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Earnings Per Share - Additional Information (Details) - shares
shares in Millions
3 Months Ended 6 Months Ended
Aug. 04, 2018
Jul. 29, 2017
Aug. 04, 2018
Jul. 29, 2017
Earnings Per Share [Abstract]        
Shares excluded from the computations of weighted-average number of shares - diluted 6 11 6 9