Note 10 - Income Taxes - Federal and State Income Tax Expense (Benefit) Summary (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Federal	$ 106	$ 73	$ 148
State and local	20	12	31
Current income tax expense	126	85	179
Federal	(6)	(76)	(21)
State and local	(3)	(15)	1
Deferred income tax benefit	(9)	(91)	(20)
Income tax (benefit) expense as recorded	$ 117	$ (6)	$ 159