Note 17 - Reportable Segments - Reconciliation of Reportable Segment Net Income (Loss) to Consolidated Net Income (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net income attributable to Corning Incorporated		$ 581	$ 1,316	$ 1,906
Gain on foreign currency hedges related to translated earnings		161	351	354
Research, development and engineering expenses		1,076	1,047	995
Amortization of intangibles		(122)	(123)	(129)
Interest expense, net		(329)	(292)	(300)
Income tax benefit		(168)	(411)	(491)
Severance (charges) credits (2)	[1]	(187)	(70)	13
Operating Segments [Member]
Net income attributable to Corning Incorporated		1,973	2,254	2,296
Impact of constant currency reporting	[2]	(992)	(616)	(38)
Research, development and engineering expenses	[3]	863	874	838
Income tax benefit	[4]	541	615	612
Operating Segments [Member] | Reportable Segments [Member]
Net income attributable to Corning Incorporated		1,958	2,215	2,347
Operating Segments [Member] | Hemlock and Emerging Growth Businesses [Member]
Net income attributable to Corning Incorporated	[5]	15	39	(51)
Research, development and engineering expenses	[3]	162	163	160
Income tax benefit	[4]	22	24	(11)
Segment Reconciling Items [Member]
Net income attributable to Corning Incorporated		581	1,316	1,906
Impact of constant currency reporting		(744)	(480)	(87)
Gain on foreign currency hedges related to translated earnings		161	348	354
Translation gain on Japanese yen-denominated debt		100	191	180
Litigation, regulatory and other legal matters		(61)	(100)	(16)
Research, development and engineering expenses	[5],[6]	(162)	(163)	(151)
Amortization of intangibles		(122)	(123)	(129)
Interest expense, net		(244)	(237)	(265)
Income tax benefit		373	204	120
Pension mark-to-market		(15)	(11)	(32)
Severance (charges) credits (2)	[6]	(187)	(70)	13
Capacity optimization and other charges and credits (3)	[7]	(284)	(344)	(123)
Bond redemption loss (4)	[8]			(31)
Gain on sale of business			53	54
Other corporate items		$ (207)	$ (206)	$ (277)

[1] Severance charges in the year ended December 31, 2023 include $20 million in curtailment and special termination benefit charges.

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

[3] Research, development and engineering expenses include direct project spending that is identifiable to a segment.

[4] Income tax (provision) benefit reflects a tax rate of 21%.

[5] Amount does not include research, development and engineering expense related to restructuring, impairment and other charges and credits and pension mark-to-market.

[6] Refer to Note 2 (Restructuring, Impairment and Other Charges and Credits) in the notes to the consolidated financial statements for additional information.

[7] Amount includes charges associated with impairment losses, asset write-offs, accelerated depreciation, disposal costs and inventory write-downs. Refer to Note 2 (Restructuring, Impairment and Other Charges and Credits) in the notes to the consolidated financial statements for additional information.

[8] Refer to Note 10 (Debt) in the notes to the consolidated financial statements for additional information.