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Jointly Owned Facilities
 12 Months Ended
Dec. 31, 2012
Jointly Owned Facilities [Line Items]  
Jointly Owned Facilities

14. Jointly Owned Facilities

 

(PPL, PPL Energy Supply, LKE, LG&E and KU)

 

At December 31, 2012 and 2011, the Balance Sheets reflect the owned interests in the facilities listed below.

                Construction
     Ownership    Other Accumulated Work
     Interest Electric Plant Property Depreciation in Progress
PPL               
 December 31, 2012               
 Generating Plants               
  Susquehanna  90.00% $ 4,628    $ 3,530 $ 65
  Conemaugh  16.25%   238      122   30
  Keystone  12.34%   206      82   3
  Trimble County Units 1 & 2  75.00%   1,279      112   43
 Merrill Creek Reservoir  8.37%    $ 22   15   
                  
 December 31, 2011               
 Generating Plants               
  Susquehanna  90.00% $ 4,608    $ 3,496 $ 42
  Conemaugh  16.25%   233      115   14
  Keystone  12.34%   198      69   3
  Trimble County Units 1 & 2  75.00%   1,245      61   35
 Merrill Creek Reservoir  8.37%    $ 22   15   

PPL Energy Supply               
 December 31, 2012               
 Generating Plants               
  Susquehanna  90.00% $ 4,628    $ 3,530 $ 65
  Conemaugh  16.25%   238      122   30
  Keystone  12.34%   206      82   3
 Merrill Creek Reservoir  8.37%    $ 22   15   
                  
 December 31, 2011               
 Generating Plants               
  Susquehanna  90.00% $ 4,608    $ 3,496 $ 42
  Conemaugh  16.25%   233      115   14
  Keystone  12.34%   198      69   3
 Merrill Creek Reservoir  8.37%    $ 22   15   

LKE                
 December 31, 2012               
 Generating Plants               
  Trimble County Unit 1  75.00% $ 304    $ 33 $ 10
  Trimble County Unit 2  75.00%   975      79   33
                  
 December 31, 2011               
 Generating Plants               
  Trimble County Unit 1  75.00% $ 297    $ 19 $ 11
  Trimble County Unit 2  75.00%   948      42   24
                  
LG&E               
 December 31, 2012               
 Generating Plants               
  E.W. Brown Units 6-7  38.00% $ 40    $ 5   
  Paddy's Run Unit 13 & E.W. Brown Unit 5  53.00%   46      3   
  Trimble County Unit 1   75.00%   304      33 $ 10
  Trimble County Unit 2   14.25%   198      14   13
  Trimble County Units 5-6  29.00%   29      2   
  Trimble County Units 7-10  37.00%   68      6   2
  Cane Run Unit 7 CCGT  22.00%            16
                  
 December 31, 2011               
 Generating Plants               
  E.W. Brown Units 6-7  38.00% $ 39    $ 3   
  Paddy's Run Unit 13 & E.W. Brown Unit 5  53.00%   44      2 $ 5
  Trimble County Unit 1   75.00%   297      19   11
  Trimble County Unit 2   14.25%   190      7   7
  Trimble County Units 5-6  29.00%   31      1   
  Trimble County Units 7-10  37.00%   64      4   1
                  
KU                
 December 31, 2012               
 Generating Plants               
  E.W. Brown Units 6-7  62.00% $ 64    $ 7 $ 1
  Paddy's Run Unit 13 & E.W. Brown Unit 5  47.00%   42      2   
  Trimble County Unit 2   60.75%   777      65   20
  Trimble County Units 5-6  71.00%   70      4   
  Trimble County Units 7-10  63.00%   116      10   2
  Cane Run Unit 7 CCGT  78.00%            53
                  
 December 31, 2011               
 Generating Plants               
  E.W. Brown Units 6-7  62.00% $ 64    $ 5   
  Paddy's Run Unit 13 & E.W. Brown Unit 5  47.00%   39      2 $ 4
  Trimble County Unit 2   60.75%   758      35   17
  Trimble County Units 5-6  71.00%   66      2   4
  Trimble County Units 7-10  63.00%   109      6   5

Each subsidiary owning these interests provides its own funding for its share of the facility. Each receives a portion of the total output of the generating plants equal to its percentage ownership. The share of fuel and other operating costs associated with the plants is included in the corresponding operating expenses on the Statements of Income.

 

In addition to the interests mentioned above, at December 31, 2012 and 2011, PPL Montana has a 50% leasehold interest in Colstrip Units 1 and 2 and a 30% leasehold interest in Colstrip Unit 3 under operating leases. See Note 11 for additional information. At December 31, 2012 and 2011, NorthWestern owned a 30% interest in Colstrip Unit 4. PPL Montana and NorthWestern have a sharing agreement that governs each party's responsibilities and rights relating to the operation of Colstrip Units 3 and 4. Under the terms of that agreement, each party is responsible for 15% of the total non-coal operating and construction costs of Colstrip Units 3 and 4, regardless of whether a particular cost is specific to Colstrip Unit 3 or 4, and is entitled to take up to the same percentage of the available generation from Units 3 and 4.

PPL Energy Supply LLC [Member]
  
Jointly Owned Facilities [Line Items]  
Jointly Owned Facilities

14. Jointly Owned Facilities

 

(PPL, PPL Energy Supply, LKE, LG&E and KU)

 

At December 31, 2012 and 2011, the Balance Sheets reflect the owned interests in the facilities listed below.

                Construction
     Ownership    Other Accumulated Work
     Interest Electric Plant Property Depreciation in Progress
PPL               
 December 31, 2012               
 Generating Plants               
  Susquehanna  90.00% $ 4,628    $ 3,530 $ 65
  Conemaugh  16.25%   238      122   30
  Keystone  12.34%   206      82   3
  Trimble County Units 1 & 2  75.00%   1,279      112   43
 Merrill Creek Reservoir  8.37%    $ 22   15   
                  
 December 31, 2011               
 Generating Plants               
  Susquehanna  90.00% $ 4,608    $ 3,496 $ 42
  Conemaugh  16.25%   233      115   14
  Keystone  12.34%   198      69   3
  Trimble County Units 1 & 2  75.00%   1,245      61   35
 Merrill Creek Reservoir  8.37%    $ 22   15   

PPL Energy Supply               
 December 31, 2012               
 Generating Plants               
  Susquehanna  90.00% $ 4,628    $ 3,530 $ 65
  Conemaugh  16.25%   238      122   30
  Keystone  12.34%   206      82   3
 Merrill Creek Reservoir  8.37%    $ 22   15   
                  
 December 31, 2011               
 Generating Plants               
  Susquehanna  90.00% $ 4,608    $ 3,496 $ 42
  Conemaugh  16.25%   233      115   14
  Keystone  12.34%   198      69   3
 Merrill Creek Reservoir  8.37%    $ 22   15   

LKE                
 December 31, 2012               
 Generating Plants               
  Trimble County Unit 1  75.00% $ 304    $ 33 $ 10
  Trimble County Unit 2  75.00%   975      79   33
                  
 December 31, 2011               
 Generating Plants               
  Trimble County Unit 1  75.00% $ 297    $ 19 $ 11
  Trimble County Unit 2  75.00%   948      42   24
                  
LG&E               
 December 31, 2012               
 Generating Plants               
  E.W. Brown Units 6-7  38.00% $ 40    $ 5   
  Paddy's Run Unit 13 & E.W. Brown Unit 5  53.00%   46      3   
  Trimble County Unit 1   75.00%   304      33 $ 10
  Trimble County Unit 2   14.25%   198      14   13
  Trimble County Units 5-6  29.00%   29      2   
  Trimble County Units 7-10  37.00%   68      6   2
  Cane Run Unit 7 CCGT  22.00%            16
                  
 December 31, 2011               
 Generating Plants               
  E.W. Brown Units 6-7  38.00% $ 39    $ 3   
  Paddy's Run Unit 13 & E.W. Brown Unit 5  53.00%   44      2 $ 5
  Trimble County Unit 1   75.00%   297      19   11
  Trimble County Unit 2   14.25%   190      7   7
  Trimble County Units 5-6  29.00%   31      1   
  Trimble County Units 7-10  37.00%   64      4   1
                  
KU                
 December 31, 2012               
 Generating Plants               
  E.W. Brown Units 6-7  62.00% $ 64    $ 7 $ 1
  Paddy's Run Unit 13 & E.W. Brown Unit 5  47.00%   42      2   
  Trimble County Unit 2   60.75%   777      65   20
  Trimble County Units 5-6  71.00%   70      4   
  Trimble County Units 7-10  63.00%   116      10   2
  Cane Run Unit 7 CCGT  78.00%            53
                  
 December 31, 2011               
 Generating Plants               
  E.W. Brown Units 6-7  62.00% $ 64    $ 5   
  Paddy's Run Unit 13 & E.W. Brown Unit 5  47.00%   39      2 $ 4
  Trimble County Unit 2   60.75%   758      35   17
  Trimble County Units 5-6  71.00%   66      2   4
  Trimble County Units 7-10  63.00%   109      6   5

Each subsidiary owning these interests provides its own funding for its share of the facility. Each receives a portion of the total output of the generating plants equal to its percentage ownership. The share of fuel and other operating costs associated with the plants is included in the corresponding operating expenses on the Statements of Income.

 

In addition to the interests mentioned above, at December 31, 2012 and 2011, PPL Montana has a 50% leasehold interest in Colstrip Units 1 and 2 and a 30% leasehold interest in Colstrip Unit 3 under operating leases. See Note 11 for additional information. At December 31, 2012 and 2011, NorthWestern owned a 30% interest in Colstrip Unit 4. PPL Montana and NorthWestern have a sharing agreement that governs each party's responsibilities and rights relating to the operation of Colstrip Units 3 and 4. Under the terms of that agreement, each party is responsible for 15% of the total non-coal operating and construction costs of Colstrip Units 3 and 4, regardless of whether a particular cost is specific to Colstrip Unit 3 or 4, and is entitled to take up to the same percentage of the available generation from Units 3 and 4.

LG And E And KU Energy LLC [Member]
  
Jointly Owned Facilities [Line Items]  
Jointly Owned Facilities

14. Jointly Owned Facilities

 

(PPL, PPL Energy Supply, LKE, LG&E and KU)

 

At December 31, 2012 and 2011, the Balance Sheets reflect the owned interests in the facilities listed below.

                Construction
     Ownership    Other Accumulated Work
     Interest Electric Plant Property Depreciation in Progress
PPL               
 December 31, 2012               
 Generating Plants               
  Susquehanna  90.00% $ 4,628    $ 3,530 $ 65
  Conemaugh  16.25%   238      122   30
  Keystone  12.34%   206      82   3
  Trimble County Units 1 & 2  75.00%   1,279      112   43
 Merrill Creek Reservoir  8.37%    $ 22   15   
                  
 December 31, 2011               
 Generating Plants               
  Susquehanna  90.00% $ 4,608    $ 3,496 $ 42
  Conemaugh  16.25%   233      115   14
  Keystone  12.34%   198      69   3
  Trimble County Units 1 & 2  75.00%   1,245      61   35
 Merrill Creek Reservoir  8.37%    $ 22   15   

PPL Energy Supply               
 December 31, 2012               
 Generating Plants               
  Susquehanna  90.00% $ 4,628    $ 3,530 $ 65
  Conemaugh  16.25%   238      122   30
  Keystone  12.34%   206      82   3
 Merrill Creek Reservoir  8.37%    $ 22   15   
                  
 December 31, 2011               
 Generating Plants               
  Susquehanna  90.00% $ 4,608    $ 3,496 $ 42
  Conemaugh  16.25%   233      115   14
  Keystone  12.34%   198      69   3
 Merrill Creek Reservoir  8.37%    $ 22   15   

LKE                
 December 31, 2012               
 Generating Plants               
  Trimble County Unit 1  75.00% $ 304    $ 33 $ 10
  Trimble County Unit 2  75.00%   975      79   33
                  
 December 31, 2011               
 Generating Plants               
  Trimble County Unit 1  75.00% $ 297    $ 19 $ 11
  Trimble County Unit 2  75.00%   948      42   24
                  
LG&E               
 December 31, 2012               
 Generating Plants               
  E.W. Brown Units 6-7  38.00% $ 40    $ 5   
  Paddy's Run Unit 13 & E.W. Brown Unit 5  53.00%   46      3   
  Trimble County Unit 1   75.00%   304      33 $ 10
  Trimble County Unit 2   14.25%   198      14   13
  Trimble County Units 5-6  29.00%   29      2   
  Trimble County Units 7-10  37.00%   68      6   2
  Cane Run Unit 7 CCGT  22.00%            16
                  
 December 31, 2011               
 Generating Plants               
  E.W. Brown Units 6-7  38.00% $ 39    $ 3   
  Paddy's Run Unit 13 & E.W. Brown Unit 5  53.00%   44      2 $ 5
  Trimble County Unit 1   75.00%   297      19   11
  Trimble County Unit 2   14.25%   190      7   7
  Trimble County Units 5-6  29.00%   31      1   
  Trimble County Units 7-10  37.00%   64      4   1
                  
KU                
 December 31, 2012               
 Generating Plants               
  E.W. Brown Units 6-7  62.00% $ 64    $ 7 $ 1
  Paddy's Run Unit 13 & E.W. Brown Unit 5  47.00%   42      2   
  Trimble County Unit 2   60.75%   777      65   20
  Trimble County Units 5-6  71.00%   70      4   
  Trimble County Units 7-10  63.00%   116      10   2
  Cane Run Unit 7 CCGT  78.00%            53
                  
 December 31, 2011               
 Generating Plants               
  E.W. Brown Units 6-7  62.00% $ 64    $ 5   
  Paddy's Run Unit 13 & E.W. Brown Unit 5  47.00%   39      2 $ 4
  Trimble County Unit 2   60.75%   758      35   17
  Trimble County Units 5-6  71.00%   66      2   4
  Trimble County Units 7-10  63.00%   109      6   5

Each subsidiary owning these interests provides its own funding for its share of the facility. Each receives a portion of the total output of the generating plants equal to its percentage ownership. The share of fuel and other operating costs associated with the plants is included in the corresponding operating expenses on the Statements of Income.

 

In addition to the interests mentioned above, at December 31, 2012 and 2011, PPL Montana has a 50% leasehold interest in Colstrip Units 1 and 2 and a 30% leasehold interest in Colstrip Unit 3 under operating leases. See Note 11 for additional information. At December 31, 2012 and 2011, NorthWestern owned a 30% interest in Colstrip Unit 4. PPL Montana and NorthWestern have a sharing agreement that governs each party's responsibilities and rights relating to the operation of Colstrip Units 3 and 4. Under the terms of that agreement, each party is responsible for 15% of the total non-coal operating and construction costs of Colstrip Units 3 and 4, regardless of whether a particular cost is specific to Colstrip Unit 3 or 4, and is entitled to take up to the same percentage of the available generation from Units 3 and 4.

Louisville Gas And Electric Co [Member]
  
Jointly Owned Facilities [Line Items]  
Jointly Owned Facilities

14. Jointly Owned Facilities

 

(PPL, PPL Energy Supply, LKE, LG&E and KU)

 

At December 31, 2012 and 2011, the Balance Sheets reflect the owned interests in the facilities listed below.

                Construction
     Ownership    Other Accumulated Work
     Interest Electric Plant Property Depreciation in Progress
PPL               
 December 31, 2012               
 Generating Plants               
  Susquehanna  90.00% $ 4,628    $ 3,530 $ 65
  Conemaugh  16.25%   238      122   30
  Keystone  12.34%   206      82   3
  Trimble County Units 1 & 2  75.00%   1,279      112   43
 Merrill Creek Reservoir  8.37%    $ 22   15   
                  
 December 31, 2011               
 Generating Plants               
  Susquehanna  90.00% $ 4,608    $ 3,496 $ 42
  Conemaugh  16.25%   233      115   14
  Keystone  12.34%   198      69   3
  Trimble County Units 1 & 2  75.00%   1,245      61   35
 Merrill Creek Reservoir  8.37%    $ 22   15   

PPL Energy Supply               
 December 31, 2012               
 Generating Plants               
  Susquehanna  90.00% $ 4,628    $ 3,530 $ 65
  Conemaugh  16.25%   238      122   30
  Keystone  12.34%   206      82   3
 Merrill Creek Reservoir  8.37%    $ 22   15   
                  
 December 31, 2011               
 Generating Plants               
  Susquehanna  90.00% $ 4,608    $ 3,496 $ 42
  Conemaugh  16.25%   233      115   14
  Keystone  12.34%   198      69   3
 Merrill Creek Reservoir  8.37%    $ 22   15   

LKE                
 December 31, 2012               
 Generating Plants               
  Trimble County Unit 1  75.00% $ 304    $ 33 $ 10
  Trimble County Unit 2  75.00%   975      79   33
                  
 December 31, 2011               
 Generating Plants               
  Trimble County Unit 1  75.00% $ 297    $ 19 $ 11
  Trimble County Unit 2  75.00%   948      42   24
                  
LG&E               
 December 31, 2012               
 Generating Plants               
  E.W. Brown Units 6-7  38.00% $ 40    $ 5   
  Paddy's Run Unit 13 & E.W. Brown Unit 5  53.00%   46      3   
  Trimble County Unit 1   75.00%   304      33 $ 10
  Trimble County Unit 2   14.25%   198      14   13
  Trimble County Units 5-6  29.00%   29      2   
  Trimble County Units 7-10  37.00%   68      6   2
  Cane Run Unit 7 CCGT  22.00%            16
                  
 December 31, 2011               
 Generating Plants               
  E.W. Brown Units 6-7  38.00% $ 39    $ 3   
  Paddy's Run Unit 13 & E.W. Brown Unit 5  53.00%   44      2 $ 5
  Trimble County Unit 1   75.00%   297      19   11
  Trimble County Unit 2   14.25%   190      7   7
  Trimble County Units 5-6  29.00%   31      1   
  Trimble County Units 7-10  37.00%   64      4   1
                  
KU                
 December 31, 2012               
 Generating Plants               
  E.W. Brown Units 6-7  62.00% $ 64    $ 7 $ 1
  Paddy's Run Unit 13 & E.W. Brown Unit 5  47.00%   42      2   
  Trimble County Unit 2   60.75%   777      65   20
  Trimble County Units 5-6  71.00%   70      4   
  Trimble County Units 7-10  63.00%   116      10   2
  Cane Run Unit 7 CCGT  78.00%            53
                  
 December 31, 2011               
 Generating Plants               
  E.W. Brown Units 6-7  62.00% $ 64    $ 5   
  Paddy's Run Unit 13 & E.W. Brown Unit 5  47.00%   39      2 $ 4
  Trimble County Unit 2   60.75%   758      35   17
  Trimble County Units 5-6  71.00%   66      2   4
  Trimble County Units 7-10  63.00%   109      6   5

Each subsidiary owning these interests provides its own funding for its share of the facility. Each receives a portion of the total output of the generating plants equal to its percentage ownership. The share of fuel and other operating costs associated with the plants is included in the corresponding operating expenses on the Statements of Income.

 

In addition to the interests mentioned above, at December 31, 2012 and 2011, PPL Montana has a 50% leasehold interest in Colstrip Units 1 and 2 and a 30% leasehold interest in Colstrip Unit 3 under operating leases. See Note 11 for additional information. At December 31, 2012 and 2011, NorthWestern owned a 30% interest in Colstrip Unit 4. PPL Montana and NorthWestern have a sharing agreement that governs each party's responsibilities and rights relating to the operation of Colstrip Units 3 and 4. Under the terms of that agreement, each party is responsible for 15% of the total non-coal operating and construction costs of Colstrip Units 3 and 4, regardless of whether a particular cost is specific to Colstrip Unit 3 or 4, and is entitled to take up to the same percentage of the available generation from Units 3 and 4.

Kentucky Utilities Co [Member]
  
Jointly Owned Facilities [Line Items]  
Jointly Owned Facilities

14. Jointly Owned Facilities

 

(PPL, PPL Energy Supply, LKE, LG&E and KU)

 

At December 31, 2012 and 2011, the Balance Sheets reflect the owned interests in the facilities listed below.

                Construction
     Ownership    Other Accumulated Work
     Interest Electric Plant Property Depreciation in Progress
PPL               
 December 31, 2012               
 Generating Plants               
  Susquehanna  90.00% $ 4,628    $ 3,530 $ 65
  Conemaugh  16.25%   238      122   30
  Keystone  12.34%   206      82   3
  Trimble County Units 1 & 2  75.00%   1,279      112   43
 Merrill Creek Reservoir  8.37%    $ 22   15   
                  
 December 31, 2011               
 Generating Plants               
  Susquehanna  90.00% $ 4,608    $ 3,496 $ 42
  Conemaugh  16.25%   233      115   14
  Keystone  12.34%   198      69   3
  Trimble County Units 1 & 2  75.00%   1,245      61   35
 Merrill Creek Reservoir  8.37%    $ 22   15   

PPL Energy Supply               
 December 31, 2012               
 Generating Plants               
  Susquehanna  90.00% $ 4,628    $ 3,530 $ 65
  Conemaugh  16.25%   238      122   30
  Keystone  12.34%   206      82   3
 Merrill Creek Reservoir  8.37%    $ 22   15   
                  
 December 31, 2011               
 Generating Plants               
  Susquehanna  90.00% $ 4,608    $ 3,496 $ 42
  Conemaugh  16.25%   233      115   14
  Keystone  12.34%   198      69   3
 Merrill Creek Reservoir  8.37%    $ 22   15   

LKE                
 December 31, 2012               
 Generating Plants               
  Trimble County Unit 1  75.00% $ 304    $ 33 $ 10
  Trimble County Unit 2  75.00%   975      79   33
                  
 December 31, 2011               
 Generating Plants               
  Trimble County Unit 1  75.00% $ 297    $ 19 $ 11
  Trimble County Unit 2  75.00%   948      42   24
                  
LG&E               
 December 31, 2012               
 Generating Plants               
  E.W. Brown Units 6-7  38.00% $ 40    $ 5   
  Paddy's Run Unit 13 & E.W. Brown Unit 5  53.00%   46      3   
  Trimble County Unit 1   75.00%   304      33 $ 10
  Trimble County Unit 2   14.25%   198      14   13
  Trimble County Units 5-6  29.00%   29      2   
  Trimble County Units 7-10  37.00%   68      6   2
  Cane Run Unit 7 CCGT  22.00%            16
                  
 December 31, 2011               
 Generating Plants               
  E.W. Brown Units 6-7  38.00% $ 39    $ 3   
  Paddy's Run Unit 13 & E.W. Brown Unit 5  53.00%   44      2 $ 5
  Trimble County Unit 1   75.00%   297      19   11
  Trimble County Unit 2   14.25%   190      7   7
  Trimble County Units 5-6  29.00%   31      1   
  Trimble County Units 7-10  37.00%   64      4   1
                  
KU                
 December 31, 2012               
 Generating Plants               
  E.W. Brown Units 6-7  62.00% $ 64    $ 7 $ 1
  Paddy's Run Unit 13 & E.W. Brown Unit 5  47.00%   42      2   
  Trimble County Unit 2   60.75%   777      65   20
  Trimble County Units 5-6  71.00%   70      4   
  Trimble County Units 7-10  63.00%   116      10   2
  Cane Run Unit 7 CCGT  78.00%            53
                  
 December 31, 2011               
 Generating Plants               
  E.W. Brown Units 6-7  62.00% $ 64    $ 5   
  Paddy's Run Unit 13 & E.W. Brown Unit 5  47.00%   39      2 $ 4
  Trimble County Unit 2   60.75%   758      35   17
  Trimble County Units 5-6  71.00%   66      2   4
  Trimble County Units 7-10  63.00%   109      6   5

Each subsidiary owning these interests provides its own funding for its share of the facility. Each receives a portion of the total output of the generating plants equal to its percentage ownership. The share of fuel and other operating costs associated with the plants is included in the corresponding operating expenses on the Statements of Income.

 

In addition to the interests mentioned above, at December 31, 2012 and 2011, PPL Montana has a 50% leasehold interest in Colstrip Units 1 and 2 and a 30% leasehold interest in Colstrip Unit 3 under operating leases. See Note 11 for additional information. At December 31, 2012 and 2011, NorthWestern owned a 30% interest in Colstrip Unit 4. PPL Montana and NorthWestern have a sharing agreement that governs each party's responsibilities and rights relating to the operation of Colstrip Units 3 and 4. Under the terms of that agreement, each party is responsible for 15% of the total non-coal operating and construction costs of Colstrip Units 3 and 4, regardless of whether a particular cost is specific to Colstrip Unit 3 or 4, and is entitled to take up to the same percentage of the available generation from Units 3 and 4.