Earnings Per Share of Common Stock - Computation (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Number of shares on which basic earnings per share is calculated:
Weighted-average shares outstanding during period (in shares)		933,861,791	923,577,526	930,891,930	920,347,948
Add - Incremental shares under stock-based compensation plans (in shares)		12,486,696	0	14,132,523	12,829,572
Add - Incremental shares associated with contingently issuable shares (in shares)		2,582,540	0	2,395,938	2,247,712
Number of shares on which diluted earnings per share is calculated (in shares)		948,931,026	923,577,526	947,420,391	935,425,233
Net income on which basic earnings per share is calculated
Income/(loss) from continuing operations		$ 1,744	$ (317)	$ 4,992	$ 3,088
Income/(loss) from discontinued operations, net of tax		0	(13)	1	21
Net income/(loss) on which basic earnings per share is calculated		1,744	(330)	4,993	3,109
Net income/(loss) on which dilutive earnings per share is calculated		$ 1,744	$ (330)	$ 4,993	$ 3,109
Assuming dilution:
Continuing operations (in dollars per share)	[1]	$ 1.84	$ (0.34)	$ 5.27	$ 3.30
Discontinued operations (in dollars per share)	[1]	0.00	(0.01)	0.00	0.02
Total (in dollars per share)	[1]	1.84	(0.36)	5.27	3.32
Basic:
Continuing operations (in dollars per share)	[1]	1.87	(0.34)	5.36	3.36
Discontinued operations (in dollars per share)	[1]	0.00	(0.01)	0.00	0.02
Total (in dollars per share)	[1]	$ 1.87	$ (0.36)	$ 5.36	$ 3.38

[1] 2024 includes the impact of a pension settlement charge. Refer to note U, "Retirement-Related Benefits," in the company's 2024 Annual Report for additional information.