Earnings Per Share of Common Stock - Computation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Number of shares on which basic earnings per share is calculated:
Weighted-average shares outstanding during period (in shares)	944,400,458	933,861,791	941,375,371	930,891,930
Add - Incremental shares under stock-based compensation plans (in shares)	6,984,869	12,486,696	9,576,464	14,132,523
Add - Incremental shares associated with contingently issuable shares (in shares)	2,138,160	2,582,540	2,020,857	2,395,938
Number of shares on which diluted earnings per share is calculated (in shares)	953,523,487	948,931,026	952,972,693	947,420,391
Net income on which basic earnings per share is calculated
Income from continuing operations	$ 2,199	$ 1,744	$ 5,581	$ 4,992
Income/(loss) from discontinued operations, net of tax	(10)	0	(10)	1
Net income on which basic earnings per share is calculated	2,190	1,744	5,571	4,993
Net income on which dilutive earnings per share is calculated	$ 2,190	$ 1,744	$ 5,571	$ 4,993
Assuming dilution:
Continuing operations (in dollars per share)	$ 2.31	$ 1.84	$ 5.86	$ 5.27
Discontinued operations (in dollars per share)	(0.01)	0.00	(0.01)	0.00
Total (in dollars per share)	2.30	1.84	5.85	5.27
Basic:
Continuing operations (in dollars per share)	2.33	1.87	5.93	5.36
Discontinued operations (in dollars per share)	(0.01)	0.00	(0.01)	0.00
Total (in dollars per share)	$ 2.32	$ 1.87	$ 5.92	$ 5.36