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Goodwill (Tables)
3 Months Ended
Mar. 31, 2012
Goodwill [Abstract]  
Goodwill Rollforward
15. Goodwill       
               
(PPL)           
               
The changes in the carrying amounts of goodwill by segment were:
              
    Kentucky Regulated U.K. Regulated Supply Total
PPL           
Balance at December 31, 2011 (a)$ 662 $ 3,032 $ 420 $ 4,114
 Effect of foreign currency exchange rates     47      47
Balance at March 31, 2012 (a)$ 662 $ 3,079 $ 420 $ 4,161
               

(a)       There were no accumulated impairment losses related to goodwill.