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

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.

No definition available.

Name:	ppl_TaxEffectOfNewAccountingPrincipleInPeriodOfAdoption
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant