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Financial risk management (Details 12) - Reasonably Possible Scenario [Member]
$ in Millions
Dec. 31, 2024
USD ($)
Derivatives [member]  
IfrsStatementLineItems [Line Items]  
Risk exposure associated with instruments $ (150)
Derivatives Not Designated For Hedge Accounting [Member] | Crudeoil And Oil Products Price Changes [Member] | Futures contract [member]  
IfrsStatementLineItems [Line Items]  
Risk exposure associated with instruments (148)
Derivatives Not Designated For Hedge Accounting [Member] | Foreign Currency Depreciation [Member] | Forward contract [member]  
IfrsStatementLineItems [Line Items]  
Risk exposure associated with instruments $ (2)