Segment Information - Reconciliation of Segments Operating Income to Consolidated Income (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Operating Income	$ 7,978	$ 7,521
Other components of net periodic benefit charges	(8)	(8)
Legacy legal matter	0	(106)
Equity in earnings (losses) of unconsolidated businesses	6	(9)
Other income, net	121	198
Interest expense	(1,632)	(1,635)
Income Before Provision For Income Taxes	6,473	6,075
Operating Segments
Segment Reporting Information [Line Items]
Operating Income	8,088	7,771
Corporate and other
Segment Reporting Information [Line Items]
Operating Income	$ (102)	$ (136)