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Disposal of assets and other transactions (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Inventories $ 21
Investments
Property, plant and equipment 335 3,587
Total 335 3,608
Finance debt 99 133
Provision for decommissioning costs 442 1,332
Total 541 $ 1,465
Exploration And Production Segment [Member]    
IfrsStatementLineItems [Line Items]    
Property, plant and equipment 335  
Total 335  
Provision for decommissioning costs 442  
Total 442  
Corporate And Other Business [Member]    
IfrsStatementLineItems [Line Items]    
Finance debt 99  
Total $ 99