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Impairment (Details 1) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]      
Impairment losses reversals $ 1,315 $ (3,190) $ 7,339
Property Plant And Equipment And Intangible Assets [Member]      
IfrsStatementLineItems [Line Items]      
Impairment losses reversals (1,164) 3,415 (7,354)
Property Plant And Equipment And Intangible Assets [Member] | Producing Properties Relating To Oil And Gas Activities In Brazil Several Cgus [Member]      
IfrsStatementLineItems [Line Items]      
Carrying amount 8,307 23,734 42,421
Recoverable amount 7,747 36,396 40,511
Impairment losses reversals $ (628) $ 3,373 $ (7,316)
Business segment E&P E&P E&P
Property Plant And Equipment And Intangible Assets [Member] | Oil And Gas Production And Drilling Equipment In Brazil [Member]      
IfrsStatementLineItems [Line Items]      
Carrying amount $ 486 $ 250 $ 120
Recoverable amount 7    
Impairment losses reversals $ (478) $ (250) $ (119)
Business segment E&P E&P E&P
Property Plant And Equipment And Intangible Assets [Member] | Itaborai Utilities [Member]      
IfrsStatementLineItems [Line Items]      
Carrying amount $ 919    
Recoverable amount 777    
Impairment losses reversals $ (142)    
Business segment Gas &Power    
Property Plant And Equipment And Intangible Assets [Member] | Second Refining Unit In R N E S T [Member]      
IfrsStatementLineItems [Line Items]      
Carrying amount $ 792 $ 404 $ 410
Recoverable amount 882 767 388
Impairment losses reversals $ 89 $ 359 $ (22)
Business segment RT&M RT&M RT&M
Property Plant And Equipment And Intangible Assets [Member] | Others [Member]      
IfrsStatementLineItems [Line Items]      
Impairment losses reversals $ (5) $ (67)  
Business segment Several Several  
Property Plant And Equipment And Intangible Assets [Member] | Comperj [Member]      
IfrsStatementLineItems [Line Items]      
Carrying amount     $ 266
Recoverable amount     526
Impairment losses reversals     $ 260
Business segment     RT&M
Property Plant And Equipment And Intangible Assets [Member] | Corporate Facilities [Member]      
IfrsStatementLineItems [Line Items]      
Carrying amount     $ 152
Impairment losses reversals     $ (161)
Business segment     Corporate, others
Property Plant And Equipment And Intangible Assets [Member] | Other [Member]      
IfrsStatementLineItems [Line Items]      
Impairment losses reversals     $ 2
Business segment     Several