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Commitments and Contingencies (Energy Purchases, Energy Sales, Other Commitments and Legal Matters) (Details) $ in Millions |  | 12 Months Ended |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 18, 2014 USD ($) | Dec. 31, 2022 USD ($) MW | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jul. 01, 2022 MW | Dec. 06, 2018 MW | Apr. 09, 2018 MW | Oct. 01, 2015 MW | Jun. 01, 2015 | Dec. 31, 2014 MW | May 01, 2012 MW | Jul. 01, 2011 MW | Jun. 30, 2010 MW
Claim By Former Affiliate [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring And Related Activities Ownership Percentage By Riverstone |  |  |  |  |  |  |  |  | 35.00% |  |  |  |
Proceeds from Divestiture of Businesses and Interests in Affiliates | $ 900 |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  | 36.75 |  |  |  |  |  |
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 |  |  |  |  |
Amount of MW Required to Meet LTCS Renewable Energy Contracting Capacity Requirement | MW |  | 12 |  |  |  |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
ACES Renewable Energy Contracting Capacity Requirement | MW |  |  |  |  | 600 |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
ACES Renewable Energy Contracting Capacity Requirement | MW |  |  |  |  | 1,000 |  |  |  |  |  |  |  |
Power Purchase [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Purchase Commitments (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2023 |  | $ 34 |  |  |  |  |  |  |  |  |  |  |
2024 |  | 32 |  |  |  |  |  |  |  |  |  |  |
2025 |  | 32 |  |  |  |  |  |  |  |  |  |  |
2026 |  | 32 |  |  |  |  |  |  |  |  |  |  |
2027 |  | 32 |  |  |  |  |  |  |  |  |  |  |
Thereafter |  | 265 |  |  |  |  |  |  |  |  |  |  |
Total |  | 427 |  |  |  |  |  |  |  |  |  |  |
Purchases |  | 30 | $ 19 | $ 18 |  |  |  |  |  |  |  |  |
Rhode Island Energy | Power Purchase [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Purchase Commitments (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2023 |  | 471 |  |  |  |  |  |  |  |  |  |  |
Thereafter |  | 279 |  |  |  |  |  |  |  |  |  |  |
Total |  | 995 |  |  |  |  |  |  |  |  |  |  |
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2024-2025 |  | 172 |  |  |  |  |  |  |  |  |  |  |
2026-2027 |  | 73 |  |  |  |  |  |  |  |  |  |  |
Louisville Gas And Electric Co [Member] | Power Purchase [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Purchase Commitments (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2023 |  | 24 |  |  |  |  |  |  |  |  |  |  |
2024 |  | 22 |  |  |  |  |  |  |  |  |  |  |
2025 |  | 22 |  |  |  |  |  |  |  |  |  |  |
2026 |  | 22 |  |  |  |  |  |  |  |  |  |  |
2027 |  | 22 |  |  |  |  |  |  |  |  |  |  |
Thereafter |  | 184 |  |  |  |  |  |  |  |  |  |  |
Total |  | 296 |  |  |  |  |  |  |  |  |  |  |
Purchases |  | 21 | 13 | 12 |  |  |  |  |  |  |  |  |
Kentucky Utilities Co [Member] | Power Purchase [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Purchase Commitments (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2023 |  | 10 |  |  |  |  |  |  |  |  |  |  |
2024 |  | 10 |  |  |  |  |  |  |  |  |  |  |
2025 |  | 10 |  |  |  |  |  |  |  |  |  |  |
2026 |  | 10 |  |  |  |  |  |  |  |  |  |  |
2027 |  | 10 |  |  |  |  |  |  |  |  |  |  |
Thereafter |  | 81 |  |  |  |  |  |  |  |  |  |  |
Total |  | 131 |  |  |  |  |  |  |  |  |  |  |
Purchases |  | 9 | 6 | $ 6 |  |  |  |  |  |  |  |  |
PPL Electric Additional Sites [Member] | PPL Electric [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Accrual for Environmental Loss Contingencies |  | 11 | 10 |  |  |  |  |  |  |  |  |  |
PPL Electric Additional Sites [Member] | PPL Electric Utilities Corp [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Accrual for Environmental Loss Contingencies |  | $ 11 | $ 10 |  |  |  |  |  |  |  |  |  |

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