Financial Instruments - Gain (Loss) on Derivative and Non-Derivative Instruments (Details) - 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]
Total	$ (48)	$ 472	$ 1,872	$ (2,154)
Foreign exchange derivatives \| Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Amount included in the assessment of effectiveness	(60)	278	496	(1,111)
Amount excluded from the assessment of effectiveness	6	128	74	(41)
Foreign exchange derivatives \| Net investment hedges
Derivative Instruments, Gain (Loss) [Line Items]
Amount excluded from the assessment of effectiveness	0	0	(15)	0
Foreign exchange derivatives	(103)	55	404	(794)
Interest rate derivatives \| Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Amount included in the assessment of effectiveness	105	0	105	0
Foreign currency-denominated debt \| Net investment hedges
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange derivatives	$ 4	$ 11	$ 808	$ (208)

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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