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Note 11 - Other Assets and Other Liabilities (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Nov. 12, 2013
Pittsburgh Corning Corporation (PCC) [Member] | PPG Industries, Inc. [Member]      
Note 11 - Other Assets and Other Liabilities (Details) [Line Items]      
Equity Method Investment, Ownership Percentage 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= glw_PPGIndustriesIncMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= glw_PittsburghCorningCorporationPCCMember
   
Pittsburgh Corning Corporation (PCC) [Member]      
Note 11 - Other Assets and Other Liabilities (Details) [Line Items]      
Equity Method Investment, Ownership Percentage 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= glw_PittsburghCorningCorporationPCCMember
   
Pittsburgh Corning Europe (PCE) [Member]      
Note 11 - Other Assets and Other Liabilities (Details) [Line Items]      
Equity Method Investments, Fair Value Disclosure $ 241us-gaap_EquityMethodInvestmentsFairValueDisclosure
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= glw_PittsburghCorningEuropePCEMember
$ 250us-gaap_EquityMethodInvestmentsFairValueDisclosure
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= glw_PittsburghCorningEuropePCEMember
 
Amended Pittsburgh Corning Corporation Plan [Member] | Asbestos Litigation [Member]      
Note 11 - Other Assets and Other Liabilities (Details) [Line Items]      
Loss Contingency, Required Payments Per Reorganization Plan     290glw_LossContingencyRequiredPaymentsPerReorganizationPlan
/ us-gaap_LitigationCaseAxis
= glw_AsbestosLitigationMember
/ us-gaap_RestructuringPlanAxis
= glw_AmendedPittsburghCorningCorporationPlanMember
Amended PCC Plan and Non-PCC Asbestos Claims [Member]      
Note 11 - Other Assets and Other Liabilities (Details) [Line Items]      
Loss Contingency, Estimate of Possible Loss 681us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_LitigationCaseAxis
= glw_AmendedPCCPlanAndNonPCCAsbestosClaimsMember
690us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_LitigationCaseAxis
= glw_AmendedPCCPlanAndNonPCCAsbestosClaimsMember
 
Non-PCC Asbestos Litigation [Member]      
Note 11 - Other Assets and Other Liabilities (Details) [Line Items]      
Loss Contingency Accrual, Period Increase (Decrease) $ 150us-gaap_LossContingencyAccrualCarryingValuePeriodIncreaseDecrease
/ us-gaap_LitigationCaseAxis
= glw_NonPCCAsbestosLitigationMember
   
Undiscounted Projection of Claims and Related Legal Fees, Period 20 years