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Loans, borrowings, leases, cash and cash equivalents and short-term investments - Total debt (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Non-current portion of non-current borrowings. gross $ 10,874 $ 11,150
Current borrowings. gross 307 1,030
Accrued charges $ 147 158
Quoted In Secondary Market [Member] | Bond [Member]    
IfrsStatementLineItems [Line Items]    
Average interest rate [1] 6.00%  
Non-current portion of non-current borrowings. gross $ 6,157 7,448
Quoted In Secondary Market [Member] | Eurobonds [Member]    
IfrsStatementLineItems [Line Items]    
Average interest rate [1],[2] 10.09%  
Non-current portion of non-current borrowings. gross [2] $ 186 201
Current borrowings. gross [2] 47 186
Debt Contract Brazil [Member] | United States of America, Dollars    
IfrsStatementLineItems [Line Items]    
Non-current portion of non-current borrowings. gross 4,212 3,136
Current borrowings. gross 54 479
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 10
Current borrowings. gross   77
Debt Contract Brazil [Member] | Tjlp Tr Ipca Igp M And Cdi [Member] | Brazil, Brazil Real    
IfrsStatementLineItems [Line Items]    
Average interest rate [1],[3] 10.62%  
Non-current portion of non-current borrowings. gross [3] $ 232 259
Current borrowings. gross [3] $ 46 95
Debt Contract Brazil [Member] | Fixed interest rate [member] | Brazil, Brazil Real    
IfrsStatementLineItems [Line Items]    
Average interest rate [1],[3] 3.04%  
Non-current portion of non-current borrowings. gross [3]   1
Current borrowings. gross [3] $ 2 12
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 78 95
Current borrowings. gross $ 11 12
Debt Contract Brazil [Member] | L I B O R [Member]    
IfrsStatementLineItems [Line Items]    
Average interest rate [1],[3] 2.32%  
Current borrowings. gross [3]   $ 11
Debt Contracts International Markets [Member] | United States of America, Dollars    
IfrsStatementLineItems [Line Items]    
Average interest rate [1] 5.03%  
Debt Contracts International Markets [Member] | Currencies Other Than U S Dollar And Brazilian Real [Member]    
IfrsStatementLineItems [Line Items]    
Average 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]    
Average interest rate [1] 3.59%  
[1] In order to determine the average interest rate for debt contracts with floating rates, the Company used the rate applicable at December 31, 2022.
[2] The Company has debentures in Brazil with BNDES 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 3.59% per year in US$.