Note 6 - Leases - Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 66	$ 62	$ 60
Operating cash flows from finance leases	3	2	2
Financing cash flows from finance leases	10	8	9
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	29	61	111
Finance leases	$ 58	$ 5	$ 6