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Utility Rate Regulation (Regulatory Matters) (Details) $ in Millions |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 26, 2024 USD ($) | Nov. 06, 2023 | Sep. 27, 2023 USD ($) | Oct. 16, 2018 | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 MW | Mar. 31, 2015 | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Jan. 31, 2025 USD ($) | Oct. 04, 2024 USD ($) | Apr. 26, 2024 | Apr. 25, 2024 USD ($) | Nov. 21, 2023 USD ($)
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | $ 2,060 | $ 1,874 |  |  | $ 2,060 | $ 1,874 |  |  |  |  |
Storm Costs [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | 113 | 97 |  |  | 113 | 97 |  |  |  |  |
Other [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | $ 41 | 43 |  |  | $ 41 | 43 |  |  |  |  |
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 |  |  |  |  |  |
Billing Issues, Expenses Incurred |  |  |  |  |  |  |  |  | $ 18 | 34 |  |  |  |  |
Distribution System Improvement Charge Cap |  |  |  |  | 5.00% |  |  |  | 5.00% |  |  |  |  |  |
PPL Electric [Member] | Pennsylvania Public Utility Commission [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PPL Electric Billing Issue, Donation to be Paid |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1 |
PPL Electric Billing Issue, Civil Penalty to be Paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1
Requested Distribution System Improvement Charge Cap |  |  |  |  |  |  |  |  |  |  |  |  | 9.00% |  |
LGE [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities, Power | MW |  |  |  |  |  |  | 640 |  |  |  |  |  |  |  |
LGE [Member] | Mill Creek Unit 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Property, Plant and Equipment, Generation or Processing |  |  |  |  | $ 221 |  |  |  | $ 221 |  |  |  |  |  |
Public Utilities, Property, Plant and Equipment, Generation, Expected Remaining Book Value at Retirement |  |  |  |  | 161 |  |  |  | $ 161 |  |  |  |  |  |
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] | Mill Creek Unit 1 Retirement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Regulatory Costs Not yet Approved |  |  |  |  |  |  |  |  |  |  |  | $ 125 |  |  |
LGE [Member] | Kentucky Public Service Commission [Member] | Storm Costs [Member] | September 2024 KY Storm |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | 2 |  |  |  | $ 2 |  |  |  |  |  |
LGE [Member] | Kentucky Public Service Commission [Member] | Storm Costs [Member] | May 2024 KY Storm |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | $ 4 |  |  |  | $ 4 |  |  |  |  |  |
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 |  |  |  | 12 months |  |  |  |  |  |
LGE [Member] | Subsequent Event [Member] | Kentucky Public Service Commission [Member] | January 2025 KY Storm |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Regulatory Costs Not yet Approved |  |  |  |  |  |  |  |  |  |  | $ 2 |  |  |  |
KU [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities, Power | MW |  |  |  |  |  |  | 640 |  |  |  |  |  |  |  |
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] | Storm Costs [Member] | September 2024 KY Storm |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | $ 11 |  |  |  | $ 11 |  |  |  |  |  |
KU [Member] | Kentucky Public Service Commission [Member] | Storm Costs [Member] | May 2024 KY Storm |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | $ 5 |  |  |  | $ 5 |  |  |  |  |  |
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 |  |  |  | 12 months |  |  |  |  |  |
KU [Member] | Subsequent Event [Member] | Kentucky Public Service Commission [Member] | January 2025 KY Storm |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Regulatory Costs Not yet Approved |  |  |  |  |  |  |  |  |  |  | 8 |  |  |  |
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 | Maximum ROE authorized |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FERC Granted ROE |  |  |  |  |  |  |  |  | 11.74% |  |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commsion |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recovery Cap on Capital Investment Related to AMF Program |  |  | $ 153 |  |  |  |  |  |  |  |  |  |  |  |
Capital Investment Spend on FY 2025 Gas ISR Plan |  |  |  |  |  | 185 |  |  |  |  |  |  |  |  |
Contingency Plan Spend on FY 2025 Gas ISR Plan |  |  |  |  |  | 11 |  |  |  |  |  |  |  |  |
Capital Investment Spend on FY 2025 Electric ISR Plan |  |  |  |  |  | 141 |  |  |  |  |  |  |  |  |
Total Approved Spend on FY 2025 Gas ISR Plan | $ 180 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approved Contingency Plan Spend on FY 2025 Gas ISR Plan | 11 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Investment Spend on FY 2026 Gas ISR Plan |  |  |  |  | $ 187 |  |  |  |  |  |  |  |  |  |
Capital Investment Spend on FY 2026 Electric ISR Plan |  |  |  |  | 160 |  |  |  |  |  |  |  |  |  |
Contingency Plan Spend on FY 2026 Gas ISR Plan |  |  |  |  | 15 |  |  |  |  |  |  |  |  |  |
Total Capital Investment Spend on FY 2026 Electric ISR Plan |  |  |  |  | 248 |  |  |  |  |  |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Paving Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Investment Spend on FY 2026 Gas ISR Plan |  |  |  |  |  |  |  |  | $ 22 |  |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commsion | AMF Capital Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approved Capital Investment Spend on FY 2025 Electric ISR Plan |  |  |  |  | 88 |  |  |  |  |  |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Vegetation Management |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Investment Spend on FY 2026 Electric ISR Plan |  |  |  |  | 14 |  |  |  |  |  |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Other O&M |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Investment Spend on FY 2026 Electric ISR Plan |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Paving Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Approved Spend on FY 2025 Gas ISR Plan | 12 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Capital Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Approved Spend on FY 2025 Gas ISR Plan | 168 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Vegetation Management |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Investment Spend on FY 2025 Electric ISR Plan |  |  |  |  |  | 13 |  |  |  |  |  |  |  |  |
Approved Capital Investment Spend on FY 2025 Electric ISR Plan | 13 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Other O&M |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Investment Spend on FY 2025 Electric ISR Plan |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |
Approved Capital Investment Spend on FY 2025 Electric ISR Plan | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rhode Island Energy | Rhode Island Public Uitilty Commsion | Capital Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approved Capital Investment Spend on FY 2025 Electric ISR Plan | $ 132 |  |  |  |  |  |  |  |  |  |  |  |  |  |
PPL Electric Utilities Corp [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Act 129 Recovery Period Under Phase IV Plan |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |
Regulatory assets |  |  |  |  | $ 673 | 598 |  |  | $ 673 | 598 |  |  |  |  |
Billing Issues, Expenses Incurred |  |  |  |  |  |  |  |  | $ 18 | 34 |  |  |  |  |
Distribution System Improvement Charge Cap |  |  |  |  | 5.00% |  |  |  | 5.00% |  |  |  |  |  |
PPL Electric Utilities Corp [Member] | Storm Costs [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | $ 22 | 0 |  |  | $ 22 | 0 |  |  |  |  |
PPL Electric Utilities Corp [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | 2 | 0 |  |  | 2 | 0 |  |  |  |  |
PPL Electric Utilities Corp [Member] | Pennsylvania Public Utility Commission [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PPL Electric Billing Issue, Donation to be Paid |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1 |
PPL Electric Billing Issue, Civil Penalty to be Paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1
Requested Distribution System Improvement Charge Cap |  |  |  |  |  |  |  |  |  |  |  |  | 9.00% |  |
Louisville Gas And Electric Co [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities, Power | MW |  |  |  |  |  |  | 640 |  |  |  |  |  |  |  |
New NGCC LG&E Planned Ownership Percentage |  | 0.31 |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | 491 | 395 |  |  | 491 | 395 |  |  |  |  |
Louisville Gas And Electric Co [Member] | Mill Creek Unit 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Property, Plant and Equipment, Generation or Processing |  |  |  |  | 221 |  |  |  | 221 |  |  |  |  |  |
Public Utilities, Property, Plant and Equipment, Generation, Expected Remaining Book Value at Retirement |  |  |  |  | 161 |  |  |  | 161 |  |  |  |  |  |
Louisville Gas And Electric Co [Member] | Storm Costs [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | 20 | 15 |  |  | 20 | 15 |  |  |  |  |
Louisville Gas And Electric Co [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | 0 | 0 |  |  | $ 0 | 0 |  |  |  |  |
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] | Mill Creek Unit 1 Retirement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Regulatory Costs Not yet Approved |  |  |  |  |  |  |  |  |  |  |  | $ 125 |  |  |
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Storm Costs [Member] | September 2024 KY Storm |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | 2 |  |  |  | $ 2 |  |  |  |  |  |
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Storm Costs [Member] | May 2024 KY Storm |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | $ 4 |  |  |  | $ 4 |  |  |  |  |  |
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 |  |  |  | 12 months |  |  |  |  |  |
Louisville Gas And Electric Co [Member] | Subsequent Event [Member] | Kentucky Public Service Commission [Member] | January 2025 KY Storm |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Regulatory Costs Not yet Approved |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |
Kentucky Utilities Co [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CPCN NGCC Combustion Turbine Facilities, Power | MW |  |  |  |  |  |  | 640 |  |  |  |  |  |  |  |
New NGCC KU Planned Ownership Percentage |  | 0.69 |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | $ 458 | 439 |  |  | $ 458 | 439 |  |  |  |  |
Kentucky Utilities Co [Member] | Storm Costs [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | 29 | 14 |  |  | 29 | 14 |  |  |  |  |
Kentucky Utilities Co [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | 8 | $ 7 |  |  | $ 8 | $ 7 |  |  |  |  |
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] | Storm Costs [Member] | September 2024 KY Storm |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | 11 |  |  |  | $ 11 |  |  |  |  |  |
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] | Storm Costs [Member] | May 2024 KY Storm |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory assets |  |  |  |  | $ 5 |  |  |  | $ 5 |  |  |  |  |  |
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 |  |  |  | 12 months |  |  |  |  |  |
Kentucky Utilities Co [Member] | Subsequent Event [Member] | Kentucky Public Service Commission [Member] | January 2025 KY Storm |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Matters Federal Matters Federal Energy Regulatory Commission Wholesale Formula Rates Numeric [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Regulatory Costs Not yet Approved |  |  |  |  |  |  |  |  |  |  | $ 8 |  |  |  |

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- 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 Approved March 26, 2024, to Spend on FY 2025 Electric ISR Plan + References No definition available. + Details
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- Definition Amount of contingency spend on FY 2025 Gas ISR Plan approved by the RIPUC on April 1, 2024, contingent on Pipeline and Hazardous Material Safety Administration potential enactment of regulations during FY 2025. + 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 Amount to spend on the FY 2024 Gas ISR plan required by the RIPUC. + References No definition available. + Details
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- Definition Amount to spend on the FY 2025 Gas plan as required by the RIPUC, contingent on Pipeline and Hazardous Material Safety Administration potential enactment of regulations during FY 2025. + References No definition available. + Details
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- Definition The limit on what can be charged as Distribution System Improvement Charges, which is defined as a percentage of billed revenue. + References No definition available. + Details
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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 Total amount approved April 1, 2024, to spend on the FY 2025 Gas ISR Plan by the RIPUC. + 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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