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Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Goodwill | $ 2,247 | $ 2,248 |  |
Reconciliation of Cash, Cash Equivalents and Restricted Cash from the Balance Sheet to Cash Flow Statement [Line Items] |  |  |  |
Cash and cash equivalents | 353 | 356 |  |
Restricted Cash, Current | 1 | 1 |  |
Cash, Cash Equivalents and Restricted Cash | 354 | 357 |  |
PPL Electric Utilities Corp [Member] |  |  |  |
Reconciliation of Cash, Cash Equivalents and Restricted Cash from the Balance Sheet to Cash Flow Statement [Line Items] |  |  |  |
Cash and cash equivalents | 56 | 25 |  |
Louisville Gas And Electric Co [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Goodwill | 389 | 389 |  |
Reconciliation of Cash, Cash Equivalents and Restricted Cash from the Balance Sheet to Cash Flow Statement [Line Items] |  |  |  |
Cash and cash equivalents | 8 | 93 | $ 25 | $ 9
Kentucky Utilities Co [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Goodwill | 607 | 607 |  |
Reconciliation of Cash, Cash Equivalents and Restricted Cash from the Balance Sheet to Cash Flow Statement [Line Items] |  |  |  |
Cash and cash equivalents | $ 8 | $ 21 | $ 25 | $ 13

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