Note 1 - Description of Business and Summary of Significant Accounting Policies - Allowance for Credit Losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Beginning balance	$ 17	$ 16
Provision for credit losses	2	21	$ 1
Amounts written off	0	(20)
Amounts recovered from previous write-offs	(4)	0
Ending balance	$ 15	$ 17	$ 16