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Capital Stock and Earnings Per Share - Additional Information (Detail) - USD ($)
 3 Months Ended
Apr. 30, 2016
May. 02, 2015
Feb. 29, 2016
Jan. 30, 2016
Feb. 28, 2015
Capital Unit [Line Items]          
Common stock repurchased and retired $ 341,251,000        
Cash payments for repurchase of common stock $ 341,251,000 $ 419,905,000      
Preferred stock, shares authorized 5,000,000 5,000,000   5,000,000  
Preferred stock, par value $ 1 $ 1   $ 1  
Antidilutive options excluded 4,100,000 4,700,000      
Trade Date Basis          
Capital Unit [Line Items]          
Common stock repurchased and retired (in shares) 5,000,000        
Common stock repurchased and retired $ 375,000,000        
Stock Repurchase Programs 2015          
Capital Unit [Line Items]          
Common stock repurchased and retired (in shares) 12,300,000        
Common stock repurchased and retired $ 884,200,000        
Stock repurchase program, common stock purchase value         $ 2,000,000,000
Remaining available stock under stock repurchase plan $ 1,100,000,000        
Stock Repurchase Programs 2016          
Capital Unit [Line Items]          
Stock repurchase program, common stock purchase value     $ 2,000,000,000