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v3.19.1

Reportable Segments (Narrative) (Details) | 3 Months Ended
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Mar. 31, 2019 item
Reportable Segments [Abstract] |
Number of Material Formulations | 150

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- Definition The number of material formulations for glass, glass ceramics and fluoride crystals provided by the Specialty Materials Segment. + References No definition available. + Details
Name: | glw_NumberOfMaterialFormulations
Namespace Prefix: | glw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration