Note 15 - Fair Value Measurements and Derivatives - Location and Amount of Gain or (Loss) Recognized in Income on Undesignated Derivatives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cost of Sales [Member]
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	$ 0	$ 0	$ (5)
Other Income (Expense) [Member]
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	$ (6)	$ (14)	$ (5)