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

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

      Three Months Nine Months
  2012 2011 2012 2011
Income Statement Data            
Revenues from external customers            
 Kentucky Regulated $ 732 $ 736 $ 2,095 $ 2,140
 U.K. Regulated   528   493   1,647   1,138
 Pennsylvania Regulated   443   454   1,303   1,444
 Supply (a)   700   1,437   4,019   3,797
Total $ 2,403 $ 3,120 $ 9,064 $ 8,519
                 
Intersegment electric revenues            
 Pennsylvania Regulated $ 1 $ 1 $ 3 $ 9
 Supply   23   5   61   15
                 
Net Income Attributable to PPL Shareowners            
 Kentucky Regulated $ 72 $ 78 $ 148 $ 184
 U.K. Regulated   202   138   563   231
 Pennsylvania Regulated   33   28   95   116
 Supply (a)   48   200   361   510
Total $ 355 $ 444 $ 1,167 $ 1,041

   September 30, December 31,
   2012 2011
Balance Sheet Data      
Assets      
 Kentucky Regulated $ 10,546 $ 10,229
 U.K. Regulated   14,015   13,364
 Pennsylvania Regulated   5,823   5,610
 Supply   12,856   13,445
Total assets $ 43,240 $ 42,648

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