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Disposal of assets and other transactions (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Cash and cash equivalents $ 13
Trade receivables 31
Inventories 21 73
Investments 210
Property, plant and equipment 3,587 1,975
Others 188
Total 3,608 2,490
Trade payables 2
Finance debt 133 1
Provision for decommissioning costs 1,332 833
Others 31
Total 1,465 $ 867
Refining Transportation And Marketing Segment [Member]    
IfrsStatementLineItems [Line Items]    
Inventories 21  
Property, plant and equipment 19  
Total 40  
Exploration And Production Segment [Member]    
IfrsStatementLineItems [Line Items]    
Property, plant and equipment 3,568  
Total 3,568  
Provision for decommissioning costs 1,332  
Total 1,332  
Corporate And Other Business [Member]    
IfrsStatementLineItems [Line Items]    
Finance debt 133  
Total $ 133