| Schedule of Debt [Table Text Block] |
| | | | | | | | | | | | | | ($ in millions) | | October 28, 2017 | | October 29, 2016 | | January 28, 2017 | Issue: | | | | | | | 2014 Credit Facility | | $ | — |
| | $ | 162 |
| | $ | — |
| 7.95% Debentures Due 2017 | | — |
| | 220 |
| | 220 |
| 2017 Credit Facility | | 211 |
| | — |
| | — |
| 5.75% Senior Notes Due 2018 (1) | | 190 |
| | 265 |
| | 265 |
| 8.125% Senior Notes Due 2019 (1) | | 175 |
| | 400 |
| | 400 |
| 5.65% Senior Notes Due 2020 (1) | | 400 |
| | 400 |
| | 400 |
| 2016 Term Loan Facility (Matures in 2023) | | 1,635 |
| | 1,677 |
| | 1,667 |
| 5.875% Senior Secured Notes Due 2023 (1) | | 500 |
| | 500 |
| | 500 |
| 7.125% Debentures Due 2023 | | 10 |
| | 10 |
| | 10 |
| 6.9% Notes Due 2026 | | 2 |
| | 2 |
| | 2 |
| 6.375% Senior Notes Due 2036 (1) | | 388 |
| | 388 |
| | 388 |
| 7.4% Debentures Due 2037 | | 313 |
| | 313 |
| | 313 |
| 7.625% Notes Due 2097 | | 500 |
| | 500 |
| | 500 |
| Total debt, excluding unamortized debt issuance costs, capital leases, financing obligation and note payable | | 4,324 |
| | 4,837 |
| | 4,665 |
| Unamortized debt issuance costs | | (53 | ) | | (65 | ) | | (63 | ) | Total debt, excluding capital leases, financing obligation and note payable | | 4,271 |
| | 4,772 |
| | 4,602 |
| Less: current maturities | | 232 |
| | 263 |
| | 263 |
| Total long-term debt, excluding capital leases, financing obligation and note payable | | $ | 4,039 |
| | $ | 4,509 |
| | $ | 4,339 |
|
| | (1) | These debt issuances contain a change of control provision that would obligate us, at the holders’ option, to repurchase the debt at a price of 101%. |
|