Note 17 - Reportable Segments - Reconciliation of Reportable Segment Net Income (Loss) to Consolidated Net Income (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Reportable Segments [Member]
Net income		$ 373	$ 488	$ 671	$ 941
Unallocated amounts:
Net income		373	488	671	941
Non Reportable Segments [Member]
Net income		(55)	(45)	(140)	(93)
Unallocated amounts:
Net income		(55)	(45)	(140)	(93)
Net income		2,207	496	1,839	903
Net financing costs	[1]	(29)	(25)	(58)	(49)
Stock-based compensation expense		(14)	(15)	(23)	(25)
Exploratory research		(28)	(28)	(55)	(54)
Corporate contributions		(16)	(12)	(23)	(24)
Gain		2,676		2,676
Equity in earnings of affiliated companies, net of impairments	[2]	48	59	104	153
Unrealized loss on foreign currency hedges related to translated earnings		(1,253)	(10)	(2,203)	(130)
Resolution of Department of Justice investigation		(98)		(98)
Income tax benefit		98		98
Other corporate items		(50)	(11)	(66)	(13)
Net income		$ 2,207	$ 496	$ 1,839	$ 903

[1] Net financing costs include interest income, interest expense, and interest costs and investment gains and losses associated with benefit plans.

[2] Primarily represents the equity earnings of Dow Corning.