Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	May 03, 2014	Feb. 01, 2014	May 04, 2013
Commitments and Contingencies Disclosure [Line Items]
Reserves relating to legal claims	$ 1.8	$ 1.3	$ 0.9
Minimum lease payments for operating leases January 31, 2015	191.4
Minimum lease payments for operating leases January 30, 2016	267.1
Minimum lease payments for operating leases January 28, 2017	254.4
Minimum lease payments for operating leases February 3, 2018	234.3
Minimum lease payments for operating leases February 2, 2019	207.3
Minimum lease payments for operating leases subsequent years thereafter	741.8
Letters of credit, outstanding amount	40.9	43.9	44.1
14 stores and one warehouse that the Company has committed to open
Commitments and Contingencies Disclosure [Line Items]
Minimum lease payments	209.2
Number of stores committed to open	17
Number of warehouse comitted to open	2
Guarantee Performance Under Insurance And Utility Agreement
Commitments and Contingencies Disclosure [Line Items]
Letters of credit, outstanding amount	29.6	28.8	31.5
Merchandising Agreement
Commitments and Contingencies Disclosure [Line Items]
Letters of credit, outstanding amount	11.3	15.1	12.6
ABL Letters of Credit
Commitments and Contingencies Disclosure [Line Items]
Letters of credit, outstanding amount	$ 508.2	$ 456.2	$ 484.8