Financial Instruments - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Fair Value Disclosures [Abstract]
Accumulated derivative gain (loss)	$ 53	$ 37

AOCI, Accounting Hedges, Cumulative Gain (Loss), After Tax

No definition available.

Name:	glw_AOCIAccountingHedgesCumulativeGainLossAfterTax
Namespace Prefix:	glw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant