Business And Geographic Segment Information Business And Geographic Segment Information (Geographic Information, Long-lived Assets) (Details) (USD $) In Millions, unless otherwise specified	Jul. 28, 2013		Jul. 29, 2012		Jul. 31, 2011
Property, Plant and Equipment, Net	$ 2,260		$ 2,127		$ 2,103
UNITED STATES
Property, Plant and Equipment, Net	1,583		1,308		1,281
AUSTRALIA
Property, Plant and Equipment, Net	317		356		347
Other Countries [Member]
Property, Plant and Equipment, Net	139		233		248
Corporate [Member]
Property, Plant and Equipment, Net	$ 221	[1]	$ 230	[1]	$ 227	[1]

[1] Represents primarily corporate offices.