Consolidated Statements of Income (Loss) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement [Abstract]
Net sales	$ 4,100	$ 3,391	$ 11,414	$ 9,617
Cost of sales	2,580	2,254	7,288	6,538
Gross margin	1,520	1,137	4,126	3,079
Operating expenses:
Selling, general and administrative expenses	624	510	1,610	1,432
Research, development and engineering expenses	280	294	826	814
Amortization of purchased intangibles	27	31	83	91
Operating income	589	302	1,607	742
Interest income	10	12	27	34
Interest expense	(78)	(83)	(243)	(250)
Translated earnings contract gain (loss), net (Note 11)	33	(157)	63	(91)
Other expense, net	(4)	(166)	(80)	(59)
Income (loss) before income taxes	550	(92)	1,374	376
Provision for income taxes (Note 13)	(80)	(3)	(219)	(124)
Net income (loss)	470	(95)	1,155	252
Net income attributable to non-controlling interest	(40)	(22)	(99)	(56)
Net income (loss) attributable to Corning Incorporated	$ 430	$ (117)	$ 1,056	$ 196
Earnings (loss) per common share available to common shareholders:
Basic (Note 15) (in dollars per share)	$ 0.50	$ (0.14)	$ 1.24	$ 0.23
Diluted (Note 15) (in dollars per share)	$ 0.50	$ (0.14)	$ 1.21	$ 0.23

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. Also included are the engineering expenses that are incurred while working on new product design, capacity, optimization programs, etc for products that are not currently being produced.

No definition available.