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Financial risk management (Details 3) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Notional value $ 65,900  
Fair value of derivative financial assets (liability) (101) $ 20
Exchange Rate Risk [Member] | Cross-currency swap - CDI x US$ [Member] | Derivatives Not Designated For Hedge Accounting [Member]    
IfrsStatementLineItems [Line Items]    
Notional value 488 729
Fair value of derivative financial assets (liability) $ (105) (49)
Maturity 2029  
Exchange Rate Risk [Member] | Short Position Foreign Currency Forwards [Member] | Derivatives Not Designated For Hedge Accounting [Member]    
IfrsStatementLineItems [Line Items]    
Notional value $ (20) (1)
Maturity 2025  
Interest rate risk [member] | Swap contract [member] | Derivatives Not Designated For Hedge Accounting [Member]    
IfrsStatementLineItems [Line Items]    
Notional value $ 3,008 3,008
Fair value of derivative financial assets (liability) $ 17 68
Maturity 2029/2034  
Price Risk [Member] | Future Contracts Crude Oil And Oil Products [Member] | Derivatives Not Designated For Hedge Accounting [Member]    
IfrsStatementLineItems [Line Items]    
Notional value $ (1,450) (1,053)
Fair value of derivative financial assets (liability) $ (13) 1
Maturity 2025  
Price Risk [Member] | Swap Short Position Soyabean Oil [Member] | Derivatives Not Designated For Hedge Accounting [Member]    
IfrsStatementLineItems [Line Items]    
Notional value   $ (1)