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Note 13 - Employee Retirement Plans (Details) - International Defined Benefit Plan Assets - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | ---
Equity securities: |  |  |
Fair value of plan assets | $ 3,058 | $ 3,263 | $ 2,896
Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 442 | 449 | 300
Insurance Contracts [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 3 | 5 | 6
Insurance Contracts [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 3 | 5 |
Collateralized Mortgage Backed Securities [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 2 | 7 | $ 0
Collateralized Mortgage Backed Securities [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 2 | 7 |
Cash Equivalents [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 60 | 48 |
U.S. Companies [Member] | Equity Securities [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 7 | 6 |
International Companies [Member] | Equity Securities [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 23 | 22 |
International Companies [Member] | Fixed Income Securities [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 347 | 361 |
Fair Value, Inputs, Level 1 [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 346 | 341 |
Fair Value, Inputs, Level 1 [Member] | Cash Equivalents [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 60 | 48 |
Fair Value, Inputs, Level 1 [Member] | International Companies [Member] | Fixed Income Securities [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 286 | 293 |
Fair Value, Inputs, Level 2 [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 91 | 96 |
Fair Value, Inputs, Level 2 [Member] | U.S. Companies [Member] | Equity Securities [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 7 | 6 |
Fair Value, Inputs, Level 2 [Member] | International Companies [Member] | Equity Securities [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 23 | 22 |
Fair Value, Inputs, Level 2 [Member] | International Companies [Member] | Fixed Income Securities [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 61 | 68 |
Fair Value, Inputs, Level 3 [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 5 | 12 |
Fair Value, Inputs, Level 3 [Member] | Insurance Contracts [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | 3 | 5 |
Fair Value, Inputs, Level 3 [Member] | Collateralized Mortgage Backed Securities [Member] | Foreign Pension Plan [Member] |  |  |
Equity securities: |  |  |
Fair value of plan assets | $ 2 | $ 7 |

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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