Note 7 - Earnings Per Share - Schedule of Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net income	$ 1,641	$ 1,630
Weighted-average number of shares outstanding:
Basic (in shares)	609.2	610.6
Diluted (in shares)	610.2	611.5
Earnings per share - basic (in dollars per share)	$ 2.69	$ 2.67
Earnings per share - diluted (in dollars per share)	$ 2.69	$ 2.67
Stock options excluded as their inclusion would be anti-dilutive (in shares)	0.5	0.8
Share-Based Payment Arrangement, Option [Member]
Weighted-average number of shares outstanding:
Dilutive effect of share based payment awards (in shares)	0.5	0.4
Retention Awards [Member]
Weighted-average number of shares outstanding:
Dilutive effect of share based payment awards (in shares)	0.5	0.5