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Income and Other Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Taxes [Line Items] |
Tax Reform | The final amounts reported in PPL's 2017 federal income tax return, provisional amounts for the year ended December 31, 2017, the related measurement period adjustments, and the resulting tax impact for the year ended December 31,2018 are as follows.
| Taxable Income (Loss) (a)
| Adjustments per 2017 Tax Return |  | Adjustments per 2017 Tax Provision |  | 2018 Adjustments
PPL |  |  |  |  |
Deemed Dividend | $ | 397 |  |  | $ | 462 |  |  | $ | (65 | )
Bonus Depreciation (b) | (67 | ) |  | — |  |  | (67 | )
Consolidated Federal Net Operating Loss due to the TCJA (c) | (330 | ) |  | (462 | ) |  | 132 |
Total | $ | — |  |  | $ | — |  |  | $ | — |
PPL Electric |  |  |  |  |
Bonus Depreciation (b) | $ | (39 | ) |  | $ | — |  |  | $ | (39 | )
Consolidated Federal Net Operating Loss reallocated due to the TCJA (c) | (68 | ) |  | (105 | ) |  | 37 |
Total | $ | (107 | ) |  | $ | (105 | ) |  | $ | (2 | )
LKE |  |  |  |  |
Bonus Depreciation (b) | $ | (28 | ) |  | $ | — |  |  | $ | (28 | )
Consolidated Federal Net Operating Loss reallocated due to the TCJA (c) | (32 | ) |  | (45 | ) |  | 13 |
Total | $ | (60 | ) |  | $ | (45 | ) |  | $ | (15 | )
LG&E |  |  |  |  |
Bonus Depreciation (b) | $ | (17 | ) |  | $ | — |  |  | $ | (17 | )
Consolidated Federal Net Operating Loss reallocated due to the TCJA (c) | 17 |  |  | — |  |  | 17 |
Total | $ | — |  |  | $ | — |  |  | $ | — |
KU |  |  |  |  |
Bonus Depreciation (b) | $ | (11 | ) |  | $ | — |  |  | $ | (11 | )
Consolidated Federal Net Operating Loss reallocated due to the TCJA (c) | 11 |  |  | — |  |  | 11 |
Total | $ | — |  |  | $ | — |  |  | $ | — |
(a) | The above table reflects, for each item, the amount subject to change as a result of the TCJA and does not reflect the total amount of each item included in the return and the provision.
(b) | The TCJA increased the bonus depreciation percentage from 50% to 100% for qualified property acquired and placed in service after September 27, 2017 and before January 1, 2018. Increases in tax depreciation reduce the Registrants' taxes payable and increase net deferred tax liabilities with no impact to “Income Taxes” on the Statements of Income.
(c) | An increase in the consolidated federal net operating loss reduces net deferred tax liabilities with the opposite effect if there is a decrease in the consolidated federal net operating loss. These increases or decreases have no impact to “Income Taxes” on the Statements of Income.
| Income Tax Expense (Benefit)
| Adjustments per 2017 Tax Return |  | Adjustments per 2017 Tax Provision |  | 2018 Adjustments
PPL |  |  |  |  |
Deemed Dividend | $ | 139 |  |  | $ | 161 |  |  | $ | (22 | )
Foreign Tax Credits | (157 | ) |  | (205 | ) |  | 48 |
Valuation of Foreign Tax Credit Carryforward | 110 |  |  | 145 |  |  | (35 | )
Reduction in U.S. federal income tax rate | 229 |  |  | 220 |  |  | 9 |
Total | $ | 321 |  |  | $ | 321 |  |  | $ | — |
PPL Electric |  |  |  |  |
Reduction in U.S. federal income tax rate | $ | (13 | ) |  | $ | (13 | ) |  | $ | — |
LKE |  |  |  |  |
Reduction in U.S. federal income tax rate | $ | 110 |  |  | $ | 112 |  |  | $ | (2 | )
The Registrants' accounting related to the effects of the TCJA on financial results for the period ended December 31, 2017 is complete as of December 31, 2018 with respect to all provisional amounts. The Balance Sheets at December 31, 2017 reflect the increase to the Registrants' net regulatory liabilities as a result of the TCJA as follows:
| PPL |  | PPL Electric |  | LKE |  | LG&E |  | KU
Net Increase in Regulatory Liabilities | $ | 2,185 |  |  | $ | 1,019 |  |  | $ | 1,166 |  |  | $ | 532 |  |  | $ | 634 |
The tax rate reduction impacts on non-regulated deferred tax assets and liabilities were recorded as an adjustment to the Registrants' deferred tax provisions, and have been reflected in "Income Taxes" on the Statement of Income for the year ended December 31, 2017 as follows:
| PPL |  | PPL Electric |  | LKE |  | LG&E |  | KU
Income tax expense (benefit) | $ | 220 |  |  | $ | (13 | ) |  | $ | 112 |  |  | $ | — |  |  | $ | — |
Under GAAP, the tax effect of changes in tax laws must be recognized in the period in which the law is enacted, or December 2017 for the TCJA. The changes enacted by the TCJA were recorded as an adjustment to the Registrants' deferred tax provisions, and have been reflected in "Income Taxes" on the Statement of Income for the year ended December 31, 2017 as follows:
| PPL |  | PPL Electric |  | LKE |  | LG&E |  | KU
Income tax expense (benefit) | $ | 321 |  |  | $ | (13 | ) |  | $ | 112 |  |  | $ | — |  |  | $ | — |
Components of Income (Loss) Before Income Taxes | "Income Before Income Taxes" included the following:
| 2018 |  | 2017 |  | 2016
Domestic income | $ | 1,127 |  |  | $ | 874 |  |  | $ | 1,463 |
Foreign income | 1,158 |  |  | 1,038 |  |  | 1,087 |
Total | $ | 2,285 |  |  | $ | 1,912 |  |  | $ | 2,550 |
Components of Deferred Tax Assets and Liabilities | Significant components of PPL's deferred income tax assets and liabilities were as follows:
| 2018 |  | 2017
Deferred Tax Assets |  |  |
Deferred investment tax credits | $ | 31 |  |  | $ | 33 |
Regulatory liabilities | 87 |  |  | 68 |
Income taxes due to customer | 479 |  |  | 499 |
Accrued pension and postretirement costs | 277 |  |  | 232 |
Federal loss carryforwards | 325 |  |  | 356 |
State loss carryforwards | 419 |  |  | 409 |
Federal and state tax credit carryforwards | 392 |  |  | 455 |
Foreign capital loss carryforwards | 313 |  |  | 329 |
Foreign loss carryforwards | 1 |  |  | 2 |
Foreign - regulatory obligations | — |  |  | 2 |
Foreign - other | 9 |  |  | 7 |
Contributions in aid of construction | 139 |  |  | 134 |
Domestic - other | 81 |  |  | 102 |
Unrealized losses on qualifying derivatives | 7 |  |  | 10 |
Valuation allowances | (808 | ) |  | (838 | )
Total deferred tax assets | 1,752 |  |  | 1,800 |
Deferred Tax Liabilities |  |  |
Domestic plant - net | 3,359 |  |  | 3,168 |
Regulatory assets | 314 |  |  | 288 |
Reacquired debt costs | 12 |  |  | 15 |
Foreign plant - net | 724 |  |  | 726 |
Foreign - pensions | 83 |  |  | 32 |
Domestic - other | 28 |  |  | 9 |
Total deferred tax liabilities | 4,520 |  |  | 4,238 |
Net deferred tax liability | $ | 2,768 |  |  | $ | 2,438 |
Summary of Operating Loss Carryforwards and Tax Credit Carryforwards | At December 31, 2018, PPL had the following loss and tax credit carryforwards, related deferred tax assets and valuation allowances recorded against the deferred tax assets.
| Gross |  | Deferred Tax Asset |  | Valuation Allowance |  | Expiration
Loss carryforwards |  |  |  |  |  |  |
Federal net operating losses | $ | 1,519 |  |  | $ | 319 |  |  | $ | — |  |  | 2031-2037
Federal charitable contributions | 29 |  |  | 6 |  |  | — |  |  | 2020-2022
State net operating losses | 5,725 |  |  | 418 |  |  | (370 | ) |  | 2019-2038
State charitable contributions | 7 |  |  | 1 |  |  | — |  |  | 2020-2022
Foreign net operating losses | 6 |  |  | 1 |  |  | — |  |  | Indefinite
Foreign capital losses | 1,842 |  |  | 313 |  |  | (313 | ) |  | Indefinite
Credit carryforwards |  |  |  |  |  |  |
Federal investment tax credit |  |  | 133 |  |  | — |  |  | 2025-2036
Federal alternative minimum tax credit (a) |  |  | 15 |  |  | — |  |  | Indefinite
Federal foreign tax credits (b) |  |  | 218 |  |  | (113 | ) |  | 2024-2027
Federal - other |  |  | 25 |  |  | (8 | ) |  | 2019-2038
State - other |  |  | 1 |  |  | — |  |  | Indefinite
(a) | The TCJA repealed the corporate alternative minimum tax (AMT) for tax years beginning after December 31, 2017. The existing indefinite carryforward period for AMT credits was retained.
(b) | Includes $62 million of foreign tax credits carried forward from 2016 and $156 million of additional foreign tax credits from 2017 related to the taxable deemed dividend associated with the TCJA.
Schedule of Valuation and Qualifying Accounts of Deferred Tax Assets | The changes in deferred tax valuation allowances were as follows:
|  |  | Additions |  |  |  |
| Balance at Beginning of Period |  | Charged to Income |  | Charged to Other Accounts |  | Deductions |  | Balance at End of Period
2018 | $ | 838 |  |  | $ | 26 |  |  | $ | — |  |  | $ | 56 |  | (a) | $ | 808 |
2017 | 593 |  |  | 256 |  | (b) | — |  |  | 11 |  |  | 838 |
2016 | 662 |  |  | 17 |  |  | 2 |  |  | 88 |  | (c) | 593 |
(a) | Decrease in the valuation allowance of approximately $35 million due to the change in the total foreign tax credits available after finalization of the deemed dividend calculation required by the TCJA in 2017. In addition, the deferred tax assets and corresponding valuation allowances were reduced in 2018 by approximately $19 million due to the effect of foreign currency exchange rates.
(b) | Increase in valuation allowance of approximately $145 million related to expected future utilization of both 2017 foreign tax credits and pre-2017 foreign tax credits carried forward. For additional information, see the "Reconciliation of Income Tax Expense" and associated notes below.
In addition, the reduction of the U.S. federal corporate income tax rate enacted by the TCJA in 2017 resulted in a $62 million increase in federal deferred tax assets and a corresponding valuation allowance related to the federal tax benefits of state net operating losses.
(c) | The reduction of the U.K. statutory income tax rate in 2016 resulted in a $19 million reduction in deferred tax assets and corresponding valuation allowances. See "Reconciliation of Income Tax Expense" below for additional information on the impact of the U.K. Finance Act 2016. In addition, deferred tax assets and corresponding valuation allowances were reduced in 2016 by approximately $65 million due to the effect of foreign currency exchange rates.
Components of Income Tax Expense (Benefit) | Details of the components of income tax expense, a reconciliation of federal income taxes derived from statutory tax rates applied to "Income Before Income Taxes" to income taxes for reporting purposes, and details of "Taxes, other than income" were as follows:
| 2018 |  | 2017 |  | 2016
Income Tax Expense (Benefit) |  |  |  |  |
Current - Federal | $ | (19 | ) |  | $ | 6 |  |  | $ | (14 | )
Current - State | 17 |  |  | 25 |  |  | 21 |
Current - Foreign | 104 |  |  | 45 |  |  | 80 |
Total Current Expense | 102 |  |  | 76 |  |  | 87 |
Deferred - Federal (a) | 203 |  |  | 532 |  |  | 385 |
Deferred - State | 100 |  |  | 88 |  |  | 89 |
Deferred - Foreign | 107 |  |  | 133 |  |  | 86 |
Total Deferred Expense, excluding operating loss carryforwards | 410 |  |  | 753 |  |  | 560 |
Amortization of investment tax credit | (3 | ) |  | (3 | ) |  | (3 | )
Tax expense (benefit) of operating loss carryforwards |  |  |  |  |
Deferred - Federal | (20 | ) |  | (16 | ) |  | 25 |
Deferred - State | (31 | ) |  | (26 | ) |  | (21 | )
Total Tax Expense (Benefit) of Operating Loss Carryforwards | (51 | ) |  | (42 | ) |  | 4 |
Total income taxes | $ | 458 |  |  | $ | 784 |  |  | $ | 648 |
Total income tax expense - Federal | $ | 161 |  |  | $ | 519 |  |  | $ | 393 |
Total income tax expense - State | 86 |  |  | 87 |  |  | 89 |
Total income tax expense - Foreign | 211 |  |  | 178 |  |  | 166 |
Total income taxes | $ | 458 |  |  | $ | 784 |  |  | $ | 648 |
(a) | Due to the enactment of the TCJA, PPL recorded the following in 2017:
• | $220 million of deferred income tax expense related to the impact of the U.S. federal corporate income tax rate reduction from 35% to 21% on deferred tax assets and liabilities;
• | $162 million of deferred tax expense related to the utilization of current year losses resulting from the taxable deemed dividend; partially offset by,
• | $60 million of deferred tax benefits related to the $205 million of 2017 foreign tax credits partially offset by $145 million of valuation allowances.
In the table above, the following income tax expense (benefit) are excluded from income taxes.
| 2018 |  | 2017 |  | 2016
Stock-based compensation recorded to Earnings reinvested | $ | — |  |  | $ | — |  |  | $ | (7 | )
Other comprehensive income | (6 | ) |  | (34 | ) |  | (6 | )
Valuation allowance on state deferred taxes recorded to other comprehensive income | — |  |  | (1 | ) |  | 1 |
Total | $ | (6 | ) |  | $ | (35 | ) |  | $ | (12 | )
Reconciliation of Income Tax Expense Derived From Statutory Tax Rate | Details of the components of income tax expense, a reconciliation of federal income taxes derived from statutory tax rates applied to "Income Before Income Taxes" to income taxes for reporting purposes, and details of "Taxes, other than income" were as follows:
| 2018 |  | 2017 |  | 2016
Reconciliation of Income Tax Expense |  |  |  |  |  |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate (a) | $ | 480 |  |  | $ | 669 |  |  | $ | 893 |
Increase (decrease) due to: |  |  |  |  |  |  |  |
State income taxes, net of federal income tax benefit (a) | 40 |  |  | 46 |  |  | 46 |
Valuation allowance adjustments (b) | 21 |  |  | 36 |  |  | 16 |
Impact of lower U.K. income tax rates(c) | (25 | ) |  | (176 | ) |  | (177 | )
U.S. income tax on foreign earnings - net of foreign tax credit (a)(d) | 3 |  |  | 47 |  |  | (42 | )
Foreign income return adjustments | — |  |  | (8 | ) |  | 2 |
Impact of the U.K. Finance Act on deferred tax balances (e) | (13 | ) |  | (16 | ) |  | (49 | )
Depreciation and other items not normalized | (11 | ) |  | (10 | ) |  | (10 | )
Amortization of excess deferred federal and state income taxes(f) | (37 | ) |  | — |  |  | — |
Interest benefit on U.K. financing entities | (17 | ) |  | (16 | ) |  | (17 | )
Stock-based compensation | 4 |  |  | (3 | ) |  | (10 | )
Deferred tax impact of U.S. tax reform (g) | — |  |  | 220 |  |  | — |
Deferred tax impact of Kentucky tax reform (h) | 9 |  |  | — |  |  | — |
Other (i) | 4 |  |  | (5 | ) |  | (4 | )
Total increase (decrease) | (22 | ) |  | 115 |  |  | (245 | )
Total income taxes | $ | 458 |  |  | $ | 784 |  |  | $ | 648 |
Effective income tax rate | 20.0 | % |  | 41.0 | % |  | 25.4 | %
(a) | The U.S. federal corporate tax rate was reduced from 35% to 21%, as enacted by the TCJA, effective January 1, 2018.
(b) | During 2017, PPL recorded an increase in valuation allowances of $23 million primarily related to foreign tax credits recorded in 2016. The future utilization of these credits is expected to be lower as a result of the TCJA.
During 2018, 2017 and 2016, PPL recorded deferred income tax expense of $24 million, $16 million and $13 million for valuation allowances primarily related to increased Pennsylvania net operating loss carryforwards expected to be unutilized.
(c) | The reduction in the U.S. federal corporate income tax rate from 35% to 21% significantly reduced the difference between the U.K. and U.S. income tax rates in 2018 compared with 2017.
(d) | During 2017, PPL recorded a federal income tax benefit of $35 million primarily attributable to U.K. pension contributions.
During 2017, PPL recorded deferred income tax expense of $83 million primarily related to enactment of the TCJA. The enacted tax law included a conversion from a worldwide tax system to a territorial tax system, effective January 1, 2018. In the transition to the territorial regime, a one-time transition tax was imposed on PPL’s unrepatriated accumulated foreign earnings in 2017. These earnings were treated as a taxable deemed dividend to PPL of approximately $462 million, including $205 million of foreign tax credits. As the PPL consolidated U.S. group had a taxable loss for 2017, inclusive of the taxable deemed dividend, these credits were recorded as a deferred tax asset. However, it is expected that under the TCJA, only $83 million of the $205 million of foreign tax credits will be realized in the carry forward period. Accordingly, a valuation allowance on the current year foreign tax credits in the amount of $122 million has been recorded to reflect the reduction in the future utilization of the credits. The foreign tax credits associated with the deemed repatriation result in a gross carryforward and corresponding deferred tax asset of $205 million offset by a valuation allowance of $122 million. During 2016, PPL recorded lower income taxes primarily attributable to foreign tax credit carryforwards, arising from a decision to amend prior year tax returns to claim foreign tax credits rather than deduct foreign taxes. This decision was prompted by changes to the company's most recent business plan.
(e) | The U.K. Finance Act 2016, enacted in September 2016, reduced the U.K. statutory income tax rate effective April 1, 2020 to 17%. As a result, PPL reduced its net deferred tax liabilities and recognized a $42 million deferred income tax benefit during 2016.
(f) | During 2018, PPL recorded lower income tax expense for the amortization of excess deferred income taxes that primarily resulted from the U.S. federal corporate income tax rate reduction from 35% to 21% enacted by the TCJA.
(g) | During 2017, PPL recorded deferred income tax expense related to the U.S. federal corporate income tax rate reduction from 35% to 21% enacted by the TCJA.
(h) | During 2018, PPL recorded deferred income tax expense, primarily associated with LKE’s non-regulated entities, due to the Kentucky corporate income tax rate reduction from 6% to 5%, as enacted by HB 487, effective January, 1, 2018.
(i) | During 2018, PPL filed its consolidated federal income tax return, which included updates to the TCJA provisional amounts recorded in 2017. The adjustments to the various provisional amounts that are considered complete as of the filed tax return resulted in an immaterial impact to income tax expense and are discussed in the TCJA section abo
Details of Taxes Other Than Income | Details of the components of income tax expense, a reconciliation of federal income taxes derived from statutory tax rates applied to "Income Before Income Taxes" to income taxes for reporting purposes, and details of "Taxes, other than income" were as follows:
| 2018 |  | 2017 |  | 2016
Taxes, other than income |  |  |  |  |
State gross receipts | $ | 103 |  |  | $ | 102 |  |  | $ | 100 |
State capital stock | — |  |  | (6 | ) |  | — |
Foreign property | 134 |  |  | 127 |  |  | 135 |
Domestic Other | 75 |  |  | 69 |  |  | 66 |
Total | $ | 312 |  |  | $ | 292 |  |  | $ | 301 |
Summary of Income Tax Examinations | With few exceptions, at December 31, 2018, these jurisdictions, as well as the tax years that are no longer subject to examination, were as follows.
| PPL |  | PPL Electric |  | LKE |  | LG&E |  | KU
U.S. (federal) | 2013 and prior |  | 2013 and prior |  | 2013 and prior |  | 2013 and prior |  | 2013 and prior
Pennsylvania (state) | 2011 and prior |  | 2011 and prior |  |  |  |  |  |
Kentucky (state) | 2013 and prior |  |  |  | 2013 and prior |  | 2013 and prior |  | 2013 and prior
U.K. (foreign) | 2015 and prior |  |  |  |  |  |  |  |
PPL Electric Utilities Corp [Member] |
Income Taxes [Line Items] |
Components of Deferred Tax Assets and Liabilities | Significant components of PPL Electric's deferred income tax assets and liabilities were as follows:
| 2018 |  | 2017
Deferred Tax Assets |  |  |
Accrued pension and postretirement costs | $ | 110 |  |  | $ | 81 |
Contributions in aid of construction | 118 |  |  | 117 |
Regulatory liabilities | 35 |  |  | 25 |
Income taxes due to customers | 181 |  |  | 193 |
State loss carryforwards | 14 |  |  | 19 |
Federal loss carryforwards | 79 |  |  | 91 |
Other | 25 |  |  | 27 |
Total deferred tax assets | 562 |  |  | 553 |
Deferred Tax Liabilities |  |  |
Electric utility plant - net | 1,681 |  |  | 1,544 |
Reacquired debt costs | 6 |  |  | 8 |
Regulatory assets | 176 |  |  | 150 |
Other | 19 |  |  | 5 |
Total deferred tax liabilities | 1,882 |  |  | 1,707 |
Net deferred tax liability | $ | 1,320 |  |  | $ | 1,154 |
Summary of Operating Loss Carryforwards and Tax Credit Carryforwards | At December 31, 2018, PPL Electric had the following loss carryforwards and related deferred tax assets:
| Gross |  | Deferred Tax Asset |  | Expiration
Loss carryforwards |  |  |  |  |
Federal net operating losses | $ | 370 |  |  | $ | 78 |  |  | 2031-2037
Federal charitable contributions | 6 |  |  | 1 |  |  | 2020-2022
State net operating losses | 180 |  |  | 14 |  |  | 2031-2032
State charitable contributions | 5 |  |  | — |  |  | 2020-2022
Components of Income Tax Expense (Benefit) | Details of the components of income tax expense, a reconciliation of federal income taxes derived from statutory tax rates applied to "Income Before Income Taxes" to income taxes for reporting purposes, and details of "Taxes, other than income" were as follows.
| 2018 |  | 2017 |  | 2016
Income Tax Expense (Benefit) |  |  |  |  |
Current - Federal | $ | 2 |  |  | $ | (65 | ) |  | $ | (29 | )
Current - State | 9 |  |  | 20 |  |  | 19 |
Total Current Expense (Benefit) | 11 |  |  | (45 | ) |  | (10 | )
Deferred - Federal (a) | 96 |  |  | 234 |  |  | 193 |
Deferred - State | 37 |  |  | 29 |  |  | 29 |
Total Deferred Expense, excluding operating loss carryforwards | 133 |  |  | 263 |  |  | 222 |
Tax expense (benefit) of operating loss carryforwards |  |  |  |  |
Deferred - Federal | (8 | ) |  | (5 | ) |  | — |
Total Tax Expense (Benefit) of Operating Loss Carryforwards | (8 | ) |  | (5 | ) |  | — |
Total income taxes | $ | 136 |  |  | $ | 213 |  |  | $ | 212 |
Total income tax expense - Federal | $ | 90 |  |  | $ | 164 |  |  | $ | 164 |
Total income tax expense - State | 46 |  |  | 49 |  |  | 48 |
Total income taxes | $ | 136 |  |  | $ | 213 |  |  | $ | 212 |
(a) | Due to the enactment of the TCJA in 2017, PPL Electric recorded a $13 million deferred tax benefit related to the impact of the U.S. federal corporate income tax rate reduction from 35% to 21% on deferred tax assets and liabilities.
Reconciliation of Income Tax Expense Derived From Statutory Tax Rate | Details of the components of income tax expense, a reconciliation of federal income taxes derived from statutory tax rates applied to "Income Before Income Taxes" to income taxes for reporting purposes, and details of "Taxes, other than income" were as follows.
| 2018 |  | 2017 |  | 2016
Reconciliation of Income Taxes |  |  |  |  |  |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate (a) | $ | 119 |  |  | $ | 201 |  |  | $ | 193 |
Increase (decrease) due to: |  |  |  |  |  |  |  |
State income taxes, net of federal income tax benefit (a) | 43 |  |  | 36 |  |  | 36 |
Depreciation and other items not normalized | (11 | ) |  | (8 | ) |  | (8 | )
Amortization of excess deferred federal income taxes (a) | (17 | ) |  | — |  |  | — |
Stock-based compensation | 1 |  |  | (2 | ) |  | (6 | )
Deferred tax impact of U.S. tax reform (b) | — |  |  | (13 | ) |  | — |
Other | 1 |  |  | (1 | ) |  | (3 | )
Total increase (decrease) | 17 |  |  | 12 |  |  | 19 |
Total income tax expense | $ | 136 |  |  | $ | 213 |  |  | $ | 212 |
Effective income tax rate | 24.0 | % |  | 37.0 | % |  | 38.4 | %
(a) | The U.S. federal corporate tax rate was reduced from 35% to 21%, as enacted by the TCJA, effective January 1, 2018.
(b) | During 2017, PPL Electric recorded a deferred tax benefit related to the U.S. federal corporate income tax rate reduction from 35% to 21% enacted by the TCJA.
Details of Taxes Other Than Income | Details of the components of income tax expense, a reconciliation of federal income taxes derived from statutory tax rates applied to "Income Before Income Taxes" to income taxes for reporting purposes, and details of "Taxes, other than income" were as follows.
| 2018 |  | 2017 |  | 2016
Taxes, other than income |  |  |  |  |  |  |  |
State gross receipts | $ | 103 |  |  | $ | 102 |  |  | $ | 100 |
Property and other | 6 |  |  | 5 |  |  | 5 |
Total | $ | 109 |  |  | $ | 107 |  |  | $ | 105 |
LG And E And KU Energy LLC [Member] |
Income Taxes [Line Items] |
Components of Deferred Tax Assets and Liabilities | Significant components of LKE's deferred income tax assets and liabilities were as follows:
| 2018 |  | 2017
Deferred Tax Assets |  |  |
Federal loss carryforwards | $ | 142 |  |  | $ | 150 |
State loss carryforwards | 33 |  |  | 41 |
Federal tax credit carryforwards | 169 |  |  | 181 |
Contributions in aid of construction | 21 |  |  | 17 |
Regulatory liabilities | 52 |  |  | 43 |
Accrued pension and postretirement costs | 92 |  |  | 100 |
Income taxes due to customers | 299 |  |  | 305 |
Deferred investment tax credits | 32 |  |  | 33 |
Valuation allowances | (8 | ) |  | (8 | )
Other | 29 |  |  | 33 |
Total deferred tax assets | 861 |  |  | 895 |
Deferred Tax Liabilities |  |  |
Plant - net | 1,671 |  |  | 1,615 |
Regulatory assets | 138 |  |  | 138 |
Other | 8 |  |  | 8 |
Total deferred tax liabilities | 1,817 |  |  | 1,761 |
Net deferred tax liability | $ | 956 |  |  | $ | 866 |
Summary of Operating Loss Carryforwards and Tax Credit Carryforwards | At December 31, 2018, LKE had the following loss and tax credit carryforwards, related deferred tax assets, and valuation allowances recorded against the deferred tax assets.
| Gross |  | Deferred Tax Asset |  | Valuation Allowance |  | Expiration
Loss carryforwards |  |  |  |  |  |  |
Federal net operating losses | $ | 674 |  |  | $ | 142 |  |  | $ | — |  |  | 2031 - 2037
Federal charitable contributions | 11 |  |  | 2 |  |  | — |  |  | 2020 - 2022
State net operating losses | 848 |  |  | 33 |  |  | — |  |  | 2029 - 2038
Credit carryforwards |  |  |  |  |  |  |
Federal investment tax credit |  |  | 133 |  |  | — |  |  | 2025 - 2028, 2036
Federal alternative minimum tax credit (a) |  |  | 14 |  |  | — |  |  | Indefinite
Federal - other |  |  | 22 |  |  | (8 | ) |  | 2019-2038
State - other |  |  | 1 |  |  | — |  |  | Indefinite
(a) | The TCJA repealed the corporate alternative minimum tax (AMT) for tax years beginning after December 31, 2017. The existing indefinite carryforward period for AMT credits was retained.
Schedule of Valuation and Qualifying Accounts of Deferred Tax Assets | Changes in deferred tax valuation allowances were:
| Balance at Beginning of Period |  | Additions |  | Deductions |  | Balance at End of Period
2018 | $ | 8 |  |  | $ | — |  |  | $ | — |  |  | $ | 8 |
2017 | 11 |  |  | 4 |  | (a) | 7 |  | (b) | 8 |
2016 | 12 |  |  | — |  |  | 1 |  | (b) | 11 |
(a) | Federal tax credits expiring in 2021 that are more likely than not to expire before being utilized.
(b) | Federal tax credit expiring
Components of Income Tax Expense (Benefit) | Details of the components of income tax expense, a reconciliation of federal income taxes derived from statutory tax rates applied to "Income Before Income Taxes" to income taxes for reporting purposes, and details of "Taxes, other than income" were:
| 2018 |  | 2017 |  | 2016
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |
Current - Federal | $ | 31 |  |  | $ | 74 |  |  | $ | (36 | )
Current - State | 4 |  |  | 6 |  |  | 1 |
Total Current Expense (Benefit) | 35 |  |  | 80 |  |  | (35 | )
Deferred - Federal (a) | 65 |  |  | 268 |  |  | 248 |
Deferred - State | 34 |  |  | 32 |  |  | 38 |
Total Deferred Expense, excluding benefits of operating loss carryforwards | 99 |  |  | 300 |  |  | 286 |
Amortization of investment tax credit - Federal | (3 | ) |  | (3 | ) |  | (3 | )
Tax benefit of operating loss carryforwards |  |  |  |  |  |  |  |
Deferred - Federal | (2 | ) |  | (2 | ) |  | 10 |
Deferred - State | — |  |  | — |  |  | (1 | )
Total Tax Expense (Benefit) of Operating Loss Carryforwards | (2 | ) |  | (2 | ) |  | 9 |
Total income taxes (b) | $ | 129 |  |  | $ | 375 |  |  | $ | 257 |
Total income tax expense - Federal | $ | 91 |  |  | $ | 337 |  |  | $ | 219 |
Total income tax expense - State | 38 |  |  | 38 |  |  | 38 |
Total income taxes (b) | $ | 129 |  |  | $ | 375 |  |  | $ | 257 |
(a) | Due to the enactment of the TCJA in 2017, LKE recorded $112 million of deferred income tax expense, of which $108 million related to the impact of the U.S. federal corporate income tax rate reduction from 35% to 21% on deferred tax assets and liabilities and $4 million related to valuation allowances on tax credits expiring in 2021.
(b) | Excludes deferred federal and state tax expense (benefit) recorded to OCI of $5 million in 2018, $(10) million in 2017 and $(16) million in 2016.
Reconciliation of Income Tax Expense Derived From Statutory Tax Rate | Details of the components of income tax expense, a reconciliation of federal income taxes derived from statutory tax rates applied to "Income Before Income Taxes" to income taxes for reporting purposes, and details of "Taxes, other than income" were:
| 2018 |  | 2017 |  | 2016
Reconciliation of Income Tax Expense |  |  |  |  |  |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate (a) | $ | 121 |  |  | $ | 242 |  |  | $ | 240 |
Increase (decrease) due to: |  |  |  |  |  |  |  |
State income taxes, net of federal income tax benefit | 22 |  |  | 26 |  |  | 26 |
Amortization of investment tax credit | (3 | ) |  | (3 | ) |  | (3 | )
Amortization of excess deferred federal and state income taxes (b) | (20 | ) |  | (2 | ) |  | (1 | )
Stock-based compensation | 1 |  |  | 1 |  |  | (3 | )
Deferred tax impact of U.S. tax reform (c) | — |  |  | 112 |  |  | — |
Deferred tax impact of state tax reform (d) | 9 |  |  | — |  |  | — |
Other (e) | (1 | ) |  | (1 | ) |  | (2 | )
Total increase | 8 |  |  | 133 |  |  | 17 |
Total income tax expense | $ | 129 |  |  | $ | 375 |  |  | $ | 257 |
Effective income tax rate | 22.5 | % |  | 54.3 | % |  | 37.5 | %
(a) | The U.S. federal corporate tax rate was reduced from 35% to 21%, as enacted by the TCJA, effective January 1, 2018.
(b) | During 2018, LKE recorded lower income tax expense for the amortization of excess deferred income taxes that primarily resulted from the U.S. federal corporate income tax rate reduction from 35% to 21% enacted by the TCJA.
(c) | During 2017, LKE recorded deferred income tax expense primarily due to the U.S. federal corporate income tax rate reduction from 35% to 21% enacted by the TCJA.
(d) | During 2018, LKE recorded deferred income tax expense, primarily associated with LKE's non-regulated entities, due to the Kentucky corporate income tax rate reduction from 6% to 5%, as enacted by HB 487, effective January 1, 2018.
(e) | During 2018, PPL filed its consolidated federal income tax return, which included updates to the TCJA provisional amounts recorded in 2017. The adjustments to the various provisional amounts that are considered complete as of the filed tax return resulted in an immaterial impact to income tax expense and are discussed in the TCJA section above.
Details of Taxes Other Than Income | Details of the components of income tax expense, a reconciliation of federal income taxes derived from statutory tax rates applied to "Income Before Income Taxes" to income taxes for reporting purposes, and details of "Taxes, other than income" were:
| 2018 |  | 2017 |  | 2016
Taxes, other than income |  |  |  |  |  |  |  |
Property and other | $ | 70 |  |  | $ | 65 |  |  | $ | 62 |
Total | $ | 70 |  |  | $ | 65 |  |  | $ | 62 |
Louisville Gas And Electric Co [Member] |
Income Taxes [Line Items] |
Components of Deferred Tax Assets and Liabilities | Significant components of LG&E's deferred income tax assets and liabilities were as follows:
| 2018 |  | 2017
Deferred Tax Assets |  |  |
Federal loss carryforwards | $ | — |  |  | $ | 29 |
Contributions in aid of construction | 14 |  |  | 11 |
Regulatory liabilities | 24 |  |  | 21 |
Accrued pension and postretirement costs | 16 |  |  | 14 |
Deferred investment tax credits | 9 |  |  | 9 |
Income taxes due to customers | 139 |  |  | 142 |
Other | 15 |  |  | 19 |
Total deferred tax assets | 217 |  |  | 245 |
Deferred Tax Liabilities |  |  |
Plant - net | 751 |  |  | 724 |
Regulatory assets | 88 |  |  | 88 |
Other | 6 |  |  | 5 |
Total deferred tax liabilities | 845 |  |  | 817 |
Net deferred tax liability | $ | 628 |  |  | $ | 572 |
Components of Income Tax Expense (Benefit) | Details of the components of income tax expense, a reconciliation of federal income taxes derived from statutory tax rates applied to "Income Before Income Taxes" to income taxes for reporting purposes, and details of "Taxes, other than income" were:
| 2018 |  | 2017 |  | 2016
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |
Current - Federal | $ | — |  |  | $ | — |  |  | $ | (22 | )
Current - State | 4 |  |  | 5 |  |  | 1 |
Total current Expense (Benefit) | 4 |  |  | 5 |  |  | (21 | )
Deferred - Federal | 51 |  |  | 112 |  |  | 134 |
Deferred - State | 10 |  |  | 14 |  |  | 18 |
Total Deferred Expense, excluding benefits of operating loss carryforwards | 61 |  |  | 126 |  |  | 152 |
Amortization of investment tax credit - Federal | (1 | ) |  | (1 | ) |  | (1 | )
Tax benefit of operating loss carryforwards |  |  |  |  |  |  |
Deferred - Federal | — |  |  | 1 |  |  | (4 | )
Total Tax Benefit of Operating Loss Carryforwards | — |  |  | 1 |  |  | (4 | )
Total income taxes | $ | 64 |  |  | $ | 131 |  |  | $ | 126 |
Total income tax expense - Federal | $ | 50 |  |  | $ | 112 |  |  | $ | 107 |
Total income tax expense - State | 14 |  |  | 19 |  |  | 19 |
Total income taxes | $ | 64 |  |  | $ | 131 |  |  | $ | 126 |
Reconciliation of Income Tax Expense Derived From Statutory Tax Rate | Details of the components of income tax expense, a reconciliation of federal income taxes derived from statutory tax rates applied to "Income Before Income Taxes" to income taxes for reporting purposes, and details of "Taxes, other than income" were:
| 2018 |  | 2017 |  | 2016
Reconciliation of Income Tax Expense |  |  |  |  |  |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate (a) | $ | 62 |  |  | $ | 120 |  |  | $ | 115 |
Increase (decrease) due to: |  |  |  |  |  |  |  |
State income taxes, net of federal income tax benefit | 11 |  |  | 14 |  |  | 12 |
Amortization of investment tax credit | (1 | ) |  | (1 | ) |  | (1 | )
Amortization of excess deferred federal and state income taxes (b) | (8 | ) |  | (1 | ) |  | — |
Other | — |  |  | (1 | ) |  | — |
Total increase | 2 |  |  | 11 |  |  | 11 |
Total income tax expense | $ | 64 |  |  | $ | 131 |  |  | $ | 126 |
Effective income tax rate | 21.5 | % |  | 38.1 | % |  | 38.3 | %
(a) | The U.S. federal corporate tax rate was reduced from 35% to 21%, as enacted by the TCJA, effective January 1, 2018.
(b) | During 2018, LG&E recorded lower income tax expense for the amortization of excess deferred income taxes that primarily resulted from the U.S. federal corporate income tax rate reduction from 35% to 21% enacted by the TCJA.
Details of Taxes Other Than Income | Details of the components of income tax expense, a reconciliation of federal income taxes derived from statutory tax rates applied to "Income Before Income Taxes" to income taxes for reporting purposes, and details of "Taxes, other than income" were:
| 2018 |  | 2017 |  | 2016
Taxes, other than income |  |  |  |  |  |  |  |
Property and other | $ | 36 |  |  | $ | 33 |  |  | $ | 32 |
Total | $ | 36 |  |  | $ | 33 |  |  | $ | 32 |
Kentucky Utilities Co [Member] |
Income Taxes [Line Items] |
Components of Deferred Tax Assets and Liabilities | Significant components of KU's deferred income tax assets and liabilities were as follows:
| 2018 |  | 2017
Deferred Tax Assets |  |  |
Federal loss carryforwards | $ | — |  |  | $ | 13 |
Contributions in aid of construction | 7 |  |  | 6 |
Regulatory liabilities | 28 |  |  | 22 |
Accrued pension and postretirement costs | 7 |  |  | 7 |
Deferred investment tax credits | 23 |  |  | 24 |
Income taxes due to customers | 160 |  |  | 163 |
Other | 3 |  |  | 8 |
Total deferred tax assets | 228 |  |  | 243 |
Deferred Tax Liabilities |  |  |
Plant - net | 911 |  |  | 882 |
Regulatory assets | 50 |  |  | 50 |
Other | 2 |  |  | 2 |
Total deferred tax liabilities | 963 |  |  | 934 |
Net deferred tax liability | $ | 735 |  |  | $ | 691 |
Components of Income Tax Expense (Benefit) | Details of the components of income tax expense, a reconciliation of federal income taxes derived from statutory tax rates applied to "Income Before Income Taxes" to income taxes for reporting purposes, and details of "Taxes, other than income" were:
| 2018 |  | 2017 |  | 2016
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |
Current - Federal | $ | 22 |  |  | $ | — |  |  | $ | 31 |
Current - State | 6 |  |  | 7 |  |  | 5 |
Total Current Expense (Benefit) | 28 |  |  | 7 |  |  | 36 |
Deferred - Federal | 40 |  |  | 138 |  |  | 131 |
Deferred - State | 10 |  |  | 16 |  |  | 19 |
Total Deferred Expense, excluding benefits of operating loss carryforwards | 50 |  |  | 154 |  |  | 150 |
Amortization of investment tax credit - Federal | (2 | ) |  | (2 | ) |  | (2 | )
Tax benefit of operating loss carryforwards |  |  |  |  |  |  |  |
Deferred - Federal | — |  |  | — |  |  | (21 | )
Total Tax Benefit of Operating Loss Carryforwards | — |  |  | — |  |  | (21 | )
Total income taxes | $ | 76 |  |  | $ | 159 |  |  | $ | 163 |
Total income tax expense - Federal | $ | 60 |  |  | $ | 136 |  |  | $ | 139 |
Total income tax expense - State | 16 |  |  | 23 |  |  | 24 |
Total income taxes | $ | 76 |  |  | $ | 159 |  |  | $ | 163 |
Reconciliation of Income Tax Expense Derived From Statutory Tax Rate | Details of the components of income tax expense, a reconciliation of federal income taxes derived from statutory tax rates applied to "Income Before Income Taxes" to income taxes for reporting purposes, and details of "Taxes, other than income" were:
| 2018 |  | 2017 |  | 2016
Reconciliation of Income Tax Expense |  |  |  |  |  |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate (a) | $ | 76 |  |  | $ | 146 |  |  | $ | 150 |
Increase (decrease) due to: |  |  |  |  |  |  |  |
State income taxes, net of federal income tax benefit | 13 |  |  | 15 |  |  | 16 |
Amortization of investment tax credit | (2 | ) |  | (2 | ) |  | (2 | )
Amortization of excess deferred federal and state income taxes (b) | (12 | ) |  | (1 | ) |  | (1 | )
Other | 1 |  |  | 1 |  |  | — |
Total increase (decrease) | — |  |  | 13 |  |  | 13 |
Total income tax expense | $ | 76 |  |  | $ | 159 |  |  | $ | 163 |
Effective income tax rate | 21.0 | % |  | 38.0 | % |  | 38.1 | %
(a) | The U.S. federal corporate tax rate was reduced from 35% to 21%, as enacted by the TCJA, effective January 1, 2018.
(b) | During 2018, KU recorded lower income tax expense for the amortization of excess deferred income taxes that primarily resulted from the U.S. federal corporate income tax rate reduction from 35% to 21% enacted by the TCJA.
Details of Taxes Other Than Income | Details of the components of income tax expense, a reconciliation of federal income taxes derived from statutory tax rates applied to "Income Before Income Taxes" to income taxes for reporting purposes, and details of "Taxes, other than income" were:
| 2018 |  | 2017 |  | 2016
Taxes, other than income |  |  |  |  |  |  |  |
Property and other | $ | 34 |  |  | $ | 32 |  |  | $ | 30 |
Total | $ | 34 |  |  | $ | 32 |  |  | $ | 30 |

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