Business And Geographic Segment Information Business And Geographic Segment Information (Geographic Information, Long-Lived Assets) (Details) (USD $) In Millions, unless otherwise specified	Jul. 29, 2012		Jul. 31, 2011		Aug. 01, 2010
Long-lived assets	$ 2,127		$ 2,103		$ 2,051
United States
Long-lived assets	1,308		1,281		1,279
Australia/Asia Pacific [Member]
Long-lived assets	395		384		326
Europe [Member]
Long-lived assets	92		102		104
Other Countries [Member]
Long-lived assets	102		109		105
Corporate [Member]
Long-lived assets	$ 230	[1]	$ 227	[1]	$ 237	[1]

[1] Represents primarily corporate offices.