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Disaggregation of Revenue (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | $ 7,556 | $ 7,701 | $ 7,779
Licensed energy supplier [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 1,990 | 2,032 | 2,127
Residential [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 2,585 | 2,610 | 2,704
Commercial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 1,185 | 1,257 | 1,233
Industrial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 582 | 621 | 624
Other [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 484 | 495 | 489
Wholesale Municipal [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 20 | 43 | 118
Wholesale Other [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 40 | 49 | 79
Transmission [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 670 | 594 | 405
PPL Electric Utilities Corp [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 2,316 | 2,342 | 2,259
PPL Electric Utilities Corp [Member] | Licensed energy supplier [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
PPL Electric Utilities Corp [Member] | Residential [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 1,238 | 1,288 | 1,379
PPL Electric Utilities Corp [Member] | Commercial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 314 | 349 | 368
PPL Electric Utilities Corp [Member] | Industrial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 44 | 59 | 54
PPL Electric Utilities Corp [Member] | Other [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 50 | 52 | 53
PPL Electric Utilities Corp [Member] | Wholesale Municipal [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
PPL Electric Utilities Corp [Member] | Wholesale Other [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
PPL Electric Utilities Corp [Member] | Transmission [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 670 | 594 | 405
LG And E And KU Energy LLC [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 3,077 | 3,161 | 3,235
LG And E And KU Energy LLC [Member] | Licensed energy supplier [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
LG And E And KU Energy LLC [Member] | Residential [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 1,347 | 1,322 | 1,325
LG And E And KU Energy LLC [Member] | Commercial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 871 | 908 | 865
LG And E And KU Energy LLC [Member] | Industrial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 538 | 562 | 570
LG And E And KU Energy LLC [Member] | Other [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 261 | 277 | 278
LG And E And KU Energy LLC [Member] | Wholesale Municipal [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 20 | 43 | 118
LG And E And KU Energy LLC [Member] | Wholesale Other [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 40 | 49 | 79
LG And E And KU Energy LLC [Member] | Transmission [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
Kentucky Utilities Co [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 1,676 | 1,714 | 1,774
Kentucky Utilities Co [Member] | Licensed energy supplier [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
Kentucky Utilities Co [Member] | Residential [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 671 | 654 | 659
Kentucky Utilities Co [Member] | Commercial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 427 | 442 | 410
Kentucky Utilities Co [Member] | Industrial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 365 | 382 | 390
Kentucky Utilities Co [Member] | Other [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 147 | 156 | 149
Kentucky Utilities Co [Member] | Wholesale Municipal [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 20 | 43 | 118
Kentucky Utilities Co [Member] | Wholesale Other [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 46 | 37 | 48
Kentucky Utilities Co [Member] | Transmission [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | $ 0 | $ 0 | $ 0

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