Acquisitions, Development and Divestitures	3 Months Ended
Mar. 31, 2014
Acquisitions Development And Divestitures [Abstract]
Acquisitions, Development and Divestitures	8. Acquisitions, Development and Divestitures (All Registrants) 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. See Note 8 in the 2013 Form 10-K for additional information. Development Hydroelectric Expansion Project (PPL and PPL Energy Supply) In January 2014, the U.S. Department of Treasury awarded $56 million for Specified Energy Property in Lieu of Tax Credits for the Rainbow hydroelectric redevelopment project in Great Falls, Montana. PPL Energy Supply accepted and accounted for the receipt of the grant in 2014. PPL Energy Supply was required to recapture $60 million of investment tax credits previously recorded related to the Rainbow project as a result of the grant receipt. The impact on the financial statements of accounting for the grant receipt and recapture of investment tax credits was not significant for the three months ended March 31, 2014, and will not be significant in future periods. Regional Transmission Line Expansion Plan (PPL and PPL Electric) Susquehanna-Roseland Project PPL Electric's construction activities have been underway on the 101-mile Pennsylvania transmission line project since 2012. The line is expected to be completed before the peak summer demand period of 2015. At March 31, 2014, PPL Electric's estimate of the project costs was $630 million. At March 31, 2014 and December 31, 2013, $458 million and $377 million of costs were capitalized and are included on the Balance Sheets primarily in "Construction work in progress." Other (PPL and PPL Energy Supply) Montana Hydro Sale Agreement In September 2013, PPL Montana executed a definitive agreement to sell to NorthWestern its hydroelectric generating facilities located in Montana (with a generation capacity of 633 MW) for $900 million in cash, subject to certain adjustments. The sale, which is not expected to close before the second half of 2014, includes 11 hydroelectric power facilities and related assets. In April 2014, the U.S. Department of Justice and Federal Trade Commission granted early termination of PPL Montana's and NorthWestern's notifications under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. The sale remains subject to closing conditions, including receipt of regulatory approvals by the FERC and the Montana Public Service Commission and certain third-party consents. Due to the uncertainties related to certain of these conditions as of March 31, 2014, the sale did not meet the applicable accounting criteria for the assets and liabilities included in the transaction to be classified as held for sale on the balance sheet.

Acquisitions, Development and Divestitures

3 Months Ended

Mar. 31, 2014

Acquisitions Development And Divestitures [Abstract]

Acquisitions, Development and Divestitures

8. Acquisitions, Development and Divestitures

(All Registrants)

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. See Note 8 in the 2013 Form 10-K for additional information.

Development

Hydroelectric Expansion Project (PPL and PPL Energy Supply)

In January 2014, the U.S. Department of Treasury awarded $56 million for Specified Energy Property in Lieu of Tax Credits for the Rainbow hydroelectric redevelopment project in Great Falls, Montana. PPL Energy Supply accepted and accounted for the receipt of the grant in 2014. PPL Energy Supply was required to recapture $60 million of investment tax credits previously recorded related to the Rainbow project as a result of the grant receipt. The impact on the financial statements of accounting for the grant receipt and recapture of investment tax credits was not significant for the three months ended March 31, 2014, and will not be significant in future periods.

Regional Transmission Line Expansion Plan (PPL and PPL Electric)

Susquehanna-Roseland Project

PPL Electric's construction activities have been underway on the 101-mile Pennsylvania transmission line project since 2012. The line is expected to be completed before the peak summer demand period of 2015. At March 31, 2014, PPL Electric's estimate of the project costs was $630 million. At March 31, 2014 and December 31, 2013, $458 million and $377 million of costs were capitalized and are included on the Balance Sheets primarily in "Construction work in progress."

Other (PPL and PPL Energy Supply)

Montana Hydro Sale Agreement

In September 2013, PPL Montana executed a definitive agreement to sell to NorthWestern its hydroelectric generating facilities located in Montana (with a generation capacity of 633 MW) for $900 million in cash, subject to certain adjustments. The sale, which is not expected to close before the second half of 2014, includes 11 hydroelectric power facilities and related assets. In April 2014, the U.S. Department of Justice and Federal Trade Commission granted early termination of PPL Montana's and NorthWestern's notifications under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. The sale remains subject to closing conditions, including receipt of regulatory approvals by the FERC and the Montana Public Service Commission and certain third-party consents. Due to the uncertainties related to certain of these conditions as of March 31, 2014, the sale did not meet the applicable accounting criteria for the assets and liabilities included in the transaction to be classified as held for sale on the balance sheet.