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Goodwill and Intangible Assets (Details) (USD $)	12 Months Ended
	Jul. 27, 2013	Jul. 28, 2012	Jul. 30, 2011	Jul. 26, 2014
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Goodwill	$ 267,810,000	$ 174,849,000		$ 269,088,000
Amortization expense for finite-lived intangible assets	$ 18,300,000	$ 20,700,000	$ 6,500,000
Goodwill
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Reporting units as a percent of consolidated goodwill balance	20.00%
Fair value assumptions, expected term	7 years

X

- Definition

Fair Value Assumptions, Qualitative Assessments, Asset Percent

+ References

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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- Definition

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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