| Document and Entity Information Document and Entity Information | Nov. 13, 2020 |
| Document Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Emerging Growth Company | false |
| Written Communications | false |
| Document Type | 8-K |
| Entity File Number | 1-11459 |
| Entity Registrant Name | PPL Corporation |
| Entity Tax Identification Number | 23-2758192 |
| Entity Incorporation, State or Country Code | PA |
| Entity Address, Address Line One | Two North Ninth Street |
| Entity Address, City or Town | Allentown, |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 18101-1179 |
| City Area Code | (610) |
| Local Phone Number | 774-5151 |
| Document Period End Date | Nov. 13, 2020 |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Central Index Key | 0000922224 |
| Common Stock [Member] | |
| Document Entity Information [Line Items] | |
| Title of 12(b) Security | Common Stock of PPL Corporation |
| Trading Symbol | PPL |
| Security Exchange Name | NYSE |
| 2007 Series A Due 2067 [Member] | |
| Document Entity Information [Line Items] | |
| Title of 12(b) Security | 2007 Series A due 2067 |
| Trading Symbol | PPL/67 |
| Security Exchange Name | NYSE |
| 2013 Series B Due 2073 [Member] | |
| Document Entity Information [Line Items] | |
| Title of 12(b) Security | 2013 Series B due 2073 |
| Trading Symbol | PPX |
| Security Exchange Name | NYSE |
| LG And E And KU Energy LLC [Member] | |
| Document Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Emerging Growth Company | false |
| Entity File Number | 333-173665 |
| Entity Registrant Name | LG&E and KU Energy LLC |
| Entity Tax Identification Number | 20-0523163 |
| Entity Incorporation, State or Country Code | KY |
| Entity Address, Address Line One | 220 West Main Street |
| Entity Address, City or Town | Louisville, |
| Entity Address, State or Province | KY |
| Entity Address, Postal Zip Code | 40202-1377 |
| City Area Code | (502) |
| Local Phone Number | 627-2000 |
| Entity Central Index Key | 0001518339 |
| Louisville Gas And Electric Co [Member] | |
| Document Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Emerging Growth Company | false |
| Entity File Number | 1-2893 |
| Entity Registrant Name | Louisville Gas and Electric Company |
| Entity Tax Identification Number | 61-0264150 |
| Entity Incorporation, State or Country Code | KY |
| Entity Address, Address Line One | 220 West Main Street |
| Entity Address, City or Town | Louisville, |
| Entity Address, State or Province | KY |
| Entity Address, Postal Zip Code | 40202-1377 |
| City Area Code | (502) |
| Local Phone Number | 627-2000 |
| Entity Central Index Key | 0000060549 |
| Kentucky Utilities Co [Member] | |
| Document Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Emerging Growth Company | false |
| Entity File Number | 1-3464 |
| Entity Registrant Name | Kentucky Utilities Company |
| Entity Tax Identification Number | 61-0247570 |
| Entity Incorporation, State or Country Code | KY |
| Entity Incorporation, State or Country Code | Virginia |
| Entity Address, Address Line One | One Quality Street |
| Entity Address, City or Town | Lexington, |
| Entity Address, State or Province | KY |
| Entity Address, Postal Zip Code | 40507-1462 |
| City Area Code | (502) |
| Local Phone Number | 627-2000 |
| Entity Central Index Key | 0000055387 |
