Goodwill and Purchased Intangible Assets (Schedule Of Purchased Intangible Assets With Finite And Indefinite Lives) (Details) (USD $) In Millions, unless otherwise specified	Jul. 26, 2014	Jul. 27, 2013
Business Acquisition [Line Items]
Gross	$ 5,857	$ 5,159
Accumulated Amortization	(2,709)	(1,842)
Net	3,148	3,317
In-process research and development, with indefinite lives	132	86
Total- Gross	5,989	5,245
Total- Net	3,280	3,403
TECHNOLOGY
Business Acquisition [Line Items]
Gross	4,100	3,563
Accumulated Amortization	(1,976)	(1,366)
Net	2,124	2,197
CUSTOMER RELATIONSHIPS
Business Acquisition [Line Items]
Gross	1,706	1,566
Accumulated Amortization	(720)	(466)
Net	986	1,100
OTHER
Business Acquisition [Line Items]
Gross	51	30
Accumulated Amortization	(13)	(10)
Net	$ 38	$ 20