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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$.

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