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Loans, borrowings, cash and cash equivalents and short-term investments (Details 2) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Current borrowings, gross $ 1,020 $ 824
Non-current portion of non-current borrowings, gross 13,772 11,647
Accrued charges $ 184 167
Quoted In Secondary Market [Member] | Bond [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate 6.04%  
Current borrowings, gross
Non-current portion of non-current borrowings, gross $ 7,187 7,157
Quoted In Secondary Market [Member] | Debentures [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate 7.28%  
Current borrowings, gross $ 68 96
Non-current portion of non-current borrowings, gross $ 1,191 119
Debt Contract Brazil [Member] | TJLP, TR, IPCA, IGP-M and CDI [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate 8.19%  
Current borrowings, gross $ 41 49
Non-current portion of non-current borrowings, gross $ 143 200
Debt Contract Brazil [Member] | SOFR [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate 9.92%  
Non-current portion of non-current borrowings, gross $ 150 150
Debt Contracts International Markets [Member] | Currencieswith Variable And Fixed Interest [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate 5.35%  
Current borrowings, gross $ 716 500
Non-current portion of non-current borrowings, gross $ 5,042 3,945
Debt Contracts International Markets [Member] | Other Currencies With Variable Interest [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate 3.94%  
Non-current portion of non-current borrowings, gross $ 9 9
Debt Contracts International Markets [Member] | Fixed interest rate [member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate 4.47%  
Current borrowings, gross $ 11 12
Non-current portion of non-current borrowings, gross $ 50 $ 67