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Leases (Tables)
12 Months Ended
Dec. 31, 2011
Leases [Abstract]  
Rent Expense for Operating Leases

Rent expense for operating leases was as follows:

   2011  2010  2009
          
PPL $109 $90 $86
PPL Energy Supply  84  87  86
Future Minimum Rental Payments for All Operating Leases
Total future minimum rental payments for all operating leases are estimated to be:
                
    PPL      
  PPL Energy Supply LKE LG&E KU
                
2012 $ 125 $ 104 $ 15 $ 5 $ 9
2013   127   109   13   5   7
2014   123   109   11   4   6
2015   105   96   8   3   5
2016   57   53   3   1   2
Thereafter   252   238   6   1   4
Total  $ 789 $ 709 $ 56 $ 19 $ 33