Note 6 - Available-for-Sale Investments (Details) - Summary of Maturities of Available-for-Sale Securities $ in Millions		Jun. 30, 2015 USD ($)
Summary of Maturities of Available-for-Sale Securities [Abstract]
Less than one year		$ 505
Due in 5-10 years
Due after 10 years (1)	[1]	35
Total		$ 540

[1] Includes $35 million of asset-based securities that mature over time and are being reported at their final maturity dates.