Earnings Per Share of Common Stock - Computation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Number of shares on which basic earnings per share is calculated:
Weighted-average shares outstanding during period (in shares)	917,178,779	907,526,887
Add - Incremental shares under stock-based compensation plans (in shares)	14,256,390	8,609,239
Add - Incremental shares associated with contingently issuable shares (in shares)	1,996,144	1,709,153
Number of shares on which diluted earnings per share is calculated (in shares)	933,431,312	917,845,279
Net income on which basic earnings per share is calculated
Income from continuing operations	$ 1,575	$ 934
Income/(loss) from discontinued operations, net of tax	30	(7)
Net income	1,605	927
Net income/(loss) on which diluted earnings per share is calculated
Income from continuing operations	1,575	934
Net income applicable to contingently issuable shares	0	0
Income from continuing operations on which diluted earnings per share is calculated	1,575	934
Income/(loss) from discontinued operations, net of tax, on which diluted earnings per share is calculated	30	(7)
Net income on which diluted earnings per share is calculated	$ 1,605	$ 927
Assuming dilution:
Continuing operations (in dollars per share)	$ 1.69	$ 1.02
Discontinued operations (in dollars per share)	0.03	(0.01)
Total (in dollars per share)	1.72	1.01
Basic:
Continuing operations (in dollars per share)	1.72	1.03
Discontinued operations (in dollars per share)	0.03	(0.01)
Total (in dollars per share)	$ 1.75	$ 1.02