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Accounting Policies (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Utility Revenue (Details) [Abstract] |  |  |  |
Operating Revenues | $ 7,902 | $ 5,783 | $ 5,474 |
Restricted Cash and Cash Equivalents [Abstract] |  |  |  |
Cash and cash equivalents | 356 | 3,571 |  |
Total Cash, Cash Equivalents and Restricted Cash | 357 | 3,572 | 443 | $ 660
Property, Plant and Equipment (Numeric) [Abstract] |  |  |  |
Interest costs, capitalized during the period | $ 7 | 6 | $ 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 | $ 443 | 322 |  |
Balance Sheet Classification of Deferred Taxes [Abstract] |  |  |  |
Goodwill | 2,248 | 716 |  |
Fuel [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 125 | 90 |  |
Natural Gas Stored Underground [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 91 | 54 |  |
Material And Supplies [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | $ 227 | $ 178 |  |
Regulated Operations [Member] | Utility Plant [Member] |  |  |  |
Depreciation (Details) [Abstract] |  |  |  |
Weighted-average rates | 3.21% | 3.61% | 3.53% |
Allowance For Doubtful Accounts [Member] |  |  |  |
Allowance for Doubtful Accounts (Details) [Roll Forward] |  |  |  |
Balance at beginning of period | $ 69 | $ 73 | $ 58 |
Additions charged to income | 78 | 26 | 28 |
Deductions | 52 | 30 | 13 |
Balance at end of period | 95 | 69 | 73 |
PPL Electric Utilities Corp [Member] |  |  |  |
Utility Revenue (Details) [Abstract] |  |  |  |
Operating Revenues | 3,030 | 2,402 | 2,331 |
Restricted Cash and Cash Equivalents [Abstract] |  |  |  |
Cash and cash equivalents | 25 | 21 |  |
Total Cash, Cash Equivalents and Restricted Cash | 25 | 21 | 40 | 264
Property, Plant and Equipment (Numeric) [Abstract] |  |  |  |
Interest costs, capitalized during the period | 5 | 6 | $ 7 |
Income Taxes [Abstract] |  |  |  |
Intercompany tax receivables (payables) | 2 | (4) |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 69 | 61 |  |
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 | $ 69 | $ 61 |  |
PPL Electric Utilities Corp [Member] | Regulated Operations [Member] | Utility Plant [Member] |  |  |  |
Depreciation (Details) [Abstract] |  |  |  |
Weighted-average rates | 2.75% | 3.05% | 2.99% |
PPL Electric Utilities Corp [Member] | Allowance For Doubtful Accounts [Member] |  |  |  |
Allowance for Doubtful Accounts (Details) [Roll Forward] |  |  |  |
Balance at beginning of period | $ 35 | $ 41 | $ 30 |
Additions charged to income | 27 | 13 | 19 |
Deductions | 29 | 19 | 8 |
Balance at end of period | 33 | 35 | 41 |
Louisville Gas And Electric Co [Member] |  |  |  |
Utility Revenue (Details) [Abstract] |  |  |  |
Operating Revenues | 1,798 | 1,569 | 1,456 |
Restricted Cash and Cash Equivalents [Abstract] |  |  |  |
Cash and cash equivalents | 93 | 9 | $ 7 | 15
Income Taxes [Abstract] |  |  |  |
Intercompany tax receivables (payables) | (6) | 4 |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 166 | 137 |  |
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 | 44 | 32 |  |
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 | 68 | 54 |  |
Louisville Gas And Electric Co [Member] | Material And Supplies [Member] |  |  |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | $ 54 | $ 51 |  |
Louisville Gas And Electric Co [Member] | Regulated Operations [Member] | Utility Plant [Member] |  |  |  |
Depreciation (Details) [Abstract] |  |  |  |
Weighted-average rates | 4.16% | 3.99% | 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 | $ 3 | $ 1 |
Additions charged to income | 6 | 4 | 4 |
Deductions | 5 | 4 | 2 |
Balance at end of period | 4 | 3 | 3 |
Kentucky Utilities Co [Member] |  |  |  |
Utility Revenue (Details) [Abstract] |  |  |  |
Operating Revenues | 2,074 | 1,826 | 1,690 |
Restricted Cash and Cash Equivalents [Abstract] |  |  |  |
Cash and cash equivalents | 21 | 13 | $ 22 | $ 12
Income Taxes [Abstract] |  |  |  |
Intercompany tax receivables (payables) | 4 | 1 |  |
Fuel, Materials and Supplies (Details) [Abstract] |  |  |  |
Fuel, materials and supplies on the Balance Sheet | 167 | 124 |  |
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 | 81 | 58 |  |
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 | $ 86 | $ 66 |  |
Kentucky Utilities Co [Member] | Regulated Operations [Member] | Utility Plant [Member] |  |  |  |
Depreciation (Details) [Abstract] |  |  |  |
Weighted-average rates | 4.01% | 4.17% | 4.00% |
Kentucky Utilities Co [Member] | Allowance For Doubtful Accounts [Member] |  |  |  |
Allowance for Doubtful Accounts (Details) [Roll Forward] |  |  |  |
Balance at beginning of period | $ 3 | $ 2 | $ 1 |
Additions charged to income | 6 | 8 | 4 |
Deductions | 6 | 7 | 3 |
Balance at end of period | $ 3 | $ 3 | $ 2 |

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