Note 13 - Employee Benefit Plans - Unrecognized Compensation Expense under Equity-based Compensation Plans (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)
Unrecognized equity-based compensation expense	$ 12
Restricted Stock [Member]
Unrecognized equity-based compensation expense, weighted average vesting period (Year)	4 months 24 days
Unrecognized equity-based compensation expense	$ 1
Restricted Stock Units (RSUs) [Member]
Unrecognized equity-based compensation expense, weighted average vesting period (Year)	9 months 18 days
Unrecognized equity-based compensation expense	$ 7
Performance Shares [Member]
Unrecognized equity-based compensation expense, weighted average vesting period (Year)	10 months 24 days
Unrecognized equity-based compensation expense	$ 4