Consolidated Statements Of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 26, 2013	Jan. 28, 2012	Jan. 26, 2013	Jan. 28, 2012
NET SALES:
Product	$ 9,437	$ 9,118	$ 18,734	$ 18,070
Service	2,661	2,409	5,240	4,713
Total net sales	12,098	11,527	23,974	22,783
COST OF SALES:
Product	3,857	3,650	7,605	7,213
Service	898	812	1,787	1,615
Total cost of sales	4,755	4,462	9,392	8,828
GROSS MARGIN	7,343	7,065	14,582	13,955
OPERATING EXPENSES:
Research and development	1,452	1,339	2,883	2,714
Sales and marketing	2,387	2,395	4,803	4,847
General and administrative	584	497	1,144	1,049
Amortization of purchased intangible assets	118	97	240	196
Restructuring and other charges	13	3	72	205
Total operating expenses	4,554	4,331	9,142	9,011
OPERATING INCOME	2,789	2,734	5,440	4,944
Interest income	160	158	321	322
Interest expense	(147)	(150)	(295)	(298)
Other income (loss), net	(22)	7	(55)	26
Interest and other income, net	(9)	15	(29)	50
INCOME BEFORE PROVISION FOR (BENEFIT FROM) INCOME TAXES	2,780	2,749	5,411	4,994
Provision for (benefit from) income taxes	(363)	567	176	1,035
NET INCOME	$ 3,143	$ 2,182	$ 5,235	$ 3,959
Net income per share-basic (in dollars per share)	$ 0.59	$ 0.41	$ 0.99	$ 0.74
Net income per share-diluted (in dollars per share)	$ 0.59	$ 0.40	$ 0.98	$ 0.73
Shares used in per-share calculation-basic (in shares)	5,318	5,368	5,310	5,381
Shares used in per-share calculation-diluted (in shares)	5,357	5,401	5,344	5,404
Cash dividends declared per common share (in dollars per share)	$ 0.14	$ 0.06	$ 0.28	$ 0.12