Segment Information And Major Customers - Additional Information (Detail) (USD $)	12 Months Ended
	Jul. 27, 2013 customer	Jul. 28, 2012 customer	Jul. 30, 2011 customer
Segment Reporting Information [Line Items]
Number of geographic segments	three
Revenue	$ 48,607,000,000	$ 46,061,000,000	$ 43,218,000,000
Number of customer accounted for 10% or more net sales	0	0	0
UNITED STATES
Segment Reporting Information [Line Items]
Revenue	24,600,000,000	22,600,000,000	21,500,000,000
Cash and cash equivalents and investments	10,200,000,000	6,200,000,000
International
Segment Reporting Information [Line Items]
Cash and cash equivalents and investments	$ 40,400,000,000	$ 42,500,000,000