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Finance debt (Details 6)
$ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
Foreign countries [member]  
IfrsStatementLineItems [Line Items]  
Available (Lines of Credit) $ 8,250
Balance 8,250
Brazil [Member]  
IfrsStatementLineItems [Line Items]  
Available (Lines of Credit) 829
Balance $ 829
Syndicate Of Banks [Member] | Foreign countries [member] | Petrobras Global Trading B V [Member]  
IfrsStatementLineItems [Line Items]  
Date 12/16/2021
Maturity 11/16/2026
Available (Lines of Credit) $ 5,000
Balance $ 5,000
Syndicate Of Banks Two [Member] | Foreign countries [member] | Petrobras Global Trading B V [Member]  
IfrsStatementLineItems [Line Items]  
Date 3/27/2019
Maturity 2/27/2024
Available (Lines of Credit) $ 3,250
Balance $ 3,250
Banco Do Brasil [Member] | Brazil [Member] | Petroleo Brasileiro Sa [Member]  
IfrsStatementLineItems [Line Items]  
Date 3/23/2018
Maturity 9/26/2026
Available (Lines of Credit) $ 383
Balance $ 383
Bradesco [Member] | Brazil [Member] | Petroleo Brasileiro Sa [Member]  
IfrsStatementLineItems [Line Items]  
Date 10/4/2018
Maturity 9/5/2025
Available (Lines of Credit) $ 383
Balance $ 383
Caixa Economica Federal [Member] | Brazil [Member] | Petroleo Brasileiro Sa [Member]  
IfrsStatementLineItems [Line Items]  
Date 11/23/2010
Available (Lines of Credit) $ 63
Balance $ 63