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Capital Stock and Earnings Per Share - Additional Information (Detail) - USD ($)
shares in Millions
 3 Months Ended 9 Months Ended
Oct. 29, 2016
Oct. 31, 2015
Oct. 29, 2016
Oct. 31, 2015
Feb. 29, 2016
Feb. 28, 2015
Capital Unit [Line Items]            
Common stock repurchased and retired     $ 1,175,000,000      
Cash payments for repurchase of common stock     $ 1,175,000,000 $ 1,296,104,000    
Antidilutive options excluded 4.3 4.2 4.3 4.2    
Trade Date Basis            
Capital Unit [Line Items]            
Common stock repurchased and retired (in shares) 5.2   15.4      
Common stock repurchased and retired $ 400,000,000   $ 1,200,000,000      
Stock Repurchase Programs 2015            
Capital Unit [Line Items]            
Common stock repurchased and retired (in shares)     22.7      
Common stock repurchased and retired     $ 1,700,000,000      
Stock repurchase program, common stock purchase value           $ 2,000,000,000
Remaining available stock under stock repurchase plan $ 315,800,000   $ 315,800,000      
Stock Repurchase Programs 2016            
Capital Unit [Line Items]            
Stock repurchase program, common stock purchase value         $ 2,000,000,000