The amount of accumulated foreign unremitted earnings expected to remain invested indefinitely.

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- Definition

Additional capacity of investment.

+ Details

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- Definition

Increase in effective tax rate due to discrete items

+ Details

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Balance Type:	na
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- Definition

Charge from reversal of deferred tax asset regarding subsidy for certain retiree medical benefits

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

The amount of foreign earnings repatriated in the period.

+ Details

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Namespace Prefix:	glw
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- Definition

Capital investment including planned capacity expansion to meet expected demand for company business.

+ Details

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- Definition

Non-liquid operating assets or short term liquidity required to meet current international working capital needs, and joint venture unremitted earnings that requires a joint determination with partners to remove any indefinitely reinvested representation.

+ Details

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- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 47

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Subparagraph 2
-Article 4

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate shall be the regular tax rate if there are alternative tax systems.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 47

+ Details

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- Definition

The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to income that is exempt from income tax because of tax holidays an entity has received. A tax "holiday" refers to the tax benefit derived from a jurisdiction that provides an exemption from income taxes for some defined period of time as an incentive to attract business.

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- Definition

The sum of the current income tax expense (benefit) and the deferred income tax expense (benefit) pertaining to pretax income (loss) from continuing operations; income tax expense (benefit) may include interest and penalties on tax uncertainties based on the entity's accounting policy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 15, 16, 19

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 45, 46

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Income Taxes (Details) (USD $)	3 Months Ended				6 Months Ended		12 Months Ended
Income Taxes (Details) (USD $)	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010	Mar. 31, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010	Sep. 30, 2010
Provision for income taxes	$ (123,000,000)		$ (31,000,000)	$ 265,000,000	$ (237,000,000)	$ (128,000,000)
Effective tax rate	14.00%		3.30%		13.60%	6.90%
Statutory U.S. income tax (benefit) rate	35.00%		35.00%
Charge from reversal of deferred tax asset regarding subsidy for certain retiree medical benefits						56,000,000
Effective income tax rate reconciliation increase from discrete items						3.90%
Foreign earnings repatriated		1,100,000,000
Accumulated foreign unremitted earnings							8,900,000,000
Tax holiday impact	1.30%		6.30%		1.40%	5.50%
Content of Unremitted foreign earnings							70.00%
Additional capacity of investment								800,000,000
Maximum [Member]
Multi-year international capital investment plan					2,700,000,000
Minimum [Member]
Multi-year international capital investment plan					$ 2,400,000,000