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Property, Plant and Equipment - Summary of Cost for Exploratory Wells (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2023
USD ($)
Project
Well
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Disclosure of Property, Plant and Equipment Cost for Exploratory Wells under Assessment [line items]      
Amount $ 3,979 $ 2,315 $ 1,408
Exploration wells [member] | From 1 to 5 years [member]      
Disclosure of Property, Plant and Equipment Cost for Exploratory Wells under Assessment [line items]      
Amount $ 10    
Number of projects | Project 5    
Number of Wells | Well 5