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Asset Retirement Obligations
9 Months Ended
Sep. 30, 2011
PPL [Member]
 
Asset Retirement Obligations [Line Items] 
Asset Retirement Obligations
16. Asset Retirement Obligations               
                  
(PPL, LKE, LG&E and KU)             
                  
Accretion expense recorded by LG&E and KU is offset with a regulatory credit and related regulatory asset, such that there
is no income statement impact. 
                  
(PPL, PPL Energy Supply, LKE, LG&E and KU)             
                  
The changes in the carrying amounts of AROs were as follows.         
                  
       PPL         
    PPL Energy Supply LKE LG&E KU
                  
ARO at December 31, 2010 $ 448 $ 345 $ 103 $ 49 $ 54
 Accretion expense   25   20   4   2   2
 Obligations assumed in acquisition of WPD               
  Midlands (a)   15            
 Derecognition (b)      (5)         
 Obligations incurred   11   11         
 Changes in estimated cash flow or settlement date   3   (4)   7   4   3
 Obligations settled   (13)   (13)         
ARO at September 30, 2011 $ 489 $ 354 $ 114 $ 55 $ 59

(a)       Obligations required under U.K. law related to treated wood poles, gas-filled switchgear and fluid-filled cables. See Note 8 for additional information on the acquisition.

(b)       Represents AROs derecognized as a result of PPL Energy Supply's distribution of its membership interest in PPL Global to PPL Energy Supply's parent, PPL Energy Funding. See Note 8 for additional information on the distribution.

The classification of AROs on the Balance Sheet was as follows.
                 
   September 30, 2011
      PPL Energy         
   PPL Supply LKE LG&E KU
                 
Current portion (a) $ 10 $ 9 $ 1 $ 1   
Long-term portion (b)   479   345   113   54 $ 59
 Total $ 489 $ 354 $ 114 $ 55 $ 59
                 
                 
   December 31, 2010
      PPL Energy         
   PPL Supply LKE LG&E KU
                 
Current portion (a) $ 13 $ 13         
Long-term portion (b)   435   332 $ 103 $ 49 $ 54
 Total $ 448 $ 345 $ 103 $ 49 $ 54

(a)       Included in "Other current liabilities."

(b)       Included in "Asset retirement obligations."

 

(PPL and PPL Energy Supply)

 

The most significant ARO recorded by PPL and PPL Energy Supply relates to the decommissioning of the Susquehanna nuclear plant. The accrued nuclear decommissioning obligation was $287 million and $270 million at September 30, 2011 and December 31, 2010, and is included in "Asset retirement obligations" on the Balance Sheets.

 

Assets in the NDT funds are legally restricted for purposes of settling PPL's and PPL Energy Supply's ARO related to the decommissioning of the Susquehanna nuclear plant. The aggregate fair value of these assets was $594 million and $618 million at September 30, 2011 and December 31, 2010, and is included in "Nuclear plant decommissioning trust funds" on the Balance Sheets. See Notes 13 and 17 for additional information on these assets.

PPL Energy Supply [Member]
 
Asset Retirement Obligations [Line Items] 
Asset Retirement Obligations
16. Asset Retirement Obligations               
                  
(PPL, LKE, LG&E and KU)             
                  
Accretion expense recorded by LG&E and KU is offset with a regulatory credit and related regulatory asset, such that there
is no income statement impact. 
                  
(PPL, PPL Energy Supply, LKE, LG&E and KU)             
                  
The changes in the carrying amounts of AROs were as follows.         
                  
       PPL         
    PPL Energy Supply LKE LG&E KU
                  
ARO at December 31, 2010 $ 448 $ 345 $ 103 $ 49 $ 54
 Accretion expense   25   20   4   2   2
 Obligations assumed in acquisition of WPD               
  Midlands (a)   15            
 Derecognition (b)      (5)         
 Obligations incurred   11   11         
 Changes in estimated cash flow or settlement date   3   (4)   7   4   3
 Obligations settled   (13)   (13)         
ARO at September 30, 2011 $ 489 $ 354 $ 114 $ 55 $ 59

(a)       Obligations required under U.K. law related to treated wood poles, gas-filled switchgear and fluid-filled cables. See Note 8 for additional information on the acquisition.

(b)       Represents AROs derecognized as a result of PPL Energy Supply's distribution of its membership interest in PPL Global to PPL Energy Supply's parent, PPL Energy Funding. See Note 8 for additional information on the distribution.

The classification of AROs on the Balance Sheet was as follows.
                 
   September 30, 2011
      PPL Energy         
   PPL Supply LKE LG&E KU
                 
Current portion (a) $ 10 $ 9 $ 1 $ 1   
Long-term portion (b)   479   345   113   54 $ 59
 Total $ 489 $ 354 $ 114 $ 55 $ 59
                 
                 
   December 31, 2010
      PPL Energy         
   PPL Supply LKE LG&E KU
                 
Current portion (a) $ 13 $ 13         
Long-term portion (b)   435   332 $ 103 $ 49 $ 54
 Total $ 448 $ 345 $ 103 $ 49 $ 54

(a)       Included in "Other current liabilities."

(b)       Included in "Asset retirement obligations."

 

(PPL and PPL Energy Supply)

 

The most significant ARO recorded by PPL and PPL Energy Supply relates to the decommissioning of the Susquehanna nuclear plant. The accrued nuclear decommissioning obligation was $287 million and $270 million at September 30, 2011 and December 31, 2010, and is included in "Asset retirement obligations" on the Balance Sheets.

 

Assets in the NDT funds are legally restricted for purposes of settling PPL's and PPL Energy Supply's ARO related to the decommissioning of the Susquehanna nuclear plant. The aggregate fair value of these assets was $594 million and $618 million at September 30, 2011 and December 31, 2010, and is included in "Nuclear plant decommissioning trust funds" on the Balance Sheets. See Notes 13 and 17 for additional information on these assets.

LKE [Member]
 
Asset Retirement Obligations [Line Items] 
Asset Retirement Obligations
16. Asset Retirement Obligations               
                  
(PPL, LKE, LG&E and KU)             
                  
Accretion expense recorded by LG&E and KU is offset with a regulatory credit and related regulatory asset, such that there
is no income statement impact. 
                  
(PPL, PPL Energy Supply, LKE, LG&E and KU)             
                  
The changes in the carrying amounts of AROs were as follows.         
                  
       PPL         
    PPL Energy Supply LKE LG&E KU
                  
ARO at December 31, 2010 $ 448 $ 345 $ 103 $ 49 $ 54
 Accretion expense   25   20   4   2   2
 Obligations assumed in acquisition of WPD               
  Midlands (a)   15            
 Derecognition (b)      (5)         
 Obligations incurred   11   11         
 Changes in estimated cash flow or settlement date   3   (4)   7   4   3
 Obligations settled   (13)   (13)         
ARO at September 30, 2011 $ 489 $ 354 $ 114 $ 55 $ 59

(a)       Obligations required under U.K. law related to treated wood poles, gas-filled switchgear and fluid-filled cables. See Note 8 for additional information on the acquisition.

(b)       Represents AROs derecognized as a result of PPL Energy Supply's distribution of its membership interest in PPL Global to PPL Energy Supply's parent, PPL Energy Funding. See Note 8 for additional information on the distribution.

The classification of AROs on the Balance Sheet was as follows.
                 
   September 30, 2011
      PPL Energy         
   PPL Supply LKE LG&E KU
                 
Current portion (a) $ 10 $ 9 $ 1 $ 1   
Long-term portion (b)   479   345   113   54 $ 59
 Total $ 489 $ 354 $ 114 $ 55 $ 59
                 
                 
   December 31, 2010
      PPL Energy         
   PPL Supply LKE LG&E KU
                 
Current portion (a) $ 13 $ 13         
Long-term portion (b)   435   332 $ 103 $ 49 $ 54
 Total $ 448 $ 345 $ 103 $ 49 $ 54

(a)       Included in "Other current liabilities."

(b)       Included in "Asset retirement obligations."

 

(PPL and PPL Energy Supply)

 

The most significant ARO recorded by PPL and PPL Energy Supply relates to the decommissioning of the Susquehanna nuclear plant. The accrued nuclear decommissioning obligation was $287 million and $270 million at September 30, 2011 and December 31, 2010, and is included in "Asset retirement obligations" on the Balance Sheets.

 

Assets in the NDT funds are legally restricted for purposes of settling PPL's and PPL Energy Supply's ARO related to the decommissioning of the Susquehanna nuclear plant. The aggregate fair value of these assets was $594 million and $618 million at September 30, 2011 and December 31, 2010, and is included in "Nuclear plant decommissioning trust funds" on the Balance Sheets. See Notes 13 and 17 for additional information on these assets.

LGE [Member]
 
Asset Retirement Obligations [Line Items] 
Asset Retirement Obligations
16. Asset Retirement Obligations               
                  
(PPL, LKE, LG&E and KU)             
                  
Accretion expense recorded by LG&E and KU is offset with a regulatory credit and related regulatory asset, such that there
is no income statement impact. 
                  
(PPL, PPL Energy Supply, LKE, LG&E and KU)             
                  
The changes in the carrying amounts of AROs were as follows.         
                  
       PPL         
    PPL Energy Supply LKE LG&E KU
                  
ARO at December 31, 2010 $ 448 $ 345 $ 103 $ 49 $ 54
 Accretion expense   25   20   4   2   2
 Obligations assumed in acquisition of WPD               
  Midlands (a)   15            
 Derecognition (b)      (5)         
 Obligations incurred   11   11         
 Changes in estimated cash flow or settlement date   3   (4)   7   4   3
 Obligations settled   (13)   (13)         
ARO at September 30, 2011 $ 489 $ 354 $ 114 $ 55 $ 59

(a)       Obligations required under U.K. law related to treated wood poles, gas-filled switchgear and fluid-filled cables. See Note 8 for additional information on the acquisition.

(b)       Represents AROs derecognized as a result of PPL Energy Supply's distribution of its membership interest in PPL Global to PPL Energy Supply's parent, PPL Energy Funding. See Note 8 for additional information on the distribution.

The classification of AROs on the Balance Sheet was as follows.
                 
   September 30, 2011
      PPL Energy         
   PPL Supply LKE LG&E KU
                 
Current portion (a) $ 10 $ 9 $ 1 $ 1   
Long-term portion (b)   479   345   113   54 $ 59
 Total $ 489 $ 354 $ 114 $ 55 $ 59
                 
                 
   December 31, 2010
      PPL Energy         
   PPL Supply LKE LG&E KU
                 
Current portion (a) $ 13 $ 13         
Long-term portion (b)   435   332 $ 103 $ 49 $ 54
 Total $ 448 $ 345 $ 103 $ 49 $ 54

(a)       Included in "Other current liabilities."

(b)       Included in "Asset retirement obligations."

 

(PPL and PPL Energy Supply)

 

The most significant ARO recorded by PPL and PPL Energy Supply relates to the decommissioning of the Susquehanna nuclear plant. The accrued nuclear decommissioning obligation was $287 million and $270 million at September 30, 2011 and December 31, 2010, and is included in "Asset retirement obligations" on the Balance Sheets.

 

Assets in the NDT funds are legally restricted for purposes of settling PPL's and PPL Energy Supply's ARO related to the decommissioning of the Susquehanna nuclear plant. The aggregate fair value of these assets was $594 million and $618 million at September 30, 2011 and December 31, 2010, and is included in "Nuclear plant decommissioning trust funds" on the Balance Sheets. See Notes 13 and 17 for additional information on these assets.

KU [Member]
 
Asset Retirement Obligations [Line Items] 
Asset Retirement Obligations
16. Asset Retirement Obligations               
                  
(PPL, LKE, LG&E and KU)             
                  
Accretion expense recorded by LG&E and KU is offset with a regulatory credit and related regulatory asset, such that there
is no income statement impact. 
                  
(PPL, PPL Energy Supply, LKE, LG&E and KU)             
                  
The changes in the carrying amounts of AROs were as follows.         
                  
       PPL         
    PPL Energy Supply LKE LG&E KU
                  
ARO at December 31, 2010 $ 448 $ 345 $ 103 $ 49 $ 54
 Accretion expense   25   20   4   2   2
 Obligations assumed in acquisition of WPD               
  Midlands (a)   15            
 Derecognition (b)      (5)         
 Obligations incurred   11   11         
 Changes in estimated cash flow or settlement date   3   (4)   7   4   3
 Obligations settled   (13)   (13)         
ARO at September 30, 2011 $ 489 $ 354 $ 114 $ 55 $ 59

(a)       Obligations required under U.K. law related to treated wood poles, gas-filled switchgear and fluid-filled cables. See Note 8 for additional information on the acquisition.

(b)       Represents AROs derecognized as a result of PPL Energy Supply's distribution of its membership interest in PPL Global to PPL Energy Supply's parent, PPL Energy Funding. See Note 8 for additional information on the distribution.

The classification of AROs on the Balance Sheet was as follows.
                 
   September 30, 2011
      PPL Energy         
   PPL Supply LKE LG&E KU
                 
Current portion (a) $ 10 $ 9 $ 1 $ 1   
Long-term portion (b)   479   345   113   54 $ 59
 Total $ 489 $ 354 $ 114 $ 55 $ 59
                 
                 
   December 31, 2010
      PPL Energy         
   PPL Supply LKE LG&E KU
                 
Current portion (a) $ 13 $ 13         
Long-term portion (b)   435   332 $ 103 $ 49 $ 54
 Total $ 448 $ 345 $ 103 $ 49 $ 54

(a)       Included in "Other current liabilities."

(b)       Included in "Asset retirement obligations."

 

(PPL and PPL Energy Supply)

 

The most significant ARO recorded by PPL and PPL Energy Supply relates to the decommissioning of the Susquehanna nuclear plant. The accrued nuclear decommissioning obligation was $287 million and $270 million at September 30, 2011 and December 31, 2010, and is included in "Asset retirement obligations" on the Balance Sheets.

 

Assets in the NDT funds are legally restricted for purposes of settling PPL's and PPL Energy Supply's ARO related to the decommissioning of the Susquehanna nuclear plant. The aggregate fair value of these assets was $594 million and $618 million at September 30, 2011 and December 31, 2010, and is included in "Nuclear plant decommissioning trust funds" on the Balance Sheets. See Notes 13 and 17 for additional information on these assets.