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CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) (Parenthetical) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) vote | Sep. 30, 2019 vote | Sep. 30, 2020 USD ($) vote | Sep. 30, 2019 vote
Vote per share of PPL's common stock | vote | 1 | 1 | 1 | 1
Tax Effect Of New Accounting Principle In Period Of Adoption | $ 0 |  | $ 0 |
Earnings Reinvested [Member] |  |  |  |
Tax Effect Of New Accounting Principle In Period Of Adoption | $ 0 |  | $ 0 |

X
- Definition Tax effect of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. + References No definition available. + Details
Name: | ppl_TaxEffectOfNewAccountingPrincipleInPeriodOfAdoption
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The number of votes each holder of one share of the company's common stock is entitled to on any questions presented to any shareowners' meeting. + References No definition available. + Details
Name: | ppl_VotesPerShareOfCommonStock
Namespace Prefix: | ppl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_RetainedEarningsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |