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Other Financial Assets and Liabilities - Additional Information (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
bbl
Dec. 31, 2023
USD ($)
Other financial assets and liabilities [line items]    
Gain (loss) on hedge ineffectiveness recognised in profit or loss $ 5 $ 15
Derivative financial liabilities $ 349 35
2026 [member]    
Other financial assets and liabilities [line items]    
Percentage of hedged pricing risk 67.00%  
2025 [member]    
Other financial assets and liabilities [line items]    
Percentage of hedged pricing risk 94.00%  
Hedging instrument, assets $ 30  
Oil Swaps [Member]    
Other financial assets and liabilities [line items]    
Oil and gas sale price | bbl 78.7  
Embedded Derivatives [Member] | Financial liabilities at fair value through profit or loss, category [member] | Long Term Sale And Gas Purchase Contract With Perdman [Member]    
Other financial assets and liabilities [line items]    
Gain loss on financial liabilities at fair value through profit or loss $ 314 35
Derivative financial liabilities $ 349 $ 35
Discount rate, measurement input [member] | Top of range [member] | Embedded Derivatives [Member] | Financial liabilities at fair value through profit or loss, category [member] | Long Term Sale And Gas Purchase Contract With Perdman [Member]    
Other financial assets and liabilities [line items]    
Discount rate pre tax 6.95 7.12
Discount rate, measurement input [member] | Bottom of range [member] | Embedded Derivatives [Member] | Financial liabilities at fair value through profit or loss, category [member] | Long Term Sale And Gas Purchase Contract With Perdman [Member]    
Other financial assets and liabilities [line items]    
Discount rate pre tax 5.8 5.39
Inflation Rate [Member] | Embedded Derivatives [Member] | Financial liabilities at fair value through profit or loss, category [member] | Long Term Sale And Gas Purchase Contract With Perdman [Member]    
Other financial assets and liabilities [line items]    
Discount rate pre tax 2.5 2.5