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v3.20.1

Revenue from Contracts with Customers (Details) - USD ($) $ in Millions | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2021 | Dec. 31, 2019 | Dec. 31, 2018
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |
Operating Revenues | $ 2,054 | $ 2,079 |  |  |
Alternative Revenue Programs | (3) | (6) |  |  |
Other Revenue | (10) | (10) |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 2,041 | 2,063 |  |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) | 8 | 9 |  |  |
Contract with Customer, Liability | 42 | 37 |  | $ 44 | $ 42
Contract with Customer, Liability, Revenue Recognized | 23 | 25 |  |  |
Licensed energy suppliers [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 583 | 556 |  |  |
Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 714 | 778 |  |  |
Commercial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 312 | 319 |  |  |
Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 144 | 150 |  |  |
Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 116 | 114 |  |  |
Wholesale - municipal [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 5 | 28 |  |  |
Wholesale - other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 8 | 13 |  |  |
Transmission [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 159 | 105 |  |  |
Pennsylvania Regulated [Member] |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |
Operating Revenues | 608 | 645 |  |  |
United Kingdom Regulated [Member] |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |
Operating Revenues | 614 | 583 |  |  |
Kentucky Regulated [Member] |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |
Operating Revenues | 825 | 845 |  |  |
Corporate and Other [Member] |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |
Operating Revenues | 7 | 6 |  |  |
Corporate and Other [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-03-31 |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |
Revenue, Remaining Performance Obligation, Amount | 32 |  |  |  |
Corporate and Other [Member] | Forecast [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-03-31 |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |
Revenue, Remaining Performance Obligation, Amount |  |  | $ 28 |  |
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 | 608 | 645 |  |  |
Alternative Revenue Programs | 0 | (4) |  |  |
Other Revenue | (2) | (3) |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 606 | 638 |  |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) | 4 | 6 |  |  |
Contract with Customer, Liability | 15 | 14 |  | 21 | 23
Contract with Customer, Liability, Revenue Recognized | 8 | 11 |  |  |
PPL Electric Utilities Corp [Member] | Licensed energy suppliers [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 |  |  |
PPL Electric Utilities Corp [Member] | Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 344 | 407 |  |  |
PPL Electric Utilities Corp [Member] | Commercial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 81 | 95 |  |  |
PPL Electric Utilities Corp [Member] | Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 8 | 17 |  |  |
PPL Electric Utilities Corp [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 14 | 14 |  |  |
PPL Electric Utilities Corp [Member] | Wholesale - municipal [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 |  |  |
PPL Electric Utilities Corp [Member] | Wholesale - other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 |  |  |
PPL Electric Utilities Corp [Member] | Distribution [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 447 | 533 |  |  |
PPL Electric Utilities Corp [Member] | Transmission [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 159 | 105 |  |  |
LG And E And KU Energy LLC [Member] |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |
Operating Revenues | 825 | 845 |  |  |
Alternative Revenue Programs | (3) | (2) |  |  |
Other Revenue | (6) | (4) |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 816 | 839 |  |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) | 2 | 2 |  |  |
Contract with Customer, Liability | 14 | 7 |  | 9 | 9
Contract with Customer, Liability, Revenue Recognized | 9 | 9 |  |  |
LG And E And KU Energy LLC [Member] | Licensed energy suppliers [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 |  |  |
LG And E And KU Energy LLC [Member] | Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 370 | 371 |  |  |
LG And E And KU Energy LLC [Member] | Commercial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 231 | 224 |  |  |
LG And E And KU Energy LLC [Member] | Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 136 | 133 |  |  |
LG And E And KU Energy LLC [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 66 | 70 |  |  |
LG And E And KU Energy LLC [Member] | Wholesale - municipal [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 5 | 28 |  |  |
LG And E And KU Energy LLC [Member] | Wholesale - other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 8 | 13 |  |  |
LG And E And KU Energy LLC [Member] | Transmission [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 |  |  |
Louisville Gas And Electric Co [Member] |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |
Operating Revenues | 407 | 410 |  |  |
Alternative Revenue Programs | (3) | (2) |  |  |
Other Revenue | (3) | (1) |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 401 | 407 |  |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) | 1 | 1 |  |  |
Contract with Customer, Liability | 10 | 4 |  | 5 | 5
Contract with Customer, Liability, Revenue Recognized | 5 | 5 |  |  |
Louisville Gas And Electric Co [Member] | Licensed energy suppliers [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 |  |  |
Louisville Gas And Electric Co [Member] | Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 187 | 189 |  |  |
Louisville Gas And Electric Co [Member] | Commercial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 124 | 121 |  |  |
Louisville Gas And Electric Co [Member] | Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 45 | 44 |  |  |
Louisville Gas And Electric Co [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 28 | 33 |  |  |
Louisville Gas And Electric Co [Member] | Wholesale - municipal [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 |  |  |
Louisville Gas And Electric Co [Member] | Wholesale - other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 17 | 20 |  |  |
Louisville Gas And Electric Co [Member] | Transmission [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 |  |  |
Kentucky Utilities Co [Member] |  |  |  |  |
Reconciliation of Revenue from Contracts with Customers [Abstract] |  |  |  |  |
Operating Revenues | 432 | 450 |  |  |
Alternative Revenue Programs | 0 | 0 |  |  |
Other Revenue | (3) | (3) |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 429 | 447 |  |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |
Accounts Receivable, Credit Loss Expense (Reversal) | 1 | 1 |  |  |
Contract with Customer, Liability | 4 | 3 |  | $ 4 | $ 4
Contract with Customer, Liability, Revenue Recognized | 4 | 4 |  |  |
Kentucky Utilities Co [Member] | Licensed energy suppliers [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 0 | 0 |  |  |
Kentucky Utilities Co [Member] | Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 183 | 182 |  |  |
Kentucky Utilities Co [Member] | Commercial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 107 | 103 |  |  |
Kentucky Utilities Co [Member] | Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 91 | 89 |  |  |
Kentucky Utilities Co [Member] | Other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 38 | 37 |  |  |
Kentucky Utilities Co [Member] | Wholesale - municipal [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 5 | 28 |  |  |
Kentucky Utilities Co [Member] | Wholesale - other [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | 5 | 8 |  |  |
Kentucky Utilities Co [Member] | Transmission [Member] |  |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |  |
Revenues from Contracts with Customers | $ 0 | $ 0 |  |  |

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