Earnings Per Share of Common Stock - Computation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Number of shares on which basic earnings per share is calculated:
Weighted-average shares outstanding during period (in shares)	920,287,541	909,855,943	918,733,160	908,691,415
Add - Incremental shares under stock-based compensation plans (in shares)	11,883,820	7,584,035	13,070,105	8,096,637
Add - Incremental shares associated with contingently issuable shares (in shares)	2,226,234	2,012,519	2,111,189	1,860,836
Number of shares on which diluted earnings per share is calculated (in shares)	934,397,595	919,452,496	933,914,454	918,648,888
Net income on which basic earnings per share is calculated
Income from continuing operations	$ 1,830	$ 1,581	$ 3,405	$ 2,515
Income from discontinued operations, net of tax	4	2	34	(4)
Net income	1,834	1,583	3,439	2,511
Net income/(loss) on which diluted earnings per share is calculated
Income from continuing operations	1,830	1,581	3,405	2,515
Net income applicable to contingently issuable shares	0	0	0	0
Income from continuing operations on which diluted earnings per share is calculated	1,830	1,581	3,405	2,515
Income/(loss) from discontinued operations, net of tax, on which diluted earnings per share is calculated	4	2	34	(4)
Net income on which diluted earnings per share is calculated	$ 1,834	$ 1,583	$ 3,439	$ 2,511
Assuming dilution:
Continuing operations (in dollars per share)	$ 1.96	$ 1.72	$ 3.65	$ 2.74
Discontinued operations (in dollars per share)	0.00	0.00	0.04	0.00
Total (in dollars per share)	1.96	1.72	3.68	2.73
Basic:
Continuing operations (in dollars per share)	1.99	1.74	3.71	2.77
Discontinued operations (in dollars per share)	0.00	0.00	0.04	0.00
Total (in dollars per share)	$ 1.99	$ 1.74	$ 3.74	$ 2.76