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Additional Information - Summary of Movement in Changes in the Standardised Measure (Detail) - Exploration and evaluation assets and Oil and gas assets [member] - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Detailed Information About Changes In Standardised Measure [Line Items]      
Standardised measure at the beginning of the year $ 54,143 $ 15,737 $ 5,084
Prices, net of production costs (41,132) 22,558 7,741
Changes in future development costs (2,288) (873) 20
Revisions of reserves quantity estimates 3,156 5,898 2,109
Accretion of discount 8,039 4,051 430
Changes in production timing and other (707) 2,371 3,485
Sales of oil and gas, net of production costs (10,500) (10,202) (5,698)
Acquisitions of reserves-in-place   28,309  
Sales of reserves-in-place 0    
Previously estimated development costs incurred 5,276 3,339 565
Extensions, discoveries, and improved recoveries, net of future costs 1,174   8,346
Changes in future income taxes 14,992 (17,045) (6,345)
Standardised measure at the end of the year $ 32,153 $ 54,143 $ 15,737