Organization and Basis of Presentation (Fiscal Year) (Details) - weeks	12 Months Ended
	Jan. 29, 2017	Jan. 31, 2016	Jan. 25, 2015
Fiscal Year [Line Items]
Number of weeks in reporting period	52	53	52
Minimum
Fiscal Year [Line Items]
Number of weeks in reporting period	52
Maximum
Fiscal Year [Line Items]
Number of weeks in reporting period	53