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SEGMENT INFORMATION - Narrative (Details) customer in Millions, $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 USD ($) MW | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) site customer MW | Sep. 30, 2023 USD ($) | Dec. 31, 2025 site MW
Segment Reporting Information [Line Items] |  |  |  |  |  |
Number of customers | customer |  |  |  | 6.0 |  |
Total revenues | $ | [1] | $ 3,729 | $ 3,487 | $ 10,296 | $ 9,724 |
FEV | Global Holding |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Investment ownership percentage |  | 33.30% |  | 33.30% |  |
Distribution Segment |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Number of customers | customer |  |  |  | 4.2 |  |
Distribution Segment | Rate Base 2023 |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Total revenues | $ |  |  |  | $ 10,900 |  |
Other Business Operations | FE |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Long-term debt and other long-term obligations | $ |  | $ 6,100 |  | $ 6,100 |  |
Other Business Operations | OVEC |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Plant capacity (in MW's) | MW |  | 67 |  | 67 |  |
Integrated |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Number of customers | customer |  |  |  | 2.0 |  |
Integrated | Rate Base 2023 |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Total revenues | $ |  |  |  | $ 8,700 |  |
Integrated | MP and PE | Solar Generation Project |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Plant capacity (in MW's) | MW |  |  |  | 50 |  |
Number of approved solar sites | site |  |  |  | 5 |  |
Integrated | MP and PE | Solar Generation Project | Forecast |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Plant capacity (in MW's) | MW |  |  |  |  |  | 26
Number of sites expected to be completed | site |  |  |  |  |  | 3
Integrated | MP and PE | Solar Generation Project | West Virginia |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Plant capacity (in MW's) | MW |  | 24 |  | 24 |  |
Regulated Transmission | Rate Base 2023 |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Total revenues | $ |  |  |  | $ 7,700 |  |
Integrated Segment |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Plant capacity (in MW's) | MW |  | 3,604 |  | 3,604 |  |
[1] | Includes excise and gross receipts tax collections of $116 million and $114 million during the three months ended September 30, 2024 and 2023, respectively, and $329 million and $315 million during the nine months ended September 30, 2024 and 2023, respectively.

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