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Summary of Significant Accounting Policies (Useful Life of Equipment) (Details) | 12 Months Ended
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Dec. 31, 2018
Computer Hardware and Software [Member] | Minimum [Member] |
Useful Life | 3 years
Computer Hardware and Software [Member] | Maximum [Member] |
Useful Life | 7 years
Manufacturing Equipment [Member] | Minimum [Member] |
Useful Life | 2 years
Manufacturing Equipment [Member] | Maximum [Member] |
Useful Life | 15 years
Furniture and Fixtures [Member] | Minimum [Member] |
Useful Life | 5 years
Furniture and Fixtures [Member] | Maximum [Member] |
Useful Life | 10 years
Transportation Equipment [Member] | Minimum [Member] |
Useful Life | 3 years
Transportation Equipment [Member] | Maximum [Member] |
Useful Life | 20 years

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ComputerEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=glw_ManufacturingEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_TransportationEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |