Commitments And Contingencies (Narrative) (Details) In Millions, unless otherwise specified	12 Months Ended		12 Months Ended
Jul. 31, 2011 USD ($)	Aug. 01, 2010 USD ($)	Aug. 02, 2009 USD ($)	Jul. 31, 2011 AUD	Aug. 02, 2009 Two Increments [Member] AUD
Rent expense under operating lease commitments	$ 50	$ 48	$ 47
Number of bank loans guarantees related to independent distributors	2,000
Maximum potential amount of future payments	162
Loan facility amount	10			10
Draw down amount					5

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 45
-Paragraph 13
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

Name:	us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant