2.2.0.25truefalse42002 - Disclosure - Operating Segments (Consolidated Net Income) (Details)truefalseIn Millions, unless otherwise specifiedfalse1falsefalseUSDfalsefalse1/1/2010 - 3/31/2010 USD ($) $Duration_1_1_2010_To_3_31_2010http://www.sec.gov/CIK0000024741duration2010-01-01T00:00:002010-03-31T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2falsefalseUSDfalsefalse1/1/2008 - 3/31/2008 USD ($) $Duration_1_1_2008_To_3_31_2008http://www.sec.gov/CIK0000024741duration2008-01-01T00:00:002008-03-31T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$3falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $Duration_1_1_2010_To_12_31_2010http://www.sec.gov/CIK0000024741duration2010-01-01T00:00:002010-12-31T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit14Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$4falsefalseUSDfalsefalse1/1/2009 - 12/31/2009 USD ($) USD ($) / shares $Duration_1_1_2009_To_12_31_2009http://www.sec.gov/CIK0000024741duration2009-01-01T00:00:002009-12-31T00:00:00Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit14Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$5falsefalseUSDfalsefalse1/1/2008 - 12/31/2008 USD ($) USD ($) / shares $Duration_1_1_2008_To_12_31_2008http://www.sec.gov/CIK0000024741duration2008-01-01T00:00:002008-12-31T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit14Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2false0us-gaap_SegmentReportingSegmentOperatingProfitLossus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse31620000003162falsetruefalsefalsefalse4truefalsefalse19540000001954falsetruefalsefalsefalse5truefalsefalse23450000002345falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe total amount of profit or loss for reportable segments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 32 -Subparagraph b falsefalseNet income of reportable segments3false0glw_NonReportableSegmentsglwfalsedebitdurationThe total amount of profit or loss for non-reportable segments which are made up of all the operating segments that do not...falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-75000000-75falsefalsefalsefalsefalse4truefalsefalse-80000000-80falsefalsefalsefalsefalse5truefalsefalse-168000000-168falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe total amount of profit or loss for non-reportable segments which are made up of all the operating segments that do not meet the quantitative threshold for separate reporting.No authoritative reference available.falsefalseNon-reportable segments4false0glw_ReconciliationOfNetFinancingCostsglwfalsedebitdurationThese costs include interest income, interest expense, and interest costs and investment gains associated with benefit plansfalsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-183000000-183[1]falsefalsefalsefalsefalse4truefalsefalse-122000000-122[1]falsefalsefalsefalsefalse5truefalsefalse1500000015[1]falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThese costs include interest income, interest expense, and interest costs and investment gains associated with benefit plansNo authoritative reference available.falsefalseNet financing costs5false0glw_ReconciliationOfStockBasedCompensationExpenseglwfalsedebitdurationThe Company measures and recognizes cost for all share-based payment awards made to employees and directors, based on...falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-92000000-92falsefalsefalsefalsefalse4truefalsefalse-127000000-127falsefalsefalsefalsefalse5truefalsefalse-118000000-118falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe Company measures and recognizes cost for all share-based payment awards made to employees and directors, based on estimated fair value. Included in the calculation are employee stock options, time-based restricted stock and restricted stock units, performance-based restricted stock and restricted stock units, and the Worldwide Employee Share Purchase Plan.No authoritative reference available.falsefalseStock-based compensation expense6false0glw_ReconciliationOfExploratoryResearchglwfalsedebitdurationThe aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the...falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-59000000-59falsefalsefalsefalsefalse4truefalsefalse-61000000-61falsefalsefalsefalsefalse5truefalsefalse-69000000-69falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process.No authoritative reference available.falsefalseExploratory research7false0glw_ReconciliationOfCorporateContributionsglwfalsedebitdurationCorporate Contributionsfalsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-33000000-33falsefalsefalsefalsefalse4truefalsefalse-27000000-27falsefalsefalsefalsefalse5truefalsefalse-35000000-35falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCorporate ContributionsNo authoritative reference available.falsefalseCorporate contributions8false0glw_EquityInEarningsOfAffiliatedCompaniesNetOfImpairmentsglwfalsedebitdurationEquity in earnings of affiliated companies, net of impairmentsfalsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse453000000453[2]falsefalsefalsefalsefalse4truefalsefalse297000000297[2]falsefalsefalsefalsefalse5truefalsefalse382000000382[2]falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryEquity in earnings of affiliated companies, net of impairmentsNo authoritative reference available.falsefalseEquity in earnings of affiliated companies, net of impairments9false0glw_AsbestosSettlementCreditChargeglwfalsedebitdurationThe charges for the period are the result of the changes in the fair value of the components of the proposed asbestos...falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse5400000054falsefalsefalsefalsefalse2truefalsefalse327000000327falsefalsefalsefalsefalse3truefalsefalse-49000000-49[3]falsefalsefalsefalsefalse4truefalsefalse2000000020[3]falsefalsefalsefalsefalse5truefalsefalse-340000000-340[3]falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe charges for the period are the result of the changes in the fair value of the components of the proposed asbestos settlement agreement (See the Commitment and Contingency footnote and the Investment footnote for further details).No authoritative reference available.falsefalseAsbestos settlement credit charge10false0glw_ReconciliationOfOtherCorporateItemsglwfalsedebitdurationOther corporate itemsfalsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse336000000336[4]falsefalsefalsefalsefalse4truefalsefalse194000000194[4]falsefalsefalsefalsefalse5truefalsefalse25650000002565[4]falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryOther corporate itemsNo authoritative reference available.falsefalseOther corporate items11false0us-gaap_NetIncomeLossus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse35580000003558falsetruefalsefalsefalse4truefalsefalse20080000002008falsetruefalsefalsefalse5truefalsefalse52570000005257falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph d Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A7 -Appendix A Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 10, 15 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 87-21 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28, 29, 30 falsefalseNet income12false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.corning.com/role/disclosureoperatingsegmentsconsolidatednetincomedetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Display Technologies Operating Segment [Member] 1/1/2010 - 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12/31/2010 USD ($) $Duration_1_1_2010_To_12_31_201022225http://www.sec.gov/CIK0000024741duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseTelecommunications Operating Segment [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiglw_TelecommunicationsOperatingSegmentMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseTelecommunications Operating Segment [Member]16false0glw_NumberOfCustomersIndividuallyAccountingForTenPercentOrMoreOfEachSegmentSSalesglwfalsenadurationNumber Of Customers Individually Accounting For Ten Percent Or More Of Each Segment's Salesfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse11falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:integerItemTypeintegerNumber Of Customers Individually Accounting For Ten Percent Or More Of Each Segment's SalesNo authoritative reference available.falsefalseNumber of customers individually accounting for ten percent or more of each segment's sales17false0glw_PercentOfTotalSegmentSalesglwfalsenadurationPercent Of Total Segment Salesfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truetruefalse0.150.15falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepurePercent Of Total Segment SalesNo authoritative reference available.falsefalsePercent of total segment sales18false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.corning.com/role/disclosureoperatingsegmentsconsolidatednetincomedetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse8falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Environmental Technologies Operating Segment [Member] 1/1/2010 - 12/31/2010 USD ($) $Duration_1_1_2010_To_12_31_201022222http://www.sec.gov/CIK0000024741duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseEnvironmental Technologies Operating Segment [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiglw_EnvironmentalTechnologiesOperatingSegmentMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseEnvironmental Technologies Operating Segment [Member]19false0glw_NumberOfCustomersIndividuallyAccountingForTenPercentOrMoreOfEachSegmentSSalesglwfalsenadurationNumber Of Customers Individually Accounting For Ten Percent Or More Of Each Segment's Salesfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse33falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:integerItemTypeintegerNumber Of Customers Individually Accounting For Ten Percent Or More Of Each Segment's SalesNo authoritative reference available.falsefalseNumber of customers individually accounting for ten percent or more of each segment's sales20false0glw_PercentOfTotalSegmentSalesglwfalsenadurationPercent Of Total Segment Salesfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truetruefalse0.860.86falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepurePercent Of Total Segment SalesNo authoritative reference available.falsefalsePercent of total segment sales21false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.corning.com/role/disclosureoperatingsegmentsconsolidatednetincomedetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse9falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Specialty Materials Operating Segment [Member] 1/1/2010 - 12/31/2010 USD ($) $Duration_1_1_2010_To_12_31_201022224http://www.sec.gov/CIK0000024741duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseSpecialty Materials Operating Segment [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiglw_SpecialtyMaterialsOperatingSegmentMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseSpecialty Materials Operating Segment [Member]22false0glw_NumberOfCustomersIndividuallyAccountingForTenPercentOrMoreOfEachSegmentSSalesglwfalsenadurationNumber Of Customers Individually Accounting For Ten Percent Or More Of Each Segment's Salesfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse33falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:integerItemTypeintegerNumber Of Customers Individually Accounting For Ten Percent Or More Of Each Segment's SalesNo authoritative reference available.falsefalseNumber of customers individually accounting for ten percent or more of each segment's sales23false0glw_PercentOfTotalSegmentSalesglwfalsenadurationPercent Of Total Segment Salesfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truetruefalse0.430.43falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepurePercent Of Total Segment SalesNo authoritative reference available.falsefalsePercent of total segment sales24false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.corning.com/role/disclosureoperatingsegmentsconsolidatednetincomedetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse10falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Life Sciences Operating Segment [Member] 1/1/2010 - 12/31/2010 USD ($) $Duration_1_1_2010_To_12_31_201022223http://www.sec.gov/CIK0000024741duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseLife Sciences Operating Segment [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiglw_LifeSciencesOperatingSegmentMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseLife Sciences Operating Segment [Member]25false0glw_NumberOfCustomersIndividuallyAccountingForTenPercentOrMoreOfEachSegmentSSalesglwfalsenadurationNumber Of Customers Individually Accounting For Ten Percent Or More Of Each Segment's Salesfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse22falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:integerItemTypeintegerNumber Of Customers Individually Accounting For Ten Percent Or More Of Each Segment's SalesNo authoritative reference available.falsefalseNumber of customers individually accounting for ten percent or more of each segment's sales26false0glw_PercentOfTotalSegmentSalesglwfalsenadurationPercent Of Total Segment Salesfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truetruefalse0.370.37falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepurePercent Of Total Segment SalesNo authoritative reference available.falsefalsePercent of total segment sales1 (1) Net financing costs include interest expense, interest income, and interest costs and investment gains and losses associated with benefit plans. (2) Equity in earnings of affiliated companies, net of impairments and taxes is primarily equity in earnings of Dow Corning Corporation, which includes the following items: • In 2010, a $21 million credit for our share of U.S. advanced energy manufacturing tax credits. We recorded a $26 million credit for our share of a release of valuation allowances on foreign deferred tax assets. Corning also recorded a $16 million credit for our share of excess foreign tax credits from foreign dividends. • In 2009, a $29 million credit primarily for our share of excess foreign tax credits from foreign dividends and a $29 million charge for our share of restructuring charges. • In 2008, a $18 million charge representing our share of an other-than-temporary impairment of auction rate securities. 2 (2) Equity in earnings of affiliated companies, net of impairments and taxes is primarily equity in earnings of Dow Corning Corporation, which includes the following items: • In 2010, a $21 million credit for our share of U.S. advanced energy manufacturing tax credits. We recorded a $26 million credit for our share of a release of valuation allowances on foreign deferred tax assets. Corning also recorded a $16 million credit for our share of excess foreign tax credits from foreign dividends. • In 2009, a $29 million credit primarily for our share of excess foreign tax credits from foreign dividends and a $29 million charge for our share of restructuring charges. • In 2008, a $18 million charge representing our share of an other-than-temporary impairment of auction rate securities. 3 (3) In 2010, Corning recorded a net credit of $49 million primarily reflecting the change in the terms of the proposed asbestos settlement. In 2009, Corning recorded charges of $20 million to adjust the asbestos liability for the change in value of certain components of the amended PCC Plan and the estimated liability for non-PCC asbestos claims. In 2008, Corning reduced its liability for asbestos litigation by $327 million as a result of the increase in the likelihood of a settlement under recently proposed terms and a corresponding decrease in the likelihood of a settlement under terms established in 2003. Also, in 2008, Corning recorded a credit of $13 million to adjust the asbestos liability for the change in value of certain components of the Amended PCC Plan. (4) Other corporate items include the tax impact of the unallocated amounts and the following significant items: • In 2010, Corning recorded a loss of $30 million ($19 million after tax) from the repurchase of $126 million principal amount of our 6.2% senior unsecured notes due March 15, 2016 and $100 million principal amount of our 5.9% senior unsecured notes due March 15, 2014. • In 2009, Corning recorded $10 million of additional valuation allowance due to a change in judgment about the realizability of U.S. and United Kingdom deferred tax assets in future years; a $41 million tax benefit to reflect a deferred tax asset associated with Medicare Part D subsidies; a $27 million U.S. tax credit for research and experimentation expenses incurred from 2005 to 2008; and $98 million of restructuring charges. • In 2008, Corning released $2.5 billion of valuation allowances including $2.4 billion due to sustained profitability and positive future earnings projections for U.S. entities and $115 million from a change in estimate regarding 2008 U.S. taxable income. Also, we recorded a $40 million gain related to a favorable tax settlement with the Canadian Revenue Agency and net losses of $53 million on certain available-for-sale securities included in cash and short-term investments. 4 (4) Other corporate items include the tax impact of the unallocated amounts and the following significant items: • In 2010, Corning recorded a loss of $30 million ($19 million after tax) from the repurchase of $126 million principal amount of our 6.2% senior unsecured notes due March 15, 2016 and $100 million principal amount of our 5.9% senior unsecured notes due March 15, 2014. • In 2009, Corning recorded $10 million of additional valuation allowance due to a change in judgment about the realizability of U.S. and United Kingdom deferred tax assets in future years; a $41 million tax benefit to reflect a deferred tax asset associated with Medicare Part D subsidies; a $27 million U.S. tax credit for research and experimentation expenses incurred from 2005 to 2008; and $98 million of restructuring charges. • In 2008, Corning released $2.5 billion of valuation allowances including $2.4 billion due to sustained profitability and positive future earnings projections for U.S. entities and $115 million from a change in estimate regarding 2008 U.S. taxable income. Also, we recorded a $40 million gain related to a favorable tax settlement with the Canadian Revenue Agency and net losses of $53 million on certain available-for-sale securities included in cash and short-term investments. 525Operating Segments (Consolidated Net Income) (Details) (USD $)MillionsUnKnownUnKnownUnKnowntruetrue