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Loans, borrowings, leases, cash and cash equivalents and short-term investments - Total debt (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Non-current portion of non-current borrowings. gross $ 11,704 $ 10,874
Current borrowings. gross 713 307
Accrued charges $ 156 147
Quoted In Secondary Market [Member] | Bond [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate [1] 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 [1],[2] 10.07%  
Current borrowings. gross [2] $ 95 47
Quoted In Secondary Market [Member] | Eurobonds [Member]    
IfrsStatementLineItems [Line Items]    
Non-current portion of non-current borrowings. gross [2] 132 186
Debt Contract Brazil [Member] | U S D [Member]    
IfrsStatementLineItems [Line Items]    
Non-current portion of non-current borrowings. gross 4,112 4,212
Current borrowings. gross 400 54
Debt Contract Brazil [Member] | Currencies Other Than U S Dollar And Brazilian Real [Member]    
IfrsStatementLineItems [Line Items]    
Non-current portion of non-current borrowings. gross $ 9 9
Debt Contract Brazil [Member] | Tjlp Tr Ipca Igp M And Cdi [Member] | B R L [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate [1],[3] 10.62%  
Non-current portion of non-current borrowings. gross [3] $ 226 232
Current borrowings. gross [3] $ 50 46
Debt Contract Brazil [Member] | Fixed interest rate [member] | B R L [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate [1],[3] 3.04%  
Current borrowings. gross [3]   2
Debt Contract Brazil [Member] | Fixed interest rate [member] | Currencies Other Than U S Dollar And Brazilian Real [Member]    
IfrsStatementLineItems [Line Items]    
Non-current portion of non-current borrowings. gross $ 68 78
Current borrowings. gross $ 12 $ 11
Debt Contracts International Markets [Member] | U S D [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate [1] 5.37%  
Debt Contracts International Markets [Member] | Currencies Other Than U S Dollar And Brazilian Real [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate [1] 4.10%  
Debt Contracts International Markets [Member] | Fixed interest rate [member] | Currencies Other Than U S Dollar And Brazilian Real [Member]    
IfrsStatementLineItems [Line Items]    
Borrowings, interest rate [1] 3.87%  
[1] In order to determine the average interest rate for debt contracts with floating rates, the Company used the rate applicable as of June 30, 2023.
[2] The Company has debentures in Brazil obtained for the Company's infrastructure investment projects.
[3] The Company entered into derivatives to mitigate the exposure to cash flow variations of all floating rate debt contracted in Brazil, resulting in an average cost of 3.42% per year in US$.