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Discontinued Operations - Summarized Results (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Income tax expense | $ 1 |  | $ 39 |  | $ (35) | $ 44
Loss from discontinued operations, net of tax |  |  |  |  | 52 | (39)
Accelerated net pension and OPEB prior service credits |  |  | 0 |  |  | 0
Gain (loss) on Disposal of FES and FENOC, before tax | 3 |  | 10 |  | 17 | (23)
Income (loss) from discontinued operations | 2 | [1] | (29) | [1] | 52 | (64)
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 |  | 31 |  | 7 | 85
Fuel | 0 |  | (20) |  | (6) | (55)
Other operating expenses | 0 |  | (16) |  | (6) | (26)
General taxes | 0 |  | (5) |  | 0 | (9)
Other income (expense) | 0 |  | 10 |  | 5 | 8
Loss from discontinued operations, before tax | 0 |  | 0 |  | 0 | 3
Income tax expense | 0 |  | 14 |  | 0 | 28
Loss from discontinued operations, net of tax | 0 |  | (14) |  | 0 | (25)
Settlement consideration | 3 |  | 10 |  | (1) | (23)
Accelerated net pension and OPEB prior service credits | 0 |  |  |  | 18 |
Income tax expense (benefit) including worthless stock deduction | 1 |  | 25 |  | (35) | 16
Gain (loss) on disposal of FES and FENOC, net of tax | 2 |  | (15) |  | 52 | (39)
Income (loss) from discontinued operations | $ 2 |  | $ (29) |  | $ 52 | $ (64)
[1] | Net of income tax expense of $1 million and $39 million for the three months ended June 30, 2020 and 2019, respectively, and $(35) million and $44 million for the six months ended June 30, 2020 and 2019, respectively.

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