Note 9 - Leases - Lease Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating lease expense	$ 16	$ 18	$ 17
Short-term lease expense	5	5	3
Total lease expense	$ 21	$ 23	$ 20