Note 13 - Goodwill and Intangible Assets - Summary of Changes in Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Goodwill, gross	$ 2,741	$ 2,742
Goodwill, acquisitions, dispositions, and adjustments	0	(1)
Goodwill, acquired	0	(1)
Goodwill, dispositions		0
Goodwill, gross	2,741	2,741
Accumulated goodwill impairment	(99)	(99)
Goodwill, net	2,642	2,643
Goodwill, dispositions		0
Goodwill, net	$ 2,642	$ 2,642