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Income and Other Taxes (Income Tax Expense and Reconciliation of Income Tax Expense) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Income Tax Expense (Benefit) |  |  |
Current - Federal | $ 46 | $ 23 | $ (175)
Current - State | 53 | 9 | 37
Total Current Expense | 99 | 32 | (138)
Deferred - Federal | 172 | 137 | 286
Deferred - State | 27 | 64 | 48
Total Deferred Expense (Benefit), excluding operating loss carry forwards | 199 | 201 | 334
Amortization of investment tax credit | (3) | (3) | (3)
Tax expense (benefit) of operating loss carryforwards [Abstract] |  |  |
Deferred - Federal | 1 | 1 | 3
Deferred - State | (5) | (3) | (12)
Total Tax Expense (Benefit) of Operating Loss Carryforwards | (4) | (2) | (9)
Total income tax from continuing operations | 291 | 228 | 184
Income tax expense [Abstract] |  |  |
Total income tax expense - Federal | 216 | 158 | 111
Total income tax expense - State | 75 | 70 | 73
Total income tax from continuing operations | 291 | 228 | 184
Income Tax Expense (Benefit) Excluded From Income Taxes [Abstract] |  |  |
Income tax related to other comprehensive income | (6) | (8) | (14)
Valuation allowance on state deferred taxes recorded to other comprehensive income | 0 | 0 | (1)
Total income tax expense (benefits) excluded from income taxes from continuing operations | (6) | (8) | (15)
Reconciliation of Income Tax Expense |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | $ 309 | $ 234 | $ 194
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent | 5.00% | 6.10% | 7.50%
Increase (decrease) due to: |  |  |
State income taxes, net of federal income tax benefit | $ 75 | $ 67 | $ 69
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Percent | (1.10%) | (0.50%) | (2.10%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent | (0.10%) | (0.50%) | (0.70%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount | $ (1) | $ (5) | $ (7)
Effective Income Tax Rate Reconciliation, Tax Credit, Percent | (1.20%) | (1.00%) | (2.80%)
Income tax credits | $ (18) | $ (10) | $ (26)
Amortization of investment tax credit | (17) | (5) | (19)
Amortization of excess deferred federal and state income taxes | $ (51) | $ (46) | $ (48)
Allowance for Funds Used During Construction Equity, Percent | (1.30%) | (0.90%) | (0.70%)
Flow-through rate-making, Percent | (0.60%) | (1.00%) | (0.50%)
Flow-through rate-making | $ (10) | $ (11) | $ (4)
Utility Rate-Making Tax Adjustments (Federal and State), Percent | (5.30%) | (6.00%) | (6.40%)
Utility Rate-Making Tax Adjustments (Federal and State) | $ (81) | $ (67) | $ (58)
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent | 0.30% | 0.30% | 0.60%
Other | $ 6 | $ 4 | $ 5
Total Increase (Decrease) to Federal Income Tax On Income Before Income Taxes At Statutory Tax Rate, Percent | (1.20%) | (0.60%) | (1.10%)
Total Increase (Decrease) to Federal Income Tax On Income Before Income Taxes At Statutory Tax Rate | $ (18) | $ (6) | $ (10)
Total income tax from continuing operations | $ 291 | $ 228 | $ 184
Effective income tax rate | 19.80% | 20.40% | 19.90%
Taxes, other than income |  |  |
State gross receipts | $ 214 | $ 167 | $ 195
Domestic property and other | 209 | 207 | 197
Total | 423 | 374 | 392
Deferred Tax Assets, Valuation Allowances | 184 | 224 |
Renewable Tax Credits Utilized | 138 | 61 | 250
Renewable Tax Credits Purchased | 153 | 27 | 300
Allowance for Funds Used During Construction Equity | $ (20) | $ (10) | $ (6)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 21.00% | 21.00%
Amortization Of Excess Deferred Income Taxes, Percent | (3.40%) | (4.10%) | (5.20%)
Proceeds from Income Tax Refunds |  |  | $ 55
Income Tax Paid, Federal, after Refund Received | $ 66 | $ (149) | 252
Purchase Price of Transferrable Credits | 40 | 20 | 282
Refund For The Carry-Back of Acquired Transferrable Tax Credits |  | 200 |
PENNSYLVANIA |  |  |
Taxes, other than income |  |  |
Income Tax Paid, State and Local, after Refund Received | 20 | 21 | 24
KENTUCKY |  |  |
Taxes, other than income |  |  |
Income Tax Paid, State and Local, after Refund Received | 6 | 4 | 4
Other States |  |  |
Taxes, other than income |  |  |
Income Tax Paid, State and Local, after Refund Received | 1 | 1 | 1
PPL Electric Utilities Corp [Member] |  |  |
Income Tax Expense (Benefit) |  |  |
Current - Federal | 136 | 44 | 91
Current - State | 44 | 4 | 31
Total Current Expense | 180 | 48 | 122
Deferred - Federal | 17 | 86 | 28
Deferred - State | 7 | 42 | 18
Total Deferred Expense (Benefit), excluding operating loss carry forwards | 24 | 128 | 46
Tax expense (benefit) of operating loss carryforwards [Abstract] |  |  |
Total income tax from continuing operations | 204 | 176 | 168
Income tax expense [Abstract] |  |  |
Total income tax expense - Federal | 153 | 130 | 119
Total income tax expense - State | 51 | 46 | 49
Total income tax from continuing operations | 204 | 176 | 168
Reconciliation of Income Tax Expense |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | $ 177 | $ 158 | $ 144
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent | 6.10% | 6.20% | 7.10%
Increase (decrease) due to: |  |  |
State income taxes, net of federal income tax benefit | $ 52 | $ 47 | $ 48
Amortization of excess deferred federal and state income taxes | $ (10) | $ (10) | $ (11)
Allowance for Funds Used During Construction Equity, Percent | (1.00%) | (0.70%) | (0.70%)
Flow-through rate-making, Percent | (1.20%) | (1.50%) | (0.70%)
Flow-through rate-making | $ (10) | $ (11) | $ (4)
Utility Rate-Making Tax Adjustments (Federal and State), Percent | (3.40%) | (3.50%) | (3.00%)
Utility Rate-Making Tax Adjustments (Federal and State) | $ (28) | $ (27) | $ (19)
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent | 0.50% | (0.20%) | (0.60%)
Other | $ 3 | $ (2) | $ (5)
Total Increase (Decrease) to Federal Income Tax On Income Before Income Taxes At Statutory Tax Rate, Percent | 3.20% | 2.50% | 3.50%
Total Increase (Decrease) to Federal Income Tax On Income Before Income Taxes At Statutory Tax Rate | $ 27 | $ 18 | $ 24
Total income tax from continuing operations | $ 204 | $ 176 | $ 168
Effective income tax rate | 24.20% | 23.50% | 24.50%
Taxes, other than income |  |  |
State gross receipts | $ 144 | $ 122 | $ 136
Domestic property and other | 7 | 9 | 7
Total | 151 | 131 | 143
Allowance for Funds Used During Construction Equity | $ (8) | $ (6) | $ (4)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 21.00% | 21.00%
Amortization Of Excess Deferred Income Taxes, Percent | (1.20%) | (1.30%) | (1.60%)
Income Tax Paid, Federal, after Refund Received | $ 109 | $ 62 | $ 68
PPL Electric Utilities Corp [Member] | PENNSYLVANIA |  |  |
Taxes, other than income |  |  |
Income Tax Paid, State and Local, after Refund Received | 20 | 21 | 24
Louisville Gas And Electric Co [Member] |  |  |
Income Tax Expense (Benefit) |  |  |
Current - Federal | 72 | 60 | 70
Current - State | 14 | 11 | 13
Total Current Expense | 86 | 71 | 83
Deferred - Federal | (10) | 1 | (15)
Deferred - State | 3 | 6 | 2
Total Deferred Expense (Benefit), excluding operating loss carry forwards | (7) | 7 | (13)
Amortization of investment tax credit | (1) | (1) | (1)
Tax expense (benefit) of operating loss carryforwards [Abstract] |  |  |
Total income tax from continuing operations | 78 | 77 | 69
Income tax expense [Abstract] |  |  |
Total income tax expense - Federal | 61 | 60 | 54
Total income tax expense - State | 17 | 17 | 15
Total income tax from continuing operations | 78 | 77 | 69
Reconciliation of Income Tax Expense |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | $ 81 | $ 79 | $ 70
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent | 3.80% | 3.70% | 3.80%
Increase (decrease) due to: |  |  |
State income taxes, net of federal income tax benefit | $ 15 | $ 14 | $ 13
Amortization of excess deferred federal and state income taxes | $ (14) | $ (13) | $ (13)
Allowance for Funds Used During Construction Equity, Percent | (1.10%) | (0.40%) | (0.30%)
Utility Rate-Making Tax Adjustments (Federal and State), Percent | (4.60%) | (3.80%) | (4.20%)
Utility Rate-Making Tax Adjustments (Federal and State) | $ (18) | $ (15) | $ (14)
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent | 0.00% | (0.30%) | 0.00%
Other | $ 0 | $ (1) | $ 0
Total Increase (Decrease) to Federal Income Tax On Income Before Income Taxes At Statutory Tax Rate, Percent | (0.80%) | (0.40%) | (0.40%)
Total Increase (Decrease) to Federal Income Tax On Income Before Income Taxes At Statutory Tax Rate | $ (3) | $ (2) | $ (1)
Total income tax from continuing operations | $ 78 | $ 77 | $ 69
Effective income tax rate | 20.20% | 20.60% | 20.60%
Taxes, other than income |  |  |
Domestic property and other | $ 51 | $ 49 | $ 48
Total | 51 | 49 | 48
Deferred Tax Assets, Valuation Allowances | 5 | 6 |
Allowance for Funds Used During Construction Equity | $ (4) | $ (2) | $ (1)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 21.00% | 21.00%
Amortization Of Excess Deferred Income Taxes, Percent | (3.50%) | (3.40%) | (3.90%)
Income Tax Paid, Federal, after Refund Received | $ 67 | $ 62 | $ 71
Louisville Gas And Electric Co [Member] | KENTUCKY |  |  |
Taxes, other than income |  |  |
Income Tax Paid, State and Local, after Refund Received | 14 | 11 | 13
Kentucky Utilities Co [Member] |  |  |
Income Tax Expense (Benefit) |  |  |
Current - Federal | 83 | 87 | 73
Current - State | 16 | 17 | 13
Total Current Expense | 99 | 104 | 86
Deferred - Federal | (4) | (15) | (11)
Deferred - State | 6 | 2 | 4
Total Deferred Expense (Benefit), excluding operating loss carry forwards | 2 | (13) | (7)
Amortization of investment tax credit | (2) | (2) | (2)
Tax expense (benefit) of operating loss carryforwards [Abstract] |  |  |
Total income tax from continuing operations | 99 | 89 | 77
Income tax expense [Abstract] |  |  |
Total income tax expense - Federal | 77 | 70 | 60
Total income tax expense - State | 22 | 19 | 17
Total income tax from continuing operations | 99 | 89 | 77
Reconciliation of Income Tax Expense |  |  |
Federal income tax on Income Before Income Taxes at statutory tax rate | $ 104 | $ 93 | $ 82
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent | 3.80% | 3.70% | 3.80%
Increase (decrease) due to: |  |  |
State income taxes, net of federal income tax benefit | $ 19 | $ 16 | $ 15
Amortization of excess deferred federal and state income taxes | $ (18) | $ (17) | $ (17)
Allowance for Funds Used During Construction Equity, Percent | (1.00%) | (0.60%) | 0.00%
Utility Rate-Making Tax Adjustments (Federal and State), Percent | (4.60%) | (4.30%) | (4.30%)
Utility Rate-Making Tax Adjustments (Federal and State) | $ (23) | $ (19) | $ (17)
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent | (0.30%) | (0.40%) | (0.70%)
Other | $ (1) | $ (1) | $ (3)
Total Increase (Decrease) to Federal Income Tax On Income Before Income Taxes At Statutory Tax Rate, Percent | (1.10%) | (1.00%) | (1.20%)
Total Increase (Decrease) to Federal Income Tax On Income Before Income Taxes At Statutory Tax Rate | $ (5) | $ (4) | $ (5)
Total income tax from continuing operations | $ 99 | $ 89 | $ 77
Effective income tax rate | 19.90% | 20.00% | 19.80%
Taxes, other than income |  |  |
Domestic property and other | $ 51 | $ 49 | $ 45
Total | 51 | 49 | 45
Deferred Tax Assets, Valuation Allowances | 1 | 2 |
Allowance for Funds Used During Construction Equity | $ (5) | $ (2) | $ 0
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 21.00% | 21.00%
Amortization Of Excess Deferred Income Taxes, Percent | (3.60%) | (3.70%) | (4.30%)
Income Tax Paid, Federal, after Refund Received | $ 78 | $ 85 | $ 65
Kentucky Utilities Co [Member] | KENTUCKY |  |  |
Taxes, other than income |  |  |
Income Tax Paid, State and Local, after Refund Received | 15 | 16 | 12
Kentucky Utilities Co [Member] | Other States |  |  |
Taxes, other than income |  |  |
Income Tax Paid, State and Local, after Refund Received | $ 1 | $ 1 | $ 1

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