Name:	ppl_AmountRegulatoryAssetEstablished
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Amount of regulatory liability previously recorded reversed.

No definition available.

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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

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

No definition available.

Name:	ppl_PeriodStormCostsRecovered
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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Percentage of public utility's authorized return on equity to be utilized in the environmental cost recovery and gas line tracker mechanisms under a settlement agreement.

No definition available.

Name:	ppl_PublicUtilitiesAuthorizedReturnOnEquityPercentageEnvironmentalCostRecoveryAndGasLineTracker
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Current percentage of billed revenues allowable for the distribution system improvement charge.

No definition available.

Name:	ppl_PublicUtilitiesDistributionSystemImprovementChargeCurrentPercentage
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Requested percentage of billed revenues allowable for the distribution system improvement charge for services rendered after January 1, 2016.

No definition available.

Name:	ppl_PublicUtilitiesDistributionSystemImprovementChargeRequestedPercentage
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Number of years, over which pension costs associated with amortization of actuarial gains and losses will be recovered under a settlement agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	ppl_PublicUtilitiesPensionCostsRecoveryPeriod
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Number of years, over which deferred costs associated with Green River Units 3 and 4 will be recovered under a settlement agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	ppl_PublicUtilitiesPlantCostsRecoveryPeriod
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Data Type:	xbrli:durationItemType
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
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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

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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

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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

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

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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

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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

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Period Type:	instant

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

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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.

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

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Namespace Prefix:
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