XML 34 R24.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Income Taxes (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2018
Income Taxes [Abstract] |
Provision for Income Taxes |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Three Months Ended |  | Nine Months Ended
﻿ |  | September 30, |  | September 30,
﻿ |  | 2018 |  | 2017 |  | 2018 |  | 2017
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿Provision for income taxes |  | $ | (133) |  | $ | (89) |  | $ | (383) |  | $ | (176)
﻿Effective tax rate |  |  | 17.5% |  |  | 18.6% |  |  | 33.1% |  |  | 16.1%
﻿

X
- Definition Tabular disclosure of the provision for income taxes and the related effective income tax rates. + References No definition available. + Details
Name: | glw_ScheduleOfIncomeTaxProvisionsAndRatesTableTextBlock
Namespace Prefix: | glw_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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