v3.25.1
REVENUE - Schedule of Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Disaggregation of Revenue [Line Items]    
Total revenues [1] $ 3,765 $ 3,287
JERSEY CENTRAL POWER & LIGHT COMPANY    
Disaggregation of Revenue [Line Items]    
Total revenues 566 466
Operating Segments    
Disaggregation of Revenue [Line Items]    
Total revenues 3,776 3,300
Operating Segments | JERSEY CENTRAL POWER & LIGHT COMPANY    
Disaggregation of Revenue [Line Items]    
Total revenues 609 504
Operating Segments | Distribution    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 1,913 1,746
Total revenues 1,936 1,767
Operating Segments | Distribution | JERSEY CENTRAL POWER & LIGHT COMPANY    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 547 451
Total revenues 548 452
Operating Segments | Distribution | Wholesale    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 1 1
Operating Segments | Distribution | Wholesale | JERSEY CENTRAL POWER & LIGHT COMPANY    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 1 2
Operating Segments | Distribution | Other revenue from contracts with customers    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 17 21
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 5
Operating Segments | Distribution | Other revenue unrelated to contracts with customers    
Disaggregation of Revenue [Line Items]    
Total revenues 23 21
Operating Segments | Distribution | Other revenue unrelated to contracts with customers | JERSEY CENTRAL POWER & LIGHT COMPANY    
Disaggregation of Revenue [Line Items]    
Total revenues 1 1
Operating Segments | Integrated    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 1,334 1,087
Total revenues 1,349 1,095
Operating Segments | Integrated | Wholesale    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 47 30
Operating Segments | Integrated | Transmission    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 100 81
Operating Segments | Integrated | Other revenue from contracts with customers    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 1 5
Operating Segments | Integrated | Other revenue unrelated to contracts with customers    
Disaggregation of Revenue [Line Items]    
Total revenues 15 8
Operating Segments | Stand-Alone Transmission    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 486 434
Total revenues 491 438
Operating Segments | Stand-Alone Transmission | Other revenue unrelated to contracts with customers    
Disaggregation of Revenue [Line Items]    
Total revenues 5 4
Operating Segments | Transmission Segment | JERSEY CENTRAL POWER & LIGHT COMPANY    
Disaggregation of Revenue [Line Items]    
Total revenues 61 52
Operating Segments | Residential | Distribution    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 1,309 1,184
Operating Segments | Residential | Distribution | JERSEY CENTRAL POWER & LIGHT COMPANY    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 343 286
Operating Segments | Residential | Integrated    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 708 574
Operating Segments | Commercial | Distribution    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 415 374
Operating Segments | Commercial | Distribution | JERSEY CENTRAL POWER & LIGHT COMPANY    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 175 137
Operating Segments | Commercial | Integrated    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 318 252
Operating Segments | Industrial | Distribution    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 152 146
Operating Segments | Industrial | Distribution | JERSEY CENTRAL POWER & LIGHT COMPANY    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 20 17
Operating Segments | Industrial | Integrated    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 151 138
Operating Segments | Other | Distribution    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 19 20
Operating Segments | Other | Integrated    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 9 7
Operating Segments | Street lighting | Distribution | JERSEY CENTRAL POWER & LIGHT COMPANY    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 5 4
Operating Segments | ATSI | Stand-Alone Transmission    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 262 243
Operating Segments | TrAIL | Stand-Alone Transmission    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 70 67
Operating Segments | MAIT | Stand-Alone Transmission    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 131 104
Operating Segments | KATCo | Stand-Alone Transmission    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 23 20
Corporate/Other and Reconciling Adjustments    
Disaggregation of Revenue [Line Items]    
Total revenues (11) (13)
Corporate/Other and Reconciling Adjustments | Wholesale    
Disaggregation of Revenue [Line Items]    
Total revenues from contracts with customers 4 3
Corporate/Other and Reconciling Adjustments | Eliminations and reconciling adjustments    
Disaggregation of Revenue [Line Items]    
Total revenues (15) (16)
Reconciling Adjustments    
Disaggregation of Revenue [Line Items]    
Total revenues (15) (16)
Reconciling Adjustments | JERSEY CENTRAL POWER & LIGHT COMPANY    
Disaggregation of Revenue [Line Items]    
Total revenues $ (43) $ (38)
[1] Includes excise and gross receipts tax collections of $123 million and $115 million during the three months ended March 31, 2025 and 2024, respectively.