Note 8 - Revenue 1 (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Contract with Customer, Liability	$ 100		$ 100		$ 100
Contract with Customer, Liability, Revenue Recognized	5	$ 8	25	$ 28
Contract with Customer, Cash Payments Received for Liabilities That Have Been Deferred	20	$ 22	25	$ 27
Revenue, Remaining Performance Obligation, Amount	92		92
Other Current Assets [Member]
Contract with Customer, Asset, after Allowance for Credit Loss, Current	1		1		1
Other Current Liabilities [Member]
Contract with Customer, Liability	40		40		37
Other Noncurrent Liabilities [Member]
Contract with Customer, Liability	$ 60		$ 60		$ 63