2.2.0.25falsefalse31903 - Disclosure - Share-based Compensation (Tables)truefalsefalse1falsefalseUSDfalsefalse1/1/2010 - 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$2true0glw_ShareBasedCompensationGlwAbstractglwfalsenadurationShare-based Compensation glw [Abstract]falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShare-based Compensation glw [Abstract]falsefalseShare-based Compensation3false0us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <table border="0" cellspacing="0"> <tr><td width="36%"> </td> <td width="16%"> </td> <td width="2%"> </td> <td width="2%"> </td> <td width="15%"> </td> <td width="14%"> </td> <td width="12%"> </td></tr> <tr valign="bottom"><td align="left"> </td> <td align="left"> </td> <td align="left"> </td> <td align="right"> </td> <td align="left"> </td> <td align="center">Weighted-</td> <td align="left"> </td></tr> <tr valign="bottom"><td align="left"> </td> <td align="left"> </td> <td align="left"> </td> <td align="right"> </td> <td align="left"> </td> <td align="center">average</td> <td align="center">Aggregate</td></tr> <tr valign="bottom"><td align="left"> </td> <td align="center">Number of</td> <td align="left"> </td> <td align="right"> </td> <td align="center">Weighted-</td> <td align="center">remaining</td> <td align="center">intrinsic</td></tr> <tr valign="bottom"><td align="left"> </td> <td align="center">shares</td> <td align="left"> </td> <td align="right"> </td> <td align="center">average</td> <td align="center">contractual</td> <td align="center">value</td></tr> <tr valign="bottom"><td style="border-bottom: #000000 1px solid;" align="left"> </td> <td style="border-bottom: #000000 1px solid;" align="center">(in thousands)</td> <td style="border-bottom: #000000 1px solid;" align="left"> </td> <td style="border-bottom: #000000 1px solid;" align="right"> </td> <td style="border-bottom: #000000 1px solid;" align="center">exercise price</td> <td style="border-bottom: #000000 1px solid;" align="center">term in years</td> <td style="border-bottom: #000000 1px solid;" align="center">(in thousands)</td></tr> <tr valign="bottom"><td align="left">Options outstanding as of December 31, 2009</td> <td align="right">92,504</td> <td align="left"> </td> <td align="right">$</td> <td align="right">25.83</td> <td align="left"> </td> <td align="left"> </td></tr> <tr valign="bottom"><td style="text-indent: 2px;" align="left">Granted</td> <td align="right">5,635</td> <td align="left"> </td> <td align="right"> </td> <td align="right">18.52</td> <td align="left"> </td> <td align="left"> </td></tr> <tr valign="bottom"><td style="text-indent: 2px;" align="left">Exercised</td> <td align="right">(6,310</td> <td align="left">)</td> <td align="right"> </td> <td align="right">9.24</td> <td align="left"> </td> <td align="left"> </td></tr> <tr valign="bottom"><td style="border-bottom: #000000 1px solid; text-indent: 2px;" align="left">Forfeited and expired</td> <td style="border-bottom: #000000 1px solid;" align="right">(19,368</td> <td style="border-bottom: #000000 1px solid;" align="left">)</td> <td style="border-bottom: #000000 1px solid;" align="right"> </td> <td style="border-bottom: #000000 1px solid;" align="center">65.07</td> <td style="border-bottom: #000000 1px solid;" align="left"> </td> <td style="border-bottom: #000000 1px solid;" align="left"> </td></tr> <tr valign="bottom"><td align="left">Options outstanding as of December 31, 2010</td> <td align="right">72,461</td> <td align="left"> </td> <td align="right"> </td> <td align="center">16.22</td> <td align="center">4.88</td> <td align="center">407,255</td></tr> <tr valign="bottom"><td style="border-bottom: #000000 1px solid;" align="left">Options exercisable as of December 31, 2010</td> <td style="border-bottom: #000000 1px solid;" align="right">57,319</td> <td style="border-bottom: #000000 1px solid;" align="left"> </td> <td style="border-bottom: #000000 1px solid;" align="right"> </td> <td style="border-bottom: #000000 1px solid;" align="center">16.41</td> <td style="border-bottom: #000000 1px solid;" align="center">4.03</td> <td style="border-bottom: #000000 1px solid;" align="center">333,144</td></tr></table> </div>          Weighted-             average Aggregate   NumberfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringAll required disclosures by grouped ranges of option exercise prices, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph f falsefalseSchedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range4false0glw_ScheduleOfValuationOfOptionGrantsUnderOurStockOptionPlansOfBlackScholesglwfalsenadurationSchedule Of Valuation Of Option Grants Under Our Stock Option Plans Of Black Scholesfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00<div> <table border="0" cellspacing="0"> <tr><td width="40%"> </td> <td width="27%"> </td> <td width="2%"> </td> <td width="12%"> </td> <td width="2%"> </td> <td width="10%"> </td> <td width="2%"> </td></tr> <tr valign="bottom"><td style="border-bottom: #000000 1px solid;" colspan="2" align="left">The following inputs were used for the valuation of option grants under our Stock Option Plans:</td> <td style="border-bottom: #000000 1px solid;" align="left"> </td> <td style="border-bottom: #000000 1px solid;" align="left"> </td> <td style="border-bottom: #000000 1px solid;" align="left"> </td> <td style="border-bottom: #000000 1px solid;" align="left"> </td> <td style="border-bottom: #000000 1px solid;" align="left"> </td></tr> <tr valign="bottom"><td style="border-bottom: #000000 1px solid;" align="left"> </td> <td style="border-bottom: #000000 1px solid;" align="right">2010</td> <td style="border-bottom: #000000 1px solid;" align="left"> </td> <td style="border-bottom: #000000 1px solid;" align="right">2009</td> <td style="border-bottom: #000000 1px solid;" align="left"> </td> <td style="border-bottom: #000000 1px solid;" align="right">2008</td> <td style="border-bottom: #000000 1px solid;" align="left"> </td></tr> <tr valign="bottom"><td style="text-indent: 1px;" align="left">Expected volatility</td> <td align="right">48-49</td> <td align="left">%</td> <td align="right">40-60</td> <td align="left">%</td> <td align="right">31-88</td> <td align="left">%</td></tr> <tr valign="bottom"><td style="text-indent: 1px;" align="left">Weighted-average volatility</td> <td align="right">48-49</td> <td align="left">%</td> <td align="right">54-55</td> <td align="left">%</td> <td align="right">49-58</td> <td align="left">%</td></tr> <tr valign="bottom"><td style="text-indent: 1px;" align="left">Dividend yield</td> <td align="right">1.13-1.40%</td> <td align="left"> </td> <td align="right">1.40-1.59%</td> <td align="left"> </td> <td align="right">0.82-1.31%</td> <td align="left"> </td></tr> <tr valign="bottom"><td style="text-indent: 1px;" align="left">Risk-free rate</td> <td align="right">1.5-3.2</td> <td align="left">%</td> <td align="right">0.1-5.6</td> <td align="left">%</td> <td align="right">0.02-6.0</td> <td align="left">%</td></tr> <tr valign="bottom"><td style="text-indent: 1px;" align="left">Average risk-free rate</td> <td align="right">2-3.2</td> <td align="left">%</td> <td align="right">2.7-3.8</td> <td align="left">%</td> <td align="right">2.8-4.1</td> <td align="left">%</td></tr> <tr valign="bottom"><td style="text-indent: 1px;" align="left">Expected term (in years)</td> <td align="right">5.1-6.5</td> <td align="left"> </td> <td align="left"> </td> <td align="left"> </td> <td align="left"> </td> <td align="left"> </td></tr> <tr valign="bottom"><td style="text-indent: 1px;" align="left">Expected time to exercise (in years)</td> <td align="left"> </td> <td align="left"> </td> <td align="right">1.6-5.8</td> <td align="left"> </td> <td align="right">1.9-6.7</td> <td align="left"> </td></tr> <tr valign="bottom"><td style="border-bottom: #000000 1px solid; text-indent: 1px;" align="left">Pre-vesting departure rate</td> <td style="border-bottom: #000000 1px solid;" align="right">1.4-3.6</td> <td style="border-bottom: #000000 1px solid;" align="left">%</td> <td style="border-bottom: #000000 1px solid;" align="right">1.3-2.8</td> <td style="border-bottom: #000000 1px solid;" align="left">%</td> <td style="border-bottom: #000000 1px solid;" align="right">1.4-2.7</td> <td style="border-bottom: #000000 1px solid;" align="left">%</td></tr></table> </div>The following inputs were used for the valuation of option grants under our Stock OptionfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringSchedule Of Valuation Of Option Grants Under Our Stock Option Plans Of Black ScholesNo authoritative reference available.falsefalseValuation of Option Grants Under Our Stock Option Plans of Black Scholes5false0glw_TimeBasedRestrictedStockAndRestrictedStockUnitsglwfalsenadurationTime-Based Restricted Stock and Restricted Stock Unitsfalsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<div> <table border="0" cellspacing="0"> <tr><td width="59%"> </td> <td width="24%"> </td> <td width="2%"> </td> <td width="2%"> </td> <td width="10%"> </td></tr> <tr valign="bottom"><td align="left"> </td> <td align="left"> </td> <td align="left"> </td> <td align="right"> </td> <td align="center">Weighted-</td></tr> <tr valign="bottom"><td align="left"> </td> <td align="left"> </td> <td align="left"> </td> <td align="right"> </td> <td align="right">average</td></tr> <tr valign="bottom"><td align="left"> </td> <td align="right">Shares</td> <td align="left"> </td> <td align="right"> </td> <td align="center">grant-date</td></tr> <tr valign="bottom"><td style="border-bottom: #000000 1px solid;" align="left"> </td> <td style="border-bottom: #000000 1px solid;" align="right">(000</td> <td style="border-bottom: #000000 1px solid;" align="left">'s)</td> <td style="border-bottom: #000000 1px solid;" align="right"> </td> <td style="border-bottom: #000000 1px solid;" align="center">fair value</td></tr> <tr valign="bottom"><td align="left">Nonvested shares at December 31, 2009</td> <td align="right">3,880</td> <td align="left"> </td> <td align="right">$</td> <td align="center">18.59</td></tr> <tr valign="bottom"><td align="left">Granted</td> <td align="right">388</td> <td align="left"> </td> <td align="right"> </td> <td align="center">18.59</td></tr> <tr valign="bottom"><td align="left">Vested</td> <td align="right">(560</td> <td align="left">)</td> <td align="right"> </td> <td align="center">20.59</td></tr> <tr valign="bottom"><td style="border-bottom: #000000 1px solid;" align="left">Forfeited</td> <td style="border-bottom: #000000 1px solid;" align="right">(10</td> <td style="border-bottom: #000000 1px solid;" align="left">)</td> <td style="border-bottom: #000000 1px solid;" align="right"> </td> <td style="border-bottom: #000000 1px solid;" align="center">17.82</td></tr> <tr valign="bottom"><td style="border-bottom: #000000 1px solid;" align="left">Nonvested shares and share units at December 31, 2010</td> <td style="border-bottom: #000000 1px solid;" align="right">3,698</td> <td style="border-bottom: #000000 1px solid;" align="left"> </td> <td style="border-bottom: #000000 1px solid;" align="right"> </td> <td style="border-bottom: #000000 1px solid;" align="center">18.33</td></tr></table> </div>        Weighted-         average   Shares     grant-date   (000 's)   fair value NonvestedfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringTime-Based Restricted Stock and Restricted Stock UnitsNo authoritative reference available.falsefalseTime-Based Restricted Stock and Restricted Stock Units6false0glw_PerformanceBasedRestrictedStockAndRestrictedStockUnitsglwfalsenadurationPerformance-Based Restricted Stock and Restricted Stock Unitsfalsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<div> <table border="0" cellspacing="0"> <tr><td width="66%"> </td> <td width="17%"> </td> <td width="2%"> </td> <td width="2%"> </td> <td width="11%"> </td></tr> <tr valign="bottom"><td align="left"> </td> <td align="left"> </td> <td align="left"> </td> <td align="right"> </td> <td align="center">Weighted-</td></tr> <tr valign="bottom"><td align="left"> </td> <td align="left"> </td> <td align="left"> </td> <td align="right"> </td> <td align="right">average</td></tr> <tr valign="bottom"><td align="left"> </td> <td align="right">Shares</td> <td align="left"> </td> <td align="right"> </td> <td align="center">grant-date</td></tr> <tr valign="bottom"><td style="border-bottom: #000000 1px solid;" align="left"> </td> <td style="border-bottom: #000000 1px solid;" align="right">(000</td> <td style="border-bottom: #000000 1px solid;" align="left">'s)</td> <td style="border-bottom: #000000 1px solid;" align="right"> </td> <td style="border-bottom: #000000 1px solid;" align="center">fair value</td></tr> <tr valign="bottom"><td align="left">Nonvested restricted stock at December 31, 2009</td> <td align="right">6,377</td> <td align="left"> </td> <td align="right">$</td> <td align="right">13.47</td></tr> <tr valign="bottom"><td align="left">Granted</td> <td align="right">1,844</td> <td align="left"> </td> <td align="right"> </td> <td align="right">8.67</td></tr> <tr valign="bottom"><td align="left">Vested</td> <td align="right">(2,062</td> <td align="left">)</td> <td align="right"> </td> <td align="right">21.83</td></tr> <tr valign="bottom"><td style="border-bottom: #000000 1px solid;" align="left">Forfeited</td> <td style="border-bottom: #000000 1px solid;" align="right">(87</td> <td style="border-bottom: #000000 1px solid;" align="left">)</td> <td style="border-bottom: #000000 1px solid;" align="right"> </td> <td style="border-bottom: #000000 1px solid;" align="right">8.67</td></tr> <tr valign="bottom"><td style="border-bottom: #000000 1px solid;" align="left">Nonvested restricted stock and restricted stock units at December 31, 2010</td> <td style="border-bottom: #000000 1px solid;" align="right">6,072</td> <td style="border-bottom: #000000 1px solid;" align="left"> </td> <td style="border-bottom: #000000 1px solid;" align="right"> </td> <td style="border-bottom: #000000 1px solid;" align="right">9.24</td></tr></table> </div>        Weighted-         average   Shares     grant-date   (000 's)   fair value NonvestedfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPerformance-Based Restricted Stock and Restricted Stock UnitsNo authoritative reference available.falsefalsePerformance-Based Restricted Stock and Restricted Stock Units15Share-based Compensation (Tables)UnKnownUnKnownUnKnownUnKnownfalsetrue