Balance Sheet Details (Detail) (USD $) In Millions, unless otherwise specified	Jan. 25, 2014		Jul. 27, 2013
Inventories:
Raw materials	$ 81		$ 105
Work in process	6		24
Distributor inventory and deferred cost of sales	598		572
Manufactured finished goods	579		480
Total finished goods	1,177		1,052
Service-related spares	244		256
Demonstration systems	40		39
Total	1,548		1,476
Property and Equipment, net:
Land, buildings, and building & leasehold improvements	4,386		4,426
Computer equipment and related software	1,429		1,416
Production, engineering, and other equipment	5,826		5,721
Operating lease assets	313	[1]	326	[1]
Furniture and fixtures	503		497
Property, plant and equipment, gross	12,457		12,386
Less accumulated depreciation and amortization	(9,223)	[1]	(9,064)	[1]
Total	3,234		3,322
Other Assets:
Deferred tax assets	1,492		1,539
Investments in privately held companies	916		833
Other Assets	689		743
Total	3,097		3,115
Deferred Revenue Arrangement [Line Items]
Deferred Revenue, Current	9,350		9,262
Deferred Revenue, Noncurrent	3,894		4,161
Deferred Revenue	13,244		13,423
Service
Deferred Revenue Arrangement [Line Items]
Deferred Revenue	8,843		9,403
Product
Deferred Revenue Arrangement [Line Items]
Deferred Revenue	4,401		4,020
Product | Unrecognized revenue on product shipments and other [Member]
Deferred Revenue Arrangement [Line Items]
Deferred Revenue	3,549		3,340
Product | Cash receipts related to revenue from two-tier distributors [Member]
Deferred Revenue Arrangement [Line Items]
Deferred Revenue	$ 852		$ 680

[1] Accumulated depreciation related to operating lease assets was $194 and $203 as of January 25, 2014 and July 27, 2013, respectively.