Business And Geographic Segment Information Business And Geographic Segment Information Business And Geographic Segment Information (Geographic Information, Long-lived Assets) (Details) (USD $) In Millions, unless otherwise specified	Aug. 03, 2014	Jul. 28, 2013	Jul. 29, 2012
Segment Reporting Information [Line Items]
Plant assets, net of depreciation	$ 2,318	$ 2,260	$ 2,127
UNITED STATES
Segment Reporting Information [Line Items]
Plant assets, net of depreciation	1,844	1,804	1,538
AUSTRALIA
Segment Reporting Information [Line Items]
Plant assets, net of depreciation	306	317	356
Other Countries [Member]
Segment Reporting Information [Line Items]
Plant assets, net of depreciation	$ 168	$ 139	$ 233