Fair Value of Derivative Contracts on Gross Basis, by Type of Contract (Detail) (Forward Contracts, USD $) In Millions, unless otherwise specified	Apr. 30, 2011 Current Assets	Apr. 28, 2012 Current Liabilities	Jan. 28, 2012 Current Liabilities
Derivative [Line Items]
Fair value of derivative asset contracts, hedging instruments	$ 3
Fair value of derivative liability contracts, hedging instruments		2	2
Fair value of derivative asset contracts, non hedging instruments	$ 1

Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 17

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959

Name:	us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant