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Investments (Equity Method Investments) (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2011
Dec. 31, 2010
Schedule of Investments [Line Items]  
Equity method investments$ 4,887$ 4,369
Other investments33
Total4,8904,372
Samsung Corning Precision Materials Co., Ltd. [Member]
  
Schedule of Investments [Line Items]  
Ownership interest percentage, maximum50.00%[1] 
Equity method investments3,3922,943
Dow Corning Corporation [Member]
  
Schedule of Investments [Line Items]  
Ownership interest percentage, maximum50.00%[1] 
Equity method investments1,2501,186
All Other [Member]
  
Schedule of Investments [Line Items]  
Ownership interest percentage, minimum20.00%[1] 
Ownership interest percentage, maximum50.00% 
Equity method investments$ 245$ 240
[1]Amounts reflect Corning's direct ownership interests in the respective affiliated companies. Corning does not control any of these entities.