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Financing Activities (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Feb. 03, 2018 | Oct. 28, 2017 | Oct. 29, 2016 | Oct. 28, 2017 | Oct. 29, 2016
Extinguishment of debt |  |  |  | $ 247 |
Extinguishment of debt cost |  | $ 257 |  | 257 |
Net premiums on early retirement of debt |  | $ 0 | $ 0 | 1 | $ 0
7.45% senior debentures due 2017 |  |  |  |  |
Extinguishment of debt |  |  |  | $ 300 | $ 0
Debt Instrument, Interest Rate, Stated Percentage |  | 7.45% |  | 7.45% |
Subsequent Event [Member] |  |  |  |  |
Extinguishment of debt | $ 400 |  |  |  |
Minimum [Member] | Subsequent Event [Member] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.38% |  |  |  |
Maximum [Member] | Subsequent Event [Member] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 10.25% |  |  |  |

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