v3.26.1
INCOME TAXES - Narrative (Details)
$ in Millions
Jun. 30, 2026
USD ($)
Income Tax Disclosure [Abstract]
Corporate AMT credit carryforwards
$ 18
X
- Definition
Deferred Tax Assets, Corporate AMT Credit Carryforwards
+ References
No definition available.
+ Details
Name:
fe_DeferredTaxAssetsCorporateAMTCreditCarryforwards
Namespace Prefix:
fe_
Data Type:
xbrli:monetaryItemType
Balance Type:
debit
Period Type:
instant
X
- References
No definition available.
+ Details
Name:
us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration