Note 8 - Investments (Details) - Dow Corning Corporation [Member] - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Note 8 - Investments (Details) [Line Items]
Research and Development Expense	$ 63		$ 70	$ 125	$ 137
Litigation Settlement, Amount	29			29
Equity Method Investment, Summarized Financial Information, Derivative, Loss on Derivative	$ 21			$ 48
Gain (Loss) on Contract Termination		$ 178			32
Equity Method Investment, Summarized Financial Information, Derivative, Gain on Derivative			$ 25		$ 114