Goodwill And Purchased Intangible Assets (Scedule Of Goodwill By Reportable Segments) (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jan. 25, 2014
Goodwill [Roll Forward]
Balance, beginning	$ 21,919
Acquisitions	2,172
Other	(5)
Balance, ending	24,086
Americas
Goodwill [Roll Forward]
Balance, beginning	13,800
Acquisitions	1,198
Other	(3)
Balance, ending	14,995
EMEA
Goodwill [Roll Forward]
Balance, beginning	5,037
Acquisitions	638
Other	(2)
Balance, ending	5,673
APJC
Goodwill [Roll Forward]
Balance, beginning	3,082
Acquisitions	336
Other	0
Balance, ending	$ 3,418