Earnings/(Loss) per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Oct. 28, 2017 |
Oct. 29, 2016 |
Oct. 28, 2017 |
Oct. 29, 2016 |
|
| Earnings Per Share [Abstract] | ||||
| Net income/(loss) | $ (128) | $ (67) | $ (370) | $ (191) |
| Weighted average common shares outstanding (basic shares) | 311.6 | 308.3 | 310.6 | 307.8 |
| Weighted average shares assuming dilution (diluted shares) | 311.6 | 308.3 | 310.6 | 307.8 |
| Basic (in dollars per share) | $ (0.41) | $ (0.22) | $ (1.19) | $ (0.62) |
| Diluted (in dollars per share) | $ (0.41) | $ (0.22) | $ (1.19) | $ (0.62) |
| Stock options, restricted stock awards and warrant | 32.1 | 32.9 | 32.9 | 33.7 |