Business And Geographic Segment Information (Geographic Area Information, Long-Lived Assets) (Details) (USD $) In Millions	Jul. 31, 2011		Aug. 01, 2010		Aug. 02, 2009
Long-lived assets	$ 2,103		$ 2,051		$ 1,977
United States [Member]
Long-lived assets	1,281		1,279		1,388
Europe [Member]
Long-lived assets	102		104		119
Australia/Asia Pacific [Member]
Long-lived assets	384		326		283
Other Countries [Member]
Long-lived assets	109		105		108
Corporate [Member]
Long-lived assets	$ 227	[1]	$ 237	[1]	$ 79	[1]

[1] Represents primarily corporate offices.