Commitments And Contingencies	3 Months Ended
Mar. 31, 2012
Commitments And Contingencies [Abstract]
Commitments And Contingencies	2. Commitments and Contingencies Asbestos Litigation Pittsburgh Corning Corporation. Corning and PPG Industries, Inc. (PPG) each own 50% of the capital stock of Pittsburgh Corning Corporation (PCC). Over a period of more than two decades, PCC and several other defendants have been named in numerous lawsuits involving claims alleging personal injury from exposure to asbestos. On April 16, 2000, PCC filed for Chapter 11 reorganization in the U.S. Bankruptcy Court for the Western District of Pennsylvania. Corning, with other relevant parties, has been involved in ongoing efforts to develop a Plan of Reorganization that would resolve the concerns and objections of the relevant courts and parties. A proposed PCC plan of reorganization (Amended PCC Plan) is currently filed in the U.S. Bankruptcy Court for the Western District of Pennsylvania but has not been confirmed by the Court. The Amended PCC Plan does not include certain non-PCC asbestos claims that may be or have been raised against Corning. Corning has recorded an additional $150 million for such claims in its estimated asbestos litigation liability. The liability for the Amended PCC Plan and the non-PCC asbestos claims was estimated to be $658 million at March 31, 2012, compared with an estimate of the liability of $657 million at December 31, 2011. In the three months ended March 31, 2012 and 2011, Corning recorded asbestos litigation expense of $1 million and $5 million, respectively. Corning also has an equity interest in Pittsburgh Corning Europe N.V. (PCE), a Belgian Corporation that is a component of the Company's proposed resolution of the PCC asbestos litigation. At March 31, 2012 and December 31, 2011, the fair value of PCE significantly exceeded its carrying value of $141 million and $138 million, respectively. The entire obligation is classified as a non-current liability as installment payments for the cash portion of the obligation are not planned to commence until more than 12 months after the Amended PCC Plan becomes effective and the PCE portion of the obligation will be fulfilled through the direct contribution of Corning's investment in PCE (currently recorded as a non-current other equity method investment). Other Commitments and Contingencies In the normal course of our business, we do not routinely provide significant third-party guarantees. When provided, these guarantees have various terms, and none of these guarantees are individually significant. Generally, third party guarantees provided by Corning are limited to certain financial guarantees including stand-by letters of credit and performance bonds, and the incurrence of contingent liabilities in the form of purchase price adjustments related to attainment of milestones. These guarantees have various terms, and none of these guarantees are individually significant. We have agreed to provide a credit facility to Dow Corning Corporation (Dow Corning). The funding of the Dow Corning credit facility will be required only if Dow Corning is not otherwise able to meet its scheduled funding obligations in its confirmed Bankruptcy Plan. We believe a significant majority of these guarantees and contingent liabilities will expire without being funded. As of March 31, 2012 and December 31, 2011, contingent guarantees totaled a notional value of $163 million and $170 million, respectively. We believe a significant majority of these contingent guarantees will expire without being funded. We also were contingently liable for purchase obligations of $72 million at March 31, 2012 and December 31, 2011. Product warranty liability accruals were $23 million at March 31, 2012 and December 31, 2011. Corning is a defendant in various lawsuits, including environmental litigation, product-related suits, the Dow Corning and PCC matters, and is subject to various claims which arise in the normal course of business. In the opinion of management, the likelihood that the ultimate disposition of these matters will have a material adverse effect on Corning's consolidated financial position, liquidity, or results of operations, is remote. In March of 2012, Corning received a grand jury subpoena issued in the United States District Court for the Eastern District of Michigan from the U.S. Department of Justice in connection with an investigation into conduct relating to possible antitrust law violations involving certain automotive products, including catalytic converters, diesel particulate filters, substrates and monoliths. Antitrust investigations can result in significant penalties being imposed by the antitrust authorities. Currently Corning can not estimate the ultimate financial impact, if any, resulting from the investigation. Such potential impact, if an antitrust violation by Corning is found, could however, be material to the results of operations of Corning in a particular period. Corning has been named by the Environmental Protection Agency (the Agency) under the Superfund Act, or by state governments under similar state laws, as a potentially responsible party for 18 hazardous waste sites. Under the Superfund Act, all parties who may have contributed any waste to a hazardous waste site, identified by the Agency, are jointly and severally liable for the cost of cleanup unless the Agency agrees otherwise. It is Corning's policy to accrue for its estimated liability related to Superfund sites and other environmental liabilities related to property owned by Corning based on expert analysis and continual monitoring by both internal and external consultants. At March 31, 2012, and December 31, 2011, Corning had accrued approximately $24 million (undiscounted) and $25 million (undiscounted), respectively, for the estimated liability for environmental cleanup and related litigation. Based upon the information developed to date, management believes that the accrued reserve is a reasonable estimate of the Company's liability and that the risk of an additional loss in an amount materially higher than that accrued is remote.

2. Commitments and Contingencies

Asbestos Litigation

Pittsburgh Corning Corporation. Corning and PPG Industries, Inc. (PPG) each own 50% of the capital stock of Pittsburgh Corning Corporation (PCC). Over a period of more than two decades, PCC and several other defendants have been named in numerous lawsuits involving claims alleging personal injury from exposure to asbestos. On April 16, 2000, PCC filed for Chapter 11 reorganization in the U.S. Bankruptcy Court for the Western District of Pennsylvania. Corning, with other relevant parties, has been involved in ongoing efforts to develop a Plan of Reorganization that would resolve the concerns and objections of the relevant courts and parties. A proposed PCC plan of reorganization (Amended PCC Plan) is currently filed in the U.S. Bankruptcy Court for the Western District of Pennsylvania but has not been confirmed by the Court.

The Amended PCC Plan does not include certain non-PCC asbestos claims that may be or have been raised against Corning. Corning has recorded an additional $150 million for such claims in its estimated asbestos litigation liability. The liability for the Amended PCC Plan and the non-PCC asbestos claims was estimated to be $658 million at March 31, 2012, compared with an estimate of the liability of $657 million at December 31, 2011. In the three months ended March 31, 2012 and 2011, Corning recorded asbestos litigation expense of $1 million and $5 million, respectively. Corning also has an equity interest in Pittsburgh Corning Europe N.V. (PCE), a Belgian Corporation that is a component of the Company's proposed resolution of the PCC asbestos litigation. At March 31, 2012 and December 31, 2011, the fair value of PCE significantly exceeded its carrying value of $141 million and $138 million, respectively. The entire obligation is classified as a non-current liability as installment payments for the cash portion of the obligation are not planned to commence until more than 12 months after the Amended PCC Plan becomes effective and the PCE portion of the obligation will be fulfilled through the direct contribution of Corning's investment in PCE (currently recorded as a non-current other equity method investment).

Other Commitments and Contingencies

In the normal course of our business, we do not routinely provide significant third-party guarantees. When provided, these guarantees have various terms, and none of these guarantees are individually significant. Generally, third party guarantees provided by Corning are limited to certain financial guarantees including stand-by letters of credit and performance bonds, and the incurrence of contingent liabilities in the form of purchase price adjustments related to attainment of milestones. These guarantees have various terms, and none of these guarantees are individually significant.

We have agreed to provide a credit facility to Dow Corning Corporation (Dow Corning). The funding of the Dow Corning credit facility will be required only if Dow Corning is not otherwise able to meet its scheduled funding obligations in its confirmed Bankruptcy Plan. We believe a significant majority of these guarantees and contingent liabilities will expire without being funded.

As of March 31, 2012 and December 31, 2011, contingent guarantees totaled a notional value of $163 million and $170 million, respectively. We believe a significant majority of these contingent guarantees will expire without being funded. We also were contingently liable for purchase obligations of $72 million at March 31, 2012 and December 31, 2011.

Product warranty liability accruals were $23 million at March 31, 2012 and December 31, 2011.

Corning is a defendant in various lawsuits, including environmental litigation, product-related suits, the Dow Corning and PCC matters, and is subject to various claims which arise in the normal course of business. In the opinion of management, the likelihood that the ultimate disposition of these matters will have a material adverse effect on Corning's consolidated financial position, liquidity, or results of operations, is remote.

In March of 2012, Corning received a grand jury subpoena issued in the United States District Court for the Eastern District of Michigan from the U.S. Department of Justice in connection with an investigation into conduct relating to possible antitrust law violations involving certain automotive products, including catalytic converters, diesel particulate filters, substrates and monoliths. Antitrust investigations can result in significant penalties being imposed by the antitrust authorities. Currently Corning can not estimate the ultimate financial impact, if any, resulting from the investigation. Such potential impact, if an antitrust violation by Corning is found, could however, be material to the results of operations of Corning in a particular period.

Corning has been named by the Environmental Protection Agency (the Agency) under the Superfund Act, or by state governments under similar state laws, as a potentially responsible party for 18 hazardous waste sites. Under the Superfund Act, all parties who may have contributed any waste to a hazardous waste site, identified by the Agency, are jointly and severally liable for the cost of cleanup unless the Agency agrees otherwise. It is Corning's policy to accrue for its estimated liability related to Superfund sites and other environmental liabilities related to property owned by Corning based on expert analysis and continual monitoring by both internal and external consultants. At March 31, 2012, and December 31, 2011, Corning had accrued approximately $24 million (undiscounted) and $25 million (undiscounted), respectively, for the estimated liability for environmental cleanup and related litigation. Based upon the information developed to date, management believes that the accrued reserve is a reasonable estimate of the Company's liability and that the risk of an additional loss in an amount materially higher than that accrued is remote.