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Note 13 - Hedging Activities (Details Textual) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Billions | Jun. 30, 2016 | Dec. 31, 2015
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Gross Notional Value, Translated Earnings Contracts [Member] |  |
Derivative, Notional Amount | $ 19.1 | $ 12.0
Gross Notional Value, Collar Options [Member] |  |
Derivative, Notional Amount | 3.7 | 5.6
Gross Notional Value, Foreign Exchange Forward [Member] |  |
Derivative, Notional Amount | 15.4 | 6.4
Net Notional Value, Collar Options [Member] |  |
Derivative, Notional Amount | $ 1.9 | $ 2.9

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=glw_GrossNotionalValueTranslatedEarningsContractsMember
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Data Type: | na
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- Details
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Data Type: | na
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Period Type: |

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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=glw_GrossNotionalValueCollarOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
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Period Type: |

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- Details
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Data Type: | na
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