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REVENUE - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | [1] | $ 4,148 | $ 3,729 | $ 11,293 | $ 10,296
JERSEY CENTRAL POWER & LIGHT COMPANY |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | 864 | 765 | 2,022 | 1,788
Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | 4,161 | 3,744 | 11,329 | 10,338
Operating Segments | JERSEY CENTRAL POWER & LIGHT COMPANY |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | 908 | 804 | 2,153 | 1,903
Operating Segments | Distribution |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 2,000 | 1,798 | 5,568 | 5,173
Total revenues |  | 2,020 | 1,817 | 5,631 | 5,232
Operating Segments | Distribution | JERSEY CENTRAL POWER & LIGHT COMPANY |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 840 | 746 | 1,959 | 1,726
Total revenues |  | 841 | 747 | 1,962 | 1,728
Operating Segments | Distribution | Wholesale |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 6 | 2 | 10 | 4
Operating Segments | Distribution | Wholesale | JERSEY CENTRAL POWER & LIGHT COMPANY |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 2 | 2 | 3 | 4
Operating Segments | Distribution | Other revenue from contracts with customers |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 23 | 23 | 60 | 63
Operating Segments | Distribution | Other revenue from contracts with customers | JERSEY CENTRAL POWER & LIGHT COMPANY |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 3 | 4 | 10 | 14
Operating Segments | Distribution | Other revenue unrelated to contracts with customers |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | 20 | 19 | 63 | 59
Operating Segments | Distribution | Other revenue unrelated to contracts with customers | JERSEY CENTRAL POWER & LIGHT COMPANY |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | 1 | 1 | 3 | 2
Operating Segments | Integrated |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 1,642 | 1,437 | 4,235 | 3,694
Total revenues |  | 1,653 | 1,452 | 4,263 | 3,725
Operating Segments | Integrated | Wholesale |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 129 | 50 | 254 | 118
Operating Segments | Integrated | Transmission |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 109 | 86 | 320 | 283
Operating Segments | Integrated | Other revenue from contracts with customers |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 2 | 5 | 7 | 18
Operating Segments | Integrated | Other revenue unrelated to contracts with customers |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | 11 | 15 | 28 | 31
Operating Segments | Stand-Alone Transmission |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 483 | 470 | 1,420 | 1,367
Total revenues |  | 488 | 475 | 1,435 | 1,381
Operating Segments | Stand-Alone Transmission | Other revenue unrelated to contracts with customers |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | 5 | 5 | 15 | 14
Operating Segments | Transmission Segment | JERSEY CENTRAL POWER & LIGHT COMPANY |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | 67 | 57 | 191 | 175
Operating Segments | Residential | Distribution |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 1,333 | 1,222 | 3,685 | 3,460
Operating Segments | Residential | Distribution | JERSEY CENTRAL POWER & LIGHT COMPANY |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 606 | 533 | 1,318 | 1,168
Operating Segments | Residential | Integrated |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 880 | 802 | 2,186 | 1,954
Operating Segments | Commercial | Distribution |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 450 | 395 | 1,274 | 1,153
Operating Segments | Commercial | Distribution | JERSEY CENTRAL POWER & LIGHT COMPANY |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 204 | 183 | 554 | 473
Operating Segments | Commercial | Integrated |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 356 | 335 | 981 | 863
Operating Segments | Industrial | Distribution |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 170 | 138 | 484 | 437
Operating Segments | Industrial | Distribution | JERSEY CENTRAL POWER & LIGHT COMPANY |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 19 | 18 | 57 | 52
Operating Segments | Industrial | Integrated |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 158 | 151 | 461 | 436
Operating Segments | Other | Distribution |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 18 | 18 | 55 | 56
Operating Segments | Other | Distribution | JERSEY CENTRAL POWER & LIGHT COMPANY |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 6 | 6 | 17 | 15
Operating Segments | Other | Integrated |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 8 | 8 | 26 | 22
Operating Segments | ATSI | Stand-Alone Transmission |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 273 | 262 | 791 | 766
Operating Segments | TrAIL | Stand-Alone Transmission |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 66 | 68 | 197 | 206
Operating Segments | MAIT | Stand-Alone Transmission |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 121 | 116 | 365 | 330
Operating Segments | KATCo | Stand-Alone Transmission |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 23 | 24 | 67 | 67
Operating Segments | Other | Stand-Alone Transmission |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 0 | 0 | 0 | (2)
Corporate/Other and Reconciling Adjustments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | (13) | (15) | (36) | (42)
Corporate/Other and Reconciling Adjustments | Wholesale |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 4 | 2 | 12 | 6
Corporate/Other and Reconciling Adjustments | Eliminations and reconciling adjustments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | (17) | (17) | (48) | (48)
Reconciling Adjustments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | (17) | (17) | (48) | (48)
Reconciling Adjustments | JERSEY CENTRAL POWER & LIGHT COMPANY |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | $ (44) | $ (39) | $ (131) | $ (115)
[1] | Includes excise and gross receipts tax collections of $126 million and $116 million during the three months ended September 30, 2025 and 2024, respectively, and $349 million and $329 million during the nine months ended September 30, 2025 and 2024, respectively.

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