Segment Information and Major Customers (Summary Of Reportable Segments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jul. 26, 2014	Jul. 27, 2013	Jul. 28, 2012
Segment Reporting Information [Line Items]
Revenue:	$ 47,142	$ 48,607	$ 46,061
Gross margin:	27,769	29,440	28,209
Unallocated corporate items
Segment Reporting Information [Line Items]
Gross margin:	(1,562)	(960)	(554)
Americas
Segment Reporting Information [Line Items]
Revenue:	27,781	28,639	26,501
Gross margin:	17,379	17,887	16,639
EMEA
Segment Reporting Information [Line Items]
Revenue:	12,006	12,210	12,075
Gross margin:	7,700	7,876	7,605
APJC
Segment Reporting Information [Line Items]
Revenue:	7,355	7,758	7,485
Gross margin:	4,252	4,637	4,519
Segment total
Segment Reporting Information [Line Items]
Gross margin:	$ 29,331	$ 30,400	$ 28,763