Term, in years, of bargaining agreement

No definition available.

Name:	ppl_CollectiveBargainingAgreementTerm
Namespace Prefix:	ppl_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum exposure of a guarantee related to the termination of a lease related to certain non-utility generating stations in western Kentucky until July 2009. This portion of the guarantee relates to covering operational, regulatory and environmental commitments and indemnifications made under the agreement.

+ References

No definition available.

+ Details

Name:	ppl_GuaranteeMaximumExposure2021
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum aggregate insurance coverage for liability assumed under contract for bodily injury and property damage.

+ References

No definition available.

+ Details

Name:	ppl_MaximumAggregateCoverageBodilyInjuryAndPropertyDamage
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The maximum period, in years, that indemnifications related to the dissolution of entities generally expire after the date of dissolution.

+ References

No definition available.

+ Details

Name:	ppl_MaximumPeriodInYearsThatIndemnificationsGenerallyExpire
Namespace Prefix:	ppl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The minimum period, in years, that indemnifications related to the dissolution of entities generally expire after the date of dissolution.

+ References

No definition available.

+ Details

Name:	ppl_MinimumPeriodInYearsThatIndemnificationsGenerallyExpire
Namespace Prefix:	ppl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	ppl_OtherGuaranteeNumericAbstract
Namespace Prefix:	ppl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Entity's contingent proportionate share of OVEC's outstanding debt.

+ References

No definition available.

+ Details

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

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248

+ Details

Name:	us-gaap_GuaranteeObligationsCurrentCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_GuaranteeObligationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248

+ Details

Name:	us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

States the reasons why the guarantor is unable to develop an estimate of the maximum potential amount of future payments under its guarantee (or each group of similar guarantees).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248

+ Details

Name:	us-gaap_GuaranteeObligationsMaximumExposureInestimable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Describe the approximate term of the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248

+ Details

Name:	us-gaap_GuaranteeObligationsTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ppl_GuaranteeByEntityAxis=ppl_PplGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=us-gaap_IndemnificationGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_GuaranteeByDescriptionAxis=ppl_WPDIndemnificationsForEntitiesInLiquidationSalesOfAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=us-gaap_FinancialGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_GuaranteeByDescriptionAxis=ppl_WpdGuaranteeOfPensionAndOtherObligationsOfUnconsolidatedEntitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_GuaranteeByEntityAxis=ppl_LouisvilleGasAndElectricAndKuEnergyGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_GuaranteeByDescriptionAxis=ppl_IndemnificationsIssuedByLkeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_GuaranteeByDescriptionAxis=ppl_GuaranteeForShortfallRelatedToOhioValleyElectricCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=ppl_LGAndEAndKUEnergyLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_GuaranteeByEntityAxis=ppl_LouisvilleGasAndElectricCompanyAndKentuckyUtilitiesGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_ByCompanyAxis=ppl_KentuckyUtilitiesCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=ppl_LouisvilleGasAndElectricCoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=ppl_KentuckyUtilitiesCoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and Contingencies - Guarantees and Other Assurances (Details) $ in Millions		1 Months Ended	9 Months Ended
	Nov. 04, 2020	Aug. 31, 2020	Sep. 30, 2020 USD ($) Integer	Dec. 31, 2019 USD ($)
Guarantor Obligations [Line Items]
Recorded liability for all guarantees			$ 5	$ 5
Other Guarantee (Numeric) [Abstract]
Maximum aggregate coverage bodily injury and property damage			225
PPL Guarantee [Member] \| Indemnification Guarantee [Member] \| WPD Indemnifications For Entities In Liquidation and Sales Of Assets [Member]
Guarantor Obligations [Line Items]
Maximum exposure			$ 10
Minimum Period In Years That Indemnifications Generally Expire \| Integer			2
Maximum Period In Years That Indemnifications Generally Expire \| Integer			7
PPL Guarantee [Member] \| Financial Guarantee [Member] \| WPD Guarantee Of Pension And Other Obligations Of Unconsolidated Entities [Member]
Guarantor Obligations [Line Items]
Maximum exposure			$ 90
LKE Guarantee [Member] \| Indemnification Guarantee [Member] \| Indemnification Of Lease Termination And Other Divestitures [Member]
Guarantor Obligations [Line Items]
Maximum exposure			$ 200
Term of guarantee (in years)			12
Maximum exposure of guarantee related to terminated lease specific to operational, regulatory and environmental issues			$ 200
LKE Guarantee [Member] \| Financial Guarantee [Member] \| LGE And KU Guarantee Of Shortfall Related To OVEC [Member]
Guarantor Obligations [Line Items]
Maximum exposure is not estimable			The maximum exposure and the expiration date of these potential obligations are not presently determinable.
Contingent proportionate share of OVEC's outstanding debt			$ 105
LG And E And KU Energy LLC [Member] \| Indemnification Guarantee [Member] \| Indemnification Of Lease Termination And Other Divestitures [Member]
Guarantor Obligations [Line Items]
Maximum exposure			$ 200
Term of guarantee (in years)			12
Maximum exposure of guarantee related to terminated lease specific to operational, regulatory and environmental issues			$ 200
LG And E And KU Energy LLC [Member] \| LGE And KU Guarantee [Member] \| Financial Guarantee [Member] \| LGE And KU Guarantee Of Shortfall Related To OVEC [Member]
Guarantor Obligations [Line Items]
Maximum exposure is not estimable			The maximum exposure and the expiration date of these potential obligations are not presently determinable
Contingent proportionate share of OVEC's outstanding debt			$ 105
LG And E And KU Energy LLC [Member] \| KU [Member]
Other Guarantee (Numeric) [Abstract]
Collective Bargaining Agreement Term		3 years
Louisville Gas And Electric Co [Member]
Other Guarantee (Numeric) [Abstract]
Collective Bargaining Agreement Term	3 years
Louisville Gas And Electric Co [Member] \| Financial Guarantee [Member] \| LGE And KU Guarantee Of Shortfall Related To OVEC [Member]
Guarantor Obligations [Line Items]
Maximum exposure is not estimable			The maximum exposure and the expiration date of these potential obligations are not presently determinable
Contingent proportionate share of OVEC's outstanding debt			$ 73
Kentucky Utilities Co [Member]
Other Guarantee (Numeric) [Abstract]
Collective Bargaining Agreement Term		3 years
Kentucky Utilities Co [Member] \| Financial Guarantee [Member] \| LGE And KU Guarantee Of Shortfall Related To OVEC [Member]
Guarantor Obligations [Line Items]
Maximum exposure is not estimable			The maximum exposure and the expiration date of these potential obligations are not presently determinable
Contingent proportionate share of OVEC's outstanding debt			$ 32