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Revenue from Contracts with Customers (Details) $ in Millions | 7 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) Days | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Revenue from contracts with customers [Line Items] |  |  |  |  |
Operating Revenues |  | $ 7,902 | $ 5,783 | $ 5,474 |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |
Alternative Revenue Programs |  | (92) | 77 | (24) |
Other Revenue |  | (24) | (22) | (21) |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 7,786 | 5,838 | 5,429 |
Credit loss from contract with customer [Abstract] |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) |  | 70 | 22 | 25 |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |
Contract with Customer, Liability | $ 34 | 34 | 42 | 40 | $ 37
Contract with Customer, Liability, Revenue Recognized |  | $ 25 | 24 | 22 |
PPL Electric [Member] |  |  |  |  |
Revenue from contracts with customers [Line Items] |  |  |  |  |
Number Of Days Due From Invoice Date | Days |  | 21 |  |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |
Amortization of Revenue Reserve for ROE Challenge |  | $ 74 |  |  |
KU [Member] |  |  |  |  |
Revenue from contracts with customers [Line Items] |  |  |  |  |
Number Of Days Due From Invoice Date | Days |  | 22 |  |  |
LGE [Member] |  |  |  |  |
Revenue from contracts with customers [Line Items] |  |  |  |  |
Number Of Days Due From Invoice Date | Days |  | 22 |  |  |
Rhode Island Energy |  |  |  |  |
Revenue from contracts with customers [Line Items] |  |  |  |  |
Operating Revenues | 1,038 |  |  |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |
Accounts Receivable Forgiven, AR Reserve |  | $ 23 |  |  |
Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 3,583 | 2,715 | 2,585 |
Commercial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 1,660 | 1,278 | 1,185 |
Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 756 | 639 | 582 |
Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 878 | 386 | 347 |
Wholesale Municipal [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 28 | 24 | 20 |
Wholesale Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 97 | 66 | 40 |
Transmission [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 784 | 730 | 670 |
Pennsylvania Regulated [Member] |  |  |  |  |
Revenue from contracts with customers [Line Items] |  |  |  |  |
Operating Revenues |  | 3,030 | 2,402 | 2,330 |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 2,960 | 2,482 | 2,316 |
Pennsylvania Regulated [Member] | Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 1,647 | 1,299 | 1,238 |
Pennsylvania Regulated [Member] | Commercial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 491 | 350 | 314 |
Pennsylvania Regulated [Member] | Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 85 | 53 | 44 |
Pennsylvania Regulated [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 54 | 50 | 50 |
Pennsylvania Regulated [Member] | Wholesale Municipal [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 0 | 0 | 0 |
Pennsylvania Regulated [Member] | Wholesale Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 0 | 0 | 0 |
Pennsylvania Regulated [Member] | Transmission [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 683 | 730 | 670 |
Kentucky Regulated [Member] |  |  |  |  |
Revenue from contracts with customers [Line Items] |  |  |  |  |
Operating Revenues |  | 3,811 | 3,348 | 3,106 |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 3,815 | 3,325 | 3,077 |
Kentucky Regulated [Member] | Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 1,637 | 1,416 | 1,347 |
Kentucky Regulated [Member] | Commercial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 1,068 | 928 | 871 |
Kentucky Regulated [Member] | Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 662 | 586 | 538 |
Kentucky Regulated [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 323 | 305 | 261 |
Kentucky Regulated [Member] | Wholesale Municipal [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 28 | 24 | 20 |
Kentucky Regulated [Member] | Wholesale Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 97 | 66 | 40 |
Kentucky Regulated [Member] | Transmission [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 0 | 0 | 0 |
Corporate And Other [Member] |  |  |  |  |
Revenue from contracts with customers [Line Items] |  |  |  |  |
Operating Revenues |  | 23 | 33 | 38 |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 23 | 31 | 36 |
Corporate And Other [Member] | Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 0 | 0 | 0 |
Corporate And Other [Member] | Commercial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 0 | 0 | 0 |
Corporate And Other [Member] | Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 0 | 0 | 0 |
Corporate And Other [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 23 | 31 | 36 |
Corporate And Other [Member] | Wholesale Municipal [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 0 | 0 | 0 |
Corporate And Other [Member] | Wholesale Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 0 | 0 | 0 |
Corporate And Other [Member] | Transmission [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 0 | 0 | 0 |
Rhode Island Regulated |  |  |  |  |
Revenue from contracts with customers [Line Items] |  |  |  |  |
Operating Revenues |  | 1,038 | 0 | 0 |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 988 | 0 | 0 |
Rhode Island Regulated | Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 299 | 0 | 0 |
Rhode Island Regulated | Commercial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 101 | 0 | 0 |
Rhode Island Regulated | Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 9 | 0 | 0 |
Rhode Island Regulated | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 478 | 0 | 0 |
Rhode Island Regulated | Wholesale Municipal [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 0 | 0 | 0 |
Rhode Island Regulated | Wholesale Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 0 | 0 | 0 |
Rhode Island Regulated | Transmission [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 101 | 0 | 0 |
PPL Electric Utilities Corp [Member] |  |  |  |  |
Revenue from contracts with customers [Line Items] |  |  |  |  |
Operating Revenues |  | $ 3,030 | 2,402 | 2,331 |
Number Of Days Due From Invoice Date | Days |  | 21 |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |
Alternative Revenue Programs |  | $ (56) | 83 | (12) |
Other Revenue |  | (14) | (3) | (3) |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 2,960 | 2,482 | 2,316 |
Credit loss from contract with customer [Abstract] |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) |  | 21 | 10 | 17 |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |
Contract with Customer, Liability | 23 | 23 | 25 | 23 | 21
Contract with Customer, Liability, Revenue Recognized |  | 12 | 11 | 9 |
Revenue Reserve for ROE Challenge |  |  | 78 |  |
Amortization of Revenue Reserve for ROE Challenge |  | 74 |  |  |
PPL Electric Utilities Corp [Member] | Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 1,647 | 1,299 | 1,238 |
PPL Electric Utilities Corp [Member] | Commercial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 491 | 350 | 314 |
PPL Electric Utilities Corp [Member] | Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 85 | 53 | 44 |
PPL Electric Utilities Corp [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 54 | 50 | 50 |
PPL Electric Utilities Corp [Member] | Wholesale Municipal [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 0 | 0 | 0 |
PPL Electric Utilities Corp [Member] | Wholesale Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 0 | 0 | 0 |
PPL Electric Utilities Corp [Member] | Transmission [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 683 | 730 | 670 |
Louisville Gas And Electric Co [Member] |  |  |  |  |
Revenue from contracts with customers [Line Items] |  |  |  |  |
Operating Revenues |  | $ 1,798 | 1,569 | 1,456 |
Number Of Days Due From Invoice Date | Days |  | 22 |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |
Alternative Revenue Programs |  | $ 9 | (3) | (8) |
Other Revenue |  | (6) | (8) | (7) |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 1,801 | 1,558 | 1,441 |
Credit loss from contract with customer [Abstract] |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) |  | 6 | 4 | 4 |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |
Contract with Customer, Liability | 5 | 5 | 6 | 5 | 5
Contract with Customer, Liability, Revenue Recognized |  | 6 | 5 | 5 |
Louisville Gas And Electric Co [Member] | Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 835 | 711 | 676 |
Louisville Gas And Electric Co [Member] | Commercial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 551 | 473 | 444 |
Louisville Gas And Electric Co [Member] | Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 199 | 180 | 173 |
Louisville Gas And Electric Co [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 141 | 145 | 114 |
Louisville Gas And Electric Co [Member] | Wholesale Municipal [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 0 | 0 | 0 |
Louisville Gas And Electric Co [Member] | Wholesale Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 75 | 49 | 34 |
Louisville Gas And Electric Co [Member] | Transmission [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 0 | 0 | 0 |
Kentucky Utilities Co [Member] |  |  |  |  |
Revenue from contracts with customers [Line Items] |  |  |  |  |
Operating Revenues |  | $ 2,074 | 1,826 | 1,690 |
Number Of Days Due From Invoice Date | Days |  | 22 |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |
Alternative Revenue Programs |  | $ 5 | (3) | (4) |
Other Revenue |  | (4) | (9) | (10) |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 2,075 | 1,814 | 1,676 |
Credit loss from contract with customer [Abstract] |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) |  | 6 | 8 | 4 |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |
Contract with Customer, Liability | $ 6 | 6 | 6 | 6 | $ 4
Contract with Customer, Liability, Revenue Recognized |  | 6 | 6 | 4 |
Kentucky Utilities Co [Member] | Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 802 | 705 | 671 |
Kentucky Utilities Co [Member] | Commercial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 517 | 455 | 427 |
Kentucky Utilities Co [Member] | Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 463 | 406 | 365 |
Kentucky Utilities Co [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 182 | 160 | 147 |
Kentucky Utilities Co [Member] | Wholesale Municipal [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 28 | 24 | 20 |
Kentucky Utilities Co [Member] | Wholesale Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | 83 | 64 | 46 |
Kentucky Utilities Co [Member] | Transmission [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenue from Contracts with Customers |  | $ 0 | $ 0 | $ 0 |

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