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v3.20.1

Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Reconciliation of Income Tax Expense [Abstract] |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | $ 146 | $ 124
Increase (decrease) due to: [Abstract] |  |
State income taxes, net of federal income tax benefit | 13 | 13
Valuation allowance adjustments | 6 | 7
Impact of lower U.K. income tax rates relative to U.S. income tax rates | (11) | (8)
Amortization of excess deferred income taxes | (11) | (11)
Other | (3) | 1
Total increase (decrease) | (6) | 2
Total income tax expense (benefit) | 140 | 126
PPL Electric Utilities Corp [Member] |  |
Reconciliation of Income Tax Expense [Abstract] |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | 33 | 34
Increase (decrease) due to: [Abstract] |  |
State income taxes, net of federal income tax benefit | 13 | 13
Amortization of excess deferred income taxes | (3) | (4)
Other | (2) | (1)
Total increase (decrease) | 8 | 8
Total income tax expense (benefit) | 41 | 42
LG And E And KU Energy LLC [Member] |  |
Reconciliation of Income Tax Expense [Abstract] |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | 35 | 33
Increase (decrease) due to: [Abstract] |  |
State income taxes, net of federal income tax benefit | 7 | 6
Amortization of excess deferred income taxes | (7) | (6)
Other | (1) | (1)
Total increase (decrease) | (1) | (1)
Total income tax expense (benefit) | 34 | 32
Louisville Gas And Electric Co [Member] |  |
Reconciliation of Income Tax Expense [Abstract] |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | 19 | 17
Increase (decrease) due to: [Abstract] |  |
State income taxes, net of federal income tax benefit | 4 | 3
Amortization of excess deferred income taxes | (3) | (3)
Other | (1) | 0
Total increase (decrease) | 0 | 0
Total income tax expense (benefit) | 19 | 17
Kentucky Utilities Co [Member] |  |
Reconciliation of Income Tax Expense [Abstract] |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | 21 | 22
Increase (decrease) due to: [Abstract] |  |
State income taxes, net of federal income tax benefit | 4 | 4
Amortization of excess deferred income taxes | (4) | (3)
Other | (1) | (1)
Total increase (decrease) | (1) | 0
Total income tax expense (benefit) | $ 20 | $ 22

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