Financing Activities (Detail Of Debt Repayments) (Details) - USD ($) $ in Millions |
9 Months Ended | |
|---|---|---|
Oct. 29, 2016 |
Oct. 31, 2015 |
|
| Debt repaid | $ 174 | $ 152 |
| 7.875% Senior Notes Due 2036[Member] | ||
| Extinguishment of debt | 108 | 0 |
| 7.45% Senior Debentures Due 2016 [Member] | ||
| Extinguishment of debt | 59 | 0 |
| 8.125% Senior Debentures Due 2035 [Member] | ||
| Extinguishment of debt | 0 | 76 |
| 7.5% Senior Debentures Due 2015 [Member] | ||
| Extinguishment of debt | 0 | 69 |
| 9.5% Amortizing Debentures due 2021 [Member] | ||
| Extinguishment of debt | 4 | 4 |
| 9.75% Amortizing Debentures Due 2021 [Member] | ||
| Extinguishment of debt | 2 | 2 |
| Capital Lease and Other Long-Term Obligations [Member] | ||
| Extinguishment of debt | $ 1 | $ 1 |