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Property Plant and Equipment - Summary of Changes in Property Plant and Equipment (Parenthetical) (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
well
Well
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 23, 2024
well
Disclosure of detailed information about property, plant and equipment [line items]        
Mineral property $ 144 $ 269 $ 333  
Exploratory wells in progress | well 9      
Drilled wells | Well 8      
Charged to exploratory expense | well 13      
Transferred to proved properties | well       12
Net book value charged to Property, plant and equipment provisions $ 2 4 1  
Increase/(Decrease) of cost of Property, plant and equipment 169 507 268  
Depreciation of property plant and equipment 2,446 3,016 2,551  
Cost increases of short-term leases 31 57 44  
Cost increases of variable charge of leases related to the underlying asset return/use 21 6 5  
Capitalization of depreciation of right-of-use assets 61 68 57  
Capitalization of financial accretion for lease liabilities 10 13 14  
Cost [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Reclassification of assets held for disposal 28,586      
Accumulated depreciation [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Reclassification of assets held for disposal $ 24,915      
Hydrocarbon Wells Abandonmnet [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Depreciation of property plant and equipment   $ 13 $ 19