Name:	ppl_AmountRegulatoryAssetEstablished
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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

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

Time period, in days, requested to hold further proceedings in abeyance related to a previously filed Certificate of Public Convenience and Necessity application.

No definition available.

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

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

Name:	ppl_RegulatoryMattersKentuckyActivitiesCertificateOfPublicConvenienceNecessityFilingNumericAbstract
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_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_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

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 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

The amortization period for recovery of the individual regulatory noncurrent asset in a schedule of regulatory noncurrent assets.

No definition available.