Note 11 - Retirement Plans - Components of Net Periodic Benefit Cost for Pension Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Interest cost	$ 5	$ 4	$ 5
Expected return on plan assets	(5)	(7)	(7)
Pension settlement fees	4	0	0
Net periodic pension benefit	$ (4)	$ (3)	$ (2)