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Note 6 - Available-for-Sale Investments (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	[1]	$ 35
Proceeds from Sale of Short-term Investments		$ 1,046	$ 954
[1] Includes $35 million of asset-based securities that mature over time and are being reported at their final maturity dates.

X

- Definition

Fair value of available-for-sale debt securities maturing after the tenth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 320



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (d)



-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 942



-SubTopic 320



-Section 50



-Paragraph 3



-Subparagraph (d)



-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 320



-SubTopic 10



-Section 50



-Paragraph 3



-Subparagraph (d)



-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27198-111563

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X

- References

No definition available.

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X

- Definition

The cash inflow from sales of all investments, including securities and other assets, having ready marketability and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Glossary Investing Activities



-URI http://asc.fasb.org/extlink&oid=6516133



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 230



-SubTopic 10



-Section 45



-Paragraph 12



-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585

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