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Discontinued Operations Discontinued Operations (Tables) | 3 Months Ended
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Apr. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures | The aggregate financial results of discontinued operations were as follows ($ in millions):
| Three Months Ended
| April 30, 2016 |  | May 2, 2015
Revenue | $ | — |  |  | $ | 212 |
Loss from discontinued operations before income tax benefit | — |  |  | (10 | )
Income tax benefit | 3 |  |  | 3 |
Gain on sale of discontinued operations | — |  |  | 99 |
Net gain from discontinued operations | $ | 3 |  |  | $ | 92 |

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