Note 12 - Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income tax expense (benefit)	$ 5	$ 38	$ (6)	$ 59
Effective income tax rate	56.00%	28.00%	18.00%	27.00%