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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Reconciliation of Income Tax Expense [Abstract] |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | $ 81 | $ 76
Increase (decrease) due to: [Abstract] |  |
State income taxes, net of federal income tax benefit | 17 | 22
Depreciation and other items not normalized | (5) | (5)
Amortization of excess deferred income taxes | (13) | (12)
Other | 1 | (2)
Total increase (decrease) | 0 | 3
Total income tax expense (benefit) | 81 | 79
PPL Electric Utilities Corp [Member] |  |
Reconciliation of Income Tax Expense [Abstract] |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | 41 | 38
Increase (decrease) due to: [Abstract] |  |
State income taxes, net of federal income tax benefit | 14 | 14
Depreciation and other items not normalized | (4) | (4)
Amortization of excess deferred income taxes | (2) | (2)
Other | (1) | (1)
Total increase (decrease) | 7 | 7
Total income tax expense (benefit) | 48 | 45
Louisville Gas And Electric Co [Member] |  |
Reconciliation of Income Tax Expense [Abstract] |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | 25 | 23
Increase (decrease) due to: [Abstract] |  |
State income taxes, net of federal income tax benefit | 4 | 4
Amortization of excess deferred income taxes | (3) | (3)
Other | (2) | (1)
Total increase (decrease) | (1) | 0
Total income tax expense (benefit) | 24 | 23
Kentucky Utilities Co [Member] |  |
Reconciliation of Income Tax Expense [Abstract] |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | 28 | 23
Increase (decrease) due to: [Abstract] |  |
State income taxes, net of federal income tax benefit | 5 | 4
Amortization of excess deferred income taxes | (5) | (4)
Other | (1) | (1)
Total increase (decrease) | (1) | (1)
Total income tax expense (benefit) | $ 27 | $ 22

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