Earnings Per Share of Common Stock - Computation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Number of shares on which basic earnings per share is calculated:
Weighted-average shares outstanding during period (in shares)	941,192,024	930,807,276	939,862,828	929,407,000
Add - Incremental shares under stock-based compensation plans (in shares)	10,069,555	14,690,010	10,872,261	14,955,436
Add - Incremental shares associated with contingently issuable shares (in shares)	2,001,955	2,464,631	1,962,206	2,302,637
Number of shares on which diluted earnings per share is calculated (in shares)	953,263,534	947,961,917	952,697,295	946,665,073
Net income on which basic earnings per share is calculated
Income from continuing operations	$ 2,166	$ 2,193	$ 3,382	$ 3,248
Income/(loss) from discontinued operations, net of tax	(1)	1	(1)	1
Net income on which basic earnings per share is calculated	2,165	2,194	3,381	3,249
Net income on which dilutive earnings per share is calculated	$ 2,165	$ 2,194	$ 3,381	$ 3,249
Assuming dilution:
Continuing operations (in dollars per share)	$ 2.27	$ 2.31	$ 3.55	$ 3.43
Discontinued operations (in dollars per share)	0.00	0.00	0.00	0.00
Total (in dollars per share)	2.27	2.31	3.55	3.43
Basic:
Continuing operations (in dollars per share)	2.30	2.36	3.60	3.49
Discontinued operations (in dollars per share)	0.00	0.00	0.00	0.00
Total (in dollars per share)	$ 2.30	$ 2.36	$ 3.60	$ 3.50