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Financing (Detail Of Debt Repayments) (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 15, 2016 | Aug. 17, 2015 | Feb. 03, 2018 | Jul. 29, 2017 | Feb. 03, 2018 | Jan. 28, 2017 | Jan. 30, 2016
Extinguishment of debt |  |  | $ 400 | $ 247 |  |  |
Debt Instrument, Repurchase Amount |  |  | 423 | 257 | $ 423 |  |
Premium on early retirement of debt |  |  | 11 | $ (1) | 10 | $ 0 | $ 0
Debt repaid |  |  |  |  | 954 | 751 | 152
seven point four five senior debentures due 2017 [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  |  |  | 300 | 0 | 0
8.125% Senior Debentures Due 2035 [Member] |  |  |  |  |  |  |
Extinguishment of debt | $ 108 | $ 76 |  |  | 0 | 0 | 76
Debt instrument interest rate, stated percentage |  | 8.125% |  |  |  |  |
9.5% Amortizing Debentures Due 2021 [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  |  |  | 4 | 4 | 4
9.75% Amortizing Debentures Due 2021 [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  |  |  | 2 | 2 | 3
Capital Lease and Other Long-Term Obligations [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  |  |  | 1 | 1 | 0
6.65% senior debentures due 2024 [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  |  |  | 4 | 0 | 0
6.9% senior debentures due 2029 [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  |  |  | 3 | 0 | 0
6.7% senior debentures due 2028 [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  |  |  | 3 | 0 | 0
7.0% senior debentures due 2028 [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  |  |  | 2 | 0 | 0
Six Point Three Seven Five Percent Senior Notes Due Two Thousand Thirty Seven [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  | $ 96 |  | $ 231 | 0 | 0
Debt instrument interest rate, stated percentage |  |  | 6.375% |  | 6.375% |  |
Six Point Nine Percent Senior Debentures Due Two Thousand Thirty Two [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  | $ 147 |  | $ 219 | 0 | 0
Debt instrument interest rate, stated percentage |  |  | 6.90% |  | 6.90% |  |
Six Point Seven Percent Senior Debentures Due Two Thousand Thirty Four [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  | $ 108 |  | $ 136 | 0 | 0
Debt instrument interest rate, stated percentage |  |  | 6.70% |  | 6.70% |  |
Eight Point Seven Five Percent Senior Debentures Due Two Thousand Twenty Nine [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  | $ 43 |  | $ 43 | 0 | 0
Debt instrument interest rate, stated percentage |  |  | 8.75% |  | 8.75% |  |
5.90% Senior Notes Due 2016 [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  |  |  | $ 0 | 577 | 0
7.875% Senior Notes Due 2015 [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  |  |  | 0 | 108 | 0
7.5% Senior Debentures Due 2015 [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  |  |  | 0 | 0 | 69
7.45% Senior Debentures Due 2016 [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  |  |  | 0 | 59 | 0
Seven Point Eight Seven Five Percent Senior Debentures Due Two Thousand Thirty [Member] |  |  |  |  |  |  |
Extinguishment of debt |  |  | $ 6 |  | $ 6 | $ 0 | $ 0
Debt instrument interest rate, stated percentage |  |  | 7.875% |  | 7.875% |  |

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