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Number of employees who voluntary accepted a one-time window to retire early under the terms of a labor agreement.

No definition available.

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The amount of increase related to special termination benefits offered to and accepted by employees in connection with their termination of employment that are only offered for a short period of time. A situation involving termination benefits may also involve a curtailment.

No definition available.

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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.

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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.

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

No definition available.

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Data Type:	xbrli:integerItemType
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The percentage reduction in greenhouse gas emissions below 2005 levels by 2020 per the Climate Action Plan.

No definition available.

Name:	ppl_GreenhouseGasEmissionsReductionInEmissionsBelow2005LevelsPercentage
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Data Type:	num:percentItemType
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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.

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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.

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Data Type:	xbrli:monetaryItemType
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Maximum property insurance coverage for the company's nuclear station.

No definition available.

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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.

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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
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Data Type:	xbrli:monetaryItemType
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Number of states in a coalition that is requesting the Supreme Court to review the Environemental Protection Agency's final rule on Mercury and Air Toxic Standards.

No definition available.

Name:	ppl_MercuryAndAirToxicsNumberStatesRequestingReview
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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
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Data Type:	xbrli:integerItemType
Balance Type:	na
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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.

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Data Type:	xbrli:integerItemType
Balance Type:	na
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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
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Data Type:	xbrli:integerItemType
Balance Type:	na
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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
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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
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A proposed New Jersey renewable energy portfolio standard attainment percentage from Class I sources by 2020.

No definition available.

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

No definition available.

Name:	ppl_RenewableEnergyLegislationProgramFundingTotal
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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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
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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
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Data Type:	num:weightItemType
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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.

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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
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Data Type:	xbrli:integerItemType
Balance Type:	na
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If applicable, the cost of providing special or contractual termination benefits recognized during the period on the projected benefit obligation.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (q)

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Period expense related to postemployment benefits.

No definition available.

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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