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Earnings per Common Share (Computation of Basic and Diluted Earnings per Common Share) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Net income attributable to Corning Incorporated $ 625 $ 390 $ 774 $ 915
Less: Series A convertible preferred stock dividend 24 24 73 73
Net income available to common stockholders – basic 601 366 701 842
Plus: Series A convertible preferred stock dividend 24 24 73 73
Net income available to common stockholders – diluted $ 625 $ 390 $ 774 $ 915
Weighted-average common shares outstanding - basic (in shares) 805 883 824 905
Effect of dilutive securities:        
Stock options and other dilutive securities (in shares) 10 11 9 11
Weighted-average common shares outstanding - diluted (in shares) 930 1,009 948 1,031
Basic earnings per common share (in dollars per share) $ 0.75 $ 0.41 $ 0.85 $ 0.93
Diluted earnings per common share (in dollars per share) $ 0.67 $ 0.39 $ 0.82 $ 0.89
Anti-dilutive potential shares excluded from diluted earnings per common share:        
Antidilutive potential shares excluded from diluted earnings per common share (in shares) 1 1 2 2
Employee Stock Options and Awards [Member]        
Anti-dilutive potential shares excluded from diluted earnings per common share:        
Antidilutive potential shares excluded from diluted earnings per common share (in shares) 1 1 2 2
Series A Convertible Preferred Stock [Member]        
Effect of dilutive securities:        
Stock options and other dilutive securities (in shares) 115 115 115 115