Balance Sheet Details (Detail) (USD $) In Millions, unless otherwise specified	Jan. 26, 2013		Jul. 28, 2012
Inventories:
Raw materials	$ 113		$ 127
Work in process	24		35
Distributor inventory and deferred cost of sales	648		630
Manufactured finished goods	498		597
Total finished goods	1,146		1,227
Service-related spares	248		213
Demonstration systems	43		61
Total	1,574		1,663
Property and Equipment, net:
Land, buildings, and building & leasehold improvements	4,491		4,363
Computer equipment and related software	1,455		1,469
Production, engineering, and other equipment	5,642		5,364
Operating lease assets	304	[1]	300	[1]
Furniture and fixtures	493		487
Property, plant and equipment, gross	12,385		11,983
Less accumulated depreciation and amortization	(8,982)	[1]	(8,581)
Total	3,403		3,402
Other Assets:
Deferred tax assets	1,807		2,270
Investments in privately held companies	869		858
Other	834		754
Total	3,510		3,882
Deferred Revenue:
Deferred Revenue Services	9,055		9,173
Unrecognized revenue on product shipments and other deferred revenue	3,309		2,975
Cash receipts related to unrecognized revenue from two-tier distributors	957		732
Total product deferred revenue	4,266		3,707
Deferred Revenue	13,321		12,880
Current	9,108		8,852
Noncurrent	$ 4,213		$ 4,028

[1] Accumulated depreciation related to operating lease assets was $186 and $181 as of January 26, 2013 and July 28, 2012, respectively.