VARIABLE INTEREST ENTITIES (Details) $ in Millions |
Jun. 30, 2026
USD ($)
subsidiary
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Dec. 31, 2025
USD ($)
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Feb. 02, 2023 |
Jun. 30, 2013
USD ($)
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|---|---|---|---|---|
| Variable Interest Entity [Line Items] | ||||
| Number of subsidiaries that issued environmental control bonds | subsidiary | 2 | |||
| Long-term pollution control bond | $ 139 | $ 156 | ||
| Restricted cash | $ 128 | 42 | ||
| FET | ||||
| Variable Interest Entity [Line Items] | ||||
| Noncontrolling interest, ownership percentage by noncontrolling owners | 49.90% | |||
| FET | Brookfield | ||||
| Variable Interest Entity [Line Items] | ||||
| Sale of ownership interest by parent | 30.00% | |||
| Phase In Recovery Bonds | ||||
| Variable Interest Entity [Line Items] | ||||
| Long-term debt | $ 150 | 159 | ||
| Ohio Funding Companies | Phase In Recovery Bonds | ||||
| Variable Interest Entity [Line Items] | ||||
| Face amount of debt | $ 445 | |||
| MP, PE and the Ohio Companies | ||||
| Variable Interest Entity [Line Items] | ||||
| Restricted cash | $ 41 | $ 40 | ||
| FE | FET | ||||
| Variable Interest Entity [Line Items] | ||||
| Ownership percentage by parent | 50.10% |
| X | ||||||||||
- Definition Consolidation, Less Than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Sale Of Interest by Parent, Percent No definition available.
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- Definition Number Of Subsidiaries That Issued Environmental Control Bonds No definition available.
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- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Represents the current and noncurrent portions of a debt security issued by a state, certain agencies or authorities, a local government, or development corporation to finance the construction of air- or water-pollution control facilities or sewage or solid waste disposal facilities pursuant to federal law. The bonds are backed by the credit of the beneficiary of the financing rather than the credit of the issuer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. No definition available.
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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. No definition available.
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- Definition Amount of cash restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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