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Note 9 - Investments - Results of Operations (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Dow Corning Corporation [Member] |  |  |  |  |
Net sales |  | $ 898 | $ 1,424 | $ 2,215 | $ 2,788
Gross profit | [1] | 238 | 364 | 588 | 722
Net income attributable to Dow Corning | [2] | 52 | 113 | 163 | 298
Income (Loss) from Equity Method Investments |  | 26 | 57 | 82 | 149
Income (Loss) from Equity Method Investments |  | $ 41 | $ 62 | $ 100 | $ 156
[1] | Gross profit for the three and six months ended June 30, 2016 includes research and development costs of $43 million and $100 million (2015: $63 million and $125 million).
[2] | In the first half of 2015 Dow Corning's net income included a pre-tax gain of $178 million on the settlement of long-term sales agreements.

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