Note 1 - Description of Business and Summary of Significant Accounting Policies - Allowance for Credit Losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Beginning balance	$ 15	$ 17
Provision for credit losses	8	2	$ 21
Amounts written off	(7)	0
Amounts recovered from previous write-offs	0	(4)
Ending balance	$ 16	$ 15	$ 17