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Debt and Credit Facilities - Additional Information (Details)
$ in Millions, ¥ in Billions
9 Months Ended
Oct. 31, 2015
JPY (¥)
Oct. 31, 2015
USD ($)
Jan. 31, 2015
USD ($)
Nov. 01, 2014
USD ($)
Debt Instrument [Line Items]        
Short-Term Loans Payable   $ 400    
Short-term Debt, Fair Value   400    
Letter of Credit [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Term 2 years      
Maximum borrowing capacity   50    
Expiration date Sep. 30, 2016      
Borrowings   0    
5.95 Percent Notes Due April 2021        
Debt Instrument [Line Items]        
Aggregate principal amount of notes issued   $ 1,250    
Notes, interest rate 5.95% 5.95%    
Notes, maturity date Apr. 12, 2021      
Estimated fair value   $ 1,330 $ 1,440 $ 1,410
Japan Term Loan [Member]        
Debt Instrument [Line Items]        
Aggregate principal amount of notes issued | ¥ ¥ 15.0      
Notes, maturity date Jan. 15, 2018      
Estimated fair value   104 $ 106 $ 133
Debt Instrument, Term 4 years      
Debt Instrument, Date of First Required Payment Jan. 15, 2015      
Debt Instrument, Annual Principal Payment ¥ 2.5 21    
Long-term Debt, Maturities, Repayments of Principal in Year Three ¥ 7.5 62    
Foreign Facilities [Member]        
Debt Instrument [Line Items]        
Maximum borrowing capacity   49    
Borrowings   0    
Bank guarantees related to store leases   12    
Amended Five-Year Unsecured Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Term 5 years      
Maximum borrowing capacity   500    
Expiration date May 01, 2020      
Unsecured committed letter of credit amount   0    
Borrowings   0    
Standby Letters of Credit [Member]        
Debt Instrument [Line Items]        
Unsecured committed letter of credit amount   $ 21    
400 Million Dollar Term Loan [Member]        
Debt Instrument [Line Items]        
Notes, maturity date Oct. 15, 2016