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.