v3.26.1
REVENUE - Schedule of Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Disaggregation of Revenue [Line Items]        
Total revenues [1] $ 3,678 $ 3,380 $ 7,880 $ 7,145
JCP&L        
Disaggregation of Revenue [Line Items]        
Total revenues 659 592 1,325 1,158
Operating Segments        
Disaggregation of Revenue [Line Items]        
Total revenues 3,692 3,392 7,901 7,168
Operating Segments | Distribution        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 1,697 1,655 3,665 3,568
Total revenues 1,714 1,675 3,704 3,611
Operating Segments | Distribution | JCP&L        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 658 591 1,310 1,156
Total revenues 659 592 1,325 1,158
Operating Segments | Distribution | Wholesale        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 5 3 9 4
Operating Segments | Distribution | Wholesale | JCP&L        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 0 0 2 1
Operating Segments | Distribution | Transmission | JCP&L        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 91 63 162 124
Operating Segments | Distribution | Other revenue from contracts with customers        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 18 20 36 37
Operating Segments | Distribution | Other revenue from contracts with customers | JCP&L        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 3 4 6 7
Operating Segments | Distribution | Other revenue unrelated to contracts with customers        
Disaggregation of Revenue [Line Items]        
Total revenues 17 20 39 43
Operating Segments | Distribution | Other revenue unrelated to contracts with customers | JCP&L        
Disaggregation of Revenue [Line Items]        
Total revenues 1 1 2 2
Operating Segments | Integrated        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 1,389 1,259 2,918 2,593
Total revenues 1,434 1,261 3,137 2,610
Operating Segments | Integrated | Wholesale        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 125 78 237 125
Operating Segments | Integrated | Transmission        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 149 111 268 211
Operating Segments | Integrated | Other revenue from contracts with customers        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 2 4 2 5
Operating Segments | Integrated | Other revenue unrelated to contracts with customers        
Disaggregation of Revenue [Line Items]        
Total revenues 45 2 206 17
Operating Segments | Stand-Alone Transmission        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 537 451 1,046 937
Total revenues 544 456 1,060 947
Operating Segments | Stand-Alone Transmission | Other revenue unrelated to contracts with customers        
Disaggregation of Revenue [Line Items]        
Total revenues 7 5 14 10
Operating Segments | Residential | Distribution        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 1,138 1,043 2,535 2,352
Operating Segments | Residential | Distribution | JCP&L        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 378 341 759 657
Operating Segments | Residential | Integrated        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 637 598 1,432 1,306
Operating Segments | Commercial | Distribution        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 370 409 772 824
Operating Segments | Commercial | Distribution | JCP&L        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 164 161 334 322
Operating Segments | Commercial | Integrated        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 317 307 657 625
Operating Segments | Industrial | Distribution        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 166 180 313 351
Operating Segments | Industrial | Distribution | JCP&L        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 22 22 47 45
Operating Segments | Industrial | Integrated        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 159 161 322 321
Operating Segments | ARP | Integrated | Alternative Revenue Program        
Disaggregation of Revenue [Line Items]        
Total revenues 0 0 13 0
Operating Segments | ARP | Integrated | Alternative Revenue Program | JCP&L        
Disaggregation of Revenue [Line Items]        
Total revenues 0 0 13 0
Operating Segments | ATSI | Stand-Alone Transmission        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 295 256 577 518
Operating Segments | TrAIL | Stand-Alone Transmission        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 63 61 128 131
Operating Segments | MAIT | Stand-Alone Transmission        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 149 113 287 244
Operating Segments | KATCo | Stand-Alone Transmission        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 30 21 54 44
Corporate/Other and Reconciling Adjustments        
Disaggregation of Revenue [Line Items]        
Total revenues (14) (12) (21) (23)
Corporate/Other and Reconciling Adjustments | Wholesale        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 4 4 14 8
Corporate/Other and Reconciling Adjustments | Eliminations and reconciling adjustments        
Disaggregation of Revenue [Line Items]        
Total revenues $ (18) $ (16) $ (35) $ (31)
[1] Includes excise and gross receipts tax collections of $105 million and $100 million during the three months ended June 30, 2026, and 2025, respectively, and $238 million and $223 million during the six months ended June 30, 2026, and 2025, respectively.