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Segment and Related Information (Tables)
6 Months Ended
Jun. 30, 2012
Segment and Related Information [Abstract]  
Segment and Related Information

Financial data for the segments for the periods ended June 30 are:

      Three Months Six Months
  2012 2011 2012 2011
Income Statement Data            
Revenues from external customers            
 Kentucky Regulated $ 658 $ 638 $ 1,363 $ 1,404
 U.K. Regulated   557   420   1,119   645
 Pennsylvania Regulated   403   436   860   990
 Supply (a)   931   995   3,319   2,360
Total $ 2,549 $ 2,489 $ 6,661 $ 5,399
                 
Intersegment electric revenues            
 Pennsylvania Regulated $ 1 $ 4 $ 2 $ 8
 Supply   17   4   38   10
                 
Net Income Attributable to PPL            
 Kentucky Regulated $ 34 $ 31 $ 76 $ 106
 U.K. Regulated   196   38   361   93
 Pennsylvania Regulated   29   36   62   88
 Supply (a)   12   91   313   310
Total $ 271 $ 196 $ 812 $ 597

   June 30, December 31,
   2012 2011
Balance Sheet Data      
Assets      
 Kentucky Regulated $ 10,288 $ 10,229
 U.K. Regulated   13,445   13,364
 Pennsylvania Regulated   5,532   5,610
 Supply   14,243   13,445
Total assets $ 43,508 $ 42,648

(a)       Includes unrealized gains and losses from economic activity. See Note 14 for additional information.