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Commitments and Contingencies (Energy Purchases, Energy Sales, Other Commitments and Legal Matters) (Details) $ in Millions | 12 Months Ended |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Mar. 04, 2025 USD ($) | Feb. 21, 2025 USD ($) | 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 |  |  |  |  |  |
LTCS Renewable Energy Contract, Offshore Wind Energy Procurement, Power | MW |  |  |  |  |  | 407 |  |  |  |  |  |  |
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 |  |  |  |  |
Rhode Island Division Of Public Utilities And Carriers Amount Already Credited To The RIE Energy Efficiency Program |  |  |  | $ 2 |  |  |  |  |  |  |  |  |
LTCS Renewable Energy Contract, Fourth Solicitation, Power | MW |  |  |  |  |  |  |  |  |  |  |  | 32.1 |
Rhode Island Division Of Public Utilities And Carriers Amount To Be Refunded To The RIE Energy Efficiency Program |  |  |  | 10 | $ 12 |  |  |  |  |  |  |  |
Rhode Island Division Of Public Utilities And Carriers Amount To Be Recorded As A Reduction To The Storm Contingency Fund Balance |  |  |  | $ 8 |  |  |  |  |  |  |  |  |
Power Purchase [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Purchase Commitments (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2023 | $ 27 |  |  |  |  |  |  |  |  |  |  |  |
2024 | 34 |  |  |  |  |  |  |  |  |  |  |  |
2025 | 35 |  |  |  |  |  |  |  |  |  |  |  |
2026 | 36 |  |  |  |  |  |  |  |  |  |  |  |
2027 | 33 |  |  |  |  |  |  |  |  |  |  |  |
Thereafter | 267 |  |  |  |  |  |  |  |  |  |  |  |
Total | 432 |  |  |  |  |  |  |  |  |  |  |  |
Purchases | 37 | $ 30 | $ 29 |  |  |  |  |  |  |  |  |  |
Rhode Island Energy | Power Purchase [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Purchase Commitments (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2023 | 268 |  |  |  |  |  |  |  |  |  |  |  |
Thereafter | 346 |  |  |  |  |  |  |  |  |  |  |  |
Total | 939 |  |  |  |  |  |  |  |  |  |  |  |
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2027-2028 | 199 |  |  |  |  |  |  |  |  |  |  |  |
2029-2030 | 126 |  |  |  |  |  |  |  |  |  |  |  |
Louisville Gas And Electric Co [Member] | Power Purchase [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Purchase Commitments (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2023 | 19 |  |  |  |  |  |  |  |  |  |  |  |
2024 | 24 |  |  |  |  |  |  |  |  |  |  |  |
2025 | 24 |  |  |  |  |  |  |  |  |  |  |  |
2026 | 25 |  |  |  |  |  |  |  |  |  |  |  |
2027 | 23 |  |  |  |  |  |  |  |  |  |  |  |
Thereafter | 184 |  |  |  |  |  |  |  |  |  |  |  |
Total | 299 |  |  |  |  |  |  |  |  |  |  |  |
Purchases | 26 | 21 | 20 |  |  |  |  |  |  |  |  |  |
Kentucky Utilities Co [Member] | Power Purchase [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Purchase Commitments (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2023 | 8 |  |  |  |  |  |  |  |  |  |  |  |
2024 | 10 |  |  |  |  |  |  |  |  |  |  |  |
2025 | 11 |  |  |  |  |  |  |  |  |  |  |  |
2026 | 11 |  |  |  |  |  |  |  |  |  |  |  |
2027 | 10 |  |  |  |  |  |  |  |  |  |  |  |
Thereafter | 83 |  |  |  |  |  |  |  |  |  |  |  |
Total | 133 |  |  |  |  |  |  |  |  |  |  |  |
Purchases | 11 | 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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