v3.25.4

Income Taxes - Schedule of Deferred Tax Valuation Allowances (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Deferred Tax Assets, Valuation Allowance [Roll Forward]
Balance as of January 1	$ 173	$ 207	$ 166
Additions	6,047	26	66
Reductions	(18)	(60)	(25)
Balance as of December 31	$ 6,202	$ 173	$ 207

X

- Definition

Amount of additions to deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

No definition available.

+ Details

Name:	glw_DeferredTaxAssetsValuationAllowanceAdditions
Namespace Prefix:	glw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents reduction of valuation allowance for deferred tax assets.

+ References

No definition available.

+ Details

Name:	glw_DeferredTaxAssetsValuationAllowanceReduction
Namespace Prefix:	glw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Deferred Tax Assets, Valuation Allowance

+ References

No definition available.

+ Details

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

X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

Name:	us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant