(Loss)/Earnings per Share (Shares excluded from diluted EPS) (Details)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Oct. 29, 2011
Oct. 30, 2010
Oct. 29, 2011
Oct. 30, 2010
(Loss)/Earnings per Share Disclosure        
Stock options and restricted awards 19 11 18 11