Document And Entity Information (USD $) In Billions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Jan. 31, 2013	Jun. 29, 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	FY
Document Fiscal Year Focus	2012
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2012
Entity Common Stock, Shares Outstanding		1,472,398,789
Entity Current Reporting Status	Yes
Entity Well-known Seasoned Issuer	Yes
Entity Public Float			$ 19