Consolidated Statements Of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Consolidated Statements Of Income [Abstract]
Net sales	$ 1,908		$ 2,005		$ 3,828		$ 3,928
Cost of sales	1,111		1,116		2,217		2,165
Gross margin	797		889		1,611		1,763
Operating expenses:
Selling, general and administrative expenses	291		284		570		534
Research, development and engineering expenses	188		172		375		328
Amortization of purchased intangibles	4		4		9		7
Asbestos litigation charge	5	[1]	5	[1]	6	[1]	10	[1]
Operating income	309		424		651		884
Equity in earnings of affiliated companies (Note 8)	259		428		477		826
Interest income	3		5		7		9
Interest expense	(24)		(22)		(44)		(49)
Other income, net (Note 1)	8		43		37		70
Income before income taxes	555		878		1,128		1,740
Provision for income taxes (Note 4)	(93)		(123)		(204)		(237)
Net income attributable to Corning Incorporated	$ 462		$ 755		$ 924		$ 1,503
Earnings per common share attributable to Corning Incorporated:
Basic (Note 5)	$ 0.31		$ 0.48		$ 0.61		$ 0.96
Diluted (Note 5)	$ 0.30		$ 0.47		$ 0.61		$ 0.95
Dividends declared per common share	$ 0.075		$ 0.05		$ 0.15		$ 0.10

[1] In the three and six months ended June 30, 2012, Corning recorded a charge of $5 million and $6 million, respectively, to adjust the asbestos liability for the change in value of the components of the Amended PCC Plan. In the three and six months ended June 30, 2011, Corning recorded a charge of $5 million and $10 million, respectively, to adjust the asbestos liability for the change in value of the components of the Amended PCC Plan.