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Fair Value Measurements | 12 Months Ended
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Dec. 31, 2024
Fair Value Disclosures [Abstract] |
Fair Value Measurements and Credit Concentration | (All Registrants) Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (an exit price). A market approach (generally, data from market transactions), an income approach (generally, present value techniques and option-pricing models), and/or a cost approach (generally, replacement cost) are used to measure the fair value of an asset or liability, as appropriate. These valuation approaches incorporate inputs such as observable, independent market data and/or unobservable data that management believes are predicated on the assumptions market participants would use to price an asset or liability. These inputs may incorporate, as applicable, certain risks such as nonperformance risk, which includes credit risk. The fair value of a group of financial assets and liabilities is measured on a net basis. See Note 1 for information on the levels in the fair value hierarchy. Recurring Fair Value Measurements 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. 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 |
Special Use Funds (PPL) The special use funds are investments restricted for paying active union employee medical costs. In 2018, PPL received a favorable private letter ruling from the IRS permitting a transfer of excess funds from the PPL Bargaining Unit Retiree Health Plan VEBA to a new subaccount within the VEBA to be used to pay medical claims of active bargaining unit employees. In 2024, additional excess funds were removed from the PPL Bargaining Unit Retiree Health Plan VEBA and deposited in the existing subaccount within the VEBA to be used to pay medical claims of active bargaining unit employees. The funds are invested primarily in commingled debt and equity funds measured at NAV and are classified as investments in equity securities. Changes in the fair value of the funds are recorded to the Statements of Income. Price Risk Management Assets/Liabilities Interest Rate Swaps (PPL, LG&E and KU) To manage interest rate risk, PPL, LG&E and KU use interest rate contracts such as forward-starting swaps, floating-to-fixed swaps and fixed-to-floating swaps. An income approach is used to measure the fair value of these contracts, utilizing readily observable inputs, such as forward interest rates (e.g., SOFR and government security rates), as well as inputs that may not be observable, such as credit valuation adjustments. In certain cases, market information cannot practicably be obtained to value credit risk and therefore internal models are relied upon. These models use projected probabilities of default and estimated recovery rates based on historical observances. When the credit valuation adjustment is significant to the overall valuation, the contracts are classified as Level 3. Gas Contracts (PPL) To manage gas commodity price risk associated with natural gas purchases, RIE utilizes over-the-counter (OTC) gas swaps contracts with pricing inputs obtained from the New York Mercantile Exchange (NYMEX) and the Intercontinental Exchange (ICE), except in cases where the ICE publishes seasonal averages or where there were no transactions within the last seven days. RIE may utilize discounting based on quoted interest rate curves, including consideration of non-performance risk, and may include a liquidity reserve calculated based on bid/ask spread. Substantially all of these price curves are observable in the marketplace throughout at least 95% of the remaining contractual quantity, or they could be constructed from market observable curves with correlation coefficients of 95% or higher. These contracts are classified as Level 2. RIE also utilizes gas option and purchase and capacity transactions, which are valued based on internally developed models. Industry-standard valuation techniques, such as the Black-Scholes pricing model, are used for valuing such instruments. For valuations that include both observable and unobservable inputs, if the unobservable input is determined to be significant to the overall inputs, the entire valuation is classified as Level 3. This includes derivative instruments valued using indicative price quotations whose contract tenure extends into unobservable periods. In instances where observable data is unavailable, consideration is given to the assumptions that market participants would use in valuing the asset or liability. This includes assumptions about market risks such as liquidity, volatility, and contract duration. Such instruments are classified as in Level 3 as the model inputs generally are not observable. RIE considers non-performance risk and liquidity risk in the valuation of derivative instruments classified as Level 2 and Level 3. The significant unobservable inputs used in the fair value measurement of the gas derivative instruments are implied volatility and gas forward curves. A relative change in commodity price at various locations underlying the open positions can result in significantly different fair value estimates. Financial Instruments Not Recorded at Fair Value (All Registrants) The carrying amounts of long-term debt on the Balance Sheets and their estimated fair values are set forth below. Long-term debt is classified as Level 2. The effect of third-party credit enhancements is not included in the fair value measurement.
| 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. The carrying amounts of other current financial instruments (except for long-term debt due within one year) approximate their fair values because of their short-term nature.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 107 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-107 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 940 -SubTopic 820 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478119/940-820-50-1 + Details
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