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Segment and Related Information (Tables)
3 Months Ended
Mar. 31, 2014
Segment and Related Information [Abstract]  
Segment and Related Information

Financial data for the segments and reconciliation to PPL's consolidated results for the periods ended March 31 are:

            Three Months
      2014 2013
Income Statement Data            
Revenues from external customers            
 U.K. Regulated       $ 648 $ 648
 Kentucky Regulated         934   800
 Pennsylvania Regulated         591   512
 Supply (a)         (953)   494
 Corporate and Other         3   3
Total       $ 1,223 $ 2,457
                 
Intersegment electric revenues            
 Supply       $ 27 $ 14
                 
Net Income Attributable to PPL Shareowners            
 U.K. Regulated       $ 206 $ 313
 Kentucky Regulated         107   85
 Pennsylvania Regulated         85   64
 Supply (a)         (75)   (46)
 Corporate and Other         (7)   (3)
Total       $ 316 $ 413

   March 31, December 31,
   2014 2013
Balance Sheet Data      
Assets      
 U.K. Regulated $ 16,535 $ 15,895
 Kentucky Regulated   12,037   12,016
 Pennsylvania Regulated   7,022   6,846
 Supply   12,237   11,408
 Corporate and Other (b)   142   94
Total assets $ 47,973 $ 46,259

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

(b)       Primarily consists of unallocated items, including cash, PP&E and the elimination of inter-segment transactions.