Segment Information And Major Customers (Reportable Segments) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 26, 2014	Apr. 27, 2013	Apr. 26, 2014	Apr. 27, 2013
Segment Reporting Information [Line Items]
Revenues	$ 11,545	$ 12,216	$ 34,785	$ 36,190
Segment Gross Margin	7,239	7,701	21,696	22,685
Total Gross Margin	7,006	7,511	20,364	22,093
Unallocated Corporate Items
Segment Reporting Information [Line Items]
Total Gross Margin	(233)	(190)	(1,332)	(592)
Americas
Segment Reporting Information [Line Items]
Revenues	6,689	7,127	20,465	21,286
Segment Gross Margin	4,196	4,460	12,823	13,341
EMEA
Segment Reporting Information [Line Items]
Revenues	3,068	3,131	8,897	9,065
Segment Gross Margin	1,967	2,044	5,725	5,850
Asia Pacific Japan And China
Segment Reporting Information [Line Items]
Revenues	1,788	1,958	5,423	5,839
Segment Gross Margin	$ 1,076	$ 1,197	$ 3,148	$ 3,494