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		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net income attributable to Corning Incorporated	$ 164	$ 208	$ 621	$ 1,352
Weighted-average common shares outstanding – basic (in shares)	850	843	848	843
Stock options and other awards (in shares)	9	12	10	14
Weighted-average common shares outstanding – diluted (in shares)	859	855	858	857
Basic (Note 4) (in dollars per share)	$ 0.19	$ 0.25	$ 0.73	$ 1.60
Diluted (Note 4) (in dollars per share)	$ 0.19	$ 0.24	$ 0.72	$ 1.58
Stock options and other awards (in shares)	3	3	3	2