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Accounting Policies (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Utility Revenue (Details) [Abstract] |  |  |  |
Operating Revenues | $ 8,462 | $ 8,312 | $ 7,902 |
Restricted Cash and Cash Equivalents [Abstract] |  |  |  |
Cash and cash equivalents | 306 | 331 |  |
Total Cash, Cash Equivalents and Restricted Cash | 339 | 382 | 357 | $ 3,572
Property, Plant and Equipment (Numeric) [Abstract] |  |  |  |
Interest costs, capitalized during the period | $ 20 | 12 | $ 7 |
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 | $ 511 | 505 |  |
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 | 153 | 144 |  |
Natural Gas Stored Underground [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 49 | 58 |  |
Material And Supplies [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | $ 309 | $ 303 |  |
Regulated Operations [Member] | Utility Plant [Member] |  |  |  |
Depreciation (Details) [Abstract] |  |  |  |
Weighted-average rates | 3.20% | 3.26% | 3.21% |
Allowance For Doubtful Accounts [Member] |  |  |  |
Allowance for Doubtful Accounts (Details) [Roll Forward] |  |  |  |
Balance at beginning of period | $ 130 | $ 95 | $ 69 |
Additions charged to income | 109 | 87 | 78 |
Deductions | 85 | 52 | 52 |
Balance at end of period | 154 | 130 | 95 |
PPL Electric Utilities Corp [Member] |  |  |  |
Utility Revenue (Details) [Abstract] |  |  |  |
Operating Revenues | 2,876 | 3,008 | 3,030 |
Restricted Cash and Cash Equivalents [Abstract] |  |  |  |
Cash and cash equivalents | 24 | 51 |  |
Total Cash, Cash Equivalents and Restricted Cash | 24 | 51 | 25 | 21
Property, Plant and Equipment (Numeric) [Abstract] |  |  |  |
Interest costs, capitalized during the period | 9 | 7 | $ 5 |
Income Taxes [Abstract] |  |  |  |
Intercompany tax receivables (payables) | (2) | (21) |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 104 | 99 |  |
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 | $ 104 | $ 99 |  |
PPL Electric Utilities Corp [Member] | Regulated Operations [Member] | Utility Plant [Member] |  |  |  |
Depreciation (Details) [Abstract] |  |  |  |
Weighted-average rates | 2.52% | 2.62% | 2.75% |
PPL Electric Utilities Corp [Member] | Allowance For Doubtful Accounts [Member] |  |  |  |
Allowance for Doubtful Accounts (Details) [Roll Forward] |  |  |  |
Balance at beginning of period | $ 50 | $ 33 | $ 35 |
Additions charged to income | 56 | 52 | 27 |
Deductions | 65 | 35 | 29 |
Balance at end of period | 41 | 50 | 33 |
Louisville Gas And Electric Co [Member] |  |  |  |
Utility Revenue (Details) [Abstract] |  |  |  |
Operating Revenues | 1,648 | 1,613 | 1,798 |
Restricted Cash and Cash Equivalents [Abstract] |  |  |  |
Cash and cash equivalents | 8 | 18 |  |
Total Cash, Cash Equivalents and Restricted Cash | 24 | 44 | $ 93 | 9
Income Taxes [Abstract] |  |  |  |
Intercompany tax receivables (payables) | (2) | (5) |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 157 | 143 |  |
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 | 64 | 50 |  |
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 | 29 | 34 |  |
Louisville Gas And Electric Co [Member] | Material And Supplies [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | $ 64 | $ 59 |  |
Louisville Gas And Electric Co [Member] | Regulated Operations [Member] | Utility Plant [Member] |  |  |  |
Depreciation (Details) [Abstract] |  |  |  |
Weighted-average rates | 4.02% | 4.00% | 4.16% |
Louisville Gas And Electric Co [Member] | Allowance For Doubtful Accounts [Member] |  |  |  |
Allowance for Doubtful Accounts (Details) [Roll Forward] |  |  |  |
Balance at beginning of period | $ 6 | $ 4 | $ 3 |
Additions charged to income | 4 | 4 | 6 |
Deductions | 7 | 2 | 5 |
Balance at end of period | 3 | 6 | 4 |
Kentucky Utilities Co [Member] |  |  |  |
Utility Revenue (Details) [Abstract] |  |  |  |
Operating Revenues | 1,964 | 1,884 | 2,074 |
Restricted Cash and Cash Equivalents [Abstract] |  |  |  |
Cash and cash equivalents | 13 | 14 |  |
Total Cash, Cash Equivalents and Restricted Cash | 29 | 38 | $ 21 | $ 13
Income Taxes [Abstract] |  |  |  |
Intercompany tax receivables (payables) | (5) | (3) |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 173 | 185 |  |
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 | 89 | 94 |  |
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 | $ 91 |  |
Kentucky Utilities Co [Member] | Regulated Operations [Member] | Utility Plant [Member] |  |  |  |
Depreciation (Details) [Abstract] |  |  |  |
Weighted-average rates | 3.86% | 3.95% | 4.01% |
Kentucky Utilities Co [Member] | Allowance For Doubtful Accounts [Member] |  |  |  |
Allowance for Doubtful Accounts (Details) [Roll Forward] |  |  |  |
Balance at beginning of period | $ 2 | $ 3 | $ 3 |
Additions charged to income | 4 | 3 | 6 |
Deductions | 4 | 4 | 6 |
Balance at end of period | 2 | 2 | 3 |
Louisville Gas and Electric [Member] |  |  |  |
Property, Plant and Equipment (Numeric) [Abstract] |  |  |  |
Interest costs, capitalized during the period | 3 | 1 | 0 |
Kentucky Utilities [Member] |  |  |  |
Property, Plant and Equipment (Numeric) [Abstract] |  |  |  |
Interest costs, capitalized during the period | $ 4 | $ 1 | $ 0 |

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