XML 123 R84.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Retirement and Postemployment Benefits (Savings Plans and Employee Stock Ownership Plan) (Details) - Deferred Savings Plans 401K [Member] - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Defined Contribution Pension And Other Postretirement Plans [Line Items] |  |  |
Employer contributions to deferred savings plans | $ 40 | $ 36 | $ 35
PPL Electric Utilities Corp [Member] |  |  |
Defined Contribution Pension And Other Postretirement Plans [Line Items] |  |  |
Employer contributions to deferred savings plans | 6 | 6 | 6
LG And E And KU Energy LLC [Member] |  |  |
Defined Contribution Pension And Other Postretirement Plans [Line Items] |  |  |
Employer contributions to deferred savings plans | 20 | 18 | 17
Louisville Gas And Electric Co [Member] |  |  |
Defined Contribution Pension And Other Postretirement Plans [Line Items] |  |  |
Employer contributions to deferred savings plans | 6 | 5 | 5
Kentucky Utilities Co [Member] |  |  |
Defined Contribution Pension And Other Postretirement Plans [Line Items] |  |  |
Employer contributions to deferred savings plans | $ 5 | $ 4 | $ 4

X
- References No definition available. + Details
Name: | ppl_DefinedContributionPensionAndOtherPostretirementPlansLineItems
Namespace Prefix: | ppl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement. + References No definition available. + Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ppl_DefinedContributionPensionAndOtherPostretirementPlansAxis=ppl_DeferredSavingsPlans401kMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | dei_LegalEntityAxis=ppl_LGAndEAndKUEnergyLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ppl_LouisvilleGasAndElectricCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ppl_KentuckyUtilitiesCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |