Changes in Equity 2 (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	3 Months Ended
Oct. 28, 2012	Oct. 26, 2011	Jul. 29, 2012 Coniexpress Sa Industrias Alimenticias [Member]	Apr. 29, 2012 Coniexpress Sa Industrias Alimenticias [Member]
Stockholders Equity [Line Items]
Noncontrolling Interest, Decrease from Purchase of Interests			15.00%
Payments to Acquire Additional Interest in Subsidiaries	$ 80,132	$ 54,824	$ 80,100
Noncontrolling Interest, Ownership Percentage by Parent				80.00%

The cash outflow associated with the purchase of noncontrolling interest during the period.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 17

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration