Commitments and Contingencies Narrative (Details) - Settled Litigation - Fair Labor Standards Act - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Apr. 29, 2016	Jul. 24, 2015	Apr. 24, 2015
Loss Contingencies [Line Items]
Litigation charges		$ 10,500	$ 6,000
Favorable adjustment	$ 3,344

Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

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