Note 13 - Hedging Activities - Effect on Consolidated Financial Statements (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Foreign Exchange Contracts, Balance Sheet [Member] | Foreign Currency Transaction and Hedge Gain (Loss), Net [Member]
Gain (loss) recognized in income	$ 1,000,000	$ (6,000,000)	$ (27,000,000)	$ 7,000,000
Foreign Exchange Contracts, Loans [Member] | Foreign Currency Transaction and Hedge Gain (Loss), Net [Member]
Gain (loss) recognized in income	(4,000,000)	1,000,000	(48,000,000)	3,000,000
Translated Earnings Contracts [Member] | Foreign Currency Transaction and Hedge Gain (Loss), Net [Member]
Gain (loss) recognized in income	(237,000,000)	(149,000,000)	(2,295,000,000)	42,000,000
Undesignated [Member]
Gain (loss) recognized in income	$ (240,000,000)	$ (154,000,000)	(2,370,000,000)	52,000,000
Gain (loss) recognized in income			$ (2,295,000,000)	$ 42,000,000