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Disposal of assets and other transactions (Details 5) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]      
Cash received $ 624 $ 1,930 $ 1,060
Cash in subsidiary before losing control (44) (134) (10)
Net Proceeds 580 1,796 1,050
Gaspetro M [Member]      
IfrsStatementLineItems [Line Items]      
Cash received 391    
Cash in subsidiary before losing control (22)    
Net Proceeds 369    
R E M A N [Member]      
IfrsStatementLineItems [Line Items]      
Cash received 233    
Cash in subsidiary before losing control (22)    
Net Proceeds $ 211    
Matarip Refinery R L A M [Member]      
IfrsStatementLineItems [Line Items]      
Cash received   1,868  
Cash in subsidiary before losing control   (119)  
Net Proceeds   1,749  
P U D S A [Member]      
IfrsStatementLineItems [Line Items]      
Cash received   62  
Cash in subsidiary before losing control   (15)  
Net Proceeds   $ 47  
Petrobras Paraguay [Member]      
IfrsStatementLineItems [Line Items]      
Cash received     276
Net Proceeds     276
Liquigas [Member]      
IfrsStatementLineItems [Line Items]      
Cash received     784
Cash in subsidiary before losing control     (10)
Net Proceeds     $ 774