Name:	ppl_CoalCombustionResidualIntentToSueNumberOfCompanies
Namespace Prefix:	ppl_
Data Type:	xbrli:integerItemType
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_EnvironmentalMattersDomesticAirCrossStateAirPollutionRuleFormerlyCleanAirTransportRuleAndCleanAirInterstateRuleNumericAbstract
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_EnvironmentalMattersDomesticAirNationalAmbientAirQualityStandardsAbstract
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_EnvironmentalMattersDomesticWaterWasteCleanWaterAct316BNumericAbstract
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 factors to consider, including impacts to energy reliability and remaining useful life of plants, when making a site-specific determination using a form of cost-benefit analysis of environmental standards regarding the impact to aquatic organisms of cooling towers.

No definition available.

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

Number of requirements under proposed Environmental Protection Agency rule regarding reducing impact to aquatic organisms of cooling towers.

No definition available.

Name:	ppl_EnvironmentalProtectionRuleOnImpactOfCoolingTowersOnAquaticOrganisms
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 approaches proposed by the EPA in June 2010 to regulate the disposal and management of coal combustion residuals under the Resource Conservation and Recovery Act.

No definition available.

Name:	ppl_NumberOfApproachesProposedByEnvironmentalProtectionAgencyToRegulateCoalCombustionResidualsJune2010
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

Number of northeastern states that signed a Memorandum of Understanding that established a greenhouse gas emission cap-and-trade program called the Regional Greenhouse Gas Initiative.

No definition available.

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

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

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

Percentage reduction by 2019 in carbon dioxide emissions from base 2005 levels under the Regional Greenhouse Gas Initiative's January 2009 program.

No definition available.

Name:	ppl_PercentageReductionCarbonDioxideFromBaseBy2019PerRegionalGreenhouseGasInitiative
Namespace Prefix:	ppl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Maximum percentage reduction by 2020 in greenhouse gas emissions that could be achieved by implementing actions identified in Pennsylvania's Advisory Committee's Climate Change Action Report.

No definition available.

Name:	ppl_PercentageReductionGreenhouseGasBy2020PerPennsylvaniaAdvisoryClimateChangeActionReport
Namespace Prefix:	ppl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

A proposed Maryland renewable energy portfolio standard percentage.

No definition available.

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

The current Maryland renewable energy portfolio standard percentage.

No definition available.

Name:	ppl_RenewableEnergyLegislationMarylandEnergyPortfolioStandard
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 2020.

No definition available.

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

Amount of proposed funding under a renewable energy program for solar projects.

No definition available.

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

Estimate by the United States Government of the "social cost of carbon", per metric ton, in 2015 used to calculate benefits associated with proposed regulations.

No definition available.

Name:	ppl_SocialCostOfCarbonPerMetricTonIn2015
Namespace Prefix:	ppl_
Data Type:	num:weightItemType
Balance Type:	na
Period Type:	duration

Estimate by the United States Government of the "social cost of carbon", per metric ton, prior to 2015 used to calculate benefits associated with proposed regulations.

No definition available.

Name:	ppl_SocialCostOfCarbonPerMetricTonPriorTo2015
Namespace Prefix:	ppl_
Data Type:	num:weightItemType
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:integerItemType
Balance Type:	na
Period Type:	duration

Standard, in hours, for sulfur dioxide emissions finalized by the EPS.

No definition available.

Name:	ppl_SulfurDioxideEmissionsStandard
Namespace Prefix:	ppl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Minimum capacity (in MW) of electric power plants that are required to stabilize carbon dioxide emissions to base 2005 levels under the Regional Greenhouse Gas Initiative's January 2009 program.

No definition available.

Name:	ppl_ThresholdCapacityOfElectricPowerPlantsUnderMemorandumOfUnderstandingEstablishingRegionalGreenhouseGasInitiative
Namespace Prefix:	ppl_
Data Type:	num:powerItemType
Balance Type:	na
Period Type:	duration

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 13

-Subparagraph a

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

-Article 7