(Loss) Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net (loss) income attributable to Corning Incorporated	$ (96)	$ 499
Less: Series A convertible preferred stock dividend	24	24
Net (loss) income available to common stockholders – basic	(120)	475
Plus: Series A convertible preferred stock dividend		24
Net (loss) income available to common stockholders – diluted	$ (120)	$ 499
Weighted-average common shares outstanding - basic (in shares)	760	784
Effect of dilutive securities:
Weighted-average common shares outstanding - diluted (in shares)	760	908
Basic (loss) earnings per common share (in dollars per share)	$ (0.16)	$ 0.61
Diluted (loss) earnings per common share (in dollars per share)	$ (0.16)	$ 0.55
Antidilutive potential shares excluded from diluted earnings per common share:
Total	126
Stock Compensation Plan [Member]
Effect of dilutive securities:
Effect of dilutive securities (in shares)		9
Antidilutive potential shares excluded from diluted earnings per common share:
Total	11
Series A Convertible Preferred Stock [Member]
Effect of dilutive securities:
Effect of dilutive securities (in shares)		115
Antidilutive potential shares excluded from diluted earnings per common share:
Total	115