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This excludes temporary equity and is sometimes called permanent equity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 25 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 26 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A3 -Appendix A falsefalseBalance3false0us-gaap_CommonStockSharesOutstandingus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsetruefalsefalseperiodstartlabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4truefalsefalse16160000001616falsefalsefalsetruefalse5truefalsefalse16090000001609falsefalsefalsetruefalse6truefalsefalse15980000001598falsefalsefalsetruefalse7truefalsefalse16260000001626falsefalsefalsetruefalse8truefalsefalse-64000000-64falsefalsefalsetruefalse9truefalsefalse-62000000-62falsefalsefalsetruefalse10truefalsefalse-30000000-30falsefalsefalsetruefalse11truefalsefalse-65000000-65falsefalsefalsetruefalseSharesxbrli:sharesItemTypesharesTotal number of shares of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares represent the ownership interest of the common shareholders. Excludes common shares repurchased by the entity and held as Treasury shares. Shares outstanding equals shares issued minus shares held in treasury. Does not include common shares that have been repurchased.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 falsefalseBalance, common stock shares4false0glw_NumberOfSharesIssuedToBenefitPlansAndForOptionExercisesglwfalsenadurationNumber od shares issued during the period as a result of an employee stock purchase plan.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4truefalsefalse1000000010falsefalsefalsetruefalse5truefalsefalse70000007falsefalsefalsetruefalse6truefalsefalse1100000011falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9truefalsefalse-1000000-1falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseSharesxbrli:sharesItemTypesharesNumber od shares issued during the period as a result of an employee stock purchase plan.No authoritative reference available.falsefalseShares issued to benefit plans and for option exercises, shares5false0glw_SharesIssuedToBenefitPlansAndForOptionExercisesglwfalsenadurationNumber of shares issued during the period as a result of the exercise of stock options and as a result of an employee stock...falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse146000000146falsefalsefalsefalsefalse2truefalsefalse171000000171falsefalsefalsefalsefalse3truefalsefalse222000000222falsefalsefalsefalsefalse4truefalsefalse50000005falsefalsefalsetruefalse5truefalsefalse40000004falsefalsefalsetruefalse6truefalsefalse60000006falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9truefalsefalse-36000000-36falsefalsefalsetruefalse10truefalsefalse-6000000-6falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryNumber of shares issued during the period as a result of the exercise of stock options and as a result of an employee stock purchase plan.No authoritative reference available.falsefalseShares issued to benefit plans and for option exercises6false0us-gaap_TreasuryStockNumberOfSharesHeldus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10truefalsefalse-30000000-30falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseSharesxbrli:sharesItemTypesharesNumber of shares held for each class of treasury stock.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 1 -Section B -Paragraph 7, 11A falsefalseShared purchased for treasury, shares7false0us-gaap_TreasuryStockValueAcquiredCostMethodus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-625000000-625falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10truefalsefalse-625000000-625falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryCost of common and preferred stock that were repurchased during the period. 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