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Segment Information - Reconciliation of Segments Operating Income to Consolidated Income (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Operating income	$ 7,521	$ 7,584
Other components of net periodic benefit charges	(8)	(62)
Legacy legal matter	(106)	0
Equity in earnings (losses) of unconsolidated businesses	(9)	9
Other income, net	198	114
Interest expense	(1,635)	(1,207)
Income Before Provision For Income Taxes	6,075	6,500
Operating Segments
Segment Reporting Information [Line Items]
Operating income	7,771	7,650
Corporate and other
Segment Reporting Information [Line Items]
Operating income	$ (136)	$ (4)

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