Name:	ppl_AmountForClaimsRemainingAgainstCompanyForSpotMarketBilateralSales
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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Capacity (in MW) of natural gas-fired combined-cycle generating facility to be owned by CPV Maryland, LLC.

No definition available.

Name:	ppl_CapacityOfNaturalGasFiredCombinedCycleGeneratingFacility
Namespace Prefix:	ppl_
Data Type:	num:powerItemType
Balance Type:	na
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Frequency of competitive solicitations each plan year beginning in April 2013 to procure electricity.

No definition available.

Name:	ppl_CompetitiveSolicitationsFrequencyEachPlanYear
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Longest term, in months, of layered short-term full requirements products for residential and small commercial and industrial provider of last resort customers.

No definition available.

Name:	ppl_CompetitiveSolicitationsLongestTermOfProducts
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Data Type:	xbrli:integerItemType
Balance Type:	na
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Number of competitive solicitations completed to date related to the Public Utility Commission approved purchase plan for provider of last resort supply for the period June 2013 through May 2015.

No definition available.

Name:	ppl_CompetitiveSolicitationsNumberCompleted
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Balance Type:	na
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Recurring term, in months, of spot market product for large commercial and industrial provider of last resort customers.

No definition available.

Name:	ppl_CompetitiveSolicitationsRecurringTermOfSpotMarketProduct
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Data Type:	xbrli:integerItemType
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Shortest term, in months, of layered short-term full requirements products for residential and small commercial and industrial provider of last resort customers.

No definition available.

Name:	ppl_CompetitiveSolicitationsShortestTermOfProducts
Namespace Prefix:	ppl_
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Total number of competitive solicitations related to the Public Utility Commission approved purchase plan for provider of last resort supply for the period June 2013 through May 2015.

No definition available.

Name:	ppl_CompetitiveSolicitationsTotalNumber
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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Name:	ppl_EnergyPurchaseCommitmentsNumericAbstract
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Data Type:	xbrli:stringItemType
Balance Type:	na
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At period end, the minimum remaining commitment under the Memoranda of Understanding related to the issuance of the renewal license for Missouri-Madison Dam project in Montana to fund programs to mitigate the impact on fish, wildlife and their habitats and to increase recreational programs.

No definition available.

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

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

Period of years from December 1998 that the company was required to respond to the FERC with market analysis information after implementing market-based rates.

No definition available.

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

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

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

Name:	ppl_LegalMattersSierraClubLitigationNumericAbstract
Namespace Prefix:	ppl_
Data Type:	xbrli:stringItemType
Balance Type:	na
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Pre-tax gain (loss) incurred for modifications to the long-term purchase commitment.

No definition available.

Name:	ppl_LongTermPurchaseCommitmentModificationCharges
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

After-tax accrual reversal regarding the company's use of navigable riverbeds in Montana that impacted interest expense. After a Supreme Court action, the reversal of prior amounts were reversed.

No definition available.

Name:	ppl_LossContingencyAfterTaxLossAccrualReversalImpactToInterestExpense
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

After-tax accrual reversal regarding the company's use of navigable riverbeds in Montana that impacted other operation and maintence expense. After a Supreme Court action, the reversal of prior amounts were reversed.

No definition available.

Name:	ppl_LossContingencyAfterTaxLossAccrualReversalImpactToOtherOperationMaintenance
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The average amount, per day per violation, of injuctive relief and civil penalities in the complaint.

No definition available.

Name:	ppl_LossContingencyCivilPenaltyAmountPerDayPerViolation
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The total amount of civil penalities in the complaint to be used for beneficial mitigation projects.

No definition available.

Name:	ppl_LossContingencyCivilPenaltyAmountUsedForBeneficialProjects
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The increase in the number of projects included in litigation as a result of an additional notice filing.

No definition available.

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

The total amount of original pending claims pertaining to a loss contingency.

No definition available.

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

The number of original claims pertaining to a loss contingency that did not allege Prevention of Significant Deterioation related to voilations under the federal Clean Air Act. These claims alledge failure to update the Title V operating permit.

No definition available.

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

The settlement amount reached by both parties for spot market bilateral sales made in the Pacific Northeast.

No definition available.

Name:	ppl_LossContingencySettlementValue
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of civil penalties that can be assessed by the FERC under the Federal Power Act per day, per violation, for certain violations.

No definition available.

Name:	ppl_MaximumPerDayPenaltyFederalEnergyRegulatoryCommissionMayAssessUnderReliabilityStandards
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Number of electric utilities ordered by the Maryland Public Service Commission to enter into long-term contracts to support construction of new electric generating facilities.

No definition available.

Name:	ppl_NumberElectricUtilitiesOrderedToEnterIntoLongTermContracts
Namespace Prefix:	ppl_
Data Type:	xbrli:integerItemType
Balance Type:	na
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At period end, number of hydroelectric facilities owned and operated by the company in Montana.

No definition available.

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

Number of dams related to Missouri-Madison Dam project for which Memoranda of Understanding exists in Montana.

No definition available.

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

Number of hydroelectric facilities to be sold by PPL Montana.

No definition available.

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

Number of Memoranda of Understanding related to the issuance of the renewal license for Missouri-Madison Dam project In Montana.

No definition available.

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

At period end, number of storage reservoirs owned by the company in Montana.

No definition available.

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

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

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

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

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

Name:	ppl_SettledLitigationSpentNuclearFuelLitigationNumericAbstract
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Represents the company's share of the settlement for litigation related to the U.S. government's responsibility to provide for the permanent disposal of commercial spent nuclear fuel. The settlement is in lieu of the government providing a repository site for reimbursement to a company's subsidiary costs incurred to store spent nuclear fuel through September 30, 2009. In addition, the agreement provides the ability to receive payment of annual claims for allowed costs, as set forth in the settlement agreement, that are incurred thereafter through the December 31, 2013 termination date of the settlement agreement.

No definition available.

Name:	ppl_SpentNuclearFuelLitigationSettlementProceeds
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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Frequency (in years), after initial filing, that the company is required to respond to the FERC with market analysis information after implementing market-based rates.

No definition available.

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

The term, in years, the company is required to operate the Kerr Dam project in Montana.

No definition available.

Name:	ppl_TermCompanyRequiredToOperateKerrDamProject
Namespace Prefix:	ppl_
Data Type:	xbrli:integerItemType
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Total term, in years, of Kerr Dam project license in Montana.

No definition available.

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

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 4

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5074-111524

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.4)

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

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Amount of bankruptcy claim filed with bankruptcy court.

No definition available.

Name:	us-gaap_BankruptcyClaimsAmountOfClaimsFiled
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fifth fiscal year following the latest fiscal year.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 440

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308

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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the next fiscal year following the latest fiscal year.

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Namespace Prefix:	us-gaap_
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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the four fiscal year following the latest fiscal year.

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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the second fiscal year following the latest fiscal year.

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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the third fiscal year following the latest fiscal year.

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Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing after the fifth fiscal year following the latest fiscal year.

Name:	us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears
Namespace Prefix:	us-gaap_
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Name:	us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems
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The amount purchased during the period under an unrecorded unconditional purchase obligation (for example, under the take-or-pay or throughput contract).

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 440

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308