Note 15 - Hedging Activities (Details) - Effect on Consolidated financial statements (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 15 - Hedging Activities (Details) - Effect on Consolidated financial statements [Line Items]
Gain (loss) recognized in income	$ 1,369	$ 435
Other Income [Member] | Foreign Exchange Contracts, Balance Sheet [Member]
Note 15 - Hedging Activities (Details) - Effect on Consolidated financial statements [Line Items]
Gain (loss) recognized in income	29	100	82
Other Income [Member] | Foreign Exchange Contracts, Loans [Member]
Note 15 - Hedging Activities (Details) - Effect on Consolidated financial statements [Line Items]
Gain (loss) recognized in income	13	87	141
Other Income [Member] | Translated Earnings Contracts [Member]
Note 15 - Hedging Activities (Details) - Effect on Consolidated financial statements [Line Items]
Gain (loss) recognized in income	1,369	435
Undesignated [Member]
Note 15 - Hedging Activities (Details) - Effect on Consolidated financial statements [Line Items]
Gain (loss) recognized in income	$ 1,411	$ 622	$ 223