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Note 3 - Available-for-Sale Investments | 12 Months Ended
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Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract] |
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] | 3. Available-for-Sale Investments The following is a summary of the fair value of available-for-sale securities (in millions):
| Amortized cost December 31, |  | Fair value December 31,
| 2015 |  | 2014 |  | 2015 |  | 2014
Bonds, notes and other securities: |  |  |  |  |  |  |  |  |  |  |
U.S. government and agencies | $ | 100 |  | $ | 759 |  | $ | 100 |  | $ | 759
Total short-term investments | $ | 100 |  | $ | 759 |  | $ | 100 |  | $ | 759
Asset-backed securities | $ | 37 |  | $ | 42 |  | $ | 33 |  | $ | 38
Total long-term investments | $ | 37 |  | $ | 42 |  | $ | 33 |  | $ | 38
We do not intend to sell, nor do we believe it is more likely than not that we would be required to sell, the long-term investment asset-backed securities (which are collateralized by mortgages) before recovery of their amortized cost basis. It is possible that a significant degradation in the delinquency or foreclosure rates in the underlying assets could cause further temporary or other-than-temporary impairments in the future. The following table summarizes the contractual maturities of available-for-sale securities at December 31, 2015 (in millions):
Less than one year | $ 70
Due in 1-5 years | 30
Due in 5-10 years |
Due after 10 years | 33
Total | $133
Unrealized gains and losses, net of tax, are computed on a specific identification basis and are reported as a separate component of accumulated other comprehensive loss in shareholders’ equity until realized. The following tables provide the fair value and gross unrealized losses of the Company’s investments and unrealized losses that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2015 and 2014:
(in millions) | Number of securities in a loss position |  | December 31, 2015
12 months or greater |  | Total
Fair value |  | Unrealized losses (1) | Fair value |  | Unrealized losses
Asset-backed securities | 21 |  | $ | 33 |  | $ | (4) |  | $ | 33 |  | $ | (4)
Total long-term investments | 21 |  | $ | 33 |  | $ | (4) |  | $ | 33 |  | $ | (4)
(1) | Unrealized losses in securities less than 12 months were not significant.
(in millions) | Number of securities in a loss position |  | December 31, 2014
12 months or greater |  | Total
Fair value |  | Unrealized losses (1) | Fair value |  | Unrealized losses
Asset-backed securities | 21 |  | $ | 37 |  | $ | (4) |  | $ | 37 |  | $ | (4)
Total long-term investments | 21 |  | $ | 37 |  | $ | (4) |  | $ | 37 |  | $ | (4)
(1) | Unrealized losses in securities less than 12 months were not significant.
Proceeds from sales and maturities of short-term investments totaled $1.6 billion, $1.2 billion and $2.0 billion in 2015, 2014 and 2013, respectively.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -Glossary Debt Security -URI http://asc.fasb.org/extlink&oid=6509901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -Glossary Equity Security -URI http://asc.fasb.org/extlink&oid=6511694 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27405-111563 + Details
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