Earnings Per Share of Common Stock - Computation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Number of shares on which basic earnings per share is calculated:
Weighted-average shares outstanding during period (in shares)	907,526,887	899,316,026
Add - Incremental shares under stock-based compensation plans (in shares)	8,609,239	8,375,246
Add - Incremental shares associated with contingently issuable shares (in shares)	1,709,153	1,534,864
Number of shares on which diluted earnings per share is calculated (in shares)	917,845,279	909,226,136
Net income on which basic earnings per share is calculated
Income from continuing operations	$ 934	$ 662
Income/(loss) from discontinued operations, net of tax	(7)	71
Net income on which basic earnings per share is calculated	927	733
Net income on which diluted earnings per share is calculated
Income from continuing operations	934	662
Income from continuing operations on which diluted earnings per share is calculated	934	662
Income/(loss) from discontinued operations, net of tax, on which basic and diluted earnings per share is calculated	(7)	71
Net income on which diluted earnings per share is calculated	$ 927	$ 733
Assuming dilution
Continuing operations (in dollars per share)	$ 1.02	$ 0.73
Discontinued operations (in dollars per share)	(0.01)	0.08
Total (in dollars per share)	1.01	0.81
Basic
Continuing operations (in dollars per share)	1.03	0.74
Discontinued operations (in dollars per share)	(0.01)	0.08
Total (in dollars per share)	$ 1.02	$ 0.82