Note 10 - Hedging Activities - Summary of Effect of Designated Derivative Financial Instruments on Consolidated Financial Statements (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Consolidated net sales	$ 3,173	$ 3,488	$ 9,594	$ 10,783
Cost of sales	2,169	2,426	6,574	7,192
Gain (loss) recognized in other comprehensive income	28	4	102	24
Foreign exchange contracts and other	33	106	128	391
Net income attributable to Corning Incorporated	164	208	621	1,352
Foreign Exchange Contract [Member]
Gain (loss) recognized in other comprehensive income	28	4	102	24
Reclassification out of Accumulated Other Comprehensive Income [Member]
Consolidated net sales		15		38
Cost of sales	14	6	32	19
Foreign exchange contracts and other	(1)	(1)	(3)	(3)
Net income attributable to Corning Incorporated	$ 13	$ 20	$ 29	$ 54