The percent of indemnification of excess liability.

No definition available.

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- Definition

The number of active hazardous waste sites for which the entity is responsible.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
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- Definition

Total costs accrued as of the balance sheet date for environmental loss contingencies.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 25
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859

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Balance Type:	credit
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of loss contingency liability.

+ References

+ Details

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

- Details

Name:	us-gaap_EnvironmentalRemediationContingencyAxis=glw_EnvironmentalCleanupAndRelatedLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=glw_DowCorningCorporationMember
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Data Type:	na
Balance Type:
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- Details

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- Details

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- Details

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Note 11 - Commitments and Contingencies (Details Textual) $ in Millions		9 Months Ended
	May 31, 2016 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2016	Jun. 01, 2016
Environmental Cleanup and Related Litigation [Member]
Number of Hazardous Waste Sites [Member]		15
Accrual for Environmental Loss Contingencies, Ending Balance		$ 60	$ 68
Dow Corning Corporation [Member]
Equity Method Investment, Ownership Percentage				50.00%	50.00%
Indemnification of Excess Liability	50.00%
Asbestos Litigation [Member]
Loss Contingency Accrual, Ending Balance		38	$ 96
Dow Corning Breast Implant Litigation [Member] \| Dow Corning Corporation [Member]
Loss Contingency Accrual, Ending Balance	$ 290	$ 160
Indemnification of Excess Liability		50.00%
Litigation Settlement, Expense		$ 1,800
Dow Corning Bankruptcy Pendency Interest Claims [Member] \| Dow Corning Corporation [Member]
Loss Contingency Accrual, Ending Balance	$ 107
Dow Corning Environmental Claims [Member] \| Dow Corning Corporation [Member]
Indemnification of Excess Liability		50.00%