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Utility Rate Regulation (Regulatory Matters) (Details) - USD ($) $ in Millions |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 28, 2018 | Mar. 14, 2018 | Jan. 10, 2018 | Dec. 31, 2018 | Jun. 14, 2018
PPL Electric [Member] | Pennsylvania Public Utility Commission [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Gas Franchise (Numeric) [Abstract] |  |  |  |  |
Negative Surcharge |  |  |  |  | 7.05%
PPL Electric [Member] | Pennsylvania Public Utility Commission [Member] | Tax Cuts And Jobs Act [Member] | Noncurrent [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA |  |  |  | $ 41 |
LKE [Member] |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |
MISO Transmission Credits |  |  |  | $ 22 |
LKE [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Approved Additional Amount Of Rate Reduction Due To TCJA Prior To Petition | $ 27 |  |  |  |
LKE [Member] | Kentucky Public Service Commission [Member] | Electric And Gas Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Decrease In Approved Additional Amount Of Rate Reduction Due To The TCJA | $ 13 |  |  |  |
LGE [Member] | Kentucky Public Service Commission [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Requested return on equity | 10.42% |  |  |  |
LGE [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Dollar amount requested increase in base rates with anticipated rate case filing | $ 35 |  |  |  |
Percentage requested increase in base rates with anticipated rate case filing | 3.00% |  |  |  |
LGE [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | $ 69 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 79 |  |  |  |
Approved Additional Amount Of Rate Reduction Due To TCJA Prior To Petition | 10 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 74 |  |  |  |
LGE [Member] | Kentucky Public Service Commission [Member] | Gas Rates [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Dollar amount requested increase in base rates with anticipated rate case filing | $ 25 |  |  |  |
Percentage requested increase in base rates with anticipated rate case filing | 7.50% |  |  |  |
LGE [Member] | Kentucky Public Service Commission [Member] | Electric And Gas Rates [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - CPCN Filings (Numeric) [Abstract] |  |  |  |  |
Advanced Metering Systems Deployment Estimated Capital Cost, Electric Service |  |  | $ 166 |  |
LGE [Member] | Kentucky Public Service Commission [Member] | Electric And Gas Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Decrease In Approved Additional Amount Of Rate Reduction Due To The TCJA | $ 6 |  |  |  |
LGE [Member] | Kentucky Public Service Commission [Member] | Bill Credit [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | 49 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 59 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 54 |  |  |  |
LGE [Member] | Kentucky Public Service Commission [Member] | Bill Credit [Member] | Gas Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | 17 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 16 |  |  |  |
LGE [Member] | Kentucky Public Service Commission [Member] | Existing Rate Mechanism [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | 20 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 20 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | $ 20 |  |  |  |
KU [Member] | Kentucky Public Service Commission [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Requested return on equity | 10.42% |  |  |  |
KU [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Dollar amount requested increase in base rates with anticipated rate case filing | $ 112 |  |  |  |
Percentage requested increase in base rates with anticipated rate case filing | 6.90% |  |  |  |
Regulatory Matters - Kentucky Activities - CPCN Filings (Numeric) [Abstract] |  |  |  |  |
Advanced Metering Systems Deployment Estimated Capital Cost, Electric Service |  |  | 155 |  |
KU [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | $ 91 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 108 |  |  |  |
Approved Additional Amount Of Rate Reduction Due To TCJA Prior To Petition | 17 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 101 |  |  |  |
KU [Member] | Kentucky Public Service Commission [Member] | Electric And Gas Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Decrease In Approved Additional Amount Of Rate Reduction Due To The TCJA | 7 |  |  |  |
KU [Member] | Kentucky Public Service Commission [Member] | Bill Credit [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | 70 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 87 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 80 |  |  |  |
KU [Member] | Kentucky Public Service Commission [Member] | Existing Rate Mechanism [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | 21 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 21 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 21 |  |  |  |
PPL Electric Utilities Corp [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Amortization period for the deferred recovery of a regulatory asset |  |  |  | 5 years |
PPL Electric Utilities Corp [Member] | Pennsylvania Public Utility Commission [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Gas Franchise (Numeric) [Abstract] |  |  |  |  |
Negative Surcharge |  |  |  |  | 7.05%
PPL Electric Utilities Corp [Member] | Pennsylvania Public Utility Commission [Member] | Tax Cuts And Jobs Act [Member] | Noncurrent [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA |  |  |  | $ 41 |
LG And E And KU Energy LLC [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Approved Additional Amount Of Rate Reduction Due To TCJA Prior To Petition | 27 |  |  |  |
LG And E And KU Energy LLC [Member] | Kentucky Public Service Commission [Member] | Electric And Gas Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Decrease In Approved Additional Amount Of Rate Reduction Due To The TCJA | $ 13 |  |  |  |
LG And E And KU Energy LLC [Member] | LGE and KU [Member] |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |
MISO Transmission Credits |  |  |  | 22 |
LG And E And KU Energy LLC [Member] | LGE [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Gas Franchise (Numeric) [Abstract] |  |  |  |  |
Franchise Agreement Term |  | 5 years |  |  |
Days of Notice to Modify Franchise Fee |  | 60 days |  |  |
Franchise Fee Cap |  | 3.00% |  |  |
Franchise Fee If Recovered From Customers |  | 0.00% |  |  |
LG And E And KU Energy LLC [Member] | LGE [Member] | Kentucky Public Service Commission [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Requested return on equity | 10.42% |  |  |  |
LG And E And KU Energy LLC [Member] | LGE [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Dollar amount requested increase in base rates with anticipated rate case filing | $ 35 |  |  |  |
Percentage requested increase in base rates with anticipated rate case filing | 3.00% |  |  |  |
LG And E And KU Energy LLC [Member] | LGE [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | $ 69 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 79 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 74 |  |  |  |
LG And E And KU Energy LLC [Member] | LGE [Member] | Kentucky Public Service Commission [Member] | Gas Rates [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Dollar amount requested increase in base rates with anticipated rate case filing | $ 25 |  |  |  |
Percentage requested increase in base rates with anticipated rate case filing | 7.50% |  |  |  |
LG And E And KU Energy LLC [Member] | LGE [Member] | Kentucky Public Service Commission [Member] | Electric And Gas Rates [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - CPCN Filings (Numeric) [Abstract] |  |  |  |  |
Advanced Metering Systems Deployment Estimated Capital Cost, Electric Service |  |  | 166 |  |
LG And E And KU Energy LLC [Member] | LGE [Member] | Kentucky Public Service Commission [Member] | Bill Credit [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | $ 49 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 59 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 54 |  |  |  |
LG And E And KU Energy LLC [Member] | LGE [Member] | Kentucky Public Service Commission [Member] | Bill Credit [Member] | Gas Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | 17 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 16 |  |  |  |
LG And E And KU Energy LLC [Member] | LGE [Member] | Kentucky Public Service Commission [Member] | Existing Rate Mechanism [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | 20 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 20 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | $ 20 |  |  |  |
LG And E And KU Energy LLC [Member] | KU [Member] | Kentucky Public Service Commission [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Requested return on equity | 10.42% |  |  |  |
LG And E And KU Energy LLC [Member] | KU [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Dollar amount requested increase in base rates with anticipated rate case filing | $ 112 |  |  |  |
Percentage requested increase in base rates with anticipated rate case filing | 6.90% |  |  |  |
Regulatory Matters - Kentucky Activities - CPCN Filings (Numeric) [Abstract] |  |  |  |  |
Advanced Metering Systems Deployment Estimated Capital Cost, Electric Service |  |  | 155 |  |
LG And E And KU Energy LLC [Member] | KU [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | $ 91 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 108 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 101 |  |  |  |
LG And E And KU Energy LLC [Member] | KU [Member] | Kentucky Public Service Commission [Member] | Bill Credit [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | 70 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 87 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 80 |  |  |  |
LG And E And KU Energy LLC [Member] | KU [Member] | Kentucky Public Service Commission [Member] | Existing Rate Mechanism [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | 21 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 21 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | $ 21 |  |  |  |
Louisville Gas And Electric Co [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Gas Franchise (Numeric) [Abstract] |  |  |  |  |
Franchise Agreement Term |  | 5 years |  |  |
Days of Notice to Modify Franchise Fee |  | 60 days |  |  |
Franchise Fee Cap |  | 3.00% |  |  |
Franchise Fee If Recovered From Customers |  | 0.00% |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |
MISO Transmission Credits |  |  |  | 22 |
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Requested return on equity | 10.42% |  |  |  |
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Dollar amount requested increase in base rates with anticipated rate case filing | $ 35 |  |  |  |
Percentage requested increase in base rates with anticipated rate case filing | 3.00% |  |  |  |
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | $ 69 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 79 |  |  |  |
Approved Additional Amount Of Rate Reduction Due To TCJA Prior To Petition | 10 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 74 |  |  |  |
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Gas Rates [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Dollar amount requested increase in base rates with anticipated rate case filing | $ 25 |  |  |  |
Percentage requested increase in base rates with anticipated rate case filing | 7.50% |  |  |  |
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Electric And Gas Rates [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - CPCN Filings (Numeric) [Abstract] |  |  |  |  |
Advanced Metering Systems Deployment Estimated Capital Cost, Electric Service |  |  | 166 |  |
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Electric And Gas Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Decrease In Approved Additional Amount Of Rate Reduction Due To The TCJA | $ 6 |  |  |  |
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Bill Credit [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | 49 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 59 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 54 |  |  |  |
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Bill Credit [Member] | Gas Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | 17 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 16 |  |  |  |
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Existing Rate Mechanism [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | 20 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 20 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | $ 20 |  |  |  |
Kentucky Utilities Co [Member] |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |
MISO Transmission Credits |  |  |  | $ 22 |
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Requested return on equity | 10.42% |  |  |  |
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - Rate Case Proceedings (Numeric) [Abstract] |  |  |  |  |
Dollar amount requested increase in base rates with anticipated rate case filing | $ 112 |  |  |  |
Percentage requested increase in base rates with anticipated rate case filing | 6.90% |  |  |  |
Regulatory Matters - Kentucky Activities - CPCN Filings (Numeric) [Abstract] |  |  |  |  |
Advanced Metering Systems Deployment Estimated Capital Cost, Electric Service |  |  | $ 155 |  |
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | $ 91 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 108 |  |  |  |
Approved Additional Amount Of Rate Reduction Due To TCJA Prior To Petition | 17 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 101 |  |  |  |
Decrease In Approved Additional Amount Of Rate Reduction Due To The TCJA | 7 |  |  |  |
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] | Bill Credit [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | 70 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 87 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | 80 |  |  |  |
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] | Existing Rate Mechanism [Member] | Electric Rates [Member] | Tax Cuts And Jobs Act [Member] |  |  |  |  |
Regulatory Matters - Kentucky Activities - TCJA Impact On LG&E And KU Rates [Abstract] |  |  |  |  |
Settled upon amount - before final approval | 21 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA Prior To Petition | 21 |  |  |  |
Approved Amount Of Rate Reduction Due To TCJA | $ 21 |  |  |  |

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- Definition The approved additional reduction amount prior to the petition filed by LGE & KU to be returned to customers due to TCJA. + References No definition available. + Details
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- Definition The approved amount to be returned to customers due to the TCJA. + References No definition available. + Details
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- Definition The approved amount prior to the petition filed by LGE & KU to be returned to customers due to the TCJA. + References No definition available. + Details
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- Definition Estimated costs incurred to transmit power across multiple utility systems or zones paid to MISO by LG&E and KU on behalf of certain transmission customers. + References No definition available. + Details
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