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Risk management (Details 5)
$ in Millions
Dec. 31, 2023
USD ($)
Derivatives [member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Risk exposure associated with instruments $ (18)
Derivatives [member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Risk exposure associated with instruments (37)
Derivatives Not Designated For Hedge Accounting [Member] | Crudeoil And Oil Products Price Changes [Member] | Futures contract [member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Risk exposure associated with instruments (18)
Derivatives Not Designated For Hedge Accounting [Member] | Crudeoil And Oil Products Prices Changes [Member] | Futures contract [member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Risk exposure associated with instruments $ (37)