The expiration date of the guarantee or group of similar guarantees.

No definition available.

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- Definition

The maximum exposure of a guarantee related to the termination of a lease related to certain non-utility generating stations in western Kentucky until July 2009. This portion of the guarantee relates to covering operational, regulatory and environmental commitments and indemnifications made under the agreement.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The maximum exposure of other guarantees related to a subsidiary that leased certain non-utility generating stations in western Kentucky until July 2009 not defined earlier.

+ References

No definition available.

+ Details

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

- Definition

Maximum aggregate insurance coverage for liability assumed under contract for bodily injury and property damage.

+ References

No definition available.

+ Details

Name:	ppl_MaximumAggregateCoverageBodilyInjuryAndPropertyDamage
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The maximum period, in years, that indemnifications related to the dissolution of entities generally expire after the date of dissolution.

+ References

No definition available.

+ Details

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

- Definition

The minimum period, in years, that indemnifications related to the dissolution of entities generally expire after the date of dissolution.

+ References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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

- Definition

Entity's contingent proportionate share of OVEC's outstanding debt.

+ References

No definition available.

+ Details

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

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

States the reasons why the guarantor is unable to develop an estimate of the maximum potential amount of future payments under its guarantee (or each group of similar guarantees).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248

+ Details

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

- Definition

Describe the approximate term of the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248

+ Details

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

- Details

Name:	ppl_GuaranteeByEntityAxis=ppl_PplGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=us-gaap_IndemnificationGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_GuaranteeByDescriptionAxis=ppl_IndemnificationsRelatedToWpdMidlandsAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_GuaranteeByDescriptionAxis=ppl_IndemnificationsForEntitiesInLiquidationSalesOfAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=us-gaap_FinancialGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_GuaranteeByDescriptionAxis=ppl_WpdGuaranteeOfPensionAndOtherObligationsOfUnconsolidatedEntitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_GuaranteeByEntityAxis=ppl_PplElectricGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_GuaranteeByDescriptionAxis=ppl_GuaranteeOfInventoryValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_GuaranteeByEntityAxis=ppl_LouisvilleGasAndElectricAndKuEnergyGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_GuaranteeByDescriptionAxis=ppl_IndemnificationsIssuedByLkeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_GuaranteeByEntityAxis=ppl_LouisvilleGasAndElectricCompanyAndKentuckyUtilitiesGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ppl_GuaranteeByDescriptionAxis=ppl_GuaranteeForShortfallRelatedToOhioValleyElectricCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=ppl_PplElectricUtilitiesCorpMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	dei_LegalEntityAxis=ppl_LGAndEAndKUEnergyLLCMember
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- Details

Name:	dei_LegalEntityAxis=ppl_LouisvilleGasAndElectricCoMember
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- Details

Name:	dei_LegalEntityAxis=ppl_KentuckyUtilitiesCoMember
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Commitments and Contingencies (Guarantees and Other Assurances) (Details) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2018	Dec. 31, 2017 USD ($) Integer	Dec. 31, 2016 USD ($)
Guarantor Obligations [Line Items]
Recorded liability for all guarantees		$ 17	$ 22
Other Guarantee (Numeric) [Abstract]
Maximum aggregate coverage bodily injury and property damage		$ 225
PPL Guarantee [Member] \| Indemnification Guarantee [Member] \| Indemnifications Related To WPD Midlands Acquisition [Member]
Guarantor Obligations [Line Items]
Maximum exposure is not estimateable		The maximum exposure and expiration of these indemnifications cannot be estimated because the maximum potential liability is not capped and the expiration date is not specified in the transaction documents.
PPL Guarantee [Member] \| Indemnification Guarantee [Member] \| WPD Indemnifications For Entities In Liquidation Sales Of Assets [Member]
Guarantor Obligations [Line Items]
Maximum exposure		$ 11
Expiration date		2020
Minimum period that indemnifications generally expire (in years) \| Integer		2
Maximum period that indemnifications generally expire (in years) \| Integer		7
PPL Guarantee [Member] \| Financial Guarantee [Member] \| WPD Guarantee Of Pension And Other Obligations Of Unconsolidated Entities [Member]
Guarantor Obligations [Line Items]
Maximum exposure		$ 95
PPL Electric Guarantee [Member] \| Indemnification Guarantee [Member] \| Guarantee Of Inventory Value [Member]
Guarantor Obligations [Line Items]
Maximum exposure		$ 16
Expiration date		2018
PPL Electric Guarantee [Member] \| Indemnification Guarantee [Member] \| Guarantee Of Inventory Value [Member] \| Subsequent Event [Member]
Guarantor Obligations [Line Items]
Expiration date	2020
LKE Guarantee [Member] \| Indemnification Guarantee [Member] \| Indemnification Of Lease Termination And Other Divestitures [Member]
Guarantor Obligations [Line Items]
Maximum exposure		$ 201
Term of guarantee (in years)		12 years
Maximum exposure of guarantee related to terminated lease specific to operational, regulatory and environmental issues		$ 200
Maximum exposure of other guarantees expiring related to a terminated lease		$ 100
LKE Guarantee [Member] \| Indemnification Guarantee [Member] \| Indemnification Of Lease Termination And Other Divestitures [Member] \| Minimum [Member]
Guarantor Obligations [Line Items]
Expiration date		2021
LKE Guarantee [Member] \| Indemnification Guarantee [Member] \| Indemnification Of Lease Termination And Other Divestitures [Member] \| Maximum [Member]
Guarantor Obligations [Line Items]
Expiration date		2023
LGE And KU Guarantee [Member] \| Financial Guarantee [Member] \| LGE And KU Guarantee Of Shortfall Related To OVEC [Member]
Guarantor Obligations [Line Items]
Maximum exposure is not estimateable		The maximum exposure and the expiration date of these potential obligations are not presently determinable.
Contingent potential proportionate share of OVEC's outstanding debt		$ 117
PPL Electric Utilities Corp [Member] \| Indemnification Guarantee [Member] \| Guarantee Of Inventory Value [Member]
Guarantor Obligations [Line Items]
Maximum exposure		$ 16
Expiration date		2018
PPL Electric Utilities Corp [Member] \| Indemnification Guarantee [Member] \| Guarantee Of Inventory Value [Member] \| Subsequent Event [Member]
Guarantor Obligations [Line Items]
Expiration date	2020
LG And E And KU Energy LLC [Member]
Guarantor Obligations [Line Items]
Recorded liability for all guarantees		$ 11	$ 17
LG And E And KU Energy LLC [Member] \| Indemnification Guarantee [Member] \| Indemnification Of Lease Termination And Other Divestitures [Member]
Guarantor Obligations [Line Items]
Maximum exposure		$ 201
Term of guarantee (in years)		12 years
Maximum exposure of guarantee related to terminated lease specific to operational, regulatory and environmental issues		$ 200
Maximum exposure of other guarantees expiring related to a terminated lease		$ 100
LG And E And KU Energy LLC [Member] \| Indemnification Guarantee [Member] \| Indemnification Of Lease Termination And Other Divestitures [Member] \| Minimum [Member]
Guarantor Obligations [Line Items]
Expiration date		2021
LG And E And KU Energy LLC [Member] \| Indemnification Guarantee [Member] \| Indemnification Of Lease Termination And Other Divestitures [Member] \| Maximum [Member]
Guarantor Obligations [Line Items]
Expiration date		2023
LG And E And KU Energy LLC [Member] \| Financial Guarantee [Member] \| LGE And KU Guarantee Of Shortfall Related To OVEC [Member]
Guarantor Obligations [Line Items]
Contingent potential proportionate share of OVEC's outstanding debt		$ 117
Louisville Gas And Electric Co [Member] \| LGE And KU Guarantee [Member] \| Financial Guarantee [Member] \| LGE And KU Guarantee Of Shortfall Related To OVEC [Member]
Guarantor Obligations [Line Items]
Contingent potential proportionate share of OVEC's outstanding debt		81
Kentucky Utilities Co [Member] \| LGE And KU Guarantee [Member] \| Financial Guarantee [Member] \| LGE And KU Guarantee Of Shortfall Related To OVEC [Member]
Guarantor Obligations [Line Items]
Contingent potential proportionate share of OVEC's outstanding debt		$ 36