Segment Information - Reconciliation of Segments Operating Income to Consolidated Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Operating income	$ 7,220	$ 7,552	$ 14,804	$ 15,348
Severance charges	(237)	0	(237)	0
Other components of net periodic benefit charges	(62)	(83)	(124)	(255)
Equity in earnings (losses) of unconsolidated businesses	(33)	41	(24)	38
Other income (expense), net	210	49	324	(875)
Interest expense	(1,285)	(785)	(2,492)	(1,571)
Income Before Provision For Income Taxes	6,112	6,857	12,612	12,940
Operating Segments
Segment Reporting Information [Line Items]
Operating income	7,863	7,825	15,513	15,817
Corporate and other
Segment Reporting Information [Line Items]
Operating income	$ (344)	$ (190)	$ (348)	$ (214)