Commitments and Contingencies (Environmental Matter and Other) (Details) - 6 months ended Jun. 30, 2015 - Integer	Total
Environmental Matters - Domestic - Air (Numeric) [Abstract]
Number of criteria pollutants	6
Environmental Matters - Domestic - Air - Climate Change (Numeric) [Abstract]
Percentage reduction of greenhouse gas emissions below 2005 levels by 2020	17.00%
Number of electric utility companies affected by a September 2009 U.S. Court of Appeals for the Second Circuit decision	5
Environmental Matters - Domestic - Water/Waste - Coal Combustion Residuals (Numeric) [Abstract]
Minimum period to commence or complete closure activities under certain activities for coal combustion residuals (in years)	03 years
Maximum period to commence or complete closure activities under certain activities for coal combustion residuals (in years)	10 years
PPL Electric Utilities Corp [Member]
Environmental Matters - Domestic - Air - Climate Change (Numeric) [Abstract]
Percentage reduction of greenhouse gas emissions below 2005 levels by 2020	17.00%
LG And E And KU Energy LLC [Member]
Environmental Matters - Domestic - Air (Numeric) [Abstract]
Number of criteria pollutants	6
Environmental Matters - Domestic - Air - Climate Change (Numeric) [Abstract]
Percentage reduction of greenhouse gas emissions below 2005 levels by 2020	17.00%
Number of electric utility companies affected by a September 2009 U.S. Court of Appeals for the Second Circuit decision	5
Environmental Matters - Domestic - Water/Waste - Coal Combustion Residuals (Numeric) [Abstract]
Minimum period to commence or complete closure activities under certain activities for coal combustion residuals (in years)	03 years
Maximum period to commence or complete closure activities under certain activities for coal combustion residuals (in years)	10 years
Louisville Gas And Electric Co [Member]
Environmental Matters - Domestic - Air (Numeric) [Abstract]
Number of criteria pollutants	6
Environmental Matters - Domestic - Air - Climate Change (Numeric) [Abstract]
Percentage reduction of greenhouse gas emissions below 2005 levels by 2020	17.00%
Number of electric utility companies affected by a September 2009 U.S. Court of Appeals for the Second Circuit decision	5
Environmental Matters - Domestic - Water/Waste - Coal Combustion Residuals (Numeric) [Abstract]
Minimum period to commence or complete closure activities under certain activities for coal combustion residuals (in years)	03 years
Maximum period to commence or complete closure activities under certain activities for coal combustion residuals (in years)	10 years
Kentucky Utilities Co [Member]
Environmental Matters - Domestic - Air (Numeric) [Abstract]
Number of criteria pollutants	6
Environmental Matters - Domestic - Air - Climate Change (Numeric) [Abstract]
Percentage reduction of greenhouse gas emissions below 2005 levels by 2020	17.00%
Number of electric utility companies affected by a September 2009 U.S. Court of Appeals for the Second Circuit decision	5
Environmental Matters - Domestic - Water/Waste - Coal Combustion Residuals (Numeric) [Abstract]
Minimum period to commence or complete closure activities under certain activities for coal combustion residuals (in years)	03 years
Maximum period to commence or complete closure activities under certain activities for coal combustion residuals (in years)	10 years