Earnings/(Loss) per Share (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Aug. 03, 2013
Jul. 28, 2012
Aug. 03, 2013
Jul. 28, 2012
Earnings Per Share Abstract        
Net income/(loss) $ (586) $ (147) $ (934) $ (310)
Weighted average common shares outstanding (basic shares) 220.6 219.3 220.2 218.9
Weighted average shares assuming dilution (diluted shares) 220.6 219.3 220.2 218.9
Basic $ (2.66) $ (0.67) $ (4.24) $ (1.42)
Diluted $ (2.66) $ (0.67) $ (4.24) $ (1.42)
Stock options, restricted stock awards and warrant 25.0 25.7 25.0 25.4