Note 17 - Earnings Per Common Share - Reconciliation of Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net income attributable to Corning Incorporated		$ 1,316	$ 1,906	$ 512
Less: Series A convertible preferred stock dividend			24	98
Less: Excess consideration paid for redemption of preferred shares (1)	[1],[2]		803
Net income available to common shareholders		1,316	1,079	414
Net income available to common shareholders - diluted		$ 1,316	$ 1,079	$ 414
Weighted-average common shares outstanding - basic (in shares)		843	828	761
Stock options and other dilutive securities (in shares)		14	16	11
Weighted-average common shares outstanding - diluted (in shares)		857	844	772
Basic (Note 17) (in dollars per share)		$ 1.56	$ 1.30	$ 0.54
Diluted (Note 17) (in dollars per share)		$ 1.54	$ 1.28	$ 0.54
Total (in shares)		1	31	117
Series A Convertible Preferred Stock [Member]
Total (in shares)			31	115
Share-Based Payment Arrangement [Member]
Total (in shares)	[3]	1		2

[1] Refer to Note 16 (Shareholders’ Equity) in the accompanying notes to the consolidated financial statements for additional information.

[2] Refer to Note 16 (Shareholders’ Equity) in the notes to the consolidated financial statements for more information.

[3] For the years ended December 31, 2021 and 2020, the Preferred Stock was anti-dilutive and therefore excluded from the calculation of diluted earnings per share.