Segment Information - Reconciliation of Segments Operating Income to Consolidated Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Operating Income	$ 8,172	$ 7,818	$ 16,150	$ 15,339
Other components of net periodic benefit charges	(8)	(9)	(16)	(17)
Legacy legal matter	0	0	0	(106)
Equity in earnings (losses) of unconsolidated businesses	(3)	(14)	3	(23)
Other income (expense), net	79	(72)	200	126
Interest expense	(1,639)	(1,698)	(3,271)	(3,333)
Income Before Provision For Income Taxes	6,609	6,034	13,082	12,109
Operating Segments
Segment Reporting Information [Line Items]
Operating Income	8,281	8,104	16,369	15,875
Corporate and other
Segment Reporting Information [Line Items]
Operating Income	$ (101)	$ (277)	$ (203)	$ (413)