Note 19 - Reportable Segments (Details) - Reconciliation of Reportable Segment Net Income (Loss) to Consolidated Net Income (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Segment Reporting, Revenue Reconciling Item [Line Items]
Net Income	$ 1,014		$ 408		$ 1,484		$ 1,540
Unallocated amounts:
Net financing costs (1)	(27)	[1]	(3)	[1]	(86)	[1]	(65)	[1]
Stock-based compensation expense	(19)		(15)		(47)		(40)
Exploratory research	(24)		(29)		(75)		(80)
Corporate contributions	(19)		(7)		(35)		(32)
Equity in earnings of affiliated companies, net of impairments (2)	94	[2]	59	[2]	245	[2]	142	[2]
Asbestos settlement	(5)		(5)		(11)		(13)
Purchased collars and average rate forward contracts, net of tax	478		(46)		405		206
Other corporate items (3)	3	[3]	(11)	[3]	(120)	[3]	22	[3]
Reportable Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net Income	574		497		1,348		1,491
Non Reportable Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net Income	$ (41)		$ (32)		$ (140)		$ (91)

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

[2] Primarily represents the equity earnings of Dow Corning, which, for the three months ended September 30, 2014, includes our portion of a mark-to-market loss on a derivative instrument of $(8) million (after-tax), an energy tax credit of $8 million (after-tax), and a foreign tax credit of $38 million (after-tax). For the nine months ended September 30, 2014, the equity earnings of Dow Corning included our portion of a mark-to-market gain on a derivative instrument of $29 million (after-tax). For the three and nine months ended September 30, 2013, the equity earnings of Dow Corning includes our portion of gains in the amounts of approximately $30 million for the resolution of contract disputes against customers relating to enforcement of long-term supply agreements and $16 million for the positive impact of the settlement of a derivative, along with a charge of $4 million related to the impact of a tax valuation allowance. Also included in the nine months ended September 30, 2013, an $11 million restructuring charge for our share of costs for headcount reductions and asset write-offs.

[3] For the nine months ended September 30, 2013, Corning recorded a $54 million tax benefit for the impact of the American Taxpayer Relief Act enacted on January 3, 2013 and made retroactive to 2012.