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Note 16 - Reportable Segments (Details)	9 Months Ended
	Sep. 30, 2015
Minimum [Member]
Note 16 - Reportable Segments (Details) [Line Items]
Number of Material Formulations	150

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- References

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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.

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Namespace Prefix:	glw_
Data Type:	xbrli:integerItemType
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