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Income Taxes (Tables) | 9 Months Ended
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Sep. 30, 2020
Income Taxes [Line Items] |
Schedule of Effective Income Tax Rate Reconciliation | Reconciliations of income tax expense (benefit) for the periods ended September 30 are as follows.
(PPL)
| Three Months |  | Nine Months
| 2020 |  | 2019 |  | 2020 |  | 2019
Federal income tax on Income Before Income Taxes at statutory tax rate - 21% | $ | 103 |  |  | $ | 125 |  |  | $ | 336 |  |  | $ | 359 |
Increase (decrease) due to: |  |  |  |  |  |  |
State income taxes, net of federal income tax benefit | 15 |  |  | 13 |  |  | 39 |  |  | 34 |
Valuation allowance adjustments | 7 |  |  | 7 |  |  | 20 |  |  | 21 |
Impact of lower U.K. income tax rates | 2 |  |  | (6) |  |  | (18) |  |  | (20) |
Impact of the U.K. Finance Acts on deferred tax balances (a) | 104 |  |  | (5) |  |  | 101 |  |  | (8) |
Depreciation and other items not normalized | — |  |  | (2) |  |  | (4) |  |  | (5) |
Amortization of excess deferred federal and state income taxes | (11) |  |  | (9) |  |  | (34) |  |  | (30) |
Federal and state income tax return adjustments | (9) |  |  | — |  |  | (9) |  |  | 1 |
Interest benefit on U.K. financing entities | (3) |  |  | (3) |  |  | (8) |  |  | (9) |
Officers compensation disallowance | 1 |  |  | — |  |  | 5 |  |  | 2 |
Kentucky recycling credit, net of federal income tax expense (b) | — |  |  | — |  |  | — |  |  | (20) |
Other | — |  |  | (2) |  |  | (5) |  |  | 3 |
Total increase (decrease) | 106 |  |  | (7) |  |  | 87 |  |  | (31) |
Total income tax expense (benefit) | $ | 209 |  |  | $ | 118 |  |  | $ | 423 |  |  | $ | 328 |
(a) The U.K. corporation tax rate was scheduled to be reduced from 19% to 17%, effective April 1, 2020. On March 11, 2020, the U.K. Finance Act 2020 included a cancellation of the tax rate reduction to 17%, thereby maintaining the corporation tax rate at 19%. The Finance Act 2020 was formally enacted on July 22, 2020. The primary impact of the cancellation of the corporation tax rate reduction was an increase in deferred tax liabilities and a corresponding deferred tax expense of $106 million. (b) During the second quarter of 2019, LKE recorded a deferred income tax benefit associated with two projects placed into service that prepare a generation waste material for reuse and, as a result, qualify for a Kentucky recycling credit. The applicable credit provides tax benefits for a portion of the equipment costs for major recycling projects in Kentucky. A portion of this amount has been reserved due to insufficient Kentucky taxable income projected at LKE.
PPL Electric Utilities Corp [Member] |
Income Taxes [Line Items] |
Schedule of Effective Income Tax Rate Reconciliation | Reconciliations of income tax expense (benefit) for the periods ended September 30 are as follows.
(PPL Electric) |  |  |  |  |  |  |
| Three Months |  | Nine Months
| 2020 |  | 2019 |  | 2020 |  | 2019
Federal income tax on Income Before Income Taxes at statutory tax rate - 21% | $ | 37 |  |  | $ | 33 |  |  | $ | 104 |  |  | $ | 94 |
Increase (decrease) due to: |  |  |  |  |  |  |
State income taxes, net of federal income tax benefit | 14 |  |  | 13 |  |  | 39 |  |  | 36 |
Federal and state income tax return adjustments | (4) |  |  | — |  |  | (4) |  |  | 1 |
Depreciation and other items not normalized | — |  |  | (2) |  |  | (4) |  |  | (5) |
Amortization of excess deferred federal and state income taxes | (4) |  |  | (4) |  |  | (12) |  |  | (12) |
Other | 1 |  |  | — |  |  | 2 |  |  | — |
Total increase (decrease) | 7 |  |  | 7 |  |  | 21 |  |  | 20 |
Total income tax expense (benefit) | $ | 44 |  |  | $ | 40 |  |  | $ | 125 |  |  | $ | 114 |
LG And E And KU Energy LLC [Member] |
Income Taxes [Line Items] |
Schedule of Effective Income Tax Rate Reconciliation | Reconciliations of income tax expense (benefit) for the periods ended September 30 are as follows.
(LKE) |  |  |  |  |  |  |
| Three Months |  | Nine Months
| 2020 |  | 2019 |  | 2020 |  | 2019
Federal income tax on Income Before Income Taxes at statutory tax rate - 21% | $ | 35 |  |  | $ | 42 |  |  | $ | 92 |  |  | $ | 98 |
Increase (decrease) due to: |  |  |  |  |  |  |
State income taxes, net of federal income tax benefit | 7 |  |  | 8 |  |  | 17 |  |  | 18 |
Amortization of investment tax credit | (1) |  |  | (1) |  |  | (2) |  |  | (2) |
Valuation allowance adjustments (a) | — |  |  | — |  |  | — |  |  | 3 |
Amortization of excess deferred federal and state income taxes | (7) |  |  | (5) |  |  | (20) |  |  | (17) |
Federal and state income tax return adjustments | (5) |  |  | 1 |  |  | (5) |  |  | 1 |
Kentucky recycling credit, net of federal income tax expense (a) | — |  |  | — |  |  | — |  |  | (20) |
Other | 2 |  |  | (2) |  |  | — |  |  | (3) |
Total increase (decrease) | (4) |  |  | 1 |  |  | (10) |  |  | (20) |
Total income tax expense (benefit) | $ | 31 |  |  | $ | 43 |  |  | $ | 82 |  |  | $ | 78 |
(a)During the second quarter of 2019, LKE recorded a deferred income tax benefit associated with two projects placed into service that prepare a generation waste material for reuse and, as a result, qualify for a Kentucky recycling credit. The applicable credit provides tax benefits for a portion of the equipment costs for major recycling projects in Kentucky. A portion of this amount has been reserved due to insufficient Kentucky taxable income projected at LKE.
Louisville Gas And Electric Co [Member] |
Income Taxes [Line Items] |
Schedule of Effective Income Tax Rate Reconciliation | Reconciliations of income tax expense (benefit) for the periods ended September 30 are as follows.
(LG&E) |  |  |  |  |  |  |
| Three Months |  | Nine Months
| 2020 |  | 2019 |  | 2020 |  | 2019
Federal income tax on Income Before Income Taxes at statutory tax rate - 21% | $ | 18 |  |  | $ | 21 |  |  | $ | 50 |  |  | $ | 50 |
Increase (decrease) due to: |  |  |  |  |  |  |
State income taxes, net of federal income tax benefit | 3 |  |  | 4 |  |  | 9 |  |  | 9 |
Valuation allowance adjustments (a) | — |  |  | — |  |  | — |  |  | 15 |
Amortization of excess deferred federal and state income taxes | (3) |  |  | (2) |  |  | (8) |  |  | (7) |
Federal and state income tax return adjustments | (2) |  |  | 1 |  |  | (2) |  |  | 1 |
Kentucky recycling credit, net of federal income tax expense (a) | — |  |  | — |  |  | — |  |  | (15) |
Other | — |  |  | (2) |  |  | (2) |  |  | (2) |
Total increase (decrease) | (2) |  |  | 1 |  |  | (3) |  |  | 1 |
Total income tax expense (benefit) | $ | 16 |  |  | $ | 22 |  |  | $ | 47 |  |  | $ | 51 |
(a)During the second quarter of 2019, LG&E recorded a deferred income tax benefit associated with two projects placed into service that prepare a generation waste material for reuse and, as a result, qualify for a Kentucky recycling credit. The applicable credit provides tax benefits for a portion of the equipment costs for major recycling projects in Kentucky. This amount has been reserved due to insufficient Kentucky taxable income projected at LG&E.
Kentucky Utilities Co [Member] |
Income Taxes [Line Items] |
Schedule of Effective Income Tax Rate Reconciliation | Reconciliations of income tax expense (benefit) for the periods ended September 30 are as follows.
(KU) |  |  |  |  |  |  |
| Three Months |  | Nine Months
| 2020 |  | 2019 |  | 2020 |  | 2019
Federal income tax on Income Before Income Taxes at statutory tax rate - 21% | $ | 22 |  |  | $ | 25 |  |  | $ | 56 |  |  | $ | 63 |
Increase (decrease) due to: |  |  |  |  |  |  |
State income taxes, net of federal income tax benefit | 4 |  |  | 5 |  |  | 11 |  |  | 12 |
Valuation allowance adjustments (a) | — |  |  | — |  |  | — |  |  | 5 |
Amortization of excess deferred federal and state income taxes | (4) |  |  | (3) |  |  | (12) |  |  | (10) |
Federal and state income tax return adjustments | (3) |  |  | — |  |  | (3) |  |  | — |
Kentucky recycling credit, net of federal income tax expense (a) | — |  |  | — |  |  | — |  |  | (5) |
Other | — |  |  | (1) |  |  | (2) |  |  | (3) |
Total increase (decrease) | (3) |  |  | 1 |  |  | (6) |  |  | (1) |
Total income tax expense (benefit) | $ | 19 |  |  | $ | 26 |  |  | $ | 50 |  |  | $ | 62 |
(a)During the second quarter of 2019, KU recorded a deferred income tax benefit associated with a project placed into service that prepares a generation waste material for reuse and, as a result, qualifies for a Kentucky recycling credit. The applicable credit provides tax benefits for a portion of the equipment costs for major recycling projects in Kentucky. This amount has been reserved due to insufficient Kentucky taxable income projected at KU.

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