Note 7 - Available-for-Sale Investments (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended			12 Months Ended
	Jun. 30, 2014		Jun. 30, 2013	Dec. 31, 2013
Available For Sale Investments [Abstract]
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	$ 39	[1]
Marketable Securities, Realized Loss, Other than Temporary Impairments, Amount	4			6
Proceeds from Sale of Short-term Investments	$ 574		$ 1,020

[1] Includes $39 million of asset-based securities that mature over time and are being reported at their final maturity dates.