Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net sales		$ 3,615	$ 3,001	$ 10,406	$ 7,953
Cost of sales		2,294	2,000	6,614	5,635
Gross margin		1,321	1,001	3,792	2,318
Operating expenses:
Selling, general and administrative expenses		486	480	1,351	1,276
Research, development and engineering expenses		251	231	715	922
Amortization of purchased intangibles		32	33	97	87
Operating income		552	257	1,629	33
Equity in earnings (losses) of affiliated companies		16	(76)	31	17
Interest income		3	3	8	12
Interest expense		(72)	(70)	(227)	(201)
Translated earnings contract (loss) gain, net (Note 12)		(13)	(100)	262	5
Transaction-related gain, net (Note 3)			498		498
Other (expense) income, net		(6)	(62)	118	(71)
Income before income taxes		480	450	1,821	293
Provision for income taxes (Note 5)		(109)	(23)	(402)	(33)
Net income attributable to Corning Incorporated		$ 371	$ 427	$ 1,419	$ 260
Earnings per common share available to common shareholders:
Basic (Note 6) (in dollars per share)		$ 0.44	$ 0.53	$ 0.72	$ 0.25
Diluted (Note 6) (in dollars per share)		$ 0.43	$ 0.48	$ 0.71	$ 0.24
Net income attributable to Corning Incorporated		$ 371	$ 427	$ 1,419	$ 260
Series A convertible preferred stock dividend			(24)	(24)	(73)
Excess consideration paid for redemption of preferred shares	[1]			(803)
Net income available to common shareholders		$ 371	$ 427	$ 592	$ 187

[1] Refer to Note 6 (Earnings per Share) and Note 14 (Shareholders' Equity) to the consolidated financial statements for additional information.