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CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 vote | Dec. 31, 2018 vote | Dec. 31, 2017 USD ($) vote
Vote per share of PPL's common stock | vote | 1 | 1 | 1
PPL Electric Utilities Corp [Member] |  |  |
Non-cash contributions related to remeasurement and separation of benefit plans | $ |  |  | $ 56

X
- Definition Amount of non-cash contributions related to the remeasurement and separation of pension and postretirement benefit plans with the spinoff entity, which impacted the subsidiaries allocated net benefit obligation from the parent. + References No definition available. + Details
Name: | ppl_CapitalContributionsFromParentNonCash
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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

X
- Details
Name: | dei_LegalEntityAxis=ppl_PplElectricUtilitiesCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |