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Financial and capital risk management (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
IfrsStatementLineItems [Line Items] |  |
Assets | $ 168 | $ 271
Liabilities | 135 | 36
Not Designated As Hedging Instruments [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Assets | 277 | 815
Liabilities | 240 | 131
Not Designated As Hedging Instruments [Member] | Foreign Exchange And Interest Rate Risk [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Assets | 260 | 763
Liabilities | 234 | 99
Not Designated As Hedging Instruments [Member] | Commodity price risk [member] |  |
IfrsStatementLineItems [Line Items] |  |
Assets | 17 | 52
Liabilities | 5 | 30
Not Designated As Hedging Instruments [Member] | CDI & TJLP vs. US$ Fixed and Floating Rate Swap [Member] | Foreign Exchange And Interest Rate Risk [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Assets | 13 | 109
Liabilities | 70 | 30
Not Designated As Hedging Instruments [Member] | Ipca Swap [Member] | Foreign Exchange And Interest Rate Risk [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Liabilities | 57 | 41
Not Designated As Hedging Instruments [Member] | Dollar Swap [Member] | Foreign Exchange And Interest Rate Risk [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Assets | 230 | 650
Liabilities | 100 |
Not Designated As Hedging Instruments [Member] | SOFR Swap [Member] | Foreign Exchange And Interest Rate Risk [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Assets | 16 | 4
Liabilities |  | 28
Not Designated As Hedging Instruments [Member] | Treasury Forwards [Member] | Foreign Exchange And Interest Rate Risk [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Assets | 1 |
Liabilities | 7 |
Not Designated As Hedging Instruments [Member] | Bunker Oil Gasoil And Brent [Member] | Commodity price risk [member] |  |
IfrsStatementLineItems [Line Items] |  |
Assets | 16 | 52
Liabilities |  | 22
Not Designated As Hedging Instruments [Member] | Energy Transition Materials [Member] | Commodity price risk [member] |  |
IfrsStatementLineItems [Line Items] |  |
Assets | 1 |
Liabilities | 5 | 8
Not Designated As Hedging Instruments [Member] | Other Options [Member] | Commodity price risk [member] |  |
IfrsStatementLineItems [Line Items] |  |
Assets |  |
Liabilities | $ 1 | $ 2

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