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Financial and capital risk management - Sensitivity analysis of derivative financial instruments (Details 5)
bbl in Millions, $ in Millions
 6 Months Ended
Jun. 30, 2023
USD ($)
bbl
Dec. 31, 2022
USD ($)
bbl
Bunker Oil Call Options Bought [Member]    
IfrsStatementLineItems [Line Items]    
Notional amount per barrel | bbl 31,139,250 22,600,500
Average strike per ton 95  
Fair value of liabilities $ 68 $ 74
Value at risk 15  
Financial settlement inflows outflows 13  
Bunker Oil Call Options Bought [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 6  
Bunker Oil Call Options Bought [Member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Value at risk $ 62  
Bunker Oil Put Options Sold [Member]    
IfrsStatementLineItems [Line Items]    
Notional amount per barrel | bbl 31,139,250 22,600,500
Average strike per ton 62  
Fair value of liabilities $ (71) $ (51)
Value at risk 16  
Bunker Oil Put Options Sold [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Value at risk (23)  
Bunker Oil Put Options Sold [Member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Value at risk $ (48)  
Bunker Oil Forwards Contract Bought [Member]    
IfrsStatementLineItems [Line Items]    
Notional amount per barrel | bbl 960 2,085
Average strike per ton 13,791  
Fair value of liabilities $ 2 $ (1)
Value at risk 1  
Financial settlement inflows outflows 3  
Bunker Oil Forwards Contract Bought [Member] | Freight Forwards [Member]    
IfrsStatementLineItems [Line Items]    
Value at risk 2  
Forward Freight [Member]    
IfrsStatementLineItems [Line Items]    
Fair value of liabilities (1) $ 22
Value at risk 32  
Financial settlement inflows outflows 3  
Forward Freight [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Value at risk (15)  
Forward Freight [Member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Value at risk $ 14