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Earnings Per Share - Weighted Average Number of Shares (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]        
Weighted-average number of shares - basic (in shares) 387 395 388 397
Common stock equivalents (in shares) 3 1 3 1
Weighted-average number of shares - diluted (in shares) 390 396 391 398