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Goodwill, Intangible Assets And Impairments (Tables)
9 Months Ended
Sep. 30, 2011
Goodwill, Intangible Assets And Impairments 
Goodwill By Reportable Operating Segment
     USFE&G      Commercial Power     International     Total  
     (in millions)  

Duke Energy

         

Balance at December 31, 2010:

         

Goodwill

   $ 3,483       $ 940      $ 306      $ 4,729   

Accumulated Impairment Charges

     —           (871     —          (871
  

 

 

    

 

 

   

 

 

   

 

 

 

Balance at December 31, 2010, as adjusted for accumulated impairment charges

     3,483         69        306        3,858   

Foreign Exchange and Other Changes

     —           —          (11     (11
  

 

 

    

 

 

   

 

 

   

 

 

 

Balance as of September 30, 2011:

         

Goodwill

     3,483         940        295        4,718   

Accumulated Impairment Charges

     —           (871     —          (871
  

 

 

    

 

 

   

 

 

   

 

 

 

Balance at September 30, 2011, as adjusted for accumulated impairment charges, foreign exchange and other charges

   $ 3,483       $ 69      $ 295      $ 3,847