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Earnings Per Share - Additional Information (Details) - shares
shares in Millions
3 Months Ended 6 Months Ended
Aug. 01, 2015
Aug. 02, 2014
Aug. 01, 2015
Aug. 02, 2014
Earnings Per Share [Abstract]        
Shares excluded from the computations of weighted-average number of shares - diluted 3 2 3 2