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Segment Geographic and Significant Customer Information - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Apr. 24, 2015 Segment	Apr. 25, 2014 Segment	Apr. 26, 2013 Segment
Segment Reporting Information [Line Items]
Number of industry segment	1us-gaap_NumberOfOperatingSegments	1us-gaap_NumberOfOperatingSegments	1us-gaap_NumberOfOperatingSegments
Net revenues	$ 6,122.7us-gaap_SalesRevenueNet	$ 6,325.1us-gaap_SalesRevenueNet	$ 6,332.4us-gaap_SalesRevenueNet
U.S.
Segment Reporting Information [Line Items]
Net revenues	$ 3,096.1us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US	$ 3,130.9us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US	$ 3,152.7us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US

X

- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

No definition available.

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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