Note 7 - Available-for-Sale Investments (Details) - Summary of Maturities of Available-for-Sale Securities (USD $) In Millions, unless otherwise specified	Sep. 30, 2013
Summary of Maturities of Available-for-Sale Securities [Abstract]
Less than one year	$ 634
Due in 1-5 years	252
Due after 10 years (1)	39	[1]
Total	$ 925

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