Note 13 - Hedging Activities - Effect on Consolidated Financial Statements (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Foreign Exchange Contracts, Balance Sheet [Member] | Foreign Currency Transaction and Hedge Gain (Loss), Net [Member]
Gain (loss) recognized in income	$ (13)	$ 2	$ (28)	$ 13
Foreign Exchange Contracts, Loans [Member] | Foreign Currency Transaction and Hedge Gain (Loss), Net [Member]
Gain (loss) recognized in income	(22)		(44)	2
Translated Earnings Contracts [Member] | Foreign Currency Transaction and Hedge Gain (Loss), Net [Member]
Gain (loss) recognized in income	(1,201)	162	(2,058)	191
Undesignated [Member]
Gain (loss) recognized in income	$ (1,236)	$ 164	(2,130)	206
Gain (loss) recognized in income			$ (2,058)	$ 191