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Disaggregation of Revenue (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | $ 5,838 | $ 5,429 | $ 5,541
Pennsylvania Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 2,482 | 2,316 | 2,342
Kentucky Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 3,325 | 3,077 | 3,161
Corporate Segment [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 31 | 36 | 38
Residential [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 2,715 | 2,585 | 2,610
Residential [Member] | Pennsylvania Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 1,299 | 1,238 | 1,288
Residential [Member] | Kentucky Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 1,416 | 1,347 | 1,322
Residential [Member] | Corporate Segment [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
Commercial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 1,278 | 1,185 | 1,257
Commercial [Member] | Pennsylvania Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 350 | 314 | 349
Commercial [Member] | Kentucky Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 928 | 871 | 908
Commercial [Member] | Corporate Segment [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
Industrial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 639 | 582 | 621
Industrial [Member] | Pennsylvania Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 53 | 44 | 59
Industrial [Member] | Kentucky Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 586 | 538 | 562
Industrial [Member] | Corporate Segment [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
Other [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 386 | 347 | 367
Other [Member] | Pennsylvania Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 50 | 50 | 52
Other [Member] | Kentucky Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 305 | 261 | 277
Other [Member] | Corporate Segment [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 31 | 36 | 38
Wholesale Municipal [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 24 | 20 | 43
Wholesale Municipal [Member] | Pennsylvania Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
Wholesale Municipal [Member] | Kentucky Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 24 | 20 | 43
Wholesale Municipal [Member] | Corporate Segment [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
Wholesale Other [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 66 | 40 | 49
Wholesale Other [Member] | Pennsylvania Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
Wholesale Other [Member] | Kentucky Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 66 | 40 | 49
Wholesale Other [Member] | Corporate Segment [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
Transmission [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 730 | 670 | 594
Transmission [Member] | Pennsylvania Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 730 | 670 | 594
Transmission [Member] | Kentucky Regulated [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
Transmission [Member] | Corporate Segment [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
PPL Electric Utilities Corp [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 2,482 | 2,316 | 2,342
PPL Electric Utilities Corp [Member] | Residential [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 1,299 | 1,238 | 1,288
PPL Electric Utilities Corp [Member] | Commercial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 350 | 314 | 349
PPL Electric Utilities Corp [Member] | Industrial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 53 | 44 | 59
PPL Electric Utilities Corp [Member] | Other [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 50 | 50 | 52
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 | 730 | 670 | 594
Kentucky Utilities Co [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 1,814 | 1,676 | 1,714
Kentucky Utilities Co [Member] | Residential [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 705 | 671 | 654
Kentucky Utilities Co [Member] | Commercial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 455 | 427 | 442
Kentucky Utilities Co [Member] | Industrial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 406 | 365 | 382
Kentucky Utilities Co [Member] | Other [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 160 | 147 | 156
Kentucky Utilities Co [Member] | Wholesale Municipal [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 24 | 20 | 43
Kentucky Utilities Co [Member] | Wholesale Other [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 64 | 46 | 37
Kentucky Utilities Co [Member] | Transmission [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
LOUISVILLE GAS And ELECTRIC CO [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 1,558 | 1,441 | 1,481
LOUISVILLE GAS And ELECTRIC CO [Member] | Residential [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 711 | 676 | 668
LOUISVILLE GAS And ELECTRIC CO [Member] | Commercial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 473 | 444 | 466
LOUISVILLE GAS And ELECTRIC CO [Member] | Industrial [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 180 | 173 | 180
LOUISVILLE GAS And ELECTRIC CO [Member] | Other [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 145 | 114 | 121
LOUISVILLE GAS And ELECTRIC CO [Member] | Wholesale Municipal [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 0 | 0 | 0
LOUISVILLE GAS And ELECTRIC CO [Member] | Wholesale Other [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | 49 | 34 | 46
LOUISVILLE GAS And ELECTRIC CO [Member] | Transmission [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from Contracts with Customers | $ 0 | $ 0 | $ 0

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