Financial and capital risk management (Details 6)
bbl in Millions, $ in Millions
Jun. 30, 2026
USD ($)
bbl
Dec. 31, 2025
USD ($)
bbl
Bunker Oil Options [Member]    
IfrsStatementLineItems [Line Items]    
Notional amount per barrel | bbl 28,959,063 22,224,999
Fair value of liabilities $ (43) $ (5)
Bunker Oil Options [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 50  
Bunker Oil Options [Member] | Not later than three months [member]    
IfrsStatementLineItems [Line Items]    
Value at risk (93)  
Bunker Oil Forwards [Member]    
IfrsStatementLineItems [Line Items]    
Fair value of liabilities $ (11)  
Nominal amount of hedging instrument 480  
Bunker Oil Forwards [Member] | Not later than three months [member]    
IfrsStatementLineItems [Line Items]    
Value at risk $ (11)  
Bunker Oil Forwards Contract [Member]    
IfrsStatementLineItems [Line Items]    
Fair value of liabilities $ 16 $ 15
Nominal amount of hedging instrument 4,020 2,070
Bunker Oil Forwards Contract [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Value at risk $ 12  
Bunker Oil Forwards Contract [Member] | Not later than three months [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 3  
Bunker Oil Forwards Contract [Member] | Not later than one month [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 1  
Nickel Forwards Sold [Member]    
IfrsStatementLineItems [Line Items]    
Fair value of liabilities $ 18 $ 5
Nominal amount of hedging instrument 28,398 3,557
Nickel Forwards Sold [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Value at risk $ 18