Balance Sheet Details (Details) - USD ($) $ in Millions	Oct. 29, 2016	Jul. 30, 2016
Inventories:
Raw materials	$ 111	$ 91
Finished goods:
Distributor inventory and deferred cost of sales	481	457
Manufactured finished goods	328	415
Total finished goods	809	872
Service-related spares	237	236
Demonstration systems	19	18
Total	1,176	1,217
Gross property and equipment:
Land, buildings, and building and leasehold improvements	4,819	4,778
Computer equipment and related software	1,292	1,288
Production, engineering, and other equipment	5,708	5,658
Operating lease assets	301	296
Furniture and fixtures	548	543
Total gross property and equipment	12,668	12,563
Less: accumulated depreciation and amortization	(9,169)	(9,057)
Total	3,499	3,506
Deferred Revenue Arrangement [Line Items]
Deferred revenue:	16,951	16,472
Current	10,215	10,155
Noncurrent	6,736	6,317
Service
Deferred Revenue Arrangement [Line Items]
Deferred revenue:	10,424	10,621
Product:
Deferred Revenue Arrangement [Line Items]
Deferred revenue:	6,527	5,851
Product: | Deferred revenue related to recurring software and subscription businesses
Deferred Revenue Arrangement [Line Items]
Deferred revenue:	3,801	3,308
Product: | Deferred revenue related to two-tier distributors
Deferred Revenue Arrangement [Line Items]
Deferred revenue:	439	377
Product: | Other product deferred revenue
Deferred Revenue Arrangement [Line Items]
Deferred revenue:	$ 2,287	$ 2,166