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Income Taxes - Income Taxes Paid - Narrative (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Apr. 27, 2014	Apr. 28, 2013	Apr. 29, 2012
Income Tax Disclosure [Abstract]
Income tax payments, net of income tax refunds	$ 3.0	$ 2.8	$ 2.4

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- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586

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