Significant Customers (Details)			3 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2011 Sharp Electronics Corporation [Member] Display Technologies [Member] customer
Significant Customer [Line Items]
Number of significant customers			1
Percentage of consolidated net sales	10.00%	10.00%

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