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Segment and Related Information (Tables)
3 Months Ended
Mar. 31, 2012
Segment and Related Information [Abstract]  
Segment and Related Information

Financial data for the segments are:

  Three Months Ended March 31,
 2012 2011
Income Statement Data     
Revenues from external customers     
 Kentucky Regulated$ 705 $ 766
 U.K. Regulated  562   225
 Pennsylvania Regulated  457   554
 Supply (a)  2,388   1,365
Total$ 4,112 $ 2,910
       
Intersegment electric revenues     
 Pennsylvania Regulated$ 1 $ 4
 Supply  21   6
       
Net Income Attributable to PPL     
 Kentucky Regulated$ 42 $ 75
 U.K. Regulated  165   55
 Pennsylvania Regulated  33   52
 Supply (a)  301   219
Total$ 541 $ 401

  March 31, December 31,
  2012 2011
Balance Sheet Data     
Total Assets     
 Kentucky Regulated (b)$ 10,225 $ 10,229
 U.K. Regulated  13,779   13,364
 Pennsylvania Regulated  5,600   5,610
 Supply (b)  14,478   13,445
Total$ 44,082 $ 42,648

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

(b)       A portion of the goodwill related to the 2010 LKE acquisition has been attributed to PPL's supply segment.