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Note 20 - Reportable Segments (Details) - Reconciliation of Reportable Segment Net Assets to Consolidated Net Assets - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | ---
Unallocated amounts: |  |  |  |
Current assets (1) | [1] | $ 5,488 | $ 7,402 | $ 6,349
Investments (2) | [2] | 1,638 | 1,490 | 1,595
Property, plant and equipment, net (3) | [3] | 1,692 | 1,657 | 1,594
Other non-current assets (4) | [4] | 5,655 | 5,258 | 4,249
Total assets |  | 28,547 | 30,063 | 28,478
Reportable Segments [Member] |  |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |  |
Total assets of reportable segments |  | 13,336 | 13,738 | 14,269
Non Reportable Segments [Member] |  |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |  |
Non-reportable segments |  | $ 738 | $ 518 | $ 422
[1] | Includes current corporate assets, primarily cash, short-term investments, current portion of long-term derivative assets and deferred taxes.
[2] | Represents corporate investments in affiliated companies, at both cost and equity (primarily Dow Corning).
[3] | Represents corporate property not specifically identifiable to an operating segment.
[4] | Includes non-current corporate assets, pension assets, long-term derivative assets and deferred taxes.

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 + Details
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