Note 18 - Significant Customers (Details)	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Significant Customers [Abstract]
Number of Significant Customers	1	1	1	0

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