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Income and Other Taxes (Income Tax Expense and Reconciliation of Income Tax Expense) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax Expense (Benefit) |  |  |
Current - Federal | $ (10) | $ (19) | $ 6
Current - State | 19 | 17 | 25
Current - Foreign | 91 | 104 | 45
Total Current Expense | 100 | 102 | 76
Deferred - Federal | 139 | 203 | 532
Deferred - State | 76 | 100 | 88
Deferred - Foreign | 123 | 107 | 133
Total Deferred Expense (Benefit), excluding operating loss carry forwards | 338 | 410 | 753
Amortization of investment tax credit | (3) | (3) | (3)
Tax expense (benefit) of operating loss carryforwards [Abstract] |  |  |
Deferred - Federal | 7 | (20) | (16)
Deferred - State | (33) | (31) | (26)
Total Tax Expense (Benefit) of Operating Loss Carryforwards | (26) | (51) | (42)
Total income tax from continuing operations | 409 | 458 | 784
Income tax expense [Abstract] |  |  |
Total income tax expense - Federal | 133 | 161 | 519
Total income tax expense - State | 62 | 86 | 87
Total income tax expense - Foreign | 214 | 211 | 178
Total income tax from continuing operations | 409 | 458 | 784
Income Tax Expense (Benefit) Excluded From Income Taxes [Abstract] |  |  |
Other comprehensive income | (93) | (6) | (34)
Valuation allowance on state deferred taxes recorded to other comprehensive income | 0 | 0 | (1)
Total income tax expense (benefits) excluded from incomes taxes from continuing operations | (93) | (6) | (35)
Reconciliation of Income Tax Expense |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | 453 | 480 | 669
Increase (decrease) due to: |  |  |
State income taxes, net of federal income tax benefit | 45 | 40 | 46
Valuation allowance adjustments | 22 | 21 | 36
Impact of lower U.K. income tax rates | (25) | (25) | (176)
U.S. income tax on foreign earnings - net of foreign tax credit | 2 | 3 | 47
Foreign income return adjustments | 0 | 0 | (8)
Impact of the United Kingdom Finance Acts on deferred tax balances | (14) | (13) | (16)
Depreciation and other items not normalized | (10) | (11) | (10)
Amortization of excess deferred federal and state income taxes | (40) | (37) | 0
Interest benefit on United Kingdom financing entities | (12) | (17) | (16)
Deferred tax impact of U.S. tax reform | 0 | 0 | 220
Deferred tax impact of Kentucky tax reform | 0 | 9 | 0
Kentucky recycling credit, net of federal income tax expense | (18) | 0 | 0
Other | 6 | 8 | (8)
Total increase (decrease) | (44) | (22) | 115
Total income tax from continuing operations | $ 409 | $ 458 | $ 784
Effective income tax rate | 19.00% | 20.00% | 41.00%
Income Tax Reconciliation Valuation Allowance Foreign Tax Credits |  |  | $ 23
Expense related to increased Pennsylvania net operating loss carryforwards expected to be unutilized | $ 25 | $ 24 | 16
Deferred Income Tax Expense Benefit Foreign Pension Contribution |  |  | 35
Taxes, other than income |  |  |
State gross receipts | 107 | 103 | 102
State capital stock | 0 | 0 | (6)
Foreign property | 127 | 134 | 127
Domestic property and other | 79 | 75 | 69
Total | 313 | 312 | 292
Income Tax Reconciliation Valuation Allowance Foreign Tax Credits |  |  | 23
Tax Cuts And Jobs Act [Member] |  |  |
Income Tax Expense (Benefit) |  |  |
Deferred Income Tax Expense (Benefit) Tax Rate Change |  |  | 220
Tax expense (benefit) of operating loss carryforwards [Abstract] |  |  |
Total income tax from continuing operations |  |  | 321
Income tax expense [Abstract] |  |  |
Total income tax from continuing operations |  |  | 321
Increase (decrease) due to: |  |  |
Total income tax from continuing operations |  |  | 321
Deferred Income Tax Expense Benefit Tax Reform |  |  | 83
Taxable Deemed Dividend |  |  | 462
Taxes, other than income |  |  |
Deferred Income Tax Expense (Benefit) Net Operating Loss |  |  | 162
Deferred Income Tax Benefit Foreign Tax Credits |  |  | 60
Deferred Tax Assets, Foreign Tax Credit Carryforwards |  |  | 205
Valuation Rollfoward Specific Transaction Additions Foreign Tax Credits |  |  | 145
Credit Carryforward Valuation Allowance Foreign Tax Credits |  |  | 122
Credit Carryforward Expected Realization Foreign Tax Credits |  |  | 83
PPL Electric Utilities Corp [Member] |  |  |
Income Tax Expense (Benefit) |  |  |
Current - Federal | 44 | 2 | (65)
Current - State | 15 | 9 | 20
Total Current Expense | 59 | 11 | (45)
Deferred - Federal | 51 | 96 | 234
Deferred - State | 39 | 37 | 29
Total Deferred Expense (Benefit), excluding operating loss carry forwards | 90 | 133 | 263
Tax expense (benefit) of operating loss carryforwards [Abstract] |  |  |
Deferred - Federal | 0 | (8) | (5)
Total Tax Expense (Benefit) of Operating Loss Carryforwards | 0 | (8) | (5)
Total income tax from continuing operations | 149 | 136 | 213
Income tax expense [Abstract] |  |  |
Total income tax expense - Federal | 95 | 90 | 164
Total income tax expense - State | 54 | 46 | 49
Total income tax from continuing operations | 149 | 136 | 213
Reconciliation of Income Tax Expense |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | 127 | 119 | 201
Increase (decrease) due to: |  |  |
State income taxes, net of federal income tax benefit | 47 | 43 | 36
Depreciation and other items not normalized | (10) | (11) | (8)
Amortization of excess deferred federal and state income taxes | (18) | (17) | 0
Deferred tax impact of U.S. tax reform | 0 | 0 | (13)
Other | 3 | 2 | (3)
Total increase (decrease) | 22 | 17 | 12
Total income tax from continuing operations | $ 149 | $ 136 | $ 213
Effective income tax rate | 24.60% | 24.00% | 37.00%
Taxes, other than income |  |  |
State gross receipts | $ 107 | $ 103 | $ 102
Domestic property and other | 5 | 6 | 5
Total | 112 | 109 | 107
PPL Electric Utilities Corp [Member] | Tax Cuts And Jobs Act [Member] |  |  |
Income Tax Expense (Benefit) |  |  |
Deferred Income Tax Expense (Benefit) Tax Rate Change |  | (13) |
Tax expense (benefit) of operating loss carryforwards [Abstract] |  |  |
Total income tax from continuing operations |  |  | (13)
Income tax expense [Abstract] |  |  |
Total income tax from continuing operations |  |  | (13)
Increase (decrease) due to: |  |  |
Total income tax from continuing operations |  |  | (13)
LG And E And KU Energy LLC [Member] |  |  |
Income Tax Expense (Benefit) |  |  |
Current - Federal | 20 | 31 | 74
Current - State | 0 | 4 | 6
Total Current Expense | 20 | 35 | 80
Deferred - Federal | 81 | 65 | 268
Deferred - State | 5 | 34 | 32
Total Deferred Expense (Benefit), excluding operating loss carry forwards | 86 | 99 | 300
Amortization of investment tax credit | (3) | (3) | (3)
Tax expense (benefit) of operating loss carryforwards [Abstract] |  |  |
Deferred - Federal | 0 | (2) | (2)
Total Tax Expense (Benefit) of Operating Loss Carryforwards | 0 | (2) | (2)
Total income tax from continuing operations | 103 | 129 | 375
Income tax expense [Abstract] |  |  |
Total income tax expense - Federal | 98 | 91 | 337
Total income tax expense - State | 5 | 38 | 38
Total income tax from continuing operations | 103 | 129 | 375
Income Tax Expense (Benefit) Excluded From Income Taxes [Abstract] |  |  |
Other comprehensive income | (1) | 5 | (10)
Reconciliation of Income Tax Expense |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | 120 | 121 | 242
Increase (decrease) due to: |  |  |
State income taxes, net of federal income tax benefit | 23 | 22 | 26
Valuation allowance adjustments | (23) | (20) | (2)
Amortization of investment tax credit | (3) | (3) | (3)
Deferred tax impact of U.S. tax reform | 0 | 0 | 112
Deferred tax impact of Kentucky tax reform | 0 | 9 | 0
Kentucky recycling credit, net of federal income tax expense | (18) | 0 | 0
Other | 4 | 0 | 0
Total increase (decrease) | (17) | 8 | 133
Total income tax from continuing operations | $ 103 | $ 129 | $ 375
Effective income tax rate | 18.00% | 22.50% | 54.30%
Taxes, other than income |  |  |
Domestic property and other | $ 74 | $ 70 | $ 65
Total | 74 | 70 | 65
LG And E And KU Energy LLC [Member] | Tax Cuts And Jobs Act [Member] |  |  |
Income Tax Expense (Benefit) |  |  |
Deferred Income Tax Expense (Benefit) Tax Rate Change |  | 108 |
Deferred Income Tax Expense (Benefit) Expiring Tax Credit |  | 4 |
Tax expense (benefit) of operating loss carryforwards [Abstract] |  |  |
Total income tax from continuing operations |  |  | 112
Income tax expense [Abstract] |  |  |
Total income tax from continuing operations |  |  | 112
Increase (decrease) due to: |  |  |
Total income tax from continuing operations |  |  | 112
Deferred Income Tax Expense Benefit Tax Reform |  | 112 |
Louisville Gas And Electric Co [Member] |  |  |
Income Tax Expense (Benefit) |  |  |
Current - Federal | 4 | 0 | 0
Current - State | 4 | 4 | 5
Total Current Expense | 8 | 4 | 5
Deferred - Federal | 46 | 51 | 112
Deferred - State | 10 | 10 | 14
Total Deferred Expense (Benefit), excluding operating loss carry forwards | 56 | 61 | 126
Amortization of investment tax credit | (1) | (1) | (1)
Tax expense (benefit) of operating loss carryforwards [Abstract] |  |  |
Deferred - Federal | 0 | 0 | 1
Total Tax Expense (Benefit) of Operating Loss Carryforwards | 0 | 0 | 1
Total income tax from continuing operations | 63 | 64 | 131
Income tax expense [Abstract] |  |  |
Total income tax expense - Federal | 49 | 50 | 112
Total income tax expense - State | 14 | 14 | 19
Total income tax from continuing operations | 63 | 64 | 131
Reconciliation of Income Tax Expense |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | 62 | 62 | 120
Increase (decrease) due to: |  |  |
State income taxes, net of federal income tax benefit | 12 | 11 | 14
Valuation allowance adjustments | 14 | 0 | 0
Amortization of excess deferred federal and state income taxes | (10) | (8) | (1)
Kentucky recycling credit, net of federal income tax expense | (14) | 0 | 0
Other | (1) | (1) | (2)
Total increase (decrease) | 1 | 2 | 11
Total income tax from continuing operations | $ 63 | $ 64 | $ 131
Effective income tax rate | 21.40% | 21.50% | 38.10%
Taxes, other than income |  |  |
Domestic property and other | $ 39 | $ 36 | $ 33
Total | 39 | 36 | 33
Louisville Gas And Electric Co [Member] | Tax Cuts And Jobs Act [Member] |  |  |
Tax expense (benefit) of operating loss carryforwards [Abstract] |  |  |
Total income tax from continuing operations |  |  | 0
Income tax expense [Abstract] |  |  |
Total income tax from continuing operations |  |  | 0
Increase (decrease) due to: |  |  |
Total income tax from continuing operations |  |  | 0
Kentucky Utilities Co [Member] |  |  |
Income Tax Expense (Benefit) |  |  |
Current - Federal | 35 | 22 | 0
Current - State | 5 | 6 | 7
Total Current Expense | 40 | 28 | 7
Deferred - Federal | 28 | 40 | 138
Deferred - State | 13 | 10 | 16
Total Deferred Expense (Benefit), excluding operating loss carry forwards | 41 | 50 | 154
Amortization of investment tax credit | (2) | (2) | (2)
Tax expense (benefit) of operating loss carryforwards [Abstract] |  |  |
Total income tax from continuing operations | 79 | 76 | 159
Income tax expense [Abstract] |  |  |
Total income tax expense - Federal | 61 | 60 | 136
Total income tax expense - State | 18 | 16 | 23
Total income tax from continuing operations | 79 | 76 | 159
Reconciliation of Income Tax Expense |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | 78 | 76 | 146
Increase (decrease) due to: |  |  |
State income taxes, net of federal income tax benefit | 15 | 13 | 15
Valuation allowance adjustments | 4 | 0 | 0
Amortization of investment tax credit | (2) | (2) | (2)
Amortization of excess deferred federal and state income taxes | (13) | (12) | (1)
Kentucky recycling credit, net of federal income tax expense | (4) | 0 | 0
Other | 1 | 1 | 1
Total increase (decrease) | 1 | 0 | 13
Total income tax from continuing operations | $ 79 | $ 76 | $ 159
Effective income tax rate | 21.20% | 21.00% | 38.00%
Taxes, other than income |  |  |
Domestic property and other | $ 35 | $ 34 | $ 32
Total | $ 35 | $ 34 | 32
Kentucky Utilities Co [Member] | Tax Cuts And Jobs Act [Member] |  |  |
Tax expense (benefit) of operating loss carryforwards [Abstract] |  |  |
Total income tax from continuing operations |  |  | 0
Income tax expense [Abstract] |  |  |
Total income tax from continuing operations |  |  | 0
Increase (decrease) due to: |  |  |
Total income tax from continuing operations |  |  | $ 0

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- Definition The total of increases (decreases) to federal income tax on income from continuing operations before income taxes at statutory tax rate. + References No definition available. + Details
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