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Earnings Per Share - Weighted Average Number of Shares (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]        
Weighted-average number of shares - basic (in shares) 417 439 419 442
Common stock equivalents (in shares) 1 4 2 5
Weighted-average number of shares - diluted (in shares) 418 443 421 447