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Intangible assets (Details Narrative)
$ / shares in Units, R$ in Millions, $ in Millions
1 Months Ended 12 Months Ended
Dec. 31, 2023
USD ($)
$ / shares
Dec. 31, 2023
USD ($)
$ / shares
Dec. 31, 2023
BRL (R$)
Dec. 31, 2022
USD ($)
IfrsStatementLineItems [Line Items]        
Accruals $ 5,244 $ 5,244    
Other income and expenses   693    
Contract provision 384 384    
Accrual 309 309    
Earn out price   44    
Earn out received 371 371    
Additional earn out price   241    
Signature bonus 146      
Basins returned $ 414 $ 414   $ 2,006
Shell Brasil [Member]        
IfrsStatementLineItems [Line Items]        
Interest rate 40.00% 40.00%    
Petrobras [Member]        
IfrsStatementLineItems [Line Items]        
Interest rate 60.00% 60.00%    
Petrobras [Member] | Twenty Six Blocks [Member]        
IfrsStatementLineItems [Line Items]        
Interest rate 70.00% 70.00%    
Petrobras [Member] | Three Blocks [Member]        
IfrsStatementLineItems [Line Items]        
Interest rate 50.00% 50.00%    
Agua Marinha [Member] | Agua Marinha Petrobra [Member]        
IfrsStatementLineItems [Line Items]        
Interest rate 30.00% 30.00%    
Agua Marinha [Member] | Total Energies [Member]        
IfrsStatementLineItems [Line Items]        
Interest rate 30.00% 30.00%    
Agua Marinha [Member] | Petronas [Member]        
IfrsStatementLineItems [Line Items]        
Interest rate 20.00% 20.00%    
Agua Marinha [Member] | Qatar Energy [Member]        
IfrsStatementLineItems [Line Items]        
Interest rate 20.00% 20.00%    
Shell [Member] | Twenty Six Blocks [Member]        
IfrsStatementLineItems [Line Items]        
Interest rate 30.00% 30.00%    
Shell [Member] | Three Blocks [Member]        
IfrsStatementLineItems [Line Items]        
Interest rate 30.00% 30.00%    
CNOOC Brasil [member] | Three Blocks [Member]        
IfrsStatementLineItems [Line Items]        
Interest rate 20.00% 20.00%    
Minimum [Member]        
IfrsStatementLineItems [Line Items]        
Average price | $ / shares $ 40.00 $ 40.00    
Maximum [Member]        
IfrsStatementLineItems [Line Items]        
Average price | $ / shares $ 70.00 $ 70.00    
Sudoeste De Sagitario [Member]        
IfrsStatementLineItems [Line Items]        
Signature bonus   $ 4    
Agua Marinha [Member]        
IfrsStatementLineItems [Line Items]        
Signature bonus   40    
Norte De Brava [Member]        
IfrsStatementLineItems [Line Items]        
Signature bonus   $ 102    
Petrobras [Member]        
IfrsStatementLineItems [Line Items]        
Signature bonus $ 24   R$ 116  
Transfer Of Rights Agreement And Production Sharing Contract [Member]        
IfrsStatementLineItems [Line Items]        
Description of exploration rights   Petrobras signed the Production Sharing Contract for the surplus volume of the Transfer of Rights Agreement related to the Atapu field, in partnership with Shell Brasil Petróleo Ltda (25% interest) and TotalEnergies EP Brasil Ltda. (22.5% interest), and related to the Sépia field in consortium with TotalEnergies (28% interest), Petronas Petróleo Brasil Ltda. (21% interest) and QP Brasil Ltda. (21% interest), according to the results of the Second Bidding Round for the Surplus Volume of the Transfer of Rights Agreement in the Production Sharing regime, which was held on December 17, 2021. Petrobras signed the Production Sharing Contract for the surplus volume of the Transfer of Rights Agreement related to the Atapu field, in partnership with Shell Brasil Petróleo Ltda (25% interest) and TotalEnergies EP Brasil Ltda. (22.5% interest), and related to the Sépia field in consortium with TotalEnergies (28% interest), Petronas Petróleo Brasil Ltda. (21% interest) and QP Brasil Ltda. (21% interest), according to the results of the Second Bidding Round for the Surplus Volume of the Transfer of Rights Agreement in the Production Sharing regime, which was held on December 17, 2021.  
Transfer Of Rights Agreement And Production Sharing Contract [Member] | Atapu [Member]        
IfrsStatementLineItems [Line Items]        
Compensation paid by partners   $ 2,093    
Transfer Of Rights Agreement And Production Sharing Contract [Member] | Sepia [Member]        
IfrsStatementLineItems [Line Items]        
Compensation paid by partners   $ 3,059