Debt	9 Months Ended
Sep. 30, 2012
Debt [Abstract]
Debt	3. Debt Based on borrowing rates currently available to us for loans with similar terms and maturities, the fair value of long-term debt was $3.7 billion at September 30, 2012 and $2.6 billion at December 31, 2011. 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. 2012 In the first quarter of 2012, we issued $250 million of 4.70% senior unsecured notes and $500 million of 4.75% senior unsecured notes for net proceeds of approximately $247 million and $495 million, respectively. The 4.70% notes mature on March 15, 2037 and the 4.75% notes mature on March 15, 2042. In 2012, Corning borrowed approximately $288 million from the credit facility that a wholly-owned subsidiary entered into in the second quarter of 2011. 2011 In the third quarter of 2011, Corning borrowed approximately $34 million on the credit facility that a wholly-owned subsidiary entered into in the second quarter of 2011. In the second quarter of 2011, a wholly-owned subsidiary entered into a credit facility that allows Corning to borrow up to Chinese Renminbi (RMB) 4.0 billion, or approximately $636 million when translated to United States dollars. Corning may request advances during the eighteen month period beginning on June 30, 2011 (the "Availability Period"). Corning will repay the aggregate principal amount and accrued interest outstanding at the end of the Availability Period in six installments, with the final payment due in August, 2016, which is five years from the date of the first advance.

Debt

9 Months Ended

Sep. 30, 2012

3. Debt

Based on borrowing rates currently available to us for loans with similar terms and maturities, the fair value of long-term debt was $3.7 billion at September 30, 2012 and $2.6 billion at December 31, 2011. 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.

2012

In the first quarter of 2012, we issued $250 million of 4.70% senior unsecured notes and $500 million of 4.75% senior unsecured notes for net proceeds of approximately $247 million and $495 million, respectively. The 4.70% notes mature on March 15, 2037 and the 4.75% notes mature on March 15, 2042.

In 2012, Corning borrowed approximately $288 million from the credit facility that a wholly-owned subsidiary entered into in the second quarter of 2011.

2011

In the third quarter of 2011, Corning borrowed approximately $34 million on the credit facility that a wholly-owned subsidiary entered into in the second quarter of 2011.

In the second quarter of 2011, a wholly-owned subsidiary entered into a credit facility that allows Corning to borrow up to Chinese Renminbi (RMB) 4.0 billion, or approximately $636 million when translated to United States dollars. Corning may request advances during the eighteen month period beginning on June 30, 2011 (the "Availability Period"). Corning will repay the aggregate principal amount and accrued interest outstanding at the end of the Availability Period in six installments, with the final payment due in August, 2016, which is five years from the date of the first advance.