Letter of Credit Agreement (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 02, 2015	Jan. 31, 2015	May 03, 2014
Letter of Credit [Line Items]
Letters of Credit Outstanding, Amount	$ 4.4	$ 9.3	$ 4.5
Restricted Cash and Investments, Current	6.6	11.5	6.4
Letter of Credit Agreement, initiation date	Aug. 02, 2013
Letter of Credit Agreement, Maximum Borrowing Capacity	$ 50
Letter of Credit Agreement, expiration date	Aug. 02, 2018
Letter of Credit Agreement, cash collateral account requirement	103.00%
Letter of Credit Agreement, cash collateral account (foreign currency)	105.00%