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Note 6 - Available-for-Sale Investments (Details) - Summary of Fair Value of Available-for-Sale Investments - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
US Government Agencies Debt Securities [Member]
Bonds, notes and other securities:
Amortized cost	$ 573	$ 759
Fair value	573	759
Total Short-Term Investments [Member]
Bonds, notes and other securities:
Amortized cost	573	759
Fair value	573	759
Asset-backed Securities [Member]
Bonds, notes and other securities:
Amortized cost	39	42
Fair value	35	38
Total Long-Term Investments [Member]
Bonds, notes and other securities:
Amortized cost	39	42
Fair value	$ 35	$ 38

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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-Publisher FASB



-Name Accounting Standards Codification



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-SubTopic 10



-Section 25



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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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