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v3.21.2

Revenue from Contracts with Customers (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2022 | Dec. 31, 2020 | Dec. 31, 2019
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |  |  |
Operating Revenues | $ 1,288 | $ 1,263 | $ 2,786 | $ 2,703 |  |  |
Alternative Revenue Programs | 19 | (8) | 43 | (11) |  |  |
Other Revenue | (5) | (5) | (11) | (13) |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 1,302 | 1,250 | 2,818 | 2,679 |  |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) | 0 | 6 | 2 | 12 |  |  |
Contract with Customer, Liability | 31 | 30 | 31 | 30 |  | $ 40 | $ 37
Contract with Customer, Liability, Revenue Recognized |  |  | 24 | 21 |  |  |
Residential [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 567 | 583 | 1,341 | 1,297 |  |  |
Commercial [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 297 | 274 | 610 | 586 |  |  |
Industrial [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 154 | 134 | 306 | 278 |  |  |
Other [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 93 | 83 | 184 | 170 |  |  |
Wholesale - municipal [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 5 | 3 | 11 | 8 |  |  |
Wholesale - other [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 13 | 9 | 33 | 17 |  |  |
Transmission [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 173 | 164 | 333 | 323 |  |  |
PPL Electric [Member] |  |  |  |  |  |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |  |  |
Revenue Reserve for ROE Challenge | 24 |  | 51 |  |  |  |
Pennsylvania Regulated [Member] |  |  |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |  |  |
Operating Revenues | 537 | 554 | 1,142 | 1,162 |  |  |
Kentucky Regulated [Member] |  |  |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |  |  |
Operating Revenues | 741 | 700 | 1,626 | 1,525 |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 731 | 689 | 1,612 | 1,505 |  |  |
Corporate and Other [Member] |  |  |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |  |  |
Operating Revenues | 10 | 9 | 18 | 16 |  |  |
Corporate and Other [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-06-30 |  |  |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |  |  |
Revenue, Remaining Performance Obligation, Amount | 48 |  | 48 |  |  |  |
Corporate and Other [Member] | Forecast [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-06-30 |  |  |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |  |  |
Revenue, Remaining Performance Obligation, Amount |  |  |  |  | $ 42 |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period |  |  |  |  | 12 months |  |
PPL Electric Utilities Corp [Member] |  |  |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |  |  |
Operating Revenues | 537 | 554 | 1,142 | 1,162 |  |  |
Alternative Revenue Programs | 24 | (1) | 46 | (1) |  |  |
Other Revenue | 0 | (1) | 0 | (3) |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 561 | 552 | 1,188 | 1,158 |  |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) | 0 | 5 | 1 | 9 |  |  |
Contract with Customer, Liability | 16 | 16 | 16 | 16 |  | 23 | 21
Contract with Customer, Liability, Revenue Recognized |  |  | 11 | 9 |  |  |
Revenue Reserve for ROE Challenge | 24 |  | 51 |  |  |  |
PPL Electric Utilities Corp [Member] | Residential [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 279 | 290 | 640 | 634 |  |  |
PPL Electric Utilities Corp [Member] | Commercial [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 83 | 74 | 165 | 155 |  |  |
PPL Electric Utilities Corp [Member] | Industrial [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 13 | 12 | 25 | 20 |  |  |
PPL Electric Utilities Corp [Member] | Other [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 13 | 12 | 25 | 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 | 173 | 164 | 333 | 323 |  |  |
Louisville Gas And Electric Co [Member] |  |  |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |  |  |
Operating Revenues | 342 | 322 | 770 | 729 |  |  |
Alternative Revenue Programs | (1) | (1) | (1) | (4) |  |  |
Other Revenue | (2) | (1) | (5) | (4) |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 339 | 320 | 764 | 721 |  |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) | 0 | 0 | 0 | 1 |  |  |
Contract with Customer, Liability | 5 | 4 | 5 | 4 |  | 5 | 5
Contract with Customer, Liability, Revenue Recognized |  |  | 5 | 5 |  |  |
Louisville Gas And Electric Co [Member] | Residential [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 144 | 149 | 349 | 336 |  |  |
Louisville Gas And Electric Co [Member] | Commercial [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 107 | 100 | 228 | 224 |  |  |
Louisville Gas And Electric Co [Member] | Industrial [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 43 | 38 | 89 | 83 |  |  |
Louisville Gas And Electric Co [Member] | Other [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 31 | 28 | 65 | 56 |  |  |
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 | 14 | 5 | 33 | 22 |  |  |
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 | 411 | 388 | 880 | 820 |  |  |
Alternative Revenue Programs | (4) | (6) | (2) | (6) |  |  |
Other Revenue | (3) | (3) | (6) | (6) |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 404 | 379 | 872 | 808 |  |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) | 0 | 1 | 1 | 2 |  |  |
Contract with Customer, Liability | 5 | 5 | 5 | 5 |  | $ 6 | $ 4
Contract with Customer, Liability, Revenue Recognized |  |  | 6 | 4 |  |  |
Kentucky Utilities Co [Member] | Residential [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 144 | 144 | 352 | 327 |  |  |
Kentucky Utilities Co [Member] | Commercial [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 107 | 100 | 217 | 207 |  |  |
Kentucky Utilities Co [Member] | Industrial [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 98 | 84 | 192 | 175 |  |  |
Kentucky Utilities Co [Member] | Other [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 39 | 34 | 76 | 72 |  |  |
Kentucky Utilities Co [Member] | Wholesale - municipal [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 5 | 3 | 11 | 8 |  |  |
Kentucky Utilities Co [Member] | Wholesale - other [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | 11 | 14 | 24 | 19 |  |  |
Kentucky Utilities Co [Member] | Transmission [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |  |  |
Revenues from Contracts with Customers | $ 0 | $ 0 | $ 0 | $ 0 |  |  |

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