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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2024
Fair Value [Line Items] |
Fair Value of Assets and Liabilities Measured on Recurring Basis | The assets and liabilities measured at fair value were:
| December 31, 2024 |  | December 31, 2023
| Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3
PPL |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 306 |  |  | $ | 306 |  |  | $ | — |  |  | $ | — |  |  | $ | 331 |  |  | $ | 331 |  |  | $ | — |  |  | $ | — |
Restricted cash and cash equivalents (a) | 33 |  |  | 33 |  |  | — |  |  | — |  |  | 51 |  |  | 51 |  |  | — |  |  | — |
Total Cash, Cash Equivalents and Restricted Cash (b) | 339 |  |  | 339 |  |  | — |  |  | — |  |  | 382 |  |  | 382 |  |  | — |  |  | — |
Special use funds (a): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market fund | 1 |  |  | 1 |  |  | — |  |  | — |  |  | 1 |  |  | 1 |  |  | — |  |  | — |
Commingled debt fund measured at NAV (c) | 10 |  |  | — |  |  | — |  |  | — |  |  | 9 |  |  | — |  |  | — |  |  | — |
Commingled equity fund measured at NAV (c) | 8 |  |  | — |  |  | — |  |  | — |  |  | 8 |  |  | — |  |  | — |  |  | — |
Total special use funds | 19 |  |  | 1 |  |  | — |  |  | — |  |  | 18 |  |  | 1 |  |  | — |  |  | — |
| December 31, 2024 |  | December 31, 2023
| Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3
Price risk management assets (d): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gas contracts | 9 |  |  | — |  |  | 4 |  |  | 5 |  |  | 1 |  |  | — |  |  | 1 |  |  | — |
Total assets | $ | 367 |  |  | $ | 340 |  |  | $ | 4 |  |  | $ | 5 |  |  | $ | 401 |  |  | $ | 383 |  |  | $ | 1 |  |  | $ | — |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Price risk management liabilities (d): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps | $ | 3 |  |  | $ | — |  |  | $ | 3 |  |  | $ | — |  |  | $ | 7 |  |  | $ | — |  |  | $ | 7 |  |  | $ | — |
Gas contracts | 13 |  |  | — |  |  | 10 |  |  | 3 |  |  | 60 |  |  | — |  |  | 41 |  |  | 19 |
Total price risk management liabilities | $ | 16 |  |  | $ | — |  |  | $ | 13 |  |  | $ | 3 |  |  | $ | 67 |  |  | $ | — |  |  | $ | 48 |  |  | $ | 19 |
PPL Electric |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 24 |  |  | $ | 24 |  |  | $ | — |  |  | $ | — |  |  | $ | 51 |  |  | $ | 51 |  |  | $ | — |  |  | $ | — |
Total assets | $ | 24 |  |  | $ | 24 |  |  | $ | — |  |  | $ | — |  |  | $ | 51 |  |  | $ | 51 |  |  | $ | — |  |  | $ | — |
LG&E |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 8 |  |  | $ | 8 |  |  | $ | — |  |  | $ | — |  |  | $ | 18 |  |  | $ | 18 |  |  | $ | — |  |  | $ | — |
Restricted cash and cash equivalents (a) | 16 |  |  | 16 |  |  | — |  |  | — |  |  | 26 |  |  | 26 |  |  | — |  |  | — |
Total Cash, Cash Equivalents and Restricted Cash (b) | 24 |  |  | 24 |  |  | — |  |  | — |  |  | 44 |  |  | 44 |  |  | — |  |  | — |
Total assets | $ | 24 |  |  | $ | 24 |  |  | $ | — |  |  | $ | — |  |  | $ | 44 |  |  | $ | 44 |  |  | $ | — |  |  | $ | — |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Price risk management liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps | $ | 3 |  |  | $ | — |  |  | $ | 3 |  |  | $ | — |  |  | $ | 7 |  |  | $ | — |  |  | $ | 7 |  |  | $ | — |
Total price risk management liabilities | $ | 3 |  |  | $ | — |  |  | $ | 3 |  |  | $ | — |  |  | $ | 7 |  |  | $ | — |  |  | $ | 7 |  |  | $ | — |
KU |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 13 |  |  | $ | 13 |  |  | $ | — |  |  | $ | — |  |  | $ | 14 |  |  | $ | 14 |  |  | $ | — |  |  | $ | — |
Restricted cash and cash equivalents (a) | 16 |  |  | 16 |  |  | — |  |  | — |  |  | 24 |  |  | 24 |  |  | — |  |  | — |
Total Cash, Cash Equivalents and Restricted Cash (b) | 29 |  |  | 29 |  |  | — |  |  | — |  |  | 38 |  |  | 38 |  |  | — |  |  | — |
Total assets | $ | 29 |  |  | $ | 29 |  |  | $ | — |  |  | $ | — |  |  | $ | 38 |  |  | $ | 38 |  |  | $ | — |  |  | $ | — |
(a)Current portion is included in "Other current assets" and noncurrent portion is included in "Other noncurrent assets" on the Balance Sheets. (b)Total Cash, Cash Equivalents and Restricted Cash provides a reconciliation of these items reported within the Balance Sheets to the sum shown on the Statements of Cash Flows. (c)In accordance with accounting guidance, certain investments that are measured at fair value using net asset value per share (NAV), or its equivalent, have not been classified in the fair value hierarchy. The fair value amounts presented in the table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the statement of financial position. (d)Current portion is included in "Other current assets" and "Other current liabilities" and noncurrent portion is included in "Other noncurrent assets" "Other deferred credits and noncurrent liabilities" on the Balance Sheets.
Fair Value of Financial Instruments Not Recorded at Fair Value - Other | The carrying amounts of long-term debt on the Balance Sheets and their estimated fair values are set forth below.
| December 31, 2024 |  | December 31, 2023
| Carrying Amount (a) |  | Fair Value |  | Carrying Amount (a) |  | Fair Value
PPL | $ | 16,503 |  |  | $ | 15,562 |  |  | $ | 14,612 |  |  | $ | 14,031 |
PPL Electric | 5,214 |  |  | 4,862 |  |  | 4,567 |  |  | 4,475 |
LG&E | 2,471 |  |  | 2,295 |  |  | 2,469 |  |  | 2,369 |
KU | 3,066 |  |  | 2,750 |  |  | 3,064 |  |  | 2,861 |
(a)Amounts are net of debt issuance costs.
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation | A reconciliation of net assets classified as Level 3 for the year ended December 31 is as follows:
| Gas Contracts
2024 |
Balance at beginning of period | $ | (19) |
Total unrealized gains (losses) recognized as Regulatory Assets/Regulatory Liabilities | 2 |
Settlements | 19 |
Balance at end of period | $ | 2 |

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