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Additional Information - Summary of Movement in Changes in the Standardised Measure (Detail) - Exploration and evaluation assets [member] - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Detailed Information About Changes In Standardised Measure [Line Items]      
Standardised measure at the beginning of the year $ 15,737 $ 5,084 $ 10,324
Prices, net of production costs 22,558 7,741 (5,800)
Changes in future development costs (873) 20 (29)
Revisions of reserves quantity estimates 5,898 2,109 269
Accretion of discount 4,051 430 1,038
Changes in production timing and other 2,371 3,485 (1,180)
Sales of oil and gas, net of production costs (10,202) (5,698) (2,666)
Acquisitions of reserves-in-place 28,309    
Sales of reserves-in-place 0    
Previously estimated development costs incurred 3,339 565 702
Extensions, discoveries, and improved recoveries, net of future costs   8,346 44
Changes in future income taxes (17,045) (6,345) 2,382
Standardised measure at the end of the year $ 54,143 $ 15,737 $ 5,084