Note 13 - Income Taxes - Schedule of Income Tax Provision and Effective Tax Rate (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Earnings from operations before income taxes	$ 7	$ 54
Effective tax rate	14.30%	305.60%
Provision for income taxes	$ 1	$ 165
Provision for income taxes at U.S. statutory tax rate	$ 1	11
Difference between tax at effective vs. statutory rate		$ 154