Note 7 - Stockholders' Equity - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Accumulated other comprehensive loss	$ 523	$ 495	$ 488	$ 435	$ 412	$ 386
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated other comprehensive loss	(231)		(227)
Accumulated Other Adjustments Attributable to Parent [Member]
Accumulated other comprehensive loss	(1)		(1)
AOCI Attributable to Parent [Member]
Accumulated other comprehensive loss	$ (232)	$ (233)	$ (228)	$ (230)	$ (231)	$ (230)