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Income Taxes - Summary of Income Taxes (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Income Taxes [line items]      
Current year $ (3,349) $ (3,252) $ (2,828)
(Underprovided)/overprovided in prior years 78 (211) (95)
Current tax expense (3,271) (3,463) (2,923)
Origination and reversal of temporary differences 614 482 855
Recognition/(de-recognition) of deferred tax assets on tax losses (carried forward) (193) (171) (166)
Deferred tax (expense)/income 420 311 689
Total tax expense $ (2,850) $ (3,152) $ (2,234)