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Impairment Of Exploration And Evaluation, Property, Plant And Equipment And Goodwill - Summary of Nominal Brent Oil Prices (Parenthetical) (Detail) - bbl
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
2024 Real Terms [member] | 2027 [member]    
Disclosure nominal brent oil prices explanatory [line items]    
Nominal price per barrel of crude oil 78  
Prices of barrel per crude oil escalation percentage annually 2.00%  
2022 Real Terms [member] | 2025 [member]    
Disclosure nominal brent oil prices explanatory [line items]    
Nominal price per barrel of crude oil   70
Prices of barrel per crude oil escalation percentage annually   2.00%
2022 Real Terms [member] | 2026 [member]    
Disclosure nominal brent oil prices explanatory [line items]    
Nominal price per barrel of crude oil 70 70
Prices of barrel per crude oil escalation percentage annually 2.00% 2.00%