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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
$ in Thousands, shares in Millions
 3 Months Ended
Apr. 30, 2016
May. 02, 2015
Jan. 30, 2016
Jan. 31, 2015
Summary Of Significant Accounting Policies [Line Items]        
Share-based compensation $ 24,959 $ 21,150    
Options to purchase common stock exercised 2.3      
Options outstanding to purchase common stock 26.3      
Unrecognized compensation cost related to nonvested share-based compensation arrangements $ 147,500      
Highly liquid investments maximum maturity days 90 days      
Cash and cash equivalents $ 1,944,155 2,259,965 $ 2,095,473 $ 2,493,775
In-transit inventory accrual $ 544,000 534,600 690,300  
Rent expense recorded prior to minimum number of days before opening of store, in days 30 days      
Rent expense recorded prior to maximum number of days before opening of store, in days 60 days      
Other assets $ 240,759 214,486 222,669  
Long-term debt 1,615,477 1,613,581 1,615,003  
Non-current deferred income taxes, net 10,106 20,794 13,831  
Non-current deferred income taxes, net 349,004 287,047 285,102  
ASU 2015-17 | Restatement Adjustment        
Summary Of Significant Accounting Policies [Line Items]        
Deferred tax asset reduction   (147,600)    
Non-current deferred income taxes, net   (2,200)    
Non-current deferred income taxes, net   (149,800)    
ASU 2015-03 | Restatement Adjustment        
Summary Of Significant Accounting Policies [Line Items]        
Other assets   (10,300) (9,100)  
Long-term debt   $ (10,300) $ (9,100)  
Outside United States        
Summary Of Significant Accounting Policies [Line Items]        
Cash and cash equivalents 1,217,600      
Reinvest Undistributed Earnings        
Summary Of Significant Accounting Policies [Line Items]        
Cash and cash equivalents $ 296,000      
Minimum        
Summary Of Significant Accounting Policies [Line Items]        
Short-term investments maturity term 90 days      
Maximum        
Summary Of Significant Accounting Policies [Line Items]        
Short-term investments maturity term 1 year