Class of Stock [Domain] Class of Stock [Domain] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code KENTUCKY UTILITIES CO KENTUCKY UTILITIES CO [Member] An indirect subsidiary of PPL and a public utility subsidiary of LKE engaged in the regulated generation, transmission, distribution and sale of electricity primarily in Kentucky. Class of Stock [Axis] Class of Stock [Axis] Security Exchange Name Security Exchange Name 2007 Series A Due 2067 2007 Series A Due 2067 [Member] 2007 Series A Due 2067 [Member] Entity Address, City or Town Entity Address, City or Town Soliciting Material Soliciting Material Entity Incorporation State Country Code 1 Entity Incorporation State Country Code 1 Entity Incorporation State Country Code 1 Legal Entity [Axis] Legal Entity [Axis] City Area Code City Area Code Common Stock Common Stock [Member] PPL ELECTRIC UTILITIES CORP PPL ELECTRIC UTILITIES CORP [Member] A direct subsidiary of PPL and a regulated public utility. PPL Electric delivers electricity in its Pennsylvania service territory and provides electricity supply to retail customers in that territory as a provider of last resort under the Customer Choice Act. Entity Tax Identification Number Entity Tax Identification Number Amendment Flag Amendment Flag Entity Registrant Name Entity Registrant Name Trading Symbol Trading Symbol Pre-commencement Tender Offer Pre-commencement Tender Offer Entity Emerging Growth Company Entity Emerging Growth Company LOUISVILLE GAS and ELECTRIC CO LOUISVILLE GAS and ELECTRIC CO [Member] An indirect subsidiary of PPL and a public utility subsidiary of LKE engaged in the regulated generation, transmission, distribution and sale of electricity in Kentucky, and distribution and sale of natural gas in Kentucky. Document Entity [Table] Document Entity [Table] Document Entity Entity Central Index Key Entity Central Index Key Entity File Number Entity File Number Entity Address, State or Province Entity Address, State or Province Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Document and Entity Information [Abstract] Document and Entity Information Entity Address, Address Line One Entity Address, Address Line One Entity Address, Postal Zip Code Entity Address, Postal Zip Code Written Communications Written Communications Local Phone Number Local Phone Number Entity [Domain] Entity [Domain] Title of 12(b) Security Title of 12(b) Security Document Period End Date Document Period End Date Document Type Document Type Document Entity Information [Line Items] Document Entity Information [Line Items] Document Entity Information