Balance Sheet Details (Details) - USD ($) $ in Millions	Oct. 24, 2015	Jul. 25, 2015
Inventories:
Raw materials	$ 107	$ 114
Work in process	1	2
Distributor inventory and deferred cost of sales	631	610
Manufactured finished goods	464	593
Total finished goods	1,095	1,203
Service-related spares	240	258
Demonstration systems	39	50
Total	1,482	1,627
Property and equipment, net:
Land, buildings, and building and leasehold improvements	4,561	4,495
Computer equipment and related software	1,276	1,310
Production, engineering, and other equipment	5,742	5,753
Operating lease assets	372	372
Furniture and fixtures	502	497
Property, plant and equipment, gross	12,453	12,427
Less: accumulated depreciation and amortization	(9,107)	(9,095)
Total	3,346	3,332
Other assets:
Deferred tax assets	1,583	1,648
Investments in privately held companies	928	897
Other	759	618
Total	3,270	3,163
Deferred Revenue Arrangement [Line Items]
Deferred revenue:	15,162	15,183
Current	9,821	9,824
Noncurrent	5,341	5,359
Service
Deferred Revenue Arrangement [Line Items]
Deferred revenue:	9,689	9,757
Product:
Deferred Revenue Arrangement [Line Items]
Deferred revenue:	5,473	5,426
Product: | Unrecognized revenue on product shipments and other deferred revenue
Deferred Revenue Arrangement [Line Items]
Deferred revenue:	4,888	4,766
Product: | Cash receipts related to unrecognized revenue from two-tier distributors
Deferred Revenue Arrangement [Line Items]
Deferred revenue:	$ 585	$ 660