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Loans, borrowings, cash and cash equivalents and short-term investments (Details 2) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Non-current portion of non-current borrowings. gross $ 11,647 $ 10,874
Current borrowings. gross 824 307
Accrued charges $ 167 147
Quoted In Secondary Market [Member] | Bond [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate 6.02%  
Non-current portion of non-current borrowings. gross $ 7,157 6,157
Quoted In Secondary Market [Member] | Debentures [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate 10.17%  
Non-current portion of non-current borrowings. gross $ 119 186
Current borrowings. gross $ 96 47
Debt Contract Brazil [Member] | Tjlp Tr Ipca Igp M And Cdi [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate 10.12%  
Non-current portion of non-current borrowings. gross $ 200 232
Current borrowings. gross $ 49 46
Debt Contract Brazil [Member] | Fixed interest rate [member]    
IfrsStatementLineItems [Line Items]    
Current borrowings. gross   2
Debt Contract Brazil [Member] | S O F R [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate 6.80%  
Non-current portion of non-current borrowings. gross $ 150  
Debt Contracts International Markets [Member] | Fixed interest rate [member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate 3.87%  
Non-current portion of non-current borrowings. gross $ 67 78
Current borrowings. gross $ 12 11
Debt Contracts International Markets [Member] | Currencieswith Variable And Fixed Interest [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate 5.59%  
Non-current portion of non-current borrowings. gross $ 3,945 4,212
Current borrowings. gross $ 500 54
Debt Contracts International Markets [Member] | Other Currencies With Variable Interest [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate 4.12%  
Non-current portion of non-current borrowings. gross $ 9 $ 9