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Quarterly Financial Data (Unaudited) - Narratives (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 24, 2015	Jul. 29, 2017	Jul. 15, 2015
Interim Period, Costs Not Allocable [Line Items]
Debt extinguishment cost	$ 16.3
7.125% Senior Subordinated Notes
Interim Period, Costs Not Allocable [Line Items]
Debt, interest rate (in percent)	7.125%	7.125%	7.125%

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- Definition

Debt Extinguishment Cost

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Period Type:	instant

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- Definition

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.

+ References

No definition available.

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