Investments (Related Party Information For Investments In Affiliates) (Details) (USD $) In Millions			3 Months Ended	6 Months Ended
Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2011 Affiliated Companies [Member]	Jun. 30, 2010 Affiliated Companies [Member]	Jun. 30, 2011 Affiliated Companies [Member]	Jun. 30, 2010 Affiliated Companies [Member]
Schedule of Investments [Line Items]
Corning sales to affiliated companies			$ 6	$ 6	$ 12	$ 11
Corning purchases from affiliated companies			19	14	56	39
Corning transfers of assets, at cost, to affiliated companies			27	34	61	61
Dividends received from affiliated companies			69	57	389	285
Royalty income from affiliated companies			66	67	127	132
Corning services to affiliates			13	8	21	15
Balances due to affiliated companies	27	7
Balances due from affiliated companies	$ 103	$ 101

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Transfer of assets, at cost, to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.

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Costs associated with revenues arising from an entity that is an affiliate of the reporting entity by means of direct or indirect ownership.

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Revenues arising from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's' management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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