Segment Information - Reconciliation of Segments Operating Income to Consolidated Income (Detail) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Segment Reporting Information [Line Items]
Operating Income	$ 8,242	$ 7,978
Other components of net periodic benefit charges	(13)	(8)
Acquisition and integration related charges	(261)	0
Equity in earnings of unconsolidated businesses	5	6
Other income, net	477	121
Interest expense	(1,940)	(1,632)
Income Before Provision For Income Taxes	6,784	6,473
Operating Segments
Segment Reporting Information [Line Items]
Operating Income	8,598	8,088
Corporate and other
Segment Reporting Information [Line Items]
Operating Income	$ (82)	$ (102)

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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