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Other Income (Expense) - net (Tables)
 12 Months Ended
Dec. 31, 2011
Other Income (Expense) Net [Abstract]  
Other Income (Expense) - net
17. Other Income (Expense) - net
                              
(PPL, PPL Energy Supply, PPL Electric, LKE, LG&E and KU)
                              
The breakdown of "Other Income (Expense) - net" was:
                              
    PPL PPL Energy Supply PPL Electric
    2011 2010 2009 2011 2010 2009 2011 2010 2009
Other Income                           
 Gains related to the                           
  extinguishment of notes (a)       $ 29       $ 25         
 Earnings on securities in NDT funds $ 24 $ 20   20 $ 24 $ 20   20         
 Interest income   7   8   14   1   4   5 $ 1 $ 2 $ 8
 AFUDC   7   5   1            7   5   1
 Net hedge gains associated with the                           
  2011 Bridge Facility (b)   55                        
 Gain on redemption of debt (c)   22                        
 Miscellaneous - Domestic   11   5   9   6   4   3      1   
 Miscellaneous - International   1   1   1                  
 Total Other Income   127   39   74   31   28   53   8   8   9
Other Expense                           
 Economic foreign currency                            
  exchange contracts   (10)   (3)   9                  
 Charitable contributions   9   4   6   3   1      2   1   2
 Cash flow hedges (d)      29                     
 LKE other acquisition-related                            
  costs (Note ##AcqEON)      31                     
 WPD Midlands other acquisition-                           
  related costs (Note ##AcqEON)   34                        
 Foreign currency loss on 2011 Bridge                           
  Facility (e)   57                        
 U.K. stamp duty tax   21                        
 Miscellaneous - Domestic   9   7   8   5   5   9   1   2   1
 Miscellaneous - International   3   2   4                  
 Total Other Expense   123   70   27   8   6   9   3   3   3
Other Income (Expense) - net $ 4 $ (31) $ 47 $ 23 $ 22 $ 44 $ 5 $ 5 $ 6

(a)       Represents PPL Energy Supply's $25 million gain on its tender offers to purchase up to $250 million aggregate principal amount of certain of its outstanding senior notes and PPL's additional net gain of $4 million as a result of reclassifying net gains on related cash flow hedges from AOCI into earnings.

(b)       Represents a gain on foreign currency contracts that hedged the repayment of the 2011 Bridge Facility borrowing.

(c)       As a result of PPL Electrics redemption of 7.125% Senior Secured Bonds due 2013, PPL recorded a gain on the accelerated amortization of the fair value adjustment to the debt recorded in connection with previously settled fair value hedges.

(d)       Represents losses reclassified from AOCI into earnings associated with discontinued hedges at PPL for debt that had been planned to be issued by PPL Energy Supply. As a result of the expected net proceeds from the sale of certain non-core generation facilities, coupled with the monetization of full-requirement sales contracts, the debt issuance was no longer needed.

(e)       Represents a foreign currency loss related to the repayment of the 2011 Bridge Facility borrowing.