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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 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 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) $ 212 $ 1,014 $ 1,115 $ 1,484
Net income available to common stockholders - basic (in Dollars) 188 990 1,042 1,414
Net income available to common stockholders - diluted (in Dollars) $ 188 $ 1,014 $ 1,115 $ 1,484
Weighted-average common shares outstanding - basic 1,210 1,284 1,241 1,315
Effect of dilutive securities:        
Weighted-average common shares outstanding - diluted 1,218 1,411 1,366 1,436
Basic earnings per common share (in Dollars per share) $ 0.16 $ 0.77 $ 0.84 $ 1.08
Diluted earnings per common share (in Dollars per share) $ 0.15 $ 0.72 $ 0.82 $ 1.03
Antidilutive potential shares excluded from diluted earnings per common share:        
Anti-dilutive potential shares excluded from diluted earnings per common share 144 23 22 28
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      
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 29 23 22 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       4
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 $ 73 $ 70
Plus: Series A convertible preferred stock dividend (1) (in Dollars) $ 24 $ 24 $ 73 $ 70
Effect of dilutive securities:        
Effect of dilutive securities   115 115 109
Stock Options and Other Dilutive Securities [Member]        
Effect of dilutive securities:        
Effect of dilutive securities 8 12 10 12