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Commitments and Contingencies (Energy Purchases, Energy Sales, Other Commitments and Legal Matters) (Details) $ in Millions | 12 Months Ended |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Oct. 07, 2024 MW | Jul. 01, 2022 MW | Dec. 06, 2018 MW | Apr. 09, 2018 MW | Oct. 01, 2015 MW | Dec. 31, 2014 MW | May 01, 2012 MW | Jul. 01, 2011 MW | Jul. 01, 2010 MW | Jun. 30, 2010 MW
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
LTCS Renewable Energy Contract, Deepwater Agreement, Power | MW |  |  |  |  |  |  |  |  |  |  |  |  | 30
LTCS Renewable Energy Contract, Three-State Procurement, Power | MW |  |  |  |  |  |  | 36.427 |  |  |  |  |  |
LTCS Renewable Energy Contract, Offshore Wind Energy Procurement, Power | MW |  |  |  |  |  | 408 |  |  |  |  |  |  |
LTCS Renewable Energy Contracting Capacity Requirement | MW |  |  |  |  |  |  |  |  | 90 |  |  |  |
LTCS Renewable Energy Contract, First Solicitation, Power | MW |  |  |  |  |  |  |  |  |  |  | 3.2 |  |
LTCS Renewable Energy Contract, Second Solicitation, Power | MW |  |  |  |  |  |  |  |  |  | 3.9 |  |  |
LTCS Renewable Energy Contract, Third Solicitation, Power | MW |  |  |  |  |  |  |  | 80 |  |  |  |  |
LTCS Renewable Energy Contract, Fourth Solicitation, Power | MW |  |  |  |  |  |  |  |  |  |  |  | 32.1 |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
ACES Renewable Energy Contracting Capacity Requirement | MW |  |  |  |  | 200 |  |  |  |  |  |  |  |
RIE Solicitation of Renewable Contracting Capacity | MW |  |  |  | 20 |  |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
RIE Solicitation of Renewable Contracting Capacity | MW |  |  |  | 150 |  |  |  |  |  |  |  |  |
Power Purchase [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Purchase Commitments (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2023 | $ 36 |  |  |  |  |  |  |  |  |  |  |  |
2024 | 39 |  |  |  |  |  |  |  |  |  |  |  |
2025 | 39 |  |  |  |  |  |  |  |  |  |  |  |
2026 | 36 |  |  |  |  |  |  |  |  |  |  |  |
2027 | 36 |  |  |  |  |  |  |  |  |  |  |  |
Thereafter | 256 |  |  |  |  |  |  |  |  |  |  |  |
Total | 442 |  |  |  |  |  |  |  |  |  |  |  |
Purchases | 30 | $ 29 | $ 30 |  |  |  |  |  |  |  |  |  |
Rhode Island Energy | Power Purchase [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Purchase Commitments (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2023 | 274 |  |  |  |  |  |  |  |  |  |  |  |
Thereafter | 300 |  |  |  |  |  |  |  |  |  |  |  |
Total | 936 |  |  |  |  |  |  |  |  |  |  |  |
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2026-2027 | 240 |  |  |  |  |  |  |  |  |  |  |  |
2028-2029 | 122 |  |  |  |  |  |  |  |  |  |  |  |
Louisville Gas And Electric Co [Member] | Power Purchase [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Purchase Commitments (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2023 | 25 |  |  |  |  |  |  |  |  |  |  |  |
2024 | 27 |  |  |  |  |  |  |  |  |  |  |  |
2025 | 27 |  |  |  |  |  |  |  |  |  |  |  |
2026 | 25 |  |  |  |  |  |  |  |  |  |  |  |
2027 | 25 |  |  |  |  |  |  |  |  |  |  |  |
Thereafter | 177 |  |  |  |  |  |  |  |  |  |  |  |
Total | 306 |  |  |  |  |  |  |  |  |  |  |  |
Purchases | 21 | 20 | 21 |  |  |  |  |  |  |  |  |  |
Kentucky Utilities Co [Member] | Power Purchase [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Purchase Commitments (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2023 | 11 |  |  |  |  |  |  |  |  |  |  |  |
2024 | 12 |  |  |  |  |  |  |  |  |  |  |  |
2025 | 12 |  |  |  |  |  |  |  |  |  |  |  |
2026 | 11 |  |  |  |  |  |  |  |  |  |  |  |
2027 | 11 |  |  |  |  |  |  |  |  |  |  |  |
Thereafter | 79 |  |  |  |  |  |  |  |  |  |  |  |
Total | 136 |  |  |  |  |  |  |  |  |  |  |  |
Purchases | 9 | 9 | $ 9 |  |  |  |  |  |  |  |  |  |
PPL Electric Additional Sites [Member] | PPL Electric [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Accrual for Environmental Loss Contingencies | 8 | 8 |  |  |  |  |  |  |  |  |  |  |
PPL Electric Additional Sites [Member] | PPL Electric Utilities Corp [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Accrual for Environmental Loss Contingencies | $ 8 | $ 8 |  |  |  |  |  |  |  |  |  |  |

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