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Financial assets and liabilities - Hierarchy of fair value (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
IfrsStatementLineItems [Line Items] |  |
Financial assets | $ 4,387 | $ 3,532
Financial liabilities | 3,104 | 4,796
Derivatives [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial liabilities | 276 | 835
Participative Stockholders Debentures Noncurrent [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial liabilities | 2,725 | 3,419
Financial Guarantees [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial liabilities | 103 | 542
Shorts Term Investments [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets | 61 | 184
Derivatives [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets | 538 | 131
Accounts Receivable Current [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets | 3,781 | 3,211
Investments In Equity Securities Noncurrent [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets | 7 | 6
Level 1 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets | 68 | 190
Level 1 of fair value hierarchy [member] | Shorts Term Investments [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets | 61 | 184
Level 1 of fair value hierarchy [member] | Investments In Equity Securities Noncurrent [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets | 7 | 6
Level 2 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets | 4,319 | 3,329
Financial liabilities | 3,104 | 4,796
Level 2 of fair value hierarchy [member] | Derivatives [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial liabilities | 276 | 835
Level 2 of fair value hierarchy [member] | Participative Stockholders Debentures Noncurrent [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial liabilities | 2,725 | 3,419
Level 2 of fair value hierarchy [member] | Financial Guarantees [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial liabilities | 103 | 542
Level 2 of fair value hierarchy [member] | Derivatives [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets | 538 | 118
Level 2 of fair value hierarchy [member] | Accounts Receivable Current [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets | $ 3,781 | 3,211
Level 3 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets |  | 13
Level 3 of fair value hierarchy [member] | Derivatives [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets |  | $ 13

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