XML 159 R74.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Derivatives - Fair Value and Balance Sheet Location of Derivative Instruments (Detail) (Other assets [Member], Canadian dollar foreign exchange contract [Member], USD $) | Apr. 28, 2013 | Apr. 29, 2012
--- | --- | ---
Other assets [Member] | Canadian dollar foreign exchange contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Fair values of derivative instruments |  |

X
- Definition Fair value of all asset derivatives designated as cash flow hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
Name: | us-gaap_CashFlowHedgeDerivativeInstrumentAssetsAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativesFairValueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration