Note 10 - Income Taxes - Federal and State Income Tax Expense (Benefit) Summary (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Federal	$ 74	$ 39	$ 8
State and local	26	20	13
Current income tax expense	100	59	21
Federal	(12)	64	54
State and local	(10)	11	1
Deferred income tax expense	(22)	75	55
Income tax expense as recorded	$ 78	$ 134	$ 76