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Risks Arising from Financial Instruments - Summary of Offsetting Financial Assets and Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Derivatives [member]    
Disclosure of detailed information about financial instruments [line items]    
Gross amount $ 728 $ 815
Net amount recognized in the statement of financial position 728 815
Other offsetting agreements (725) (814)
Total net amount 3 1
Derivative liabilities [member]    
Disclosure of detailed information about financial instruments [line items]    
Gross amount (6,397) (5,886)
Net amount recognized in the statement of financial position (6,397) (5,886)
Other offsetting agreements 725 814
Total net amount $ (5,672) $ (5,071)