Commitments And Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended					9 Months Ended						9 Months Ended						9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Mar. 31, 2010	Sep. 30, 2011		Sep. 30, 2010		Dec. 31, 2010	Sep. 30, 2011 Corning Inc. [Member]	Sep. 30, 2011 Corning Inc. [Member] Asbestos Litigation [Member]	Sep. 30, 2011 Corning Inc. [Member] PPG Industries, Inc. [Member]	Sep. 30, 2011 Contingent Guarantees [Member]	Dec. 31, 2010 Contingent Guarantees [Member]	Sep. 30, 2011 Environmental Cleanup And Related Litigation [Member]	Dec. 31, 2010 Environmental Cleanup And Related Litigation [Member]	Sep. 30, 2011 Asbestos Litigation [Member] Pittsburgh Corning Corporation [Member]	Apr. 16, 2000 Asbestos Litigation [Member] Pittsburgh Corning Corporation [Member]
Commitments And Contingencies [Line Items]
Percent ownership in PCC											50.00%		50.00%
Number of pending claims												38,600							11,800
Number of pending cases												10,200
Loss contingency estimated claims period, years						20
Estimated product liability	$ 649					$ 649				$ 633
Asbestos litigation charge	5		6			15		13
Asbestos settlement credit charge	5	[1]	6	[1]	(54)	15	[1]	(41)	[1]
Contingencies	265					265				408
Notional value of contingent guarantees														176	230
Product warranty liability accrual	25					25				24
Number of hazardous waste sites	18					18
Accrual for contingent loss																30	30
Payment for product liability under settlement agreement - within one year																		100
Payment for product liability under settlement agreement - year two																		50
Payment for product liability under settlement agreement - year three																		50
Payment for product liability under settlement agreement - year four																		50
Payment for product liability under settlement agreement - year five																		50
Payment for product liability under settlement agreement - year six																		50
Further modification to amended PCC plan, initial payment																		30
Further modification to amended PCC, second and fourth payments																		15
Additional accrual for non-PCC asbestos claims												$ 150

[1] In the three and nine months ended September 30, 2011, Corning recorded a charge of $5 million and $15 million, respectively, to adjust the asbestos liability for the change in value of the components of the Amended PCC Plan. In the three and nine months ended September 30, 2010, Corning recorded a charge of $6 million and a net credit of $41 million, respectively, primarily reflecting the change in the terms of the proposed asbestos settlement.