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v3.25.4

Accounting Policies (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Utility Revenue (Details) [Abstract] |  |  |  |
Operating Revenues | $ 9,042 | $ 8,462 | $ 8,312 |
Restricted Cash and Cash Equivalent [Abstract] |  |  |  |
Cash and cash equivalents | 1,071 | 306 |  |
Total Cash, Cash Equivalents and Restricted Cash | 1,086 | 339 | 382 | $ 357
Property, Plant and Equipment (Numeric) [Abstract] |  |  |  |
Interest costs, capitalized during the period | $ 32 | 20 | $ 12 |
Discount Rate Change For United Kingdom Pension Plans Numeric [Abstract] |  |  |  |
Percentage in excess of gains and losses equal to the plan's projected benefit obligation to use accelerated amortization | 30.00% |  |  |
Minimum percentage of gains and losses under the accelerated method that are amortized on a straight line basis | 10.00% |  |  |
Maximum percentage of gains and losses under the accelerated that are amortized on a straight line basis | 30.00% |  |  |
Income Taxes [Abstract] |  |  |  |
Minimum percentage to be attained of likelihood of uncertain tax position being realized | 50.00% |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | $ 551 | 511 |  |
Balance Sheet Classification of Deferred Taxes [Abstract] |  |  |  |
Goodwill | 2,247 | 2,247 |  |
Fuel [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 157 | 153 |  |
Natural Gas Stored Underground [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 50 | 49 |  |
Material And Supplies [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | $ 344 | $ 309 |  |
Regulated Operations [Member] | Utility Plant [Member] |  |  |  |
Depreciation (Details) [Abstract] |  |  |  |
Weighted-average rates | 3.06% | 3.20% | 3.26% |
Allowance For Doubtful Accounts [Member] |  |  |  |
Allowance for Doubtful Accounts (Details) [Roll Forward] |  |  |  |
Balance at beginning of period | $ 154 | $ 130 | $ 95 |
Additions charged to income | 84 | 109 | 87 |
Deductions | 98 | 85 | 52 |
Balance at end of period | 140 | 154 | 130 |
PPL Electric Utilities Corp [Member] |  |  |  |
Utility Revenue (Details) [Abstract] |  |  |  |
Operating Revenues | 3,113 | 2,876 | 3,008 |
Restricted Cash and Cash Equivalent [Abstract] |  |  |  |
Cash and cash equivalents | 30 | 24 |  |
Total Cash, Cash Equivalents and Restricted Cash | 30 | 24 | 51 | 25
Property, Plant and Equipment (Numeric) [Abstract] |  |  |  |
Interest costs, capitalized during the period | 13 | 9 | $ 7 |
Income Taxes [Abstract] |  |  |  |
Intercompany tax receivables (payables) | (27) | (2) |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 151 | 104 |  |
PPL Electric Utilities Corp [Member] | Fuel [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 0 | 0 |  |
PPL Electric Utilities Corp [Member] | Natural Gas Stored Underground [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 0 | 0 |  |
PPL Electric Utilities Corp [Member] | Material And Supplies [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | $ 151 | $ 104 |  |
PPL Electric Utilities Corp [Member] | Regulated Operations [Member] | Utility Plant [Member] |  |  |  |
Depreciation (Details) [Abstract] |  |  |  |
Weighted-average rates | 2.46% | 2.52% | 2.62% |
PPL Electric Utilities Corp [Member] | Allowance For Doubtful Accounts [Member] |  |  |  |
Allowance for Doubtful Accounts (Details) [Roll Forward] |  |  |  |
Balance at beginning of period | $ 41 | $ 50 | $ 33 |
Additions charged to income | 33 | 56 | 52 |
Deductions | 35 | 65 | 35 |
Balance at end of period | 39 | 41 | 50 |
Louisville Gas And Electric Co [Member] |  |  |  |
Utility Revenue (Details) [Abstract] |  |  |  |
Operating Revenues | 1,748 | 1,648 | 1,613 |
Restricted Cash and Cash Equivalent [Abstract] |  |  |  |
Cash and cash equivalents | 162 | 8 |  |
Total Cash, Cash Equivalents and Restricted Cash | 169 | 24 | 44 | 93
Property, Plant and Equipment (Numeric) [Abstract] |  |  |  |
Interest costs, capitalized during the period | 6 | 3 | $ 1 |
Income Taxes [Abstract] |  |  |  |
Intercompany tax receivables (payables) | (7) | (2) |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 160 | 157 |  |
Balance Sheet Classification of Deferred Taxes [Abstract] |  |  |  |
Goodwill | 389 | 389 |  |
Louisville Gas And Electric Co [Member] | Fuel [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 58 | 64 |  |
Louisville Gas And Electric Co [Member] | Natural Gas Stored Underground [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 33 | 29 |  |
Louisville Gas And Electric Co [Member] | Material And Supplies [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | $ 69 | $ 64 |  |
Louisville Gas And Electric Co [Member] | Regulated Operations [Member] | Utility Plant [Member] |  |  |  |
Depreciation (Details) [Abstract] |  |  |  |
Weighted-average rates | 3.69% | 4.02% | 4.00% |
Louisville Gas And Electric Co [Member] | Allowance For Doubtful Accounts [Member] |  |  |  |
Allowance for Doubtful Accounts (Details) [Roll Forward] |  |  |  |
Balance at beginning of period | $ 3 | $ 6 | $ 4 |
Additions charged to income | 4 | 4 | 4 |
Deductions | 2 | 7 | 2 |
Balance at end of period | 5 | 3 | 6 |
Kentucky Utilities Co [Member] |  |  |  |
Utility Revenue (Details) [Abstract] |  |  |  |
Operating Revenues | 2,064 | 1,964 | 1,884 |
Restricted Cash and Cash Equivalent [Abstract] |  |  |  |
Cash and cash equivalents | 10 | 13 |  |
Total Cash, Cash Equivalents and Restricted Cash | 17 | 29 | 38 | $ 21
Property, Plant and Equipment (Numeric) [Abstract] |  |  |  |
Interest costs, capitalized during the period | 8 | 4 | $ 1 |
Income Taxes [Abstract] |  |  |  |
Intercompany tax receivables (payables) | (10) | (5) |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 183 | 173 |  |
Balance Sheet Classification of Deferred Taxes [Abstract] |  |  |  |
Goodwill | 607 | 607 |  |
Kentucky Utilities Co [Member] | Fuel [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 99 | 89 |  |
Kentucky Utilities Co [Member] | Natural Gas Stored Underground [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 0 | 0 |  |
Kentucky Utilities Co [Member] | Material And Supplies [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | $ 84 | $ 84 |  |
Kentucky Utilities Co [Member] | Regulated Operations [Member] | Utility Plant [Member] |  |  |  |
Depreciation (Details) [Abstract] |  |  |  |
Weighted-average rates | 3.68% | 3.86% | 3.95% |
Kentucky Utilities Co [Member] | Allowance For Doubtful Accounts [Member] |  |  |  |
Allowance for Doubtful Accounts (Details) [Roll Forward] |  |  |  |
Balance at beginning of period | $ 2 | $ 2 | $ 3 |
Additions charged to income | 5 | 4 | 3 |
Deductions | 3 | 4 | 4 |
Balance at end of period | $ 4 | $ 2 | $ 2 |

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