Note 13 - Hedging Activities (Details) - Effect on Consolidated Financial Statements - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Note 13 - Hedging Activities (Details) - Effect on Consolidated Financial Statements [Line Items]
Gain (loss) recognized in income	$ (857)	$ 29
Undesignated [Member]
Note 13 - Hedging Activities (Details) - Effect on Consolidated Financial Statements [Line Items]
Gain (loss) recognized in income	(894)	42
Foreign Currency Transaction and Hedge Gain (Loss), Net [Member] | Foreign Exchange Contracts, Balance Sheet [Member]
Note 13 - Hedging Activities (Details) - Effect on Consolidated Financial Statements [Line Items]
Gain (loss) recognized in income	(15)	11
Foreign Currency Transaction and Hedge Gain (Loss), Net [Member] | Foreign Exchange Contracts, Loans [Member]
Note 13 - Hedging Activities (Details) - Effect on Consolidated Financial Statements [Line Items]
Gain (loss) recognized in income	(22)	2
Foreign Currency Transaction and Hedge Gain (Loss), Net [Member] | Translated Earnings Contracts [Member]
Note 13 - Hedging Activities (Details) - Effect on Consolidated Financial Statements [Line Items]
Gain (loss) recognized in income	$ (857)	$ 29