Note 5 - Earnings Per Common Share - Reconciliation of Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net income attributable to Corning Incorporated	$ 104	$ 281	$ 313	$ 457
Weighted-average common shares outstanding – basic (in shares)	853	848	853	846
Effect of dilutive securities:
Stock options and other awards (in shares)	11	11	12	13
Weighted-average common shares outstanding – diluted (in shares)	864	859	865	859
Basic (Note 5) (in dollars per share)	$ 0.12	$ 0.33	$ 0.37	$ 0.54
Diluted (Note 5) (in dollars per share)	$ 0.12	$ 0.33	$ 0.36	$ 0.53
Stock Options And Other Awards [Member]
Effect of dilutive securities:
Stock options and other awards (in shares)	3	3	4	3