Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Consolidated Statements of Income [Abstract]
Net sales	$ 2,497	$ 2,360	$ 4,872	$ 4,407
Cost of sales	1,512	1,409	2,930	2,692
Gross margin	985	951	1,942	1,715
Operating expenses:
Selling, general and administrative expenses	379	499	695	802
Research, development and engineering expenses	207	192	407	382
Amortization of purchased intangibles	18	15	35	29
Restructuring, impairment and other charges		(2)		78
Operating income	381	247	805	424
Equity in earnings of affiliated companies	37	41	117	100
Interest income	11	6	23	12
Interest expense	(38)	(40)	(75)	(81)
Translated earnings contract gain (loss), net	219	(1,201)	(219)	(2,058)
Gain on realignment of equity investment		2,676		2,676
Other expense, net	(18)	(26)	(39)	(42)
Income before income taxes	592	1,703	612	1,031
(Provision) benefit for income taxes (Note 4)	(153)	504	(87)	808
Net income attributable to Corning Incorporated	$ 439	$ 2,207	$ 525	$ 1,839
Earnings (loss) per common share attributable to Corning Incorporated:
Basic (Note 5)	$ 0.46	$ 2.06	$ 0.52	$ 1.66
Diluted (Note 5)	0.42	1.87	0.50	1.53
Dividends declared per common share	$ 0.155	$ 0.135	$ 0.31	$ 0.27