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v3.25.2

Derivative Instruments and Hedging Activities - Offsetting Derivative Instruments and Credit Risk-Related Features (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Assets [Abstract] |  |
Cash collateral received - eligible for offset | $ 0 | $ 0
Liabilities [Abstract] |  |
Cash collateral pledged - eligible for offset | 0 | 0
Credit Risk-Related Contingent Features [Abstract] |  |
Aggregate fair value of additional collateral requirements in the event of a credit downgrade below investment grade | 0 |
Treasury Derivatives [Member] |  |
Assets [Abstract] |  |
Gross | 12 | 9
Derivative instruments - eligible for offset | 3 | 5
Cash collateral received - eligible for offset | 0 | 0
Net | 9 | 4
Liabilities [Abstract] |  |
Gross | 13 | 16
Derivative instruments - eligible for offset | 3 | 5
Cash collateral pledged - eligible for offset | 0 | 0
Net | 10 | 11
Louisville Gas And Electric Co [Member] |  |
Assets [Abstract] |  |
Cash collateral received - eligible for offset | 0 | 0
Liabilities [Abstract] |  |
Cash collateral pledged - eligible for offset | 0 | 0
Louisville Gas And Electric Co [Member] | Treasury Derivatives [Member] |  |
Assets [Abstract] |  |
Gross | 0 | 0
Derivative instruments - eligible for offset | 0 | 0
Cash collateral received - eligible for offset | 0 | 0
Net | 0 | 0
Liabilities [Abstract] |  |
Gross | 5 | 3
Derivative instruments - eligible for offset | 0 | 0
Cash collateral pledged - eligible for offset | 0 | 0
Net | $ 5 | $ 3

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