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Goodwill and Other Intangible Assets
3 Months Ended
Mar. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets

There were no changes in the carrying amount of goodwill in the three months ended March 31, 2013.

The Company’s intangible amortization expense for the three months ended March 31, 2013 and 2012 was approximately $10 million and $11 million, respectively.