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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
$ in Thousands, shares in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Aug. 01, 2015
Aug. 02, 2014
Aug. 01, 2015
Aug. 02, 2014
Jan. 31, 2015
Feb. 01, 2014
Summary Of Significant Accounting Policies [Line Items]            
Weeks in the fiscal year     364 days   364 days  
Share-based compensation $ 22,600 $ 22,200 $ 43,767 $ 42,000    
Options to purchase common stock exercised 0.5   2.2      
Options outstanding to purchase common stock 27.7   27.7      
Unrecognized compensation cost related to nonvested share-based compensation arrangements $ 112,800   $ 112,800      
Cash and cash equivalents 1,910,770 2,183,330 $ 1,910,770 2,183,330 $ 2,493,775 $ 2,149,746
Highly liquid investments maximum maturity days     90 days      
In-transit inventory accrual 638,200 $ 472,600 $ 638,200 $ 472,600 $ 495,200  
Assets held for sale     12,400      
Outside United States            
Summary Of Significant Accounting Policies [Line Items]            
Cash and cash equivalents 1,100,300   1,100,300      
Reinvest Undistributed Earnings            
Summary Of Significant Accounting Policies [Line Items]            
Cash and cash equivalents $ 327,000   $ 327,000      
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