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Risks Arising from Financial Instruments - Summary of Allowance for Impairment (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of impairment loss and reversal of impairment loss [line items]      
Impairment losses   $ 66  
Impairment losses [member]      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Beginning balance $ (438) (462) $ (416)
Impairment losses (53) (56) (54)
Derecognition 64 24 26
Currency translation and other (40) 55 (18)
Ending balance $ (468) $ (438) $ (462)