v3.25.1
Cover Page
 3 Months Ended
Mar. 31, 2025
shares
Document Information [Line Items]  
Document Type 10-Q
Document Quarterly Report true
Document Period End Date Mar. 31, 2025
Document Transition Report false
Entity File Number 333-21011
Entity Registrant Name FIRSTENERGY CORP.
Entity Incorporation, State or Country Code OH
Entity Tax Identification Number 34-1843785
Entity Address, Address Line One 341 White Pond Drive
Entity Address, City or Town Akron
Entity Address, State or Province OH
Entity Address, Postal Zip Code 44320
City Area Code (800)
Local Phone Number 736-3402
Title of 12(b) Security Common Stock, $0.10 par value
Trading Symbol FE
Security Exchange Name NYSE
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Large Accelerated Filer
Entity Small Business false
Entity Emerging Growth Company false
Entity Shell Company false
Entity Common Stock Shares Outstanding 577,156,244
Entity Central Index Key 0001031296
Current Fiscal Year End Date --12-31
Document Fiscal Year Focus 2025
Document Fiscal Period Focus Q1
Amendment Flag false
JERSEY CENTRAL POWER & LIGHT COMPANY  
Document Information [Line Items]  
Entity File Number 1-3141
Entity Registrant Name JERSEY CENTRAL POWER & LIGHT COMPANY
Entity Incorporation, State or Country Code NJ
Entity Tax Identification Number 21-0485010
Entity Address, Address Line One 300 Madison Avenue
Entity Address, City or Town Morristown
Entity Address, State or Province NJ
Entity Address, Postal Zip Code 07962
City Area Code (800)
Local Phone Number 736-3402
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Non-accelerated Filer
Entity Shell Company false
Entity Common Stock Shares Outstanding 13,628,447