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Utility Rate Regulation (Regulatory Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | $ 376 | $ 223
Noncurrent regulatory liabilities | 3,318 | 3,335
Generation Supply Charge [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 45 | 52
Environmental Cost Recovery [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 6 | 12
Universal Service Rider [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 17 | 3
Transmission Formula Rate [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 62 | 1
Accumulated cost of removal of utility plant [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 1,043 | 1,022
Net deferred taxes [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 1,798 | 1,899
Defined Benefit Plans [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 342 | 294
Terminated interest rate swaps [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 52 | 54
Other Regulatory Liabilities [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 3 | 32
Noncurrent regulatory liabilities | 53 | 53
Transmission Service Charge [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 17 | 0
Rate adjustment mechanism |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 124 | 71
Energy efficiency |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 26 | 25
Demand Side Management |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 21 | 17
Revenue Decoupling Mechanism |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 55 | 10
Advanced metering Infrastructure |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 30 | 13
PPL Electric Utilities Corp [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 103 | 57
Noncurrent regulatory liabilities | 828 | 839
PPL Electric Utilities Corp [Member] | Generation Supply Charge [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 45 | 52
PPL Electric Utilities Corp [Member] | Environmental Cost Recovery [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
PPL Electric Utilities Corp [Member] | Universal Service Rider [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 17 | 3
PPL Electric Utilities Corp [Member] | Transmission Formula Rate [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 23 | 0
PPL Electric Utilities Corp [Member] | Accumulated cost of removal of utility plant [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 0 | 0
PPL Electric Utilities Corp [Member] | Net deferred taxes [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 708 | 739
PPL Electric Utilities Corp [Member] | Defined Benefit Plans [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 120 | 100
PPL Electric Utilities Corp [Member] | Terminated interest rate swaps [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 0 | 0
PPL Electric Utilities Corp [Member] | Other Regulatory Liabilities [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 1 | 2
Noncurrent regulatory liabilities | 0 | 0
PPL Electric Utilities Corp [Member] | Transmission Service Charge [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 17 | 0
PPL Electric Utilities Corp [Member] | Rate adjustment mechanism |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
PPL Electric Utilities Corp [Member] | Energy efficiency |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
PPL Electric Utilities Corp [Member] | Demand Side Management |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
PPL Electric Utilities Corp [Member] | Revenue Decoupling Mechanism |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
PPL Electric Utilities Corp [Member] | Advanced metering Infrastructure |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 0 | 0
Louisville Gas And Electric Co [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 13 | 14
Noncurrent regulatory liabilities | 809 | 815
Louisville Gas And Electric Co [Member] | Generation Supply Charge [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Louisville Gas And Electric Co [Member] | Environmental Cost Recovery [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 3 | 6
Louisville Gas And Electric Co [Member] | Universal Service Rider [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Louisville Gas And Electric Co [Member] | Transmission Formula Rate [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Louisville Gas And Electric Co [Member] | Accumulated cost of removal of utility plant [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 334 | 314
Louisville Gas And Electric Co [Member] | Net deferred taxes [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 415 | 439
Louisville Gas And Electric Co [Member] | Defined Benefit Plans [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 23 | 24
Louisville Gas And Electric Co [Member] | Terminated interest rate swaps [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 26 | 27
Louisville Gas And Electric Co [Member] | Other Regulatory Liabilities [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 2 | 1
Noncurrent regulatory liabilities | 1 | 7
Louisville Gas And Electric Co [Member] | Transmission Service Charge [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Louisville Gas And Electric Co [Member] | Rate adjustment mechanism |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Louisville Gas And Electric Co [Member] | Energy efficiency |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Louisville Gas And Electric Co [Member] | Demand Side Management |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 8 | 7
Louisville Gas And Electric Co [Member] | Revenue Decoupling Mechanism |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Louisville Gas And Electric Co [Member] | Advanced metering Infrastructure |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 10 | 4
Kentucky Utilities Co [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 16 | 22
Noncurrent regulatory liabilities | 997 | 1,009
Kentucky Utilities Co [Member] | Generation Supply Charge [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Kentucky Utilities Co [Member] | Environmental Cost Recovery [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 3 | 6
Kentucky Utilities Co [Member] | Universal Service Rider [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Kentucky Utilities Co [Member] | Transmission Formula Rate [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Kentucky Utilities Co [Member] | Accumulated cost of removal of utility plant [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 415 | 408
Kentucky Utilities Co [Member] | Net deferred taxes [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 467 | 498
Kentucky Utilities Co [Member] | Defined Benefit Plans [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 69 | 65
Kentucky Utilities Co [Member] | Terminated interest rate swaps [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 26 | 27
Kentucky Utilities Co [Member] | Other Regulatory Liabilities [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 6
Noncurrent regulatory liabilities | 0 | 2
Kentucky Utilities Co [Member] | Transmission Service Charge [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Kentucky Utilities Co [Member] | Rate adjustment mechanism |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Kentucky Utilities Co [Member] | Energy efficiency |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Kentucky Utilities Co [Member] | Demand Side Management |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 13 | 10
Kentucky Utilities Co [Member] | Revenue Decoupling Mechanism |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Kentucky Utilities Co [Member] | Advanced metering Infrastructure |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | $ 20 | $ 9

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