Note 10 - Summary of Undiscounted Cash Flows for Next Five Years and Thereafter to Finance Lease Liabilities and Operating Lease Liabilities Recorded on Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating Leases, 2021	$ 18
Operating Leases, 2022	20
Operating Leases, 2023	11
Operating Leases, 2024	7
Operating Leases, 2025	6
Operating Leases, Thereafter	24
Operating Leases, Total minimum lease payments	86
Operating Leases, Less: amount of lease payments representing interest	(28)
Operating Leases, Present value of future minimum lease payments	58
Operating Leases, Less: current obligations under leases	13	$ 12
Operating Leases, Long-term lease obligations	45	49
Finance Leases, 2021	1
Finance Leases, Total minimum lease payments	1
Finance Leases, Present value of future minimum lease payments	1
Finance Leases, Less: current obligations under leases		1
Finance Leases, Long-term lease obligations	$ 1	$ 3