Debt (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Aug. 22, 2014	Aug. 02, 2014 CreditFacility	Feb. 01, 2014 CreditFacility	Aug. 02, 2014 August 2013 Facility [Member]	Feb. 01, 2014 August 2013 Facility [Member]	Aug. 02, 2014 November 2013 Facility [Member]	Feb. 01, 2014 November 2013 Facility [Member]
Line of Credit Facility [Line Items]
Number of unsecured credit facilities		2	2
Expiration date of renewed facility				Aug. 22, 2014	Aug. 22, 2014	Nov. 18, 2014	Nov. 18, 2014
Maximum borrowing capacity under renewed facility				$ 30.0	$ 30.0	$ 50.0	$ 50.0
Description of variable interest rate basis	Higher of prime, federal funds plus 0.5% or LIBOR			Higher of prime, federal funds plus 0.5% or LIBOR	Higher of prime, federal funds plus 0.5% or LIBOR	prime	prime
Basis spread on variable interest rate (in hundredths)	0.50%			0.50%	0.50%	2.00%	2.00%
Available borrowings under credit facilities		80.0	80.0
Debt outstanding at period end				$ 0	$ 0	$ 0	$ 0