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Fair Value Measurements - Financial Instruments Not Recorded at Fair Value (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
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Carrying Amount [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | $ 15,757 | $ 14,612
Fair Value [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | 14,794 | 14,031
PPL Electric Utilities Corp [Member] | Carrying Amount [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | 5,212 | 4,567
PPL Electric Utilities Corp [Member] | Fair Value [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | 4,929 | 4,475
Louisville Gas And Electric Co [Member] | Carrying Amount [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | 2,470 | 2,469
Louisville Gas And Electric Co [Member] | Fair Value [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | 2,301 | 2,369
Kentucky Utilities Co [Member] | Carrying Amount [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | 3,065 | 3,064
Kentucky Utilities Co [Member] | Fair Value [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | $ 2,765 | $ 2,861

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