Segment Information - Reconciliation of Segments Operating Income to Consolidated Income (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Operating Income	$ 8,105	$ 5,926	$ 24,255	$ 21,265
Acquisition and integration related charges	(52)	0	(52)	0
Severance charges	0	(1,733)	0	(1,733)
Other components of net periodic benefit charges	(8)	(8)	(24)	(25)
Asset and business rationalization	0	(374)	0	(374)
Legacy legal matter	0	0	0	(106)
Equity in losses of unconsolidated businesses	(6)	(24)	(3)	(47)
Other income, net	92	72	292	198
Interest expense	(1,664)	(1,672)	(4,935)	(5,005)
Income Before Provision For Income Taxes	6,527	4,302	19,609	16,411
Operating Segments
Segment Reporting Information [Line Items]
Operating Income	8,301	8,169	24,670	24,044
Corporate and other
Segment Reporting Information [Line Items]
Operating Income	$ (136)	$ (128)	$ (339)	$ (541)

Amount of expense for integration-related cost incurred in connection with business combination. Includes system integration and conversion costs; severance and other employee-related costs; restructuring and other post-combination costs. Excludes acquisition-related cost incurred to effect business combination; cost to issue debt or equity securities; and cost related to acquisition of asset.

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