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Financial and capital risk management (Details 1) - Not Designated As Hedging Instruments [Member] - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
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IfrsStatementLineItems [Line Items] |  |
Derivative Financial Assets Liabilities | $ 37 | $ 684
Foreign Exchange And Interest Rate Risk [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Derivative Financial Assets Liabilities | 26 | 664
Commodity price risk [member] |  |
IfrsStatementLineItems [Line Items] |  |
Derivative Financial Assets Liabilities | 12 | 22
CDI & TJLP vs. US$ Fixed and Floating Rate Swap [Member] | Foreign Exchange And Interest Rate Risk [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Derivative Financial Assets Liabilities | (57) | 79
Ipca Swap [Member] | Foreign Exchange And Interest Rate Risk [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Derivative Financial Assets Liabilities | (57) | (41)
Dollar Swap [Member] | Foreign Exchange And Interest Rate Risk [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Derivative Financial Assets Liabilities | 130 | 650
SOFR Swap [Member] | Foreign Exchange And Interest Rate Risk [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Derivative Financial Assets Liabilities | 16 | (24)
Treasury Forwards [Member] | Foreign Exchange And Interest Rate Risk [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Derivative Financial Assets Liabilities | (6) |
Bunker Oil Gasoil And Brent [Member] | Commodity price risk [member] |  |
IfrsStatementLineItems [Line Items] |  |
Derivative Financial Assets Liabilities | 16 | 30
Energy Transition Materials [Member] | Commodity price risk [member] |  |
IfrsStatementLineItems [Line Items] |  |
Derivative Financial Assets Liabilities | (4) | (8)
Other Options [Member] | Commodity price risk [member] |  |
IfrsStatementLineItems [Line Items] |  |
Derivative Financial Assets Liabilities | $ (1) | $ (2)

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