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Segmental information - Reconciliation of underlying EBITDA to profit after taxation (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Disclosure of operating segments [line items]      
Profit after tax for the period $ 4,947 $ 9,448 [1]  
Taxation 1,983 2,867 [1]  
Profit before taxation 6,930 12,315 [1]  
Depreciation and amortisation in subsidiaries excluding capitalised depreciation 2,405 2,405  
Depreciation and amortisation in equity accounted units 238 242  
Finance items in subsidiaries 748 359  
Taxation and finance items in equity accounted units 373 363  
Gains on embedded commodity derivatives not qualifying for hedge accounting (including foreign exchange) (112) (14)  
Impairment charges 1,175 0 [1]  
Change in closure estimates (non-operating and fully impaired sites) (29) 43  
Gain recognised by Kitimat relating to LNG Canada's project 0 (116)  
Underlying EBITDA 11,728 15,597  
Capitalised depreciation $ 80 $ 54  
Close down restoration and environmental      
Disclosure of operating segments [line items]      
Actuarial assumption of discount rates 2.00% 1.50% 1.50%
[1] Comparative information has been restated to reflect the adoption of narrow scope amendments to IAS12 'Income Taxes', refer to note 2 for details.