Note 3 - Available-for-Sale Investments (Details) - Summary of Maturities of Available-for-Sale Securities (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Summary of Maturities of Available-for-Sale Securities [Abstract]
Less than one year	$ 440
Due in 1-5 years	319
Due after 10 years (1)	38	[1]
Total	$ 797

[1] Included in the maturity table is $38 million of asset-based securities that mature over time.