Note 10 - Income Taxes - Federal and State Income Tax Expense (Benefit) Summary (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Federal	$ 148	$ 74	$ 39
State and local	31	26	20
Current income tax expense	179	100	59
Federal	(21)	(12)	64
State and local	1	(10)	11
Deferred income tax (benefit) expense	(20)	(22)	75
Income tax expense as recorded	$ 159	$ 78	$ 134