Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

The high end of the range of time remaining until maturity when a range is presented for a group of derivatives.

+ References

No definition available.

+ Details

Name:	ppl_DerivativeHigherRemainingMaturityRange2
Namespace Prefix:	ppl_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	instant

- Definition

Disclosure of an assertion that the amount of net gain (loss) reclassified into earnings in the period when cash flow hedge is discontinued because it is probable that the original forecasted transactions will not occur by the end of the original period or an additional two month time period is insignificant or none.

+ References

No definition available.

+ Details

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

- Details

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

- Details

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

- Details

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

- Definition

Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments.

+ References

No definition available.

+ Details

Name:	ppl_MaximumLengthOfTimeHedgedInInterestRateCashFlowHedge2
Namespace Prefix:	ppl_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum maturity date for interest rate swap contracts hedging interest payments on variable rate debt classifed as economic activity.

+ References

No definition available.

+ Details

Name:	ppl_MaximumLengthOfTimeHedgedInInterestRateEconomicActivityHedge
Namespace Prefix:	ppl_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

- Definition

The latest settlement date of net investment hedge contracts outstanding.

+ References

No definition available.

+ Details

Name:	ppl_MaximumSettlementDateNetInvestmentHedges
Namespace Prefix:	ppl_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

- Definition

The latest termination date of foreign currency contracts classified as economic activity outstanding.

+ References

No definition available.

+ Details

Name:	ppl_MaximumTerminationDateNetInvestmentHedgesClassifiedAsEconomicActivity
Namespace Prefix:	ppl_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

- Definition

The earliest settlement date of net investment hedge contracts outstanding.

+ References

No definition available.

+ Details

Name:	ppl_MinimumSettlementDateNetInvestmentHedges
Namespace Prefix:	ppl_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

- Definition

The earliest termination date of foreign currency contracts for anticipated earnings hedges classified as economic activity outstanding.

+ References

No definition available.

+ Details

Name:	ppl_MinimumTerminationDateNetInvestmentHedgesClassifiedAsEconomicActivity
Namespace Prefix:	ppl_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from a financial contract that meets the hedge criteria as either cash flow hedge, fair value hedge or hedge of net investment in foreign operations, classified as operating activiites.

+ References

No definition available.

+ Details

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

- Definition

Total exposure hedged through a combination of average rate forwards and average rate options foreign currency contracts for anticipated earnings hedges classified as economic activity.

+ References

No definition available.

+ Details

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

- Definition

A disclosure of an assertion that the current period adjustment in other comprehensive income reflecting gains (losses) on foreign currency transactions that are designated as, and are effective as, hedges of a net investment in a foreign entity, net of tax effect is insignificant or none.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80748-113994

+ Details

Name:	us-gaap_InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Disclosure of an assertion that the amount of interest rate cash flow hedge ineffectiveness is immaterial.

+ References

No definition available.

+ Details

Name:	us-gaap_InterestRateCashFlowHedgeIneffectivenessIsImmaterial
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal or face amount used to calculate payments on a nonderivative instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_NotionalAmountOfNonderivativeInstruments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_SummaryOfNetInvestmentHedgeActivityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Current period adjustment in other comprehensive income reflecting gains or losses on foreign currency transactions that are designated as, and are effective as, hedges of a net investment in a foreign entity, net of tax effect.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 30

-Section 45

-Paragraph 20

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959

+ Details

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

- Definition

Cumulative adjustment resulting from gains and losses on foreign currency derivatives that are designated as, and are effective as, hedges of a net investment in a foreign entity, commencing as of the designation date. Adjustment reported in equity as part of accumulated other comprehensive income.

+ References

+ Details

Name:	us-gaap_TranslationAdjustmentForNetInvestmentHedgeNetOfTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Derivative Instruments and Hedging Activities (Risk Disclosures) (Details)	3 Months Ended	9 Months Ended								9 Months Ended					9 Months Ended				9 Months Ended				9 Months Ended
	Sep. 30, 2013 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2013 GBP (£)	Dec. 31, 2012 USD ($)	Sep. 30, 2013 Cash Flow Hedges [Member] Interest Rate Swap Contracts [Member] USD ($)	Sep. 30, 2013 Cash Flow Hedges [Member] Cross Currency Interest Rate Swaps [Member] USD ($)	Sep. 30, 2013 Economic Hedges [Member] Interest Rate Swap Contracts [Member] USD ($)	Sep. 30, 2013 Net Investment Hedges [Member] Foreign Currency Contracts [Member] USD ($)	Sep. 30, 2013 Net Investment Hedges [Member] Foreign Currency Contracts [Member] GBP (£)	Sep. 30, 2013 Net Investment Hedges [Member] Intercompany Loans [Member] USD ($)	Sep. 30, 2013 Net Investment Hedges [Member] Intercompany Loans [Member] GBP (£)	Sep. 30, 2013 WPD [Member]	Sep. 30, 2013 WPD [Member] Cash Flow Hedges [Member] Interest Rate Swap Contracts [Member] USD ($)	Sep. 30, 2013 WPD [Member] Cash Flow Hedges [Member] Interest Rate Swap Contracts [Member] GBP (£)	Sep. 30, 2013 LG And E And KU Energy LLC [Member] USD ($)	Sep. 30, 2012 LG And E And KU Energy LLC [Member] USD ($)	Sep. 30, 2013 LG And E And KU Energy LLC [Member] Cash Flow Hedges [Member] Interest Rate Swap Contracts [Member] USD ($)	Sep. 30, 2013 LG And E And KU Energy LLC [Member] Economic Hedges [Member] Interest Rate Swap Contracts [Member] USD ($)	Sep. 30, 2013 Louisville Gas And Electric Co [Member] USD ($)	Sep. 30, 2012 Louisville Gas And Electric Co [Member] USD ($)	Sep. 30, 2013 Louisville Gas And Electric Co [Member] Cash Flow Hedges [Member] Interest Rate Swap Contracts [Member] USD ($)	Sep. 30, 2013 Louisville Gas And Electric Co [Member] Economic Hedges [Member] Interest Rate Swap Contracts [Member] USD ($)	Sep. 30, 2013 Kentucky Utilities Co [Member] USD ($)	Sep. 30, 2012 Kentucky Utilities Co [Member] USD ($)	Sep. 30, 2013 Kentucky Utilities Co [Member] Cash Flow Hedges [Member] Interest Rate Swap Contracts [Member] USD ($)
Interest Rate Risk And Foreign Currency Risk [Line Items]
Notional amount					$ 2,300,000,000	$ 1,300,000,000	$ 179,000,000	$ 505,000,000	£ 320,000,000				$ 464,000,000	£ 300,000,000			$ 500,000,000	$ 179,000,000			$ 250,000,000	$ 179,000,000			$ 250,000,000
Notional amount of nonderivative instruments										119,000,000	77,000,000
Interest Rate Risk - Cash Flow Hedges (Numeric) [Abstract]
Year of expiration of the maximum maturity date of interest rate cash flow hedge contracts		2044										2024			2043				2043				2043
Latest maturity date of cross-currency cash flow hedge contracts	2028	2028
Insignificant or no hedge ineffectiveness associated with interest rate cash flow hedges		For the three and nine months ended September 30, 2013 and 2012, hedge ineffectiveness associated with interest rate derivatives was insignificant.
No or insignificant after-tax gains (losses) previously recorded in AOCI reclassified to earnings related to interest rate cash flow hedge contracts		PPL had no such reclassifications for the three and nine months ended September 30, 2013 and 2012.
Net unrealized after-tax gains (losses) on interest rate cash flow hedge contracts expected to be reclassified into earnings during next 12 months	(11,000,000)	(11,000,000)
Cash settlement on terminated swaps															98,000,000				49,000,000				49,000,000
Interest Rate Risk - Economic Activity (Numeric) [Abstract]
Year of expiration of the maximum maturity date of interest rate economic activity contracts		2033													2033				2033
Foreign Currency Risk - Net Investment Hedges (Numeric) [Abstract]
Earliest settlement date of net investment hedge contracts		November 2013
Latest settlement date of net investment hedge contracts		June 2015
Net after tax gains (losses) on net investment hedges recognized in the foreign currency translation adjustment component of AOCI	(9,000,000)	(3,000,000)
Insignificant or no net after tax gains (losses) on net investment hedges recognized in the foreign currency translation adjustment component of AOCI		Such amounts for the three and nine months ended September 30, 2012 were not significant.
Net after tax gains (losses) on net investment hedges included in the foreign currency translation adjustment component of AOCI	5,000,000	5,000,000		14,000,000
Foreign Currency Risk - Economic Activity (Numeric) [Abstract]
Total exposure hedged related to foreign currency contracts for anticipated earnings hedges classified as economic activity	$ 2,100,000,000	$ 2,100,000,000	£ 1,300,000,000
Earliest termination date of foreign currency contracts for anticipated earnings hedges classified as economic activity		October 2013
Latest termination date of foreign currency contracts for anticipated earnings hedges classified as economic activity		October 2015