Note 10 - Income Taxes - Reconciliation of Income Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Federal tax expense (benefit) at statutory rates	$ 23	$ (3)	$ (60)
State taxes	4	(1)	0
Nondeductible expenses and other	4	1	5
Foreign operations taxed at different rates	3	0	0
Goodwill impairment charge	0	0	43
Change in valuation allowance related to foreign losses	1	3	3
Income tax expense (benefit)	$ 35	$ 0	$ (9)
Effective tax rate	32.00%	0.00%	3.00%