ORGANIZATION AND BASIS OF PRESENTATION (Policies) |
3 Months Ended |
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Mar. 31, 2026 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Basis of Accounting | FET and its subsidiaries follow GAAP and comply with the related regulations, orders, policies and practices prescribed by the SEC, FERC and the PUCO, PPUC, WVPSC, MDPSC and VSCC. |
| Use of Estimates | The preparation of financial statements in conformity with GAAP requires management to make periodic estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and disclosure of contingent assets and liabilities. Actual results could differ from these estimates. The reported results of operations are not necessarily indicative of results of operations for any future period. |
| Consolidation | FET and its subsidiaries consolidate all majority-owned subsidiaries over which they exercise control and, when applicable, entities for which they have a controlling financial interest. Intercompany transactions and balances are eliminated in consolidation as appropriate and permitted pursuant to GAAP. FET and its subsidiaries consolidate a VIE (MAIT) when it is determined to be a primary beneficiary. Investments in affiliates over which FET and its subsidiaries have the ability to exercise significant influence, but do not have a controlling financial interest, follow the equity method of accounting. Under the equity method, the interest in the entity is reported as an investment in the Consolidated Balance Sheets and the percentage of FET's ownership share of the entity’s earnings is reported in the Consolidated Statements of Income. |
| Reclassifications | Certain prior year amounts have been reclassified to conform to the current year presentation.
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| Segment Information | Segment Information |
| New Accounting Pronouncements | New Accounting Pronouncements Recently Issued Pronouncements - The following new authoritative accounting guidance issued by the FASB has not yet been adopted. Unless otherwise indicated, management is currently assessing the impact such guidance may have on its financial statements and disclosures, as well as the potential to early adopt (where applicable). Management has assessed other FASB issuances of new standards not described below based upon the current expectation that such new standards will not significantly impact FET's financial statements. ASU 2024-03, "Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40)" (Issued in November 2024 and subsequently updated within ASU 2025-01): ASU 2024-03 requires disaggregated disclosure of income statement expenses for public business entities. The ASU does not change the expense captions an entity presents on the face of the income statement; rather, it requires disaggregation of certain expense captions into specified categories in disclosures within the footnotes to the financial statements. ASU 2024-03 is effective for FET beginning with the Annual Report on Form 10-K for the year ended December 31, 2027, with early adoption permitted. The guidance is permitted to be applied prospectively, and comparative disclosures are not required for reporting periods beginning before the effective date. Entities can elect to apply the new standard retrospectively to any or all prior periods presented in the financial statements. ASU 2025-06, "Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software” (Issued in September 2025): ASU 2025-06 amends the existing standard that refers to various stages of a software development project to align better with current software development methods, such as agile programming. Under the new standard, entities will start capitalizing eligible costs when management has authorized and committed to funding the software project, and when it is probable that the project will be completed and the software will be used to perform the function intended. In evaluating whether it is probable the project will be completed; an entity is required to consider whether there is significant uncertainty associated with the development activities of the software. ASU 2025-06 is effective for FET beginning with the financials for the first quarter of 2028, with early adoption permitted. The guidance is permitted to be applied using a prospective, retrospective or modified transition approach. ASU 2025-10, “Government Grants (Topic 832): Accounting for Government Grants Received by Business Entities” (Issued in December 2025): ASU 2025-10 establishes authoritative guidance for the recognition, measurement, presentation, and disclosure of government grants received by business entities. ASU 2025-10 requires that a government grant be recognized when it is probable that the entity will comply with the conditions of the grant and that the grant will be received. It permits two approaches for asset related grants either the cost reduction method (reduce the carrying amount of the asset) or the deferred income method (recognize income over the useful life of the asset). Income-related grants are recognized systematically in income as the related costs are incurred. ASU 2025-10 is effective for FET beginning with financials for the first quarter of 2029, with early adoption permitted. The guidance is permitted to be applied using a modified prospective, modified retrospective or full retrospective approach.
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| Long-Term Debt and Other Long-Term Obligations | LONG-TERM DEBT AND OTHER LONG-TERM OBLIGATIONS All borrowings with initial maturities of less than one year are defined as short-term financial instruments under GAAP and are reported as “Short-term borrowings” on the Consolidated Balance Sheets at cost. Since these borrowings are short-term in nature, FET believes that their costs approximate their fair market value.
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