XML 73 R51.htm IDEA: XBRL DOCUMENT
v3.20.2

Utility Rate Regulation - Regulatory Matters (Details) - USD ($) $ in Millions |  |  |  | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 29, 2020 | May 21, 2020 | Mar. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020
PPL Electric [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Public Utilities, Approved Return on Equity, Percentage |  | 11.18% |  |  |
Change in Net Income due to ROE Adjustment |  |  |  | $ 12 |
Proposed Return Of Equity From Complaint |  | 8.00% |  |  |
Amended Proposed Return On Equity From Complaint |  | 8.50% |  |  |
LKE [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |
Public Utilities Expected Capital Costs To Comply |  |  |  |  | $ 405
LGE [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Public Utilities, Requested Return on Equity, Percentage |  |  | 9.725% |  |
Public Utilities, Approved Return on Equity, Percentage | 9.20% |  |  |  |
KU [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Public Utilities, Requested Return on Equity, Percentage |  |  | 9.725% |  |
Public Utilities, Approved Return on Equity, Percentage | 9.20% |  |  |  |
PPL Electric Utilities Corp [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Public Utilities, Approved Return on Equity, Percentage |  | 11.18% |  |  |
Change in Net Income due to ROE Adjustment |  |  |  | $ 12 |
Proposed Return Of Equity From Complaint |  | 8.00% |  |  |
Amended Proposed Return On Equity From Complaint |  | 8.50% |  |  |
LG And E And KU Energy LLC [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |
Public Utilities Expected Capital Costs To Comply |  |  |  |  | 405
LG And E And KU Energy LLC [Member] | LGE [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |
Public Utilities Expected Capital Costs To Comply |  |  |  |  | 153
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Public Utilities, Requested Return on Equity, Percentage |  |  | 9.725% |  |
Public Utilities, Approved Return on Equity, Percentage | 9.20% |  |  |  |
LG And E And KU Energy LLC [Member] | KU [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |
Public Utilities Expected Capital Costs To Comply |  |  |  |  | 252
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Public Utilities, Requested Return on Equity, Percentage |  |  | 9.725% |  |
Public Utilities, Approved Return on Equity, Percentage | 9.20% |  |  |  |
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |
Public Utilities Expected Capital Costs To Comply |  |  |  |  | 153
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Public Utilities, Requested Return on Equity, Percentage |  |  | 9.725% |  |
Public Utilities, Approved Return on Equity, Percentage | 9.20% |  |  |  |
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |
Public Utilities Expected Capital Costs To Comply |  |  |  |  | $ 252
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Public Utilities, Requested Return on Equity, Percentage |  |  | 9.725% |  |
Public Utilities, Approved Return on Equity, Percentage | 9.20% |  |  |  |

X
- Definition Amended proposed return on equity from complaint + References No definition available. + Details
Name: | ppl_AmendedProposedReturnOnEquityFromComplaint
Namespace Prefix: | ppl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Change in Net Income due to ROE Adjustment - Max possible adjustment due to ROE challenge + References No definition available. + Details
Name: | ppl_ChangeInNetIncomeDueToROEAdjustment
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Proposed return on equity from complaint filed + References No definition available. + Details
Name: | ppl_ProposedReturnOfEquityFromComplaint
Namespace Prefix: | ppl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated amount of capitalized costs for construction projects. + References No definition available. + Details
Name: | ppl_PublicUtilitiesExpectedCapitalCostsToComply
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Regulatory Matters Kentucky Activities Rate Case Proceedings [Abstract] + References No definition available. + Details
Name: | ppl_RegulatoryMattersKentuckyActivitiesRateCaseProceedingsAbstract
Namespace Prefix: | ppl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Percentage of public utility's approved return on equity. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of public utility's requested return on equity. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ppl_ByCompanyAxis=ppl_PplElectricUtilitiesCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_ByCompanyAxis=ppl_LouisvilleGasAndElectricAndKentuckyUtilitiesEnergyLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAgencyAxis=ppl_KentuckyPublicServiceCommissionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_ScheduleOfRegulatoryItemsWithSharedCharacteristicsAxis=ppl_EnvironmentalCostRecoveryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_ByCompanyAxis=ppl_LouisvilleGasAndElectricCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_ByCompanyAxis=ppl_KentuckyUtilitiesCompanyMember
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: |