Note 4 - Earnings Per Common Share - Reconciliation of Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net income attributable to Corning Incorporated	$ 209	$ 176
Weighted-average common shares outstanding – basic (in shares)	852	844
Stock options and other awards (in shares)	10	15
Weighted-average common shares outstanding – diluted (in shares)	862	859
Basic (Note 4) (in dollars per share)	$ 0.25	$ 0.21
Diluted (Note 4) (in dollars per share)	$ 0.24	$ 0.2
Stock Options And Other Awards [Member]
Total (in shares)	3	5