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v3.25.2

Derivative Instruments and Hedging Activities - Commodity Purchases (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Commodity Purchases [Line Items] |  |
Derivative Net Liability Position Containing Credit Risk Related Contingency Feature | $ 0 |
Aggregate fair value of additional collateral requirements in the event of a credit downgrade below investment grade | 0 |
Louisville Gas And Electric Co [Member] |  |
Commodity Purchases [Line Items] |  |
Price risk management liabilities | 5 | $ 3
Not Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Liability value | 13 | 16
Asset value | 10 | 9
Not Designated As Hedging Instruments [Member] | Louisville Gas And Electric Co [Member] |  |
Commodity Purchases [Line Items] |  |
Liability value | 5 | 3
Asset value | 0 | 0
Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Liability value | 0 | 0
Asset value | 2 | 0
Other Current Assets | Not Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Asset value | 6 | 7
Other Current Assets | Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Asset value | 2 | 0
Other Current Assets | Gas Contract | Not Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Asset value | 6 | 7
Other Current Assets | Gas Contract | Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Asset value | 0 | 0
Other Current Assets | Interest Rate Swaps [Member] | Not Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Asset value | 0 | 0
Other Current Assets | Interest Rate Swaps [Member] | Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Asset value | 2 | 0
Other Current Liabilities | Not Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Liability value | 3 | 10
Other Current Liabilities | Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Liability value | 0 | 0
Other Current Liabilities | Gas Contract | Not Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Liability value | 3 | 10
Other Current Liabilities | Gas Contract | Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Liability value | 0 | 0
Other Current Liabilities | Interest Rate Swaps [Member] | Not Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Liability value | 0 | 0
Other Current Liabilities | Interest Rate Swaps [Member] | Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Liability value | 0 | 0
Other Noncurrent Assets [Member] | Not Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Asset value | 4 | 2
Other Noncurrent Assets [Member] | Not Designated As Hedging Instruments [Member] | Louisville Gas And Electric Co [Member] |  |
Commodity Purchases [Line Items] |  |
Asset value | 0 | 0
Other Noncurrent Assets [Member] | Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Asset value | 0 | 0
Other Noncurrent Assets [Member] | Gas Contract | Not Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Asset value | 4 | 2
Other Noncurrent Assets [Member] | Gas Contract | Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Asset value | 0 | 0
Other Noncurrent Assets [Member] | Interest Rate Swaps [Member] | Not Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Asset value | 0 | 0
Other Noncurrent Assets [Member] | Interest Rate Swaps [Member] | Not Designated As Hedging Instruments [Member] | Louisville Gas And Electric Co [Member] |  |
Commodity Purchases [Line Items] |  |
Asset value | 0 | 0
Other Noncurrent Assets [Member] | Interest Rate Swaps [Member] | Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Asset value | 0 | 0
Other Noncurrent Liabilities | Not Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Liability value | 10 | 6
Other Noncurrent Liabilities | Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Liability value | 0 | 0
Other Noncurrent Liabilities | Gas Contract | Not Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Liability value | 5 | 3
Other Noncurrent Liabilities | Gas Contract | Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Liability value | 0 | 0
Other Noncurrent Liabilities | Interest Rate Swaps [Member] | Not Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Liability value | 5 | 3
Other Noncurrent Liabilities | Interest Rate Swaps [Member] | Designated As Hedging Instruments [Member] |  |
Commodity Purchases [Line Items] |  |
Liability value | $ 0 | $ 0

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