v3.26.1
Investments and Fair Value Measurements - Schedule of Net Assets (Details) - EBP 002 - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) $ 3,851,036,292 $ 3,519,948,469
Level 1    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 1,049,331,808 1,043,958,219
Level 2    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 2,801,704,484 2,475,990,250
Cash and Cash Equivalents    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5)   15,455
Cash and Cash Equivalents | Level 1    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5)   0
Cash and Cash Equivalents | Level 2    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5)   15,455
Common Collective Trusts    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 2,559,288,271 2,257,682,707
Common Collective Trusts | Level 1    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 0 0
Common Collective Trusts | Level 2    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 2,559,288,271 2,257,682,707
Total FE Common Stock Fund    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 458,084,933 416,564,219
Total FE Common Stock Fund | Level 1    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 456,541,538 415,883,749
Total FE Common Stock Fund | Level 2    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 1,543,395 680,470
FE Common Stock    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 456,541,538 415,883,749
FE Common Stock | Level 1    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 456,541,538 415,883,749
FE Common Stock | Level 2    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 0 0
Cash and Cash Equivalents    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 1,543,395 680,470
Cash and Cash Equivalents | Level 1    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 0 0
Cash and Cash Equivalents | Level 2    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 1,543,395 680,470
Registered Investment Companies    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 593,820,838 631,045,064
Registered Investment Companies | Level 1    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 592,790,270 628,074,470
Registered Investment Companies | Level 2    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 1,030,568 2,970,594
Self-Managed Brokerage Accounts    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 239,842,250 214,641,024
Self-Managed Brokerage Accounts | Level 1    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) 0 0
Self-Managed Brokerage Accounts | Level 2    
EBP, Master Trust [Line Items]    
Investments, at fair value (see Note 5) $ 239,842,250 $ 214,641,024