Note 10 - Income Taxes - Federal and State Income Tax Expense (Benefit) Summary (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Federal	$ 27	$ 106	$ 73
State and local	1	20	12
Current income tax expense	28	126	85
Federal	(40)	(6)	(76)
State and local	(16)	(3)	(15)
Deferred income tax benefit	(56)	(9)	(91)
Total income tax (benefit) expense	$ (28)	$ 117	$ (6)