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
	Mar. 31, 2021	Mar. 31, 2020
Gain (loss) recognized in income	$ 316	$ 69
Foreign Exchange Contract [Member] | Other (Expense) Income, Net [Member]
Gain (loss) recognized in income	44	1
Translated Earnings Contracts [Member] | Translated Earnings Contract (Loss) Gain, Net [Member]
Gain (loss) recognized in income	$ 272	$ 68