| Document and Entity Information Document and Entity Information | Oct. 01, 2020 |
| Document Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0000922224 |
| 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 | Oct. 1, 2020 |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| 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 |
