Name:	ppl_AmountRegulatoryAssetEstablished
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of regulatory liability previously recorded reversed.

No definition available.

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

Maximum number of years the cost of new smart meters installed in compliance with ACT 129 can be depreciated.

No definition available.

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

Maximum term of long-term contracts for PLR supply allowed under Act 129.

No definition available.

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

The maximum percentage of PLR supply that long-term electric generation supply contracts are limited to under Act 129.

No definition available.

Name:	ppl_MaximumPercentageOfLongTermContractsForElectricGenerationSupplyService
Namespace Prefix:	ppl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Minimum term of long-term contracts for PLR supply allowed under Act 129.

No definition available.

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

Number of phases in the Pennsylvania Public Utility Commission investigation into the retail electricity market.

No definition available.

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

The period over which storm costs will be recovered (in years).

No definition available.

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

Percentage of public utility's requested return on equity in settlement agreement with certain wholesale customers.

No definition available.

Name:	ppl_PublicUtilitiesRequestedReturnOnEquityWholesaleCustomers
Namespace Prefix:	ppl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The number of specific alternative ratemaking mechanisms authorized by state legislation for approval by a state regulatory authority to provide more timely recovery of a utility's costs.

No definition available.

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

The credit to the statement of income for adjustments to the related to distribution price control review four line loss liability.

No definition available.

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

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

The maximum term, in years, Act 11 requires utilities to file a Long Term Infrastructure Improvement Plan as a prerequisite to filing for recovery through the distribution system improvement charge.

No definition available.

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

The minimum term, in years, Act 11 requires utilities to file a Long Term Infrastructure Improvement Plan as a prerequisite to filing for recovery through the distribution system improvement charge.

No definition available.

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

The number of issues assigned to the administrative law judge by the Pennsylvania Public Utility Commission for hearing and preparation of a recommended decision.

No definition available.

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

Number of municipalities that agreed settlement terms of rate change request. Final agreement pending approval with the Federal Energy Regulatory Commission.

No definition available.

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

Number of municipalities that submitted notice of termination under wholesale requirements contracts, effective in 2019.

No definition available.

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

Number of municipalities that submitted notice of termination under wholesale requirements contracts, effective in 2017.

No definition available.

Name:	ppl_RegulatoryMattersNumberOfMunicipalitiesSubmittedTerminationNotices2017
Namespace Prefix:	ppl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Name:	ppl_RegulatoryMattersPennsylvaniaActivitiesAct129NumericAbstract
Namespace Prefix:	ppl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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

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

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

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

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

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

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

The number of customers that would be impacted by a request to adjust the Federal Energy Regulatory Commission formula rates.

No definition available.

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

Projected cost of project to replace current meters with advanced meters that meet Pennsylvania Act 129 requirements.

No definition available.

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

The total amount of costs incurred to restore service that were recorded in the statement of income during the period.

No definition available.

Name:	ppl_StormRestorationCostsRecordedToStatementOfIncome
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The total amount recorded during the period for probable insurance recoveries that were recorded to the statement of income by the regulated utility. The recoveries include amounts that eliminate during consolidation to the parent.

No definition available.

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

The total amount of costs incurred to restore service during the period. These costs were either recorded to the statement of income or as a reduction to capital expenditures recorded to property plant and equipment.

No definition available.

Name:	ppl_TotalStormRestorationCosts
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Name:	us-gaap_InsuranceRecoveries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of loss contingency liability.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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

Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

Name:	us-gaap_LossContingencyAccrualProvision
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Percentage of public utility's approved return on equity.

No definition available.

Name:	us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Amount of public utility's requested rate increase (decrease) with regulatory agency.

No definition available.

Name:	us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Percentage of public utility's requested rate increase (decrease) with regulatory agency.

No definition available.

Name:	us-gaap_PublicUtilitiesRequestedRateIncreaseDecreasePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Percentage of public utility's requested return on equity.

No definition available.

Name:	us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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

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

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

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

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

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