Note 5 - (Loss) Earnings Per Common Share - Reconciliation of Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net (loss) income attributable to Corning Incorporated	$ (117)	$ 164	$ 196	$ 621
Weighted-average common shares outstanding – basic (in shares)	854	850	853	848
Effect of dilutive securities:
Stock options and other awards (in shares)		9	15	10
Weighted-average common shares outstanding – diluted (in shares)	854	859	868	858
Basic (Note 5) (in dollars per share)	$ (0.14)	$ 0.19	$ 0.23	$ 0.73
Diluted (Note 5) (in dollars per share)	$ (0.14)	$ 0.19	$ 0.23	$ 0.72
Stock Options And Other Awards [Member]
Effect of dilutive securities:
Stock options and other awards (in shares)	18	3		3