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Financial and capital risk management (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Assets $ 271 $ 342
Liabilities 36 90
Not Designated As Hedging Instruments [Member]    
IfrsStatementLineItems [Line Items]    
Assets 815 538
Liabilities 131 276
Not Designated As Hedging Instruments [Member] | Foreign Exchange And Interest Rate Risk [Member]    
IfrsStatementLineItems [Line Items]    
Assets 763 425
Liabilities 99 214
Not Designated As Hedging Instruments [Member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Assets 52 113
Liabilities 30 57
Not Designated As Hedging Instruments [Member] | Cdi Tjlp Versus Usd Fixed And Floating Rate Swap [Member] | Foreign Exchange And Interest Rate Risk [Member]    
IfrsStatementLineItems [Line Items]    
Assets 109 11
Liabilities 30 144
Not Designated As Hedging Instruments [Member] | Ipca Swap [Member] | Foreign Exchange And Interest Rate Risk [Member]    
IfrsStatementLineItems [Line Items]    
Liabilities 41 63
Not Designated As Hedging Instruments [Member] | Dollar Swap [Member] | Foreign Exchange And Interest Rate Risk [Member]    
IfrsStatementLineItems [Line Items]    
Assets 650 407
Liabilities 7
Not Designated As Hedging Instruments [Member] | Libor Swap [Member] | Foreign Exchange And Interest Rate Risk [Member]    
IfrsStatementLineItems [Line Items]    
Assets 4 7
Liabilities 28
Not Designated As Hedging Instruments [Member] | Bunker Oil Gasoil And Brent [Member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Assets 52 78
Liabilities 22 56
Not Designated As Hedging Instruments [Member] | Energy Transition Materials [Member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Assets 35
Liabilities 8 1
Not Designated As Hedging Instruments [Member] | Other Options [Member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Assets
Liabilities $ 2 $ 5