Customer Deposits	6 Months Ended
Jun. 30, 2011
Customer Deposits
Customer Deposits	12. Customer Deposits In 2005 and 2004, several of Corning's customers entered into long-term purchase and supply agreements in which Corning's Display Technologies segment would supply large-size glass substrates to these customers over periods of up to six years. As part of the agreements, these customers agreed to advance cash deposits to Corning for a portion of the contracted glass to be purchased. Between 2004 and 2007, we received a total of $937 million for customer deposit agreements. We do not expect to receive additional deposits related to these agreements. Upon receipt of the cash deposits made by customers, we recorded a customer deposit liability. This liability is reduced at the time of future product sales over the life of the agreements. As product is shipped to a customer, Corning recognizes revenue at the selling price and issues credit memoranda for an agreed amount of the customer deposit liability. The credit memoranda are applied against customer receivables resulting from the sale of product, thus reducing operating cash flows in later periods as these credits are applied for cash deposits received in earlier periods. During the three and six months ended June 30, 2011, we issued $7 million and $14 million, respectively, in credit memoranda. During the three and six months ended June 30, 2010, we issued $38 million and $68 million, respectively, in credit memoranda. Customer deposit liabilities were $14 million and $27 million at June 30, 2011 and December 31, 2010, respectively, which are recorded in the current portion of other accrued liabilities in our consolidated balance sheets. Because these liabilities are denominated in Japanese yen, changes in the balances include the impact of movements in the Japanese yen-U.S. dollar exchange rate. In the event customers do not purchase the agreed upon quantities of product, subject to specific conditions outlined in the agreements, Corning may retain certain amounts of the customer deposits. If Corning does not deliver agreed upon product quantities, subject to specific conditions outlined in the agreements, Corning may be required to return certain amounts of customer deposits.

12. Customer Deposits

In 2005 and 2004, several of Corning's customers entered into long-term purchase and supply agreements in which Corning's Display Technologies segment would supply large-size glass substrates to these customers over periods of up to six years. As part of the agreements, these customers agreed to advance cash deposits to Corning for a portion of the contracted glass to be purchased. Between 2004 and 2007, we received a total of $937 million for customer deposit agreements. We do not expect to receive additional deposits related to these agreements.

Upon receipt of the cash deposits made by customers, we recorded a customer deposit liability. This liability is reduced at the time of future product sales over the life of the agreements. As product is shipped to a customer, Corning recognizes revenue at the selling price and issues credit memoranda for an agreed amount of the customer deposit liability. The credit memoranda are applied against customer receivables resulting from the sale of product, thus reducing operating cash flows in later periods as these credits are applied for cash deposits received in earlier periods.

During the three and six months ended June 30, 2011, we issued $7 million and $14 million, respectively, in credit memoranda. During the three and six months ended June 30, 2010, we issued $38 million and $68 million, respectively, in credit memoranda. Customer deposit liabilities were $14 million and $27 million at June 30, 2011 and December 31, 2010, respectively, which are recorded in the current portion of other accrued liabilities in our consolidated balance sheets. Because these liabilities are denominated in Japanese yen, changes in the balances include the impact of movements in the Japanese yen-U.S. dollar exchange rate.

In the event customers do not purchase the agreed upon quantities of product, subject to specific conditions outlined in the agreements, Corning may retain certain amounts of the customer deposits. If Corning does not deliver agreed upon product quantities, subject to specific conditions outlined in the agreements, Corning may be required to return certain amounts of customer deposits.