Note 9 - Investments (Details) (USD $) In Millions, unless otherwise specified				1 Months Ended		0 Months Ended		3 Months Ended
	Dec. 31, 2013 Samsung Corning Precision Materials Co., Ltd. [Member] Corning Inc. [Member]	Sep. 30, 2013 Samsung Corning Precision Materials Co., Ltd. [Member] Corning Inc. [Member]	Sep. 30, 2013 Samsung Corning Precision Materials Co., Ltd. [Member] Samsung Display Co., Ltd. [Member]	Oct. 31, 2013 Samsung Corning Precision Materials Co., Ltd. [Member] Three Minority Shareholders [Member]	Sep. 30, 2013 Samsung Corning Precision Materials Co., Ltd. [Member] Three Minority Shareholders [Member]	Jan. 15, 2014 Samsung Corning Precision Materials Co., Ltd. [Member]	Mar. 31, 2014 Dow Corning Corporation [Member] Corning Inc. [Member]	Mar. 31, 2014 Dow Corning Corporation [Member]	Mar. 31, 2013 Dow Corning Corporation [Member]
Note 9 - Investments (Details) [Line Items]
Equity Method Investment, Ownership Percentage	57.00%	50.00%	42.50%		7.00%		50.00%
Payments to Noncontrolling Interests				$ 506
Sale of Stock, Percentage of Ownership after Transaction						100.00%
Equity Method Investment, Summarized Financial Information, Revenue								1,524	1,264
Equity Method Investment, Summarized Financial Information, Gross Profit (Loss)								483	324
Equity Method Investment, Summarized Financial Information, Net Income (Loss)								191	62
Equity Method Investment, Summarized Financial Information, Derivative, Gain on Derivative								99
Derivative, Gain on Derivative								$ 32