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Revenue from Contracts with Customers (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |  |
Operating Revenues | $ 1,881 | $ 1,823 | $ 4,185 | $ 4,238 |  |
Alternative Revenue Programs | (3) | 5 | 5 | 42 |  |
Other Revenue | (4) | (7) | (12) | (11) |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 1,874 | 1,821 | 4,178 | 4,269 |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) | 2 | 6 | 43 | 26 |  |
Contract with Customer, Liability | 31 | 48 | 31 | 48 | $ 43 | $ 34
Contract with Customer, Liability, Revenue Recognized |  |  | 25 | 18 |  |
Residential [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 797 | 779 | 1,927 | 2,079 |  |
Commercial [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 388 | 391 | 839 | 914 |  |
Industrial [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 170 | 175 | 348 | 371 |  |
Other [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 252 | 228 | 524 | 516 |  |
Wholesale - municipal [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 5 | 4 | 11 | 11 |  |
Wholesale - other [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 13 | 9 | 28 | 20 |  |
Transmission [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 249 | 235 | 501 | 358 |  |
Pennsylvania Regulated [Member] |  |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |  |
Operating Revenues | 673 | 667 | 1,443 | 1,558 |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 662 | 668 | 1,424 | 1,558 |  |
Pennsylvania Regulated [Member] | Residential [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 332 | 340 | 758 | 968 |  |
Pennsylvania Regulated [Member] | Commercial [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 101 | 105 | 207 | 253 |  |
Pennsylvania Regulated [Member] | Industrial [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 10 | 11 | 22 | 34 |  |
Pennsylvania Regulated [Member] | Other [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 15 | 13 | 28 | 26 |  |
Pennsylvania Regulated [Member] | Wholesale - municipal [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 | 0 | 0 |  |
Pennsylvania Regulated [Member] | Wholesale - other [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 | 0 | 0 |  |
Pennsylvania Regulated [Member] | Transmission [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 204 | 199 | 409 | 277 |  |
Kentucky Regulated [Member] |  |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |  |
Operating Revenues | 819 | 778 | 1,803 | 1,738 |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 821 | 774 | 1,810 | 978 |  |
Kentucky Regulated [Member] | Residential [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 326 | 298 | 769 | 370 |  |
Kentucky Regulated [Member] | Commercial [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 245 | 237 | 512 | 150 |  |
Kentucky Regulated [Member] | Industrial [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 157 | 160 | 318 | 13 |  |
Kentucky Regulated [Member] | Other [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 75 | 66 | 172 | 364 |  |
Kentucky Regulated [Member] | Wholesale - municipal [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 5 | 4 | 11 | 0 |  |
Kentucky Regulated [Member] | Wholesale - other [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 13 | 9 | 28 | 0 |  |
Kentucky Regulated [Member] | Transmission [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 | 0 | 81 |  |
Corporate and Other [Member] |  |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |  |
Operating Revenues | 0 | 1 | 1 | 0 |  |
Rhode Island Regulated |  |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |  |
Operating Revenues | 389 | 377 | 938 | 942 |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 391 | 379 | 944 | 1,733 |  |
Rhode Island Regulated | Residential [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 139 | 141 | 400 | 741 |  |
Rhode Island Regulated | Commercial [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 42 | 49 | 120 | 511 |  |
Rhode Island Regulated | Industrial [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 3 | 4 | 8 | 324 |  |
Rhode Island Regulated | Other [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 162 | 149 | 324 | 126 |  |
Rhode Island Regulated | Wholesale - municipal [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 | 0 | 11 |  |
Rhode Island Regulated | Wholesale - other [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 | 0 | 20 |  |
Rhode Island Regulated | Transmission [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 45 | 36 | 92 | 0 |  |
PPL Electric Utilities Corp [Member] |  |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |  |
Operating Revenues | 673 | 667 | 1,443 | 1,558 |  |
Alternative Revenue Programs | (8) | 6 | (11) | 7 |  |
Other Revenue | (3) | (5) | (8) | (7) |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 662 | 668 | 1,424 | 1,558 |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) | (4) | 7 | 24 | 17 |  |
Contract with Customer, Liability | 22 | 35 | 22 | 35 | 29 | 23
Contract with Customer, Liability, Revenue Recognized |  |  | 11 | 7 |  |
PPL Electric Utilities Corp [Member] | Residential [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 332 | 340 | 758 | 968 |  |
PPL Electric Utilities Corp [Member] | Commercial [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 101 | 105 | 207 | 253 |  |
PPL Electric Utilities Corp [Member] | Industrial [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 10 | 11 | 22 | 34 |  |
PPL Electric Utilities Corp [Member] | Other [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 15 | 13 | 28 | 26 |  |
PPL Electric Utilities Corp [Member] | Wholesale - municipal [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 | 0 | 0 |  |
PPL Electric Utilities Corp [Member] | Wholesale - other [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 | 0 | 0 |  |
PPL Electric Utilities Corp [Member] | Transmission [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 204 | 199 | 409 | 277 |  |
Louisville Gas And Electric Co [Member] |  |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |  |
Operating Revenues | 366 | 355 | 842 | 829 |  |
Alternative Revenue Programs | 2 | 0 | 4 | 1 |  |
Other Revenue | (1) | (1) | (2) | (2) |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 367 | 354 | 844 | 828 |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) | 0 | 0 | 1 | 1 |  |
Contract with Customer, Liability | 4 | 6 | 4 | 6 | 6 | 5
Contract with Customer, Liability, Revenue Recognized |  |  | 6 | 5 |  |
Louisville Gas And Electric Co [Member] | Residential [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 163 | 151 | 381 | 392 |  |
Louisville Gas And Electric Co [Member] | Commercial [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 121 | 119 | 259 | 271 |  |
Louisville Gas And Electric Co [Member] | Industrial [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 46 | 47 | 93 | 96 |  |
Louisville Gas And Electric Co [Member] | Other [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 31 | 26 | 83 | 42 |  |
Louisville Gas And Electric Co [Member] | Wholesale - municipal [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 | 0 | 0 |  |
Louisville Gas And Electric Co [Member] | Wholesale - other [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 6 | 11 | 28 | 27 |  |
Louisville Gas And Electric Co [Member] | Transmission [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 | 0 | 0 |  |
Kentucky Utilities Co [Member] |  |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |  |
Operating Revenues | 464 | 435 | 989 | 934 |  |
Alternative Revenue Programs | 1 | (3) | 6 | (3) |  |
Other Revenue | (1) | (1) | (2) | (2) |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 464 | 431 | 993 | 929 |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) | 0 | 1 | 1 | 1 |  |
Contract with Customer, Liability | 5 | 7 | 5 | 7 | $ 7 | $ 6
Contract with Customer, Liability, Revenue Recognized |  |  | 7 | 6 |  |
Kentucky Utilities Co [Member] | Residential [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 163 | 147 | 388 | 349 |  |
Kentucky Utilities Co [Member] | Commercial [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 124 | 117 | 253 | 240 |  |
Kentucky Utilities Co [Member] | Industrial [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 111 | 113 | 225 | 228 |  |
Kentucky Utilities Co [Member] | Other [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 43 | 40 | 89 | 84 |  |
Kentucky Utilities Co [Member] | Wholesale - municipal [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 5 | 4 | 11 | 11 |  |
Kentucky Utilities Co [Member] | Wholesale - other [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | 18 | 10 | 27 | 17 |  |
Kentucky Utilities Co [Member] | Transmission [Member] |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |
Revenues from Contracts with Customers | $ 0 | $ 0 | $ 0 | $ 0 |  |

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