Note 12 - Hedging Activities - Summary of Effect of Undesignated Derivative Financial Instruments on Consolidated Financial Statements (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Gain (loss) recognized in income	$ (22)	$ (148)	$ 288	$ (57)
Foreign Exchange Contract [Member] | Other (Expense) Income, Net [Member]
Gain (loss) recognized in income	(9)	(48)	26	(62)
Translated Earnings Contracts [Member] | Translated Earnings Contract (Loss) Gain, Net [Member]
Gain (loss) recognized in income	$ (13)	$ (100)	$ 262	$ 5