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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Reconciliation of Income Tax Expense [Abstract] |  |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | $ 57 | $ 60 | $ 189 | $ 167
Increase (decrease) due to: [Abstract] |  |  |  |
State income taxes, net of federal income tax benefit | 20 | 16 | 48 | 49
Depreciation and other items not normalized | (4) | (2) | (14) | (9)
Effective Income Tax Rate Reconciliation, Tax Credit, Amount | (2) | (9) | (4) | (11)
Amortization of excess deferred income taxes | (13) | (13) | (33) | (33)
Other | 0 | 6 | 3 | 7
Total increase (decrease) | 1 | (2) | 0 | 3
Total income tax expense (benefit) | 58 | 58 | 189 | 170
PPL Electric Utilities Corp [Member] |  |  |  |
Reconciliation of Income Tax Expense [Abstract] |  |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | 40 | 38 | 122 | 107
Increase (decrease) due to: [Abstract] |  |  |  |
State income taxes, net of federal income tax benefit | 13 | 13 | 39 | 36
Depreciation and other items not normalized | (2) | (1) | (12) | (8)
Amortization of excess deferred income taxes | (3) | (4) | (8) | (8)
Other | (1) | (3) | 0 | (1)
Total increase (decrease) | 7 | 5 | 19 | 19
Total income tax expense (benefit) | 47 | 43 | 141 | 126
Louisville Gas And Electric Co [Member] |  |  |  |
Reconciliation of Income Tax Expense [Abstract] |  |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | 20 | 21 | 62 | 56
Increase (decrease) due to: [Abstract] |  |  |  |
State income taxes, net of federal income tax benefit | 4 | 4 | 11 | 10
Amortization of excess deferred income taxes | (3) | (3) | (9) | (9)
Other | (1) | (1) | (3) | (2)
Total increase (decrease) | 0 | 0 | (1) | (1)
Total income tax expense (benefit) | 20 | 21 | 61 | 55
Kentucky Utilities Co [Member] |  |  |  |
Reconciliation of Income Tax Expense [Abstract] |  |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | 26 | 26 | 74 | 63
Increase (decrease) due to: [Abstract] |  |  |  |
State income taxes, net of federal income tax benefit | 4 | 5 | 13 | 12
Amortization of excess deferred income taxes | (4) | (5) | (13) | (13)
Other | (2) | (2) | (4) | (3)
Total increase (decrease) | (2) | (2) | (4) | (4)
Total income tax expense (benefit) | $ 24 | $ 24 | $ 70 | $ 59

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- Definition The portion of the difference between total income tax expense (benefit) as reported in the Income Statement for the current period and the expected income tax expense (benefit) computed attributable to the amortization of excess deferred income taxes due to a change in the federal corporate income tax rate. + References No definition available. + Details
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