Document And Entity Information	9 Months Ended
	Sep. 30, 2012	Oct. 15, 2012
Document And Entity Information [Abstract]
Entity Registrant Name	CORNING INC /NY
Entity Central Index Key	0000024741
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2012
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2012
Entity Common Stock, Shares Outstanding		1,477,841,448