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Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
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Summary Of Significant Accounting Policies [Line Items] |  |
Goodwill | $ 2,247 | $ 2,247
Reconciliation of Cash, Cash Equivalents and Restricted Cash from the Balance Sheet to Cash Flow Statement [Line Items] |  |
Cash and cash equivalents | 1,102 | 306
Restricted Cash, Current | 42 | 1
Cash, Cash Equivalents and Restricted Cash | 1,144 | 307
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 | 13 | 24
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 | 515 | 8
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 | $ 341 | $ 13

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