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Utility Rate Regulation (Regulatory Matters) (Details) $ in Millions |  |  |  |  |  |  |  | 3 Months Ended | 11 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 27, 2023 USD ($) | Dec. 23, 2022 USD ($) mi | Dec. 15, 2022 MW | Nov. 18, 2022 USD ($) | May 21, 2020 | Oct. 16, 2018 | Aug. 24, 2018 | Mar. 31, 2015 | Nov. 30, 2021 USD ($) | Dec. 31, 2022 USD ($) MW
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities, Power | MW |  |  | 621 |  |  |  |  |  |  |
CPCN Solar Photovoltaic Facility to be constructed, Power | MW |  |  | 120 |  |  |  |  |  |  |
CPCN Solar Photovoltaic Facility to be Acquired, Power | MW |  |  | 120 |  |  |  |  |  |  |
CPCN 4-Hour Battery Energy Storage Facility to be Constructed, Power | MW |  |  | 125 |  |  |  |  |  |  |
CPCN New and Adjusted Energy Efficiency Programs, Overall Power Need Reduction | MW |  |  | 100 |  |  |  |  |  |  |
Total Capacity of Power-Purchase Agreements Not Subject to KPSC Approval, Power | MW |  |  | 637 |  |  |  |  |  |  |
New NGCC LG&E Planned Ownership Percentage |  |  | 0.31 |  |  |  |  |  |  |
New Solar Units LG&E Planned Ownership Percentage |  |  | 0.37 |  |  |  |  |  |  |
New NGCC KU Planned Ownership Percentage |  |  | 0.69 |  |  |  |  |  |  |
New Solar Units KU Planned Ownership Percentage |  |  | 0.63 |  |  |  |  |  |  |
Mill Creek 1 Unit, Generation Capacity, Power | MW |  |  |  |  |  |  |  |  |  | 300
E. W. Brown 3 Unit, Generating Capacity, Power | MW |  |  |  |  |  |  |  |  |  | 412
Mill Creek 2 Unit, Generation Capacity, Power | MW |  |  |  |  |  |  |  |  |  | 297
Ghent 2 Unit, Generation Capacity, Power | MW |  |  |  |  |  |  |  |  |  | 486
LGE [Member] | Kentucky Public Service Commission [Member] |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |
Return on equity |  |  |  |  |  |  |  |  |  | 9.35%
LGE [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |
Amortization period for the deferred recovery of a regulatory asset |  |  |  |  |  |  |  |  |  | 12 months
KU [Member] | Kentucky Public Service Commission [Member] |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |
Return on equity |  |  |  |  |  |  |  |  |  | 9.35%
KU [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |
Amortization period for the deferred recovery of a regulatory asset |  |  |  |  |  |  |  |  |  | 12 months
PPL Electric Utilities Corp [Member] |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |
Return on equity |  |  |  |  | 11.18% |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Regulatory Liability due to ROE Reserve, After Tax |  |  |  |  |  |  |  |  | $ 55 |
PPL Electric Utilities Corp [Member] | Period of 05-21-2020 to 12-31-2020 |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Regulatory Liability due to ROE Reserve, Before Tax |  |  |  |  |  |  |  |  | 28 |
Regulatory Liability due to ROE Reserve, After Tax |  |  |  |  |  |  |  |  | 20 |
PPL Electric Utilities Corp [Member] | Period of 05-21-2020 to 11-30-2021 |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Regulatory Liability due to ROE Reserve, Before Tax |  |  |  |  |  |  |  |  | 73 |
Regulatory Liability due to ROE Reserve, After Tax |  |  |  |  |  |  |  |  | 52 |
Rhode Island Energy | Rhode Island Public Uitilty Commission |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |
Return on equity |  |  |  |  |  |  | 9.275% |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Estimated Net present value |  |  |  | $ 188 |  |  |  |  |  |
Net Present Value benefit of the AMF program |  |  |  | $ 729 |  |  |  |  |  |
Benefit-cost ratio yield of the AMF program |  |  |  | 3.90% |  |  |  |  |  |
Amount of capital Investment to spend on the Electrical ISR plan |  | $ 328 |  |  |  |  |  |  |  |
Capital Investment to spend on the FY 2024 Gas ISR Plan |  | 389 |  |  |  |  |  |  |  |
Capital Investment for the 2024 Gas ISR plan included in the GMP filing |  |  |  |  |  |  |  |  |  | $ 82
Amount of capital Investment to spend on the Electrical ISR plan |  | $ 328 |  |  |  |  |  |  |  |
Distance of Gas Piping to be Abandoned, FY 2024 Gas ISR, Miles | mi |  | 123 |  |  |  |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commission | Vegetation Management |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Amount of capital Investment to spend on the Electrical ISR plan |  | $ 24 |  |  |  |  |  |  |  |
Amount of capital Investment to spend on the Electrical ISR plan |  | 24 |  |  |  |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commission | Other O&M |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Amount of capital Investment to spend on the Electrical ISR plan |  | 6 |  |  |  |  |  |  |  |
Amount of capital Investment to spend on the Electrical ISR plan |  | $ 6 |  |  |  |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commission | Common equity percentage related to approved rate |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Percentage of common equity used on allowed ROE |  |  |  |  |  |  | 5100.00% |  |  |
Rhode Island Energy | Federal Energy Regulatory Commission |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Initial minimum base ROE to be reset by the FERC |  |  |  |  |  |  |  | 11.14% |  |
Minimum base ROE reset by FERC |  |  |  |  |  |  |  | 10.57% |  |
New ROE proposed by NETO and approved by FERC |  |  |  |  |  | 10.41% |  |  |  |
Maximum Base ROE reset by FERC |  |  |  |  |  |  |  | 11.74% |  |
Rhode Island Energy | Federal Energy Regulatory Commission | Amount remitted on the authorized ROE |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Amount of ROE remitted by NEP |  |  |  |  |  |  |  |  |  | $ 122
Rhode Island Energy | Federal Energy Regulatory Commission | Maximum ROE authorized |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
FERC Granted ROE |  |  |  |  |  |  |  |  |  | 11.74%
Rhode Island Energy | Subsequent Event [Member] | Rhode Island Public Uitilty Commission |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Supplemental Capital Investment to spend on the FY 2024 Gas ISR Plan | $ 187 |  |  |  |  |  |  |  |  |
Supplemental Capital Investment to spend on the FY 2024 Electrical ISR Plan | 176 |  |  |  |  |  |  |  |  |
Rhode Island Energy | Subsequent Event [Member] | Rhode Island Public Uitilty Commission | Vegetation Management |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Supplemental Capital Investment to spend on the FY 2024 Electrical ISR Plan | 14 |  |  |  |  |  |  |  |  |
Rhode Island Energy | Subsequent Event [Member] | Rhode Island Public Uitilty Commission | Other O&M |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Supplemental Capital Investment to spend on the FY 2024 Electrical ISR Plan | $ 3 |  |  |  |  |  |  |  |  |
PPL Electric Utilities Corp [Member] |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |
Return on equity |  |  |  |  | 11.18% |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Regulatory Liability due to ROE Reserve, Before Tax |  |  |  |  |  |  |  |  | 78 |
Regulatory Liability due to ROE Reserve, After Tax |  |  |  |  |  |  |  |  | 55 |
PPL Electric Utilities Corp [Member] | Period of 05-21-2020 to 12-31-2020 |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Regulatory Liability due to ROE Reserve, Before Tax |  |  |  |  |  |  |  |  | 28 |
Regulatory Liability due to ROE Reserve, After Tax |  |  |  |  |  |  |  |  | 20 |
PPL Electric Utilities Corp [Member] | Period of 05-21-2020 to 11-30-2021 |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Regulatory Liability due to ROE Reserve, Before Tax |  |  |  |  |  |  |  |  | 73 |
Regulatory Liability due to ROE Reserve, After Tax |  |  |  |  |  |  |  |  | 52 |
PPL Electric Utilities Corp [Member] | PPL Electric [Member] |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Act 129 Recovery Period Under Phase IV Plan |  |  |  |  |  |  |  |  |  | 5 years
PPL Electric Utilities Corp [Member] | PPL Electric Utilities Corp [Member] |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Regulatory Liability due to ROE Reserve, Before Tax |  |  |  |  |  |  |  |  | 78 |
PPL Electric Utilities Corp [Member] | PPL Electric Utilities Corp [Member] | Period of 05-21-2020 to 11-30-2021 |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |
Regulatory Liability due to ROE Reserve, Before Tax |  |  |  |  |  |  |  |  | $ 73 |
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |
Return on equity |  |  |  |  |  |  |  |  |  | 9.35%
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |
Amortization period for the deferred recovery of a regulatory asset |  |  |  |  |  |  |  |  |  | 12 months
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |
Return on equity |  |  |  |  |  |  |  |  |  | 9.35%
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |  |  |  |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |
Amortization period for the deferred recovery of a regulatory asset |  |  |  |  |  |  |  |  |  | 12 months

X
- Definition The period over which Act 129 Phase IV Plan costs will be recovered in "PnYnMnDTnHnMnS" format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount of ROE remitted by NEP + References No definition available. + Details
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- Definition The benefit-cost ratio that AMF program is due to yield over a 20-year period. + References No definition available. + Details
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- Definition The power rating of the 4-hour battery energy storage facility applied for via CPCN to be constructed at the E.W. Brown Generating Station in Mercer County, Kentucky. + References No definition available. + Details
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- Definition The net summer rating of the NGCC combustion turbine facilities applied for via CPCN at Mill Creek Generating Station in Jefferson County, Kentucky and E.W. Brown Generating Station in Mercer County, Kentucky. + References No definition available. + Details
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- Definition The amount of power need to be reduced by the implementation of proposed new and adjusted energy efficiency programs as part of a CPCN application. + References No definition available. + Details
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- Definition The power rating of the solar photovoltaic electric generating facility applied for via CPCN to be built by a third-party in Marion County, Kentucky. + References No definition available. + Details
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- Definition The power rating of the solar photovoltaic electric generating facility applied for via CPCN to be constructed in Mercer County, Kentucky. + References No definition available. + Details
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- Definition Amount of Capital Investment spending for the GMP filing in the 2024 Gas ISR plan included in RIE’s recently filed GMP, along with investments stemming from the completion of RIE’s area studies. + References No definition available. + Details
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- Definition Amount of capital Investment to spend on the Electrical ISR plan over a 21-month period. + References No definition available. + Details
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- Definition Capital Investment to spend on the FY 2024 Gas IRS plan. + References No definition available. + Details
Name: | ppl_CapitalInvestmentToSpendOnTheFY2024GasISRPlan
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The distance in miles of leak-prone gas pipe to be abandoned as part of the FY 2024 gas ISR plan. + References No definition available. + Details
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- Definition The total generating capacity of the E. W. Brown 3 Unit in megawatts. + References No definition available. + Details
Name: | ppl_EWBrown3UnitGenerationCapacityPower
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- Definition Net present value of estimated costs to fund the AMF program. + References No definition available. + Details
Name: | ppl_EstimatedNetPresentValue
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- Definition FERC Granted ROE + References No definition available. + Details
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- Definition The total generating capacity of the Ghent 2 Unit in megawatts. + References No definition available. + Details
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- Definition Initial minimum base ROE to be reset by the FERC + References No definition available. + Details
Name: | ppl_InitialMinimumBaseROEToBeResetByTheFERC
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- Definition Maximum Base ROE reset by FERC + References No definition available. + Details
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- Definition The total generating capacity of the Mill Creek 1 Unit in megawatts. + References No definition available. + Details
Name: | ppl_MillCreek1UnitGenerationCapacityPower
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- Definition The total generating capacity of the Mill Creek 2 Unit in megawatts. + References No definition available. + Details
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- Definition Minimum base ROE reset by FERC + References No definition available. + Details
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- Definition Net Present Value benefit of the AMF program over the 20-year project life. + References No definition available. + Details
Name: | ppl_NetPresentValueBenefitOfTheAMFProgram
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Balance Type: | credit
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- Definition The percentage ownership of the planned NGCC facilities to be owned by KU. + References No definition available. + Details
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- Definition The percentage ownership of the planned NGCC facilities owned by LG&E. + References No definition available. + Details
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- Definition New ROE by National Grid along with other NETOs who filed a brief supporting FERC's new methodology and confirming the illustrative numbers that FERC arrived at in its order addressing all four complaints + References No definition available. + Details
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- Definition The percentage ownership of the planned solar units to be owned by KU. + References No definition available. + Details
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- Definition The percentage ownership of the planned solar units to be owned by LG&E. + References No definition available. + Details
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- Definition Percentage of common equity ratio PIPUC used on used to determine thee allowed ROE + References No definition available. + Details
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Data Type: | dtr-types:percentItemType
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- Definition The amount of after tax regulatory liability increase due to return on equity reserve challenge. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition The amount of before tax regulatory liability increase due to return on equity reserve challenge. + References No definition available. + Details
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- References No definition available. + Details
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- References No definition available. + Details
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- Definition Supplemental Capital Investment to spend on the FY 2024 Electrical ISR Plan as required by the RIPUC. + References No definition available. + Details
Name: | ppl_SupplementalCapitalInvestmentToSpendOnTheFY2024ElectricalISRPlan
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- Definition Additional amount added to the FY 2024 gas ISR plan as required by the RIPUC. + References No definition available. + Details
Name: | ppl_SupplementalCapitalInvestmentToSpendOnTheFY2024GasISRPlan
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The total capacity of non-firm energy-only power-purchase agreements entered into for the output of four solar photovoltaic facilities that is not subject to KPSC approval. + References No definition available. + Details
Name: | ppl_TotalCapacityOfPowerPurchaseAgreementsNotSubjectToKPSCApprovalPower
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- Definition Percentage of public utility's approved return on equity. + References No definition available. + Details
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- Definition Amortization period for the recovery of regulatory asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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