Note 19 - Reportable Segments - Reconciliation of Reportable Segments and All Other Net Sales to Consolidated Net Sales (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net sales of reportable segments	[1]		$ 294	$ 272	$ 261
Cumulative adjustment related to customer contract		$ (105)
Consolidated net sales			14,189	14,082	11,303
Operating Segments [Member]
Net sales of reportable segments	[1]		14,805	14,120	11,452
Impact of constant currency reporting (2)	[2]		(616)	(38)	(44)
Consolidated net sales			14,189	14,082	11,303
Operating Segments [Member] | Reportable Segments [Member]
Net sales of reportable segments			13,143	12,877	10,987
Operating Segments [Member] | Hemlock and Emerging Growth Businesses [Member]
Net sales of reportable segments	[3],[4]		1,662	1,243	465
Segment Reconciling Items [Member]
Impact of constant currency reporting (2)			(480)	(87)	(22)
Cumulative adjustment related to customer contract	[5]				$ (105)	[6]

[1] Net sales are attributed to countries based on location of customer.

[2] This amount primarily represents the impact of foreign currency adjustments in the Display Technologies segment.

[3] Corning obtained a controlling interest in HSG during the third quarter of 2020 and has consolidated results in Hemlock and Emerging Growth Businesses since September 9, 2020. Refer to Note 3 (HSG Transactions and Acquisitions) in the notes to the consolidated financial statements for additional information.

[4] Corning obtained a controlling interest in HSG during the third quarter of 2020 and has consolidated results in Hemlock and Emerging Growth Businesses since September 9, 2020. Refer to Note 3 (HSG Transactions and Acquisitions) in the notes to the consolidated financial statements for more information.

[5] Amount represents the negative impact of a cumulative adjustment recorded during the first quarter of 2020 to reduce revenue in the amount of $105 million. The adjustment was associated with a previously recorded commercial benefit asset, reflected as a prepayment, to a customer with a long-term supply agreement that substantially exited its production of LCD panels.

[6] Amount represents the negative impact of a cumulative adjustment to reduce revenue in the amount of $105 million recorded during the first quarter of 2020. The adjustment was associated with a previously recorded commercial benefit asset, reflected as a prepayment, to a customer with a long-term supply agreement that substantially exited its production of LCD panels.