Note 5 - Earnings Per Common Share (Details) - Computation of Basic and Diluted Earnings per Common Share - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Note 5 - Earnings Per Common Share (Details) - Computation of Basic and Diluted Earnings per Common Share [Line Items]
Net income attributable to Corning Incorporated (in Dollars)	$ 496	$ 169	$ 903	$ 470
Net income available to common stockholders - basic (in Dollars)	472	145	854	425
Net income available to common stockholders - diluted (in Dollars)	$ 496	$ 145	$ 903	$ 425
Weighted-average common shares outstanding - basic	1,246	1,302	1,257	1,331
Effect of dilutive securities:
Weighted-average common shares outstanding - diluted	1,371	1,315	1,383	1,343
Basic earnings per common share (in Dollars per share)	$ 0.38	$ 0.11	$ 0.68	$ 0.32
Diluted earnings per common share (in Dollars per share)	$ 0.36	$ 0.11	$ 0.65	$ 0.32
Antidilutive potential shares excluded from diluted earnings per common share:
Anti-dilutive potential shares excluded from diluted earnings per common share	20	135	17	136
Convertible Preferred Stock, Series A [Member]
Antidilutive potential shares excluded from diluted earnings per common share:
Anti-dilutive potential shares excluded from diluted earnings per common share		115		106
Stock Compensation Plan [Member]
Antidilutive potential shares excluded from diluted earnings per common share:
Anti-dilutive potential shares excluded from diluted earnings per common share	20	20	17	24
Forward Contracts [Member]
Antidilutive potential shares excluded from diluted earnings per common share:
Anti-dilutive potential shares excluded from diluted earnings per common share				6
Convertible Preferred Stock, Series A [Member]
Note 5 - Earnings Per Common Share (Details) - Computation of Basic and Diluted Earnings per Common Share [Line Items]
Less: Series A convertible preferred stock dividend (in Dollars)	$ 24	$ 24	$ 49	$ 45
Plus: Series A convertible preferred stock dividend (in Dollars)	$ 24	$ 24	$ 49	$ 45
Effect of dilutive securities:
Effect of dilutive securities	115		115
Stock Options and Other Dilutive Securities [Member]
Effect of dilutive securities:
Effect of dilutive securities	10	13	11	12