Financial Instruments - Derivative Instruments Which Were Not Designated as Hedging Instruments (Detail) - Foreign currency forward contracts - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative Settlements	$ (40)	$ 16	$ (58)	$ 131
Amount of Gain (Loss) Recognized in Income on Changes in Fair Value	$ 6	$ (41)	$ (55)	$ 25

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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