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Debt Interest Rates at Period End (Details)	3 Months Ended
	Jan. 28, 2017	Jul. 30, 2016
Standby Letters of Credit
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate at Period End	1.75%	2.00%
Credit Agreement - Term Loan (matures April 2020)
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate at Period End	2.53%	2.49%
Credit Agreement - Revolving facility (matures April 2020)
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate at Period End	0.00%	0.00%
Unutilized commitment fee (in percent)	0.35%	0.40%

X

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ 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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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X

- 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.

+ Details

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X

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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- Details

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- Details

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