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Summary of Significant Accounting Policies - Share Repurchases (Details) - Common Stock
shares in Millions
12 Months Ended
Feb. 09, 2016
Oct. 29, 2017
$ / shares
shares
Jan. 29, 2013
shares
Shares Repurchases      
Authorized stock split ratio 2    
2013 Program      
Shares Repurchases      
Number of shares authorized to be repurchased (in shares)     10.0
Stock repurchased (in shares)   2.7  
Average price of shares repurchased (in dollars per share) | $ / shares   $ 34.51  
Remaining number of shares authorized to be repurchased (in shares)   10.5