Note 5 - Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022
Operating lease right-of-use assets		$ 883	$ 842
Operating lease liabilities - current		112	111
Operating lease liabilities - noncurrent		$ 846	$ 795
Weighted-average remaining lease term (in years) (Year)		13 years 7 months 6 days	14 years 3 months 18 days
Weighted-average discount rate		4.40%	4.20%
Other Assets [Member]
Operating lease right-of-use assets	[1]	$ 883	$ 842
Other Current Liabilities [Member]
Operating lease liabilities - current		112	111
Other Liabilities [Member]
Operating lease liabilities - noncurrent		$ 846	$ 795

[1] Finance leases were not material as of December 31, 2023 and 2022.