XML 118 R105.htm IDEA: XBRL DOCUMENT v3.10.0.1

Reportable Segments (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018 item
Reportable Segments [Abstract]
Number of Material Formulations	150
Segment tax rate	21.00%

X

- 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

X

- Definition

Segment Tax Rate

+ References

No definition available.

+ Details

Name:	glw_SegmentTaxRate
Namespace Prefix:	glw_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_SegmentReportingAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration