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Discontinued Operations (Tables) | 12 Months Ended
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Dec. 31, 2018
Discontinued Operations and Disposal Groups [Abstract] |
Schedule of Discontinued Operations | The following table presents the financial results of the Divested Business (in millions):
|  | Years ended December 31
|  | 2018 |  | 2017 |  | 2016
Revenue |  |  |  |  |  |
Total revenue |  | $ | — |  |  | $ | 698 |  |  | $ | 2,218 |
Expenses |  |  |  |  |  |
Total operating expenses |  | 12 |  |  | 656 |  |  | 1,950 |
Operating Income from discontinued operations |  | (12 | ) |  | 42 |  |  | 268 |
Other income |  | — |  |  | 10 |  |  | — |
Income from discontinued operations before income taxes |  | (12 | ) |  | 52 |  |  | 268 |
Income tax expense (benefit) |  | (4 | ) |  | 3 |  |  | 91 |
Net income (loss) from discontinued operations, excluding gain |  | (8 | ) |  | 49 |  |  | 177 |
Gain on sale of discontinued operations, net of tax |  | 82 |  |  | 779 |  |  | — |
Net income from discontinued operations |  | $ | 74 |  |  | $ | 828 |  |  | $ | 177 |

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