Note 8 - Earnings Per Share - Schedule of Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net income	$ 1,671	$ 1,528	$ 4,985	$ 4,727
Weighted-average number of shares outstanding:
Basic (in shares)	607.6	608.7	608.7	609.3
Diluted (in shares)	608.6	609.8	609.7	610.3
Earnings per share - basic (in dollars per share)	$ 2.75	$ 2.51	$ 8.19	$ 7.76
Earnings per share - diluted (in dollars per share)	$ 2.75	$ 2.51	$ 8.18	$ 7.75
Stock options excluded as their inclusion would be anti-dilutive (in shares)	0.6	1.0	0.6	0.9
Share-Based Payment Arrangement, Option [Member]
Weighted-average number of shares outstanding:
Dilutive effect of share based payment awards (in shares)	0.4	0.4	0.4	0.4
Retention Awards [Member]
Weighted-average number of shares outstanding:
Dilutive effect of share based payment awards (in shares)	0.6	0.7	0.6	0.6