Other Assets and Other Liabilities (Narrative) (Details) $ in Millions	Dec. 31, 2019 USD ($)
Other Liabilities [Abstract]
Receivable, Current, Disputed Tax Deposit	$ 33

Other Assets and Other Liabilities Disclosure [Abstract]

No definition available.

Name:	glw_OtherAssetsAndOtherLiabilitiesDisclosureAbstract
Namespace Prefix:	glw_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration