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Investments (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]      
Proportion of ownership interest in subsidiary 80.00%    
Net income for the year $ 7,605 $ 24,995 $ 36,755
Exploration And Production Refining Transportation And Marketing Gas And Power And Distribution Segment [Member] | Petrobras International Braspetro Pibbv [Member] | Country Of Netherlands [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary Several    
Proportion of ownership interest in subsidiary 100.00%    
Proportion of voting rights held in subsidiary 100.00%    
Sales revenues $ 44,842    
Shareholders'equity (deficit) 59,836    
Net income for the year $ 3,668    
Country Netherlands    
Refining Transportation And Marketing Segment [Member] | Petrobras Transporte S A Transpetro [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary RT&M    
Proportion of ownership interest in subsidiary 100.00%    
Proportion of voting rights held in subsidiary 100.00%    
Sales revenues $ 2,227    
Shareholders'equity (deficit) 932    
Net income for the year $ 161    
Country Brazil    
Refining Transportation And Marketing Segment [Member] | Araucaria Nitrogenados S A [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary RT&M    
Proportion of ownership interest in subsidiary 100.00%    
Proportion of voting rights held in subsidiary 100.00%    
Shareholders'equity (deficit) $ 90    
Net income for the year $ 75    
Country Brazil    
Refining Transportation And Marketing Segment [Member] | Fabrica Carioca De Catalizadores S A F C C [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary RT&M    
Proportion of ownership interest in subsidiary 50.00%    
Proportion of voting rights held in subsidiary 50.00%    
Sales revenues $ 60    
Shareholders'equity (deficit) 47    
Net income for the year $ 22    
Country Brazil    
Refining Transportation And Marketing Segment [Member] | Logum Logistica S A [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary RT&M    
Proportion of ownership interest in subsidiary 30.00%    
Proportion of voting rights held in subsidiary 30.00%    
Shareholders'equity (deficit) $ 186    
Net income for the year $ (23)    
Country Brazil    
Refining Transportation And Marketing Segment [Member] | Petrocoque S A Industria E Comercio [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary RT&M    
Proportion of ownership interest in subsidiary 50.00%    
Proportion of voting rights held in subsidiary 50.00%    
Shareholders'equity (deficit) $ 23    
Net income for the year $ 4    
Country Brazil    
Refining Transportation And Marketing Segment [Member] | Refinaria De Petroleo Riograndense S A [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary RT&M    
Proportion of ownership interest in subsidiary 33.20%    
Proportion of voting rights held in subsidiary 33.33%    
Shareholders'equity (deficit) $ 5    
Net income for the year $ (16)    
Country Brazil    
Refining Transportation And Marketing Segment [Member] | Metanol Do Nordeste S A Metanor [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary RT&M    
Proportion of ownership interest in subsidiary 34.54%    
Proportion of voting rights held in subsidiary 50.00%    
Shareholders'equity (deficit) $ 20    
Net income for the year $ 6    
Country Brazil    
Refining Transportation And Marketing Segment [Member] | Companhia De Coque Calcinado De Petroleo S A Coquepar [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary RT&M    
Proportion of ownership interest in subsidiary 45.00%    
Proportion of voting rights held in subsidiary 45.00%    
Country Brazil    
Refining Transportation And Marketing Segment [Member] | Braskem S A [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary RT&M    
Proportion of ownership interest in subsidiary 36.15%    
Proportion of voting rights held in subsidiary 47.03%    
Shareholders'equity (deficit) $ (4)    
Net income for the year $ (1,053)    
Country Brazil    
Refining Transportation And Marketing Segment [Member] | Nitroclor Ltda [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary RT&M    
Proportion of ownership interest in subsidiary 38.80%    
Proportion of voting rights held in subsidiary 38.80%    
Country Brazil    
Exploration And Production Segment [Member] | Petrobras Logistica De Exploracao E Producao S A P B L O G [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary E&P    
Proportion of ownership interest in subsidiary 100.00%    
Proportion of voting rights held in subsidiary 100.00%    
Sales revenues $ 281    
Shareholders'equity (deficit) 60    
Net income for the year $ 99    
Country Brazil    
Biofuels Segment [Member] | Petrobras Biocombustivel S A [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary G&LCE    
Proportion of ownership interest in subsidiary 100.00%    
Proportion of voting rights held in subsidiary 100.00%    
Sales revenues $ 242    
Shareholders'equity (deficit) 135    
Net income for the year $ 13    
Country Brazil    
Gas And Power Segment [Member] | Termomacae Ltda [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary G&LCE    
Proportion of ownership interest in subsidiary 100.00%    
Proportion of voting rights held in subsidiary 100.00%    
Sales revenues $ 11    
Shareholders'equity (deficit) 48    
Net income for the year $ 7    
Country Brazil    
Gas And Power Segment [Member] | Termobahia S A [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary G&LCE    
Proportion of ownership interest in subsidiary 98.85%    
Proportion of voting rights held in subsidiary 98.85%    
Shareholders'equity (deficit) $ 56    
Net income for the year $ 10    
Country Brazil    
Gas And Power Segment [Member] | Baixada Santista Energia S A [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary G&LCE    
Proportion of ownership interest in subsidiary 100.00%    
Proportion of voting rights held in subsidiary 100.00%    
Shareholders'equity (deficit) $ 53    
Net income for the year $ 8    
Country Brazil    
Gas And Power Segment [Member] | Transportadora Brasileira Gasoduto Brasil Bolivia [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary G&LCE    
Proportion of ownership interest in subsidiary 51.00%    
Proportion of voting rights held in subsidiary 51.00%    
Sales revenues $ 313    
Shareholders'equity (deficit) 61    
Net income for the year $ 85    
Country Brazil    
Gas And Power Segment [Member] | Brasympe Energia S A [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary G&LCE    
Proportion of ownership interest in subsidiary 20.00%    
Proportion of voting rights held in subsidiary 20.00%    
Shareholders'equity (deficit) $ 13    
Net income for the year $ 3    
Country Brazil    
Gas And Power Segment [Member] | Energetica S U A P E I I [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary G&LCE    
Proportion of ownership interest in subsidiary 20.00%    
Proportion of voting rights held in subsidiary 20.00%    
Shareholders'equity (deficit) $ 84    
Net income for the year $ 32    
Country Brazil    
Gas And Power Segment [Member] | Bioenergetica Britaruma S A [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary G&LCE    
Proportion of ownership interest in subsidiary 30.00%    
Proportion of voting rights held in subsidiary 30.00%    
Country Brazil    
Gas And Power Segment [Member] | Transportadora Sulbrasileirade Gas T S B [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary G&LCE    
Proportion of ownership interest in subsidiary 25.00%    
Proportion of voting rights held in subsidiary 25.00%    
Shareholders'equity (deficit) $ 2    
Net income for the year $ 1    
Country Brazil    
Corporate Segment [Member] | Braspetro Oil Services Company Brasoil [Member] | Country Of Cayman Islands [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary Corporate, others    
Proportion of ownership interest in subsidiary 100.00%    
Proportion of voting rights held in subsidiary 100.00%    
Shareholders'equity (deficit) $ 2    
Country Cayman Islands    
Corporate Segment [Member] | Fundo De Investimento Imobiliario R B Logistica F I I [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary Corporate, others    
Proportion of ownership interest in subsidiary 99.15%    
Proportion of voting rights held in subsidiary 99.15%    
Shareholders'equity (deficit) $ 18    
Net income for the year $ 5    
Country Brazil    
Corporate Segment [Member] | Procurement Negocios Eletronicos S A [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary Corporate, others    
Proportion of ownership interest in subsidiary 72.00%    
Proportion of voting rights held in subsidiary 49.00%    
Sales revenues $ 14    
Shareholders'equity (deficit) 6    
Net income for the year $ 1    
Country Brazil    
Corporate Segment [Member] | Petrobras Comercializadora De Energia Ltda P B E N [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Proportion of ownership interest in subsidiary 100.00%    
Proportion of voting rights held in subsidiary 100.00%    
Sales revenues $ 29    
Shareholders'equity (deficit) 12    
Net income for the year $ 5    
Country Brazil    
Corporate Segment [Member] | Associacao Petrobras De Saude [Member] | Countries Of Domicile [Member]      
IfrsStatementLineItems [Line Items]      
Name of subsidiary Corporate, others    
Proportion of ownership interest in subsidiary 93.47%    
Proportion of voting rights held in subsidiary 93.47%    
Sales revenues $ 892    
Shareholders'equity (deficit) 117    
Net income for the year $ 5    
Country Brazil