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Capital Stock and Earnings Per Share - Additional Information (Detail) - USD ($)
 3 Months Ended 9 Months Ended
Oct. 31, 2015
Nov. 01, 2014
Oct. 31, 2015
Nov. 01, 2014
Feb. 28, 2015
Feb. 28, 2014
Capital Unit [Line Items]            
Shares repurchased and retired shares 6,400,000   19,100,000      
Shares repurchased and retired value $ 458,800,000   $ 1,300,000,000      
Cash expenditures under repurchase programs     $ 1,296,104,000 $ 1,200,000,000    
Stock repurchase program, common stock purchase value         $ 2,000,000,000 $ 2,000,000,000
Preferred stock, shares authorized 5,000,000   5,000,000      
Preferred stock, par value $ 1   $ 1      
Antidilutive options excluded 4,200,000 8,900,000 4,200,000 8,900,000    
Stock Repurchase Programs 2014            
Capital Unit [Line Items]            
Shares repurchased and retired shares     29,900,000      
Shares repurchased and retired value     $ 2,000,000,000      
Remaining available stock under stock repurchase plan $ 400,000   $ 400,000