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Exploration and evaluation of oil and gas reserves (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Property plant and equipment    
Balance at December 31, 2022 $ 153,424 $ 130,169
Additions 9,375 12,188
Balance at June 30, 2023 135,951 146,632
Intangible assets    
Opening Balance 3,042  
Transfers 4 1
Closing Balance 2,688  
Capitalized Exploratory Well Costs / Capitalized Acquisition Costs 3,487 4,857
Capitalised development expenditure [member]    
Intangible assets    
Opening Balance 2,313 2,406
Additions 147
Write-offs (36)
Transfers (31)
Translation adjustment (299) 227
Closing Balance 2,014 2,713
Capitalized Acquistion Costs [Member]    
Property plant and equipment    
Balance at December 31, 2022 1,512 1,876
Additions 184 158
Write-offs (25) (1)
Transfers (44)
Translation adjustment (198) 155
Balance at June 30, 2023 $ 1,473 $ 2,144