Summary of Significant Accounting Policies (Cash and Cash Equivalents) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016
Significant Accounting Policies [Line Items]
Cash Equivalents	$ 36.3	$ 22.6
Cash and Cash Equivalents [Member]
Significant Accounting Policies [Line Items]
Cash Equivalents	$ 4.3	$ 3.9
Minimum [Member]
Significant Accounting Policies [Line Items]
Debit and credit card transaction processing period (hours)	24 hours
Maximum [Member]
Significant Accounting Policies [Line Items]
Debit and credit card transaction processing period (hours)	48 hours