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Leases - Narrative (Details)
$ in Millions
 12 Months Ended
Jan. 30, 2016
USD ($)
option
Jan. 31, 2015
USD ($)
Feb. 01, 2014
USD ($)
Leases [Abstract]      
Capital lease interest expense $ 42 $ 38 $ 39
Operating Leased Assets [Line Items]      
Number of renewal lease options, minimum | option 1    
Asset values under capital leases $ 735 711  
Net asset values under capital leases 321 $ 242  
Operating leases options to extend lease terms that are reasonably assured of being exercised 1,995    
Operating leases legally binding minimum lease payments for stores expected to open in next year or later 90    
Capital leases options to extend lease terms that are reasonably assured of being exercised 614    
Capital leases legally binding minimum lease payments for stores that will open in next year or later 311    
Current portion of present value of future minimum capital leases payments $ 59    
Minimum      
Operating Leased Assets [Line Items]      
Period for which each option to extend the lease term is available 1 year    
Maximum      
Operating Leased Assets [Line Items]      
Period for which each option to extend the lease term is available 50 years