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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