Document and Entity Information
| Document and Entity Information | Mar. 17, 2021 |
| Document And Entity Information [Line Items] | |
| Entity Registrant Name | PPL Corp |
| Amendment Flag | false |
| Entity Central Index Key | 0000922224 |
| Document Type | 8-K |
| Document Period End Date | Mar. 17, 2021 |
| Entity File Number | 1-11459 |
| Entity Tax Identification Number | 23-2758192 |
| Entity Incorporation State 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock of PPL Corporation Junior Subordinated Notes of PPL Capital Funding, Inc. |
| Trading Symbol | PPL |
| Security Exchange Name | NYSE |
| A 2007 Series A Due 2067 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 2007 Series A due 2067 |
| Trading Symbol | PPL/67 |
| Security Exchange Name | NYSE |
| A 2013 Series B Due 2073 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 2013 Series B due 2073 |
| Trading Symbol | PPX |
| Security Exchange Name | NYSE |