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Impairment (Details Narrative) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
IfrsStatementLineItems [Line Items]    
Net impairment losses $ 404 $ 167
Accumulated impairment [member]    
IfrsStatementLineItems [Line Items]    
Net impairment losses $ 383  
Accumulated impairment [member] | Cash Generating Unit [Member]    
IfrsStatementLineItems [Line Items]    
Net impairment losses   52
Accumulated impairment [member] | Producing Properties Relating To Oil And Gas Activities Brazil [Member]    
IfrsStatementLineItems [Line Items]    
Net impairment losses   51
Accumulated impairment [member] | Cash Generating Unit One [Member]    
IfrsStatementLineItems [Line Items]    
Net impairment losses   $ 44