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Goodwill And Other Intangible Assets
12 Months Ended
Dec. 31, 2011
Goodwill And Other Intangible Assets [Abstract]  
Goodwill And Other Intangible Assets
10.      Goodwill and Other Intangible Assets


Corning's gross goodwill balance for the fiscal years ended December 31, 2011 and 2010 were $7.1 billion and 7.0 billion, respectively.  Accumulated impairment losses were $6.5 billion for the fiscal years ended December 31, 2011 and 2010, and were generated entirely through goodwill impairments related to the Telecommunications segment.


Amortized intangible assets are primarily related to the Telecommunications and Life Sciences segments.  Amortization expense related to these intangible assets was $15 million, $8 million and $10 million for the years ended December 31, 2011, 2010 and 2009, respectively.  Amortization expense is estimated to be approximately $16 million for 2012, and $16 million thereafter.