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Investments (Equity Method Investments) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Samsung Corning Precision Materials Co., Ltd. [Member]
Dec. 31, 2011
Samsung Corning Precision Materials Co., Ltd. [Member]
Dec. 31, 2012
Dow Corning Corporation [Member]
Dec. 31, 2011
Dow Corning Corporation [Member]
Dec. 31, 2012
All Other [Member]
Dec. 31, 2011
All Other [Member]
Dec. 31, 2012
Corning Inc. [Member]
Samsung Corning Precision Materials Co., Ltd. [Member]
Dec. 31, 2007
Corning Inc. [Member]
Samsung Corning Precision Materials Co., Ltd. [Member]
Dec. 31, 2012
Corning Inc. [Member]
Dow Corning Corporation [Member]
Schedule of Investments [Line Items]                      
Ownership interest percentage     50.00% [1]   50.00% [1]       50.00% 50.00% 50.00%
Ownership interest percentage, minimum             20.00% [1]        
Ownership interest percentage, maximum             50.00% [1]        
Equity method investments $ 4,912 $ 4,723 $ 3,346 $ 3,315 $ 1,191 $ 1,160 $ 375 $ 248      
Other investments 3 3                  
Total $ 4,915 $ 4,726                  
[1] Amounts reflect Corning's direct ownership interests in the respective affiliated companies. Corning does not control any of such entities.