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Fair Value Measurements (Assets and Liabilities Measured on Recurring Basis Table) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023
Recurring [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | $ 306 | $ 331
Restricted cash and cash equivalents | 33 | 51
Total Cash, Cash Equivalents and Restricted Cash, Fair Value | 339 | 382
Money market fund | 1 | 1
Commingled debt fund measured at NAV | 10 | 9
Commingled equity fund measured at NAV | 8 | 8
Total special use funds | 19 | 18
Gas Purchase Contract, Fair Value Disclosure | 9 | 1
Total Assets | 367 | 401
Interest rate swaps | 3 | 7
Gas contracts, Liability | 13 | 60
Liability value | 16 | 67
Recurring [Member] | PPL Electric Utilities Corp [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | 24 | 51
Total Assets | 24 | 51
Recurring [Member] | LOUISVILLE GAS And ELECTRIC CO [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | 8 | 18
Restricted cash and cash equivalents | 16 | 26
Total Cash, Cash Equivalents and Restricted Cash, Fair Value | 24 | 44
Total Assets | 24 | 44
Interest rate swaps | 3 | 7
Liability value | 3 | 7
Recurring [Member] | Kentucky Utilities Co [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | 13 | 14
Restricted cash and cash equivalents | 16 | 24
Total Cash, Cash Equivalents and Restricted Cash, Fair Value | 29 | 38
Total Assets | 29 | 38
Recurring [Member] | Level 1 [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | 306 | 331
Restricted cash and cash equivalents | 33 | 51
Total Cash, Cash Equivalents and Restricted Cash, Fair Value | 339 | 382
Money market fund | 1 | 1
Total special use funds | 1 | 1
Gas Purchase Contract, Fair Value Disclosure | 0 | 0
Total Assets | 340 | 383
Interest rate swaps | 0 | 0
Gas contracts, Liability | 0 | 0
Liability value | 0 | 0
Recurring [Member] | Level 1 [Member] | PPL Electric Utilities Corp [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | 24 | 51
Total Assets | 24 | 51
Recurring [Member] | Level 1 [Member] | LOUISVILLE GAS And ELECTRIC CO [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | 8 | 18
Restricted cash and cash equivalents | 16 | 26
Total Cash, Cash Equivalents and Restricted Cash, Fair Value | 24 | 44
Total Assets | 24 | 44
Interest rate swaps | 0 | 0
Liability value | 0 | 0
Recurring [Member] | Level 1 [Member] | Kentucky Utilities Co [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | 13 | 14
Restricted cash and cash equivalents | 16 | 24
Total Cash, Cash Equivalents and Restricted Cash, Fair Value | 29 | 38
Total Assets | 29 | 38
Recurring [Member] | Level 2 [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | 0 | 0
Restricted cash and cash equivalents | 0 | 0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value | 0 | 0
Money market fund | 0 | 0
Total special use funds | 0 | 0
Gas Purchase Contract, Fair Value Disclosure | 4 | 1
Total Assets | 4 | 1
Interest rate swaps | 3 | 7
Gas contracts, Liability | 10 | 41
Liability value | 13 | 48
Recurring [Member] | Level 2 [Member] | PPL Electric Utilities Corp [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | 0 | 0
Total Assets | 0 | 0
Recurring [Member] | Level 2 [Member] | LOUISVILLE GAS And ELECTRIC CO [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | 0 | 0
Restricted cash and cash equivalents | 0 | 0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value | 0 | 0
Total Assets | 0 | 0
Interest rate swaps | 3 | 7
Liability value | 3 | 7
Recurring [Member] | Level 2 [Member] | Kentucky Utilities Co [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | 0 | 0
Restricted cash and cash equivalents | 0 | 0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value | 0 | 0
Total Assets | 0 | 0
Recurring [Member] | Level 3 [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | 0 | 0
Restricted cash and cash equivalents | 0 | 0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value | 0 | 0
Money market fund | 0 | 0
Total special use funds | 0 | 0
Gas Purchase Contract, Fair Value Disclosure | 5 | 0
Total Assets | 5 | 0
Interest rate swaps | 0 | 0
Gas contracts, Liability | 3 | 19
Liability value | 3 | 19
Recurring [Member] | Level 3 [Member] | Gas Contracts |  |
Price risk management liabilities: |  |
Gas Contracts, Liability, Purchases | 2 |
Gas Contracts, Liability, Settlements | 19 |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs | 2 | (19)
Recurring [Member] | Level 3 [Member] | PPL Electric Utilities Corp [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | 0 | 0
Total Assets | 0 | 0
Recurring [Member] | Level 3 [Member] | LOUISVILLE GAS And ELECTRIC CO [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | 0 | 0
Restricted cash and cash equivalents | 0 | 0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value | 0 | 0
Total Assets | 0 | 0
Interest rate swaps | 0 | 0
Liability value | 0 | 0
Recurring [Member] | Level 3 [Member] | Kentucky Utilities Co [Member] |  |
Price risk management liabilities: |  |
Cash and cash equivalents | 0 | 0
Restricted cash and cash equivalents | 0 | 0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value | 0 | 0
Total Assets | 0 | 0
Carrying Amount [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long-term debt | 16,503 | 14,612
Carrying Amount [Member] | PPL Electric Utilities Corp [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long-term debt | 5,214 | 4,567
Carrying Amount [Member] | LOUISVILLE GAS And ELECTRIC CO [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long-term debt | 2,471 | 2,469
Carrying Amount [Member] | Kentucky Utilities Co [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long-term debt | 3,066 | 3,064
Fair Value [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long-term debt | 15,562 | 14,031
Fair Value [Member] | PPL Electric Utilities Corp [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long-term debt | 4,862 | 4,475
Fair Value [Member] | LOUISVILLE GAS And ELECTRIC CO [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long-term debt | 2,295 | 2,369
Fair Value [Member] | Kentucky Utilities Co [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long-term debt | $ 2,750 | $ 2,861

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