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Impairment of Exploration and Evaluation and Oil and Gas Properties - Summary of Nominal Brent Oil Prices (Parenthetical) (Detail) - 2022 Real Terms [member] - bbl
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
2024 [member]    
Disclosure nominal brent oil prices explanatory [line items]    
Nominal price per barrel of crude oil   65
Prices of barrel per crude oil escalation percentage annually   2.00%
2025 [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%
2026 [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%