Acquisitions, Development and Divestitures	3 Months Ended
Mar. 31, 2013
Acquisitions Development And Divestitures [Abstract]
Acquisitions, Development and Divestitures	8. Acquisitions, Development and Divestitures (PPL, PPL Energy Supply, PPL Electric, LKE, LG&E and KU) The Registrants from time to time evaluate opportunities for potential acquisitions, divestitures and development projects. Development projects are reexamined based on market conditions and other factors to determine whether to proceed with the projects, sell, cancel or expand them, execute tolling agreements or pursue other options. Any resulting transactions may impact future financial results. Acquisitions Ironwood Acquisition (PPL and PPL Energy Supply) See Note 10 in PPL's and PPL Energy Supply's 2012 Form 10-K for information on the April 13, 2012 Ironwood Acquisition. See Note 7 for information on the February 2013 exchange of a portion of long-term debt assumed through consolidation as a result of the acquisition. Development (PPL and PPL Energy Supply) Bell Bend COLA The NRC continues to review the COLA submitted by a PPL Energy Supply subsidiary, PPL Bell Bend, LLC (PPL Bell Bend) for the proposed Bell Bend nuclear generating unit (Bell Bend) to be built adjacent to the Susquehanna plant. PPL Bell Bend does not expect to complete the COLA review process with the NRC prior to 2015. PPL Bell Bend has made no decision to proceed with construction of Bell Bend and expects that such decision will not be made for several years given the anticipated lengthy NRC license approval process. Additionally, PPL Bell Bend does not expect to proceed with construction absent favorable economics, a joint arrangement with other interested parties and a federal loan guarantee or other acceptable financing. PPL Bell Bend is currently authorized to spend up to $205 million through 2015 on the COLA and other permitting costs necessary for construction, which is expected to be sufficient to fund the project through receipt of the license. At March 31, 2013 and December 31, 2012, $159 million and $154 million of costs, which includes capitalized interest, associated with the licensing application were capitalized and are included on the Balance Sheets in noncurrent "Other intangibles." PPL Bell Bend believes that the estimated fair value of the COLA currently exceeds the costs expected to be capitalized associated with the licensing application. See Note 8 in PPL's and PPL Energy Supply's 2012 Form 10-K for additional information. Hydroelectric Expansion Project In the first quarter of 2013, the redevelopment of the Rainbow hydroelectric facility at Great Falls, Montana was placed in service and added 28 MW of capacity to the facility. Regional Transmission Line Expansion Plan (PPL and PPL Electric) Susquehanna-Roseland On October 1, 2012, the National Park Service (NPS) issued its Record of Decision (ROD) on the proposed Susquehanna-Roseland transmission line affirming the route chosen by PPL Electric and Public Service Electric & Gas Company as the preferred alternative under the NPS's National Environmental Policy Act review. On October 15, 2012, a complaint was filed in the United States District Court for the District of Columbia by various environmental groups, including the Sierra Club, challenging the ROD and seeking to prohibit its implementation, and on December 6, 2012, the groups filed a petition for injunctive relief seeking to prohibit all construction activities until the court issues a final decision on the complaint. PPL Electric has intervened in the lawsuit. On February 25, 2013, the District Court denied Plaintiffs' Motion for Preliminary Injunction and set a briefing schedule. However, plaintiffs have the right to reinstate the motion if the District Court has not ruled on the lawsuit and construction is imminent. The chosen route had previously been approved by the PUC and the New Jersey Board of Public Utilities. On December 13, 2012, PPL Electric received federal construction and right of way permits to build on National Park Service lands. Construction activities have begun on portions of the 101-mile route in Pennsylvania. The line is expected to be completed before the peak summer demand period of 2015. At March 31, 2013, PPL Electric's estimated share of the project cost was $630 million. PPL and PPL Electric cannot predict the ultimate outcome or timing of any legal challenges to the project or what additional actions, if any, PJM might take in the event of a further delay to the scheduled in-service date for the new line. Northeast/Pocono In October 2012, the FERC issued an order in response to PPL Electric's December 2011 request for ratemaking incentives for the Northeast/Pocono Reliability project (a new 58-mile 230 kV transmission line that includes three new substations and upgrades to adjacent facilities). The FERC granted the incentive for inclusion of all prudently incurred construction work in progress (CWIP) costs in rate base but denied the request for a 100 basis point adder to the return on equity incentive. The order required a follow-up compliance filing from PPL Electric to ensure proper accounting treatment of AFUDC and CWIP for the project, which PPL Electric submitted to the FERC in March 2013 and the FERC subsequently approved in April 2013. In December 2012, PPL Electric submitted an application to the PUC requesting permission to site and construct the project. A number of parties have protested the application, which has been assigned to an Administrative Law Judge. Evidentiary hearings are scheduled in July 2013. A final Commission order is expected in the first quarter of 2014. PPL Electric expects the project to be completed in 2017. At March 31, 2013, PPL Electric estimates the total project costs to be approximately $200 million with approximately $190 million qualifying for the CWIP incentive. See Note 8 in PPL's and PPL Electric's 2012 Form 10-K for additional information.

Acquisitions, Development and Divestitures

3 Months Ended

Mar. 31, 2013

Acquisitions Development And Divestitures [Abstract]

Acquisitions, Development and Divestitures

8. Acquisitions, Development and Divestitures

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

The Registrants from time to time evaluate opportunities for potential acquisitions, divestitures and development projects. Development projects are reexamined based on market conditions and other factors to determine whether to proceed with the projects, sell, cancel or expand them, execute tolling agreements or pursue other options. Any resulting transactions may impact future financial results.

Acquisitions

Ironwood Acquisition (PPL and PPL Energy Supply)

See Note 10 in PPL's and PPL Energy Supply's 2012 Form 10-K for information on the April 13, 2012 Ironwood Acquisition. See Note 7 for information on the February 2013 exchange of a portion of long-term debt assumed through consolidation as a result of the acquisition.

Development

(PPL and PPL Energy Supply)

Bell Bend COLA

The NRC continues to review the COLA submitted by a PPL Energy Supply subsidiary, PPL Bell Bend, LLC (PPL Bell Bend) for the proposed Bell Bend nuclear generating unit (Bell Bend) to be built adjacent to the Susquehanna plant. PPL Bell Bend does not expect to complete the COLA review process with the NRC prior to 2015. PPL Bell Bend has made no decision to proceed with construction of Bell Bend and expects that such decision will not be made for several years given the anticipated lengthy NRC license approval process. Additionally, PPL Bell Bend does not expect to proceed with construction absent favorable economics, a joint arrangement with other interested parties and a federal loan guarantee or other acceptable financing. PPL Bell Bend is currently authorized to spend up to $205 million through 2015 on the COLA and other permitting costs necessary for construction, which is expected to be sufficient to fund the project through receipt of the license. At March 31, 2013 and December 31, 2012, $159 million and $154 million of costs, which includes capitalized interest, associated with the licensing application were capitalized and are included on the Balance Sheets in noncurrent "Other intangibles." PPL Bell Bend believes that the estimated fair value of the COLA currently exceeds the costs expected to be capitalized associated with the licensing application. See Note 8 in PPL's and PPL Energy Supply's 2012 Form 10-K for additional information.

Hydroelectric Expansion Project

In the first quarter of 2013, the redevelopment of the Rainbow hydroelectric facility at Great Falls, Montana was placed in service and added 28 MW of capacity to the facility.

Regional Transmission Line Expansion Plan (PPL and PPL Electric)

Susquehanna-Roseland

On October 1, 2012, the National Park Service (NPS) issued its Record of Decision (ROD) on the proposed Susquehanna-Roseland transmission line affirming the route chosen by PPL Electric and Public Service Electric & Gas Company as the preferred alternative under the NPS's National Environmental Policy Act review. On October 15, 2012, a complaint was filed in the United States District Court for the District of Columbia by various environmental groups, including the Sierra Club, challenging the ROD and seeking to prohibit its implementation, and on December 6, 2012, the groups filed a petition for injunctive relief seeking to prohibit all construction activities until the court issues a final decision on the complaint. PPL Electric has intervened in the lawsuit. On February 25, 2013, the District Court denied Plaintiffs' Motion for Preliminary Injunction and set a briefing schedule. However, plaintiffs have the right to reinstate the motion if the District Court has not ruled on the lawsuit and construction is imminent. The chosen route had previously been approved by the PUC and the New Jersey Board of Public Utilities.

On December 13, 2012, PPL Electric received federal construction and right of way permits to build on National Park Service lands.

Construction activities have begun on portions of the 101-mile route in Pennsylvania. The line is expected to be completed before the peak summer demand period of 2015. At March 31, 2013, PPL Electric's estimated share of the project cost was $630 million.

PPL and PPL Electric cannot predict the ultimate outcome or timing of any legal challenges to the project or what additional actions, if any, PJM might take in the event of a further delay to the scheduled in-service date for the new line.

Northeast/Pocono

In October 2012, the FERC issued an order in response to PPL Electric's December 2011 request for ratemaking incentives for the Northeast/Pocono Reliability project (a new 58-mile 230 kV transmission line that includes three new substations and upgrades to adjacent facilities). The FERC granted the incentive for inclusion of all prudently incurred construction work in progress (CWIP) costs in rate base but denied the request for a 100 basis point adder to the return on equity incentive. The order required a follow-up compliance filing from PPL Electric to ensure proper accounting treatment of AFUDC and CWIP for the project, which PPL Electric submitted to the FERC in March 2013 and the FERC subsequently approved in April 2013.

In December 2012, PPL Electric submitted an application to the PUC requesting permission to site and construct the project. A number of parties have protested the application, which has been assigned to an Administrative Law Judge. Evidentiary hearings are scheduled in July 2013. A final Commission order is expected in the first quarter of 2014. PPL Electric expects the project to be completed in 2017. At March 31, 2013, PPL Electric estimates the total project costs to be approximately $200 million with approximately $190 million qualifying for the CWIP incentive.

See Note 8 in PPL's and PPL Electric's 2012 Form 10-K for additional information.