Note 6 - Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Operating lease right-of-use assets	$ 842	$ 741
Weighted-average remaining lease term (in years) (Year)	14 years 3 months 18 days	12 years 10 months 24 days
Weighted-average discount rate	4.20%	4.00%
Other Assets [Member]
Operating lease right-of-use assets	$ 842	$ 741
Other Current Liabilities [Member]
Operating lease liabilities - current	111	94
Other Liabilities [Member]
Operating lease liabilities - noncurrent	$ 795	$ 691