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Disaggregation of Revenue (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers $ 9,170 $ 8,444 $ 8,290
Pennsylvania Regulated [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 3,117 2,842 2,998
Kentucky Regulated [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 3,751 3,582 3,440
Corporate And Other [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers     1
Rhode Island Regulated      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 2,302 2,020 1,851
Residential [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 4,521 4,162 3,747
Residential [Member] | Pennsylvania Regulated [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 1,656 1,502 1,649
Residential [Member] | Kentucky Regulated [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 1,616 1,510 1,458
Residential [Member] | Corporate And Other [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers     0
Residential [Member] | Rhode Island Regulated      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 1,249 1,150 640
Residential [Member] | Rhode Island Regulated | Reclassification, Other      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 534 469  
Commercial [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 2,182 2,039 1,673
Commercial [Member] | Pennsylvania Regulated [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 448 418 444
Commercial [Member] | Kentucky Regulated [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 1,063 1,028 1,001
Commercial [Member] | Corporate And Other [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers     0
Commercial [Member] | Rhode Island Regulated      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 671 593 228
Commercial [Member] | Rhode Island Regulated | Reclassification, Other      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 409 372  
Industrial [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 766 773 712
Industrial [Member] | Pennsylvania Regulated [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 56 47 55
Industrial [Member] | Kentucky Regulated [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 627 635 637
Industrial [Member] | Corporate And Other [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers     0
Industrial [Member] | Rhode Island Regulated      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 83 91 20
Industrial [Member] | Rhode Island Regulated | Reclassification, Other      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 83 88  
Other [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 449 390 1,120
Other [Member] | Pennsylvania Regulated [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 54 57 54
Other [Member] | Kentucky Regulated [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 309 323 272
Other [Member] | Corporate And Other [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers     1
Other [Member] | Rhode Island Regulated      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 86 10 793
Wholesale Municipal [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 25 23 22
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 25 23 22
Wholesale Municipal [Member] | Corporate And Other [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers     0
Wholesale Municipal [Member] | Rhode Island Regulated      
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 111 63 50
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 111 63 50
Wholesale Other [Member] | Corporate And Other [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers     0
Wholesale Other [Member] | Rhode Island Regulated      
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 1,116 994 966
Transmission [Member] | Pennsylvania Regulated [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 903 818 796
Transmission [Member] | Kentucky Regulated [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 0 0 0
Transmission [Member] | Corporate And Other [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers     0
Transmission [Member] | Rhode Island Regulated      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 213 176 170
PPL Electric Utilities Corp [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 3,117 2,842 2,998
PPL Electric Utilities Corp [Member] | Residential [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 1,656 1,502 1,649
PPL Electric Utilities Corp [Member] | Commercial [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 448 418 444
PPL Electric Utilities Corp [Member] | Industrial [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 56 47 55
PPL Electric Utilities Corp [Member] | Other [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 54 57 54
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 903 818 796
Kentucky Utilities Co [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 2,060 1,976 1,875
Kentucky Utilities Co [Member] | Residential [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 807 756 707
Kentucky Utilities Co [Member] | Commercial [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 523 510 484
Kentucky Utilities Co [Member] | Industrial [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 440 447 448
Kentucky Utilities Co [Member] | Other [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 169 176 168
Kentucky Utilities Co [Member] | Wholesale Municipal [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 25 23 22
Kentucky Utilities Co [Member] | Wholesale Other [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 96 64 46
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 1,742 1,657 1,608
LOUISVILLE GAS And ELECTRIC CO [Member] | Residential [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 809 754 751
LOUISVILLE GAS And ELECTRIC CO [Member] | Commercial [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 540 518 517
LOUISVILLE GAS And ELECTRIC CO [Member] | Industrial [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 187 188 189
LOUISVILLE GAS And ELECTRIC CO [Member] | Other [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers 139 147 104
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 67 50 47
LOUISVILLE GAS And ELECTRIC CO [Member] | Transmission [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contracts with Customers $ 0 $ 0 $ 0