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Derivative Instruments and Hedging Activities (Intro) (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Louisville Gas And Electric Co [Member] |  |
Master Netting Arrangements (Numeric) [Line Items] |  |
Cash Collateral Obligation Under Master Netting Arrangement | $ 0 | $ 0
Cash Collateral Posted Under Master Netting Arrangements | 0 | 0
Kentucky Utilities Co [Member] |  |
Master Netting Arrangements (Numeric) [Line Items] |  |
Cash Collateral Obligation Under Master Netting Arrangement | 0 | 0
Cash Collateral Posted Under Master Netting Arrangements | $ 0 | $ 0

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