Note 10 - Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statutory federal rate applied to income before income tax expense	$ 103	$ (17)	$ 129
Current year permanent items	6	11	5
State and local taxes, net of federal tax benefit	21	(4)	26
Change in valuation allowance	(1)	(1)	0
Reserve for uncertain tax positions	(14)	1	0
Other items, net	2	4	(1)
Income tax (benefit) expense as recorded	$ 117	$ (6)	$ 159
Effective income tax rate	24.00%	7.00%	26.00%