v3.26.1
EARNINGS PER SHARE OF COMMON STOCK - Schedule of Reconciles Basic and Diluted Eps Attributable to FE (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Earnings Per Share [Abstract]        
Earnings Attributable to FE $ 288 $ 268 $ 693 $ 628
Share count information:        
Weighted average number of basic shares outstanding (in shares) 578 577 578 577
Assumed exercise of dilutive share-based awards (in shares) 1 1 1 1
Assumed impact of the 2029 Convertible Notes and the 2031 Convertible Notes conversion premium (in shares) 0 0 1 0
Weighted average number of diluted shares outstanding (in shares) 579 578 580 578
EPS Attributable to FE:        
Basic EPS (in dollars per share) $ 0.50 $ 0.46 $ 1.20 $ 1.09
Diluted EPS (in dollars per share) $ 0.50 $ 0.46 $ 1.20 $ 1.09