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Exploration and evaluation of oil and gas reserves (Details Narrative) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Oct. 31, 2023
IfrsStatementLineItems [Line Items]      
Recognition of losses in Intangible assets $ 224 $ 364 $ 37
Agreement commits to investing 160 990  
Collateral for crude oil exploration concession agreements, amount 1,250 1,770  
Marlim [Member]      
IfrsStatementLineItems [Line Items]      
Assets pledged as collateral 1,239 1,756  
Buzios [Member]      
IfrsStatementLineItems [Line Items]      
Assets pledged as collateral 11 $ 14  
Tres Marias [Member]      
IfrsStatementLineItems [Line Items]      
Recognition of losses in Intangible assets     $ 6
BMC 33 [Member]      
IfrsStatementLineItems [Line Items]      
Property plant and equipment 968    
Sepia Field [Member]      
IfrsStatementLineItems [Line Items]      
Property plant and equipment $ 46