Long-Term Debt (Debt Issues) (Details) - USD ($)
$ in Millions |
12 Months Ended |
|
|
Feb. 03, 2018 |
Jan. 28, 2017 |
Apr. 30, 2016 |
| Debt Instrument [Line Items] |
|
|
|
|
| Total debt |
|
$ 4,063
|
$ 4,665
|
|
| Unamortized debt issuance costs |
|
(51)
|
(63)
|
|
| Total long-term debt |
|
$ 3,780
|
$ 4,339
|
|
| Weighted-average interest rate at year end |
|
6.10%
|
6.30%
|
|
| Weighted-average maturity (in years) |
|
16 years
|
|
|
| Debt Instrument, Repurchased Face Amount |
|
$ 40
|
|
$ 60
|
| Less: current maturities |
|
(232)
|
$ (263)
|
|
| 7.95% Debentures Due 2017 |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Debt instrument, stated interest rate (percent) |
|
|
7.95%
|
|
| Unsecured Long-term Debt, Noncurrent |
|
$ 0
|
$ 220
|
|
| 5.75% Senior Notes Due 2018 (1) |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Debt instrument, stated interest rate (percent) |
|
5.75%
|
5.75%
|
|
| Unsecured Long-term Debt, Noncurrent |
[1] |
$ 190
|
$ 265
|
|
| 8.125% Senior Notes Due 2019 |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Debt instrument, stated interest rate (percent) |
|
8.125%
|
8.125%
|
|
| Unsecured Long-term Debt, Noncurrent |
|
$ 175
|
$ 400
|
|
| 5.65% Senior Notes Due 2020 (1) |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Debt instrument, stated interest rate (percent) |
|
5.65%
|
5.65%
|
|
| Unsecured Long-term Debt, Noncurrent |
[1] |
$ 360
|
$ 400
|
|
| 2016 Term Loan Facility (Matures in 2023) |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Secured Debt |
|
$ 1,625
|
$ 1,667
|
|
| 5.875% Senior Secured Notes Due 2023 (1) |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Debt instrument, stated interest rate (percent) |
|
5.875%
|
5.875%
|
|
| Secured Debt |
[1] |
$ 500
|
$ 500
|
|
| 7.125% Debentures Due 2023 |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Debt instrument, stated interest rate (percent) |
|
7.125%
|
7.125%
|
|
| Unsecured Long-term Debt, Noncurrent |
|
$ 10
|
$ 10
|
|
| 6.9% Notes Due 2026 |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Debt instrument, stated interest rate (percent) |
|
6.90%
|
6.90%
|
|
| Unsecured Long-term Debt, Noncurrent |
|
$ 2
|
$ 2
|
|
| 6.375% Senior Notes Due 2036 (1) |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Debt instrument, stated interest rate (percent) |
|
6.375%
|
6.375%
|
|
| Unsecured Long-term Debt, Noncurrent |
[1] |
$ 388
|
$ 388
|
|
| 7.4% Debentures Due 2037 |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Debt instrument, stated interest rate (percent) |
|
7.40%
|
7.40%
|
|
| Unsecured Long-term Debt, Noncurrent |
|
$ 313
|
$ 313
|
|
| 7.625% Notes Due 2097 |
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
| Debt instrument, stated interest rate (percent) |
|
7.625%
|
7.625%
|
|
| Unsecured Long-term Debt, Noncurrent |
|
$ 500
|
$ 500
|
|
|
|