Basis of Presentation and Significant Accounting Policies Basis of Presentation and Significant Accounting Polices (Details)	12 Months Ended
Aug. 02, 2015	Aug. 03, 2014	Jul. 28, 2013
Fiscal Period Number Of Weeks	52	53	52
Building [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	45 years
Machinery and Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	20 years

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration