Supplemental Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
May 03, 2015	Apr. 27, 2014
Supplemental Cash Flow Information [Abstract]
Employee Benefits And Deferred Compensation Payments	$ (43)	$ (42)
Other Operating Activities, Cash Flow Statement	(2)	(2)
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities	$ (45)	$ (44)

The sum of adjustments which are added to or deducted from net income or loss, including the portion attributable to noncontrolling interest, to reflect cash provided by or used in operating activities, in accordance with the indirect cash flow method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration