Note 15 - Hedging Activities (Details) - Summary of Notional Amounts and Respective Fair Values of Derivative Financial Instruments - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Derivatives designated as hedging instruments
Notional amount	$ 14,399	$ 15,198
Asset derivatives, fair value	995	1,535
Liability derivatives, fair value	(143)	(59)
Designated as Hedging Instrument [Member]
Derivatives designated as hedging instruments
Asset derivatives, fair value	1
Liability derivatives, fair value	(23)
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivatives designated as hedging instruments
Notional amount	782	487
Asset derivatives, fair value	5	22
Liability derivatives, fair value	(10)	(6)
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivatives designated as hedging instruments
Notional amount	550	1,300
Asset derivatives, fair value		1
Liability derivatives, fair value	(4)	(15)
Not Designated as Hedging Instrument [Member]
Derivatives designated as hedging instruments
Asset derivatives, fair value	472	846
Liability derivatives, fair value	(61)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivatives designated as hedging instruments
Notional amount	1,095	1,285
Asset derivatives, fair value	6	17
Liability derivatives, fair value	(12)	(5)
Not Designated as Hedging Instrument [Member] | Translated Earnings Contracts [Member]
Derivatives designated as hedging instruments
Notional amount	11,972	12,126
Asset derivatives, fair value	511	649
Liability derivatives, fair value	$ (33)	$ (33)