Note 7 - Available-for-Sale Investments (Details) - Summary of Maturities of Available-for-Sale Securities (USD $) In Millions, unless otherwise specified	Jun. 30, 2013
Summary of Maturities of Available-for-Sale Securities [Abstract]
Less than one year	$ 626
Due in 1-5 years	244
Due after 10 years (1)	41	[1]
Total	$ 911

[1] Includes $41 million of asset-backed securities that mature over time and are being reported at their final maturity dates.