v3.26.1
FAIR VALUE MEASUREMENTS - Schedule of Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Liabilities    
Restricted cash $ 128 $ 42
MP, PE and the Ohio Companies    
Liabilities    
Restricted cash 41 40
JCP&L    
Assets    
Other 13 17
Liabilities    
Restricted cash 79 0
Recurring    
Assets    
Derivative assets FTRs 38 21
Equity securities 2 2
Debt securities 286 280
Cash, cash equivalents and restricted cash 191 99
Other 56 56
Total assets 573 458
Liabilities    
Derivative liabilities FTRs (21) (1)
Total liabilities (21) (1)
Net assets 552 457
Level 1 | Recurring    
Assets    
Derivative assets FTRs 0 0
Equity securities 2 2
Debt securities 0 0
Cash, cash equivalents and restricted cash 191 99
Other 0 0
Total assets 193 101
Liabilities    
Derivative liabilities FTRs 0 0
Total liabilities 0 0
Net assets 193 101
Level 2 | Recurring    
Assets    
Derivative assets FTRs 0 0
Equity securities 0 0
Debt securities 286 280
Cash, cash equivalents and restricted cash 0 0
Other 56 56
Total assets 342 336
Liabilities    
Derivative liabilities FTRs 0 0
Total liabilities 0 0
Net assets 342 336
Level 3 | Recurring    
Assets    
Derivative assets FTRs 38 21
Equity securities 0 0
Debt securities 0 0
Cash, cash equivalents and restricted cash 0 0
Other 0 0
Total assets 38 21
Liabilities    
Derivative liabilities FTRs (21) (1)
Total liabilities (21) (1)
Net assets $ 17 $ 20