Preferred Securities	12 Months Ended
Preferred Securities	Dec. 31, 2014
Preferred Securities [Line Items]
Preferred Securities	3. Preferred Securities (PPL) In June 2012, PPL Electric redeemed all $250 million of its preference stock at par value, without premium. PPL is authorized to issue up to 10 million shares of preferred stock. No PPL preferred stock was issued or outstanding in 2014, 2013 or 2012. (PPL Electric) PPL Electric is authorized to issue up to 20,629,936 shares of preferred stock. No PPL Electric preferred stock was issued or outstanding in 2014, 2013 or 2012. Prior to October 31, 2013, PPL Electric was authorized to issue up to 10 million shares of preference stock. In June 2012, PPL Electric redeemed, at par, all 2.5 million shares of its outstanding 6.25% Series Preference Stock (Preference Shares), par value of $100 per share. (LG&E) LG&E is authorized to issue up to 1,720,000 shares of preferred stock at a $25 par value and 6,750,000 shares of preferred stock without par value. LG&E had no preferred stock issued or outstanding in 2014, 2013 or 2012. (KU) KU is authorized to issue up to 5,300,000 shares of preferred stock and 2,000,000 shares of preference stock without par value. KU had no preferred or preference stock issued or outstanding in 2014, 2013 or 2012.
PPL Electric Utilities Corp [Member]
Preferred Securities [Line Items]
Preferred Securities	3. Preferred Securities (PPL) In June 2012, PPL Electric redeemed all $250 million of its preference stock at par value, without premium. PPL is authorized to issue up to 10 million shares of preferred stock. No PPL preferred stock was issued or outstanding in 2014, 2013 or 2012. (PPL Electric) PPL Electric is authorized to issue up to 20,629,936 shares of preferred stock. No PPL Electric preferred stock was issued or outstanding in 2014, 2013 or 2012. Prior to October 31, 2013, PPL Electric was authorized to issue up to 10 million shares of preference stock. In June 2012, PPL Electric redeemed, at par, all 2.5 million shares of its outstanding 6.25% Series Preference Stock (Preference Shares), par value of $100 per share. (LG&E) LG&E is authorized to issue up to 1,720,000 shares of preferred stock at a $25 par value and 6,750,000 shares of preferred stock without par value. LG&E had no preferred stock issued or outstanding in 2014, 2013 or 2012. (KU) KU is authorized to issue up to 5,300,000 shares of preferred stock and 2,000,000 shares of preference stock without par value. KU had no preferred or preference stock issued or outstanding in 2014, 2013 or 2012.
Louisville Gas And Electric Co [Member]
Preferred Securities [Line Items]
Preferred Securities	3. Preferred Securities (PPL) In June 2012, PPL Electric redeemed all $250 million of its preference stock at par value, without premium. PPL is authorized to issue up to 10 million shares of preferred stock. No PPL preferred stock was issued or outstanding in 2014, 2013 or 2012. (PPL Electric) PPL Electric is authorized to issue up to 20,629,936 shares of preferred stock. No PPL Electric preferred stock was issued or outstanding in 2014, 2013 or 2012. Prior to October 31, 2013, PPL Electric was authorized to issue up to 10 million shares of preference stock. In June 2012, PPL Electric redeemed, at par, all 2.5 million shares of its outstanding 6.25% Series Preference Stock (Preference Shares), par value of $100 per share. (LG&E) LG&E is authorized to issue up to 1,720,000 shares of preferred stock at a $25 par value and 6,750,000 shares of preferred stock without par value. LG&E had no preferred stock issued or outstanding in 2014, 2013 or 2012. (KU) KU is authorized to issue up to 5,300,000 shares of preferred stock and 2,000,000 shares of preference stock without par value. KU had no preferred or preference stock issued or outstanding in 2014, 2013 or 2012.
Kentucky Utilities Co [Member]
Preferred Securities [Line Items]
Preferred Securities	3. Preferred Securities (PPL) In June 2012, PPL Electric redeemed all $250 million of its preference stock at par value, without premium. PPL is authorized to issue up to 10 million shares of preferred stock. No PPL preferred stock was issued or outstanding in 2014, 2013 or 2012. (PPL Electric) PPL Electric is authorized to issue up to 20,629,936 shares of preferred stock. No PPL Electric preferred stock was issued or outstanding in 2014, 2013 or 2012. Prior to October 31, 2013, PPL Electric was authorized to issue up to 10 million shares of preference stock. In June 2012, PPL Electric redeemed, at par, all 2.5 million shares of its outstanding 6.25% Series Preference Stock (Preference Shares), par value of $100 per share. (LG&E) LG&E is authorized to issue up to 1,720,000 shares of preferred stock at a $25 par value and 6,750,000 shares of preferred stock without par value. LG&E had no preferred stock issued or outstanding in 2014, 2013 or 2012. (KU) KU is authorized to issue up to 5,300,000 shares of preferred stock and 2,000,000 shares of preference stock without par value. KU had no preferred or preference stock issued or outstanding in 2014, 2013 or 2012.