Document and Entity Information	6 Months Ended
Jun. 30, 2012	Jul. 31, 2012
Document Entity Information [Line Items]
Document Type	10-Q
Document Period End Date	Jun. 30, 2012
Amendment Flag	true
Amendment Description	This Amendment No. 1 on Form 10-Q/A amends the Quarterly Report on Form 10-Q of PPL Corporation, PPL Energy Supply, LLC, PPL Electric Utilities Corporation LG&E and KU Energy LLC, Louisville Gas and Electric Company and Kentucky Utilities Company for the period ended June 30, 2012, as filed by the Registrants on August 8, 2012 (Original Filing). This Amendment No. 1 is being filed solely to resubmit certain Extensible Business Reporting Language (XBRL) information in Exhibit 101 that was inadvertently excluded from the timely filed Original Filing, in accordance with Rule 405 of Regulation S−T. This Amendment No. 1 does not reflect events that have occurred subsequent to the filing date of the Original Filing.
Entity Registrant Name	PPL Corp
Entity Central Index Key	0000922224
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		580,736,054
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q2
PPL Energy Supply LLC [Member]
Document Entity Information [Line Items]
Amendment Flag	true
Amendment Description	This Amendment No. 1 on Form 10-Q/A amends the Quarterly Report on Form 10-Q of PPL Corporation, PPL Energy Supply, LLC, PPL Electric Utilities Corporation LG&E and KU Energy LLC, Louisville Gas and Electric Company and Kentucky Utilities Company for the period ended June 30, 2012, as filed by the Registrants on August 8, 2012 (Original Filing). This Amendment No. 1 is being filed solely to resubmit certain Extensible Business Reporting Language (XBRL) information in Exhibit 101 that was inadvertently excluded from the timely filed Original Filing, in accordance with Rule 405 of Regulation S−T. This Amendment No. 1 does not reflect events that have occurred subsequent to the filing date of the Original Filing.
Entity Registrant Name	PPL ENERGY SUPPLY LLC
Entity Central Index Key	0001161976
Entity Well-known Seasoned Issuer	No
Entity Filer Category	Non-accelerated Filer
PPL Electric Utilities Corp [Member]
Document Entity Information [Line Items]
Amendment Flag	true
Amendment Description	This Amendment No. 1 on Form 10-Q/A amends the Quarterly Report on Form 10-Q of PPL Corporation, PPL Energy Supply, LLC, PPL Electric Utilities Corporation LG&E and KU Energy LLC, Louisville Gas and Electric Company and Kentucky Utilities Company for the period ended June 30, 2012, as filed by the Registrants on August 8, 2012 (Original Filing). This Amendment No. 1 is being filed solely to resubmit certain Extensible Business Reporting Language (XBRL) information in Exhibit 101 that was inadvertently excluded from the timely filed Original Filing, in accordance with Rule 405 of Regulation S−T. This Amendment No. 1 does not reflect events that have occurred subsequent to the filing date of the Original Filing.
Entity Registrant Name	PPL ELECTRIC UTILITIES CORP
Entity Central Index Key	0000317187
Entity Well-known Seasoned Issuer	No
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		66,368,056
LG And E And KU Energy LLC [Member]
Document Entity Information [Line Items]
Amendment Flag	true
Amendment Description	This Amendment No. 1 on Form 10-Q/A amends the Quarterly Report on Form 10-Q of PPL Corporation, PPL Energy Supply, LLC, PPL Electric Utilities Corporation LG&E and KU Energy LLC, Louisville Gas and Electric Company and Kentucky Utilities Company for the period ended June 30, 2012, as filed by the Registrants on August 8, 2012 (Original Filing). This Amendment No. 1 is being filed solely to resubmit certain Extensible Business Reporting Language (XBRL) information in Exhibit 101 that was inadvertently excluded from the timely filed Original Filing, in accordance with Rule 405 of Regulation S−T. This Amendment No. 1 does not reflect events that have occurred subsequent to the filing date of the Original Filing.
Entity Registrant Name	LG&E & KU Energy LLC
Entity Central Index Key	0001518339
Entity Well-known Seasoned Issuer	No
Entity Filer Category	Non-accelerated Filer
Louisville Gas And Electric Co [Member]
Document Entity Information [Line Items]
Amendment Flag	true
Amendment Description	This Amendment No. 1 on Form 10-Q/A amends the Quarterly Report on Form 10-Q of PPL Corporation, PPL Energy Supply, LLC, PPL Electric Utilities Corporation LG&E and KU Energy LLC, Louisville Gas and Electric Company and Kentucky Utilities Company for the period ended June 30, 2012, as filed by the Registrants on August 8, 2012 (Original Filing). This Amendment No. 1 is being filed solely to resubmit certain Extensible Business Reporting Language (XBRL) information in Exhibit 101 that was inadvertently excluded from the timely filed Original Filing, in accordance with Rule 405 of Regulation S−T. This Amendment No. 1 does not reflect events that have occurred subsequent to the filing date of the Original Filing.
Entity Registrant Name	LOUISVILLE GAS & ELECTRIC CO
Entity Central Index Key	0000060549
Entity Well-known Seasoned Issuer	No
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		21,294,223
Kentucky Utilities Co [Member]
Document Entity Information [Line Items]
Amendment Flag	true
Amendment Description	This Amendment No. 1 on Form 10-Q/A amends the Quarterly Report on Form 10-Q of PPL Corporation, PPL Energy Supply, LLC, PPL Electric Utilities Corporation LG&E and KU Energy LLC, Louisville Gas and Electric Company and Kentucky Utilities Company for the period ended June 30, 2012, as filed by the Registrants on August 8, 2012 (Original Filing). This Amendment No. 1 is being filed solely to resubmit certain Extensible Business Reporting Language (XBRL) information in Exhibit 101 that was inadvertently excluded from the timely filed Original Filing, in accordance with Rule 405 of Regulation S−T. This Amendment No. 1 does not reflect events that have occurred subsequent to the filing date of the Original Filing.
Entity Registrant Name	KENTUCKY UTILITIES CO
Entity Central Index Key	0000055387
Entity Well-known Seasoned Issuer	No
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		37,817,878

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