Note 4 - Debt	3 Months Ended
Note 4 - Debt	Mar. 31, 2014
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	4. Debt Based on borrowing rates currently available to us for loans with similar terms and maturities, the fair value of long-term debt was $3.5 billion at March 31, 2014 and December 31, 2013, compared to recorded book values of $3.2 billion at March 31, 2014 and $3.3 billion at December 31, 2013. The Company measures the fair value of its long-term debt using Level 2 inputs based primarily on current market yields for its existing debt traded in the secondary market. 2014 At March 31, 2014, Corning had $418 million in outstanding commercial paper as part of the Company’s commercial paper program established in the second quarter of 2013. The estimated fair value of this commercial paper approximates its carrying value due to the short-term maturities. 2013 In the first quarter of 2013, we amended and restated our existing revolving credit facility. The amended facility provides a $1.0 billion unsecured multi-currency line of credit that expires in March 2018. The facility includes a leverage test (debt to capital ratio) financial covenant. As of March 31, 2014, we were in compliance with this covenant. In the first quarter of 2013, Corning repaid the aggregate principal amount and accrued interest outstanding on the credit facility entered into in the second quarter of 2011 that allowed Corning to borrow up to Chinese Renminbi (RMB) 4.0 billion. The total amount repaid was approximately $500 million. Upon repayment, this facility was terminated.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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