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Financial and capital risk management (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Assets $ 53 $ 271
Liabilities 197 36
Not Designated As Hedging Instruments [Member]    
IfrsStatementLineItems [Line Items]    
Assets 68 815
Liabilities 625 131
Not Designated As Hedging Instruments [Member] | Foreign Exchange And Interest Rate Risk [Member]    
IfrsStatementLineItems [Line Items]    
Assets 52 763
Liabilities 601 99
Not Designated As Hedging Instruments [Member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Assets 16 52
Liabilities 23 30
Not Designated As Hedging Instruments [Member] | Embedded Derivatives Risk [Member]    
IfrsStatementLineItems [Line Items]    
Liabilities $ 1 $ 2