Note 20 - Reportable Segments - Reconciliation of Reportable Segment Net Assets to Consolidated Net Assets (Details) - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Unallocated amounts:
Current assets (1)	[1]	$ 6,070	$ 5,488	$ 7,402
Investments (2)	[2]	12	1,638	1,490
Property, plant and equipment, net (3)	[3]	1,681	1,692	1,657
Other non-current assets (4)	[4]	5,969	5,635	5,258
Total assets		27,899	28,527	30,063
Reportable Segments [Member]
Total assets of reportable segments		13,417	13,336	13,738
Non Reportable Segments [Member]
Non-reportable segments		$ 750	$ 738	$ 518

[1] Includes current corporate assets, primarily cash, short-term investments, current portion of long-term derivative assets and deferred taxes.

[2] Primarily represents the equity earnings of 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.