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DISCONTINUED OPERATIONS - Summarized Results of Discontinued Operations (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Income tax expense (benefit) |  |  | $ (48) | $ (59)
Income from discontinued operations | [1] | $ 0 | 44 | 76
FES and FENOC | Discontinued Operations, Disposed of by Means Other than Sale |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Revenues |  | 0 | 0 | 7
Fuel |  | 0 | 0 | (6)
Other operating expenses |  | 0 | 0 | (6)
Pleasants economic interest |  | 0 | 0 | 5
Other expense, net |  | 0 | (4) | 0
Loss from discontinued operations, before tax |  | 0 | (4) | 0
Income tax expense (benefit) |  | 0 | (1) | 0
Loss from discontinued operations, net of tax |  | 0 | (3) | 0
Settlement consideration and services credit |  | 0 | 0 | (1)
Accelerated net pension and OPEB prior service credits |  | 0 | 0 | 18
Gain on disposal of FES and FENOC, before tax |  | 0 | 0 | 17
Income tax benefits, including worthless stock deduction |  | 0 | (47) | (59)
Gain on disposal of FES and FENOC, net of tax |  | 0 | 47 | 76
Income from discontinued operations |  | $ 0 | $ 44 | $ 76
[1] | Net of income tax benefit of $48 million and $59 million in 2021 and 2020, respectively.

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