Goodwill and Intangible Assets - Estimated Fair Values of Reporting Units, Discounted Cash Flow Inputs (Details) (Goodwill [Member], Income approach)	12 Months Ended
Jan. 27, 2013
Minimum
Discounted Cash Flow Inputs [Line Items]
Discount rate	10.00%
Tax rate	14.70%
Peer company beta	1.3
Maximum
Discounted Cash Flow Inputs [Line Items]
Discount rate	13.00%
Perpetual growth rate	3.00%
Tax rate	20.00%
Risk-free rate	2.40%
Peer company beta	1.6

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=7578670&loc=d3e19207-110258

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