(Loss) Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net (loss) income attributable to Corning Incorporated	$ (71)	$ 92	$ (167)	$ 591
Less: Series A convertible preferred stock dividend	25	24	49	49
Net (loss) income available to common stockholders – basic	(96)	68	(216)	542
Plus: Series A convertible preferred stock dividend				49
Net (loss) income available to common stockholders – diluted	$ (96)	$ 68	$ (216)	$ 591
Weighted-average common shares outstanding - basic (in shares)	759	781	760	782
Effect of dilutive securities:
Weighted-average common shares outstanding - diluted (in shares)	759	789	760	906
Basic (loss) earnings per common share (in dollars per share)	$ (0.13)	$ 0.09	$ (0.28)	$ 0.69
Diluted (loss) earnings per common share (in dollars per share)	$ (0.13)	$ 0.09	$ (0.28)	$ 0.65
Antidilutive potential shares excluded from diluted earnings per common share:
Total	153	117	153	2
Stock Compensation Plan [Member]
Effect of dilutive securities:
Effect of dilutive securities (in shares)		8		9
Antidilutive potential shares excluded from diluted earnings per common share:
Total	38	2	38	2
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	115	115