Note 17 - Significant Customers (Details)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Significant Customers [Abstract]
Number of Significant Customers	1glw_NumberOfSignificantCustomers	1glw_NumberOfSignificantCustomers

Number of Significant Customers that are equal to or greater than 10% of the Company's consolidated total sales.

No definition available.

Name:	glw_NumberOfSignificantCustomers
Namespace Prefix:	glw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration