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Earnings per Share (Details 2) (Stock Options [Member])
In Millions, unless otherwise specified
4 Months Ended
Jan. 19, 2014
Jan. 20, 2013
Stock Options [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 3.9 7.1