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Segment Information - Reconciliation of Segments Operating Income to Consolidated Income (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Operating income	$ 7,473	$ 7,894	$ 22,277	$ 23,242
Severance charges	0	0	(237)	0
Other components of net periodic benefit charges	(62)	(68)	(186)	(323)
Equity in earnings (losses) of unconsolidated businesses	(18)	2	(42)	40
Other income (expense), net	170	(439)	494	(1,314)
Interest expense	(1,433)	(937)	(3,925)	(2,508)
Income Before Provision For Income Taxes	6,192	6,520	18,804	19,460
Operating Segments
Segment Reporting Information [Line Items]
Operating income	8,086	8,047	23,599	23,864
Corporate and other
Segment Reporting Information [Line Items]
Operating income	$ (551)	$ (85)	$ (899)	$ (299)

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