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Earnings Per Share (Narrative) (Details)
3 Months Ended 9 Months Ended
Oct. 29, 2011
Oct. 30, 2010
Oct. 29, 2011
Oct. 30, 2010
Common Stock [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Stock options outstanding, not included in computation of diluted earnings per share 17,500,000 25,400,000 17,500,000 25,400,000
Restricted Stock Units [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Stock options outstanding, not included in computation of diluted earnings per share   827,000   827,000