Fair Value Measurements-valuation (Details)	12 Months Ended
Jan. 28, 2017
Unobservable Inputs [Line Items]
Weighted Average Cost of Capital (WACC)	16.00%
Minimum
Unobservable Inputs [Line Items]
Annual sales growth	0.00%
Maximum
Unobservable Inputs [Line Items]
Annual sales growth	7.00%

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration