v3.26.1
Income Taxes - Summary of Reconciliation of Effective Tax Rate with Aggregated Weighted Nominal Tax Rate (Detail) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Disclosure Of Income Taxes [line items]    
Profit/(loss) before tax $ 8,765 $ 5,972
Deduct share of results of associates 148 135
Deduct exceptional share of results of associates 0 9
Profit before tax and before share of results of associates 8,617 5,828
Adjustments to the tax basis    
Government incentives (57) (60)
Non-deductible/(non-taxable) mark-to-market on derivatives (2,033) (339)
Other expenses not deductible for tax purposes 705 534
Other non-taxable income (148) (348)
Adjusted tax basis $ 7,084 $ 5,616
Aggregate weighted nominal tax rate 26.40% 26.20%
Tax at aggregated nominal tax rate $ (1,871) $ (1,471)
Adjustments on tax expense    
Recognition/(de-recognition) of deferred tax assets on tax losses (carried forward) (2) (56)
(Underprovided)/overprovided in prior years 16 20
Deductions from interest on equity 148 102
Deductions from goodwill and other tax deductions 331 260
Withholding taxes (283) (253)
Other tax adjustments (43) (7)
Total tax expense $ (1,704) $ (1,404)
Effective tax rate 19.80% 24.10%