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

Minimum range, in years, for completion of commencement or closure activities under certain triggering events for covered coal combustion residuals impoundments and landfills.

No definition available.

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

The period (in years) that a subsidiary is to provide Montana Department of Environmental Quality financial assurance on waste-water treatment facilities per the Administrative Order on Consent.

No definition available.

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

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

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

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

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

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

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

The number of coal-fired generating units retired at the Cane Run plant.

No definition available.

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

The percentage reduction in greenhouse gas emissions below 2005 levels by 2020 per the Climate Action Plan.

No definition available.

Name:	ppl_GreenhouseGasEmissionsReductionInEmissionsBelow2005LevelsPercentage
Namespace Prefix:	ppl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The company's maximum amount that could be assessed resulting from an incident at its nuclear station covered by Price-Anderson Act Amendments under the Energy Policy Act of 2005.

No definition available.

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

The company's maximum public liability for claims resulting from an incident at its nuclear station covered by Provisions of The Price-Anderson Act Amendments under the Energy Policy Act of 2005.

No definition available.

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

Maximum property insurance coverage for the company's nuclear station.

No definition available.

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

Maximum amount payable per year that company would have to pay resulting from an incident at its nuclear station covered by the Price-Anderson Act Amendments under the Energy Policy Act of 2005.

No definition available.

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

Maximum assessment of retroactive premiums the company could be assessed in the event of insurers' loss under property and replacement power insurance programs for coverage for the cost of replacement power during prolonged outages of nuclear units under certain specified conditions.

No definition available.

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

The number of companies that were cited in a federal district court filing related to a greenhouse gas litigation.

No definition available.

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

Number of electric utility companies that could be sued as a result of their greenhouse gas emissions based on a September 2009 U.S. Court of Appeals for the Second Circuit decision.

No definition available.

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

The number of indirect subsidaries that were cited in a federal district court filing related to a greenhouse gas litigation.

No definition available.

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

The number of phases that Cross State Air Pollution Rule will be implemented in.

No definition available.

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

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

A proposed New Jersey renewable energy portfolio standard attainment percentage from Class I sources by 2020.

No definition available.

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

A proposed New Jersey renewable energy portfolio standard attainment percentage from Class I sources by 2050.

No definition available.

Name:	ppl_RenewableEnergyLegislationNewJerseyEnergyPortfolioProposedStandardBy2050
Namespace Prefix:	ppl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Statutory period (after final order) for compliance with mercury and air toxics standards for mercury emissions and other hazardous air pollutants from electric generating units (in years).

No definition available.

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

Statutory period, in years, after compliance deadline that an extension to comply with mercury and air toxics standards for mercury emissions and other hazardous air pollutants from electric generating units could be requested.

No definition available.

Name:	ppl_StatutoryPeriodAfterOrderForExtensionWithMercuryAndAirToxicsStandards
Namespace Prefix:	ppl_
Data Type:	xbrli:stringItemType
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: