Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1,2)
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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Segment Information and Major Customers (Summary of Reportable Segments) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jul. 29, 2017	Apr. 29, 2017	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Jan. 23, 2016	Oct. 24, 2015	Jul. 29, 2017	Jul. 30, 2016	Jul. 25, 2015
Segment Reporting Information [Line Items]
Revenue:	$ 12,133	$ 11,940	$ 11,580	$ 12,352	$ 12,638	$ 12,000	$ 11,927	$ 12,682	$ 48,005	$ 49,247	$ 49,161
Gross margin:	$ 7,546	$ 7,518	$ 7,276	$ 7,884	$ 7,975	$ 7,721	$ 7,432	$ 7,832	30,224	30,960	29,681
Unallocated corporate items
Segment Reporting Information [Line Items]
Gross margin:									(656)	(644)	(1,001)
Operating Segments \| Americas
Segment Reporting Information [Line Items]
Revenue:									28,351	29,392	29,626
Gross margin:									18,284	18,986	18,638
Operating Segments \| EMEA
Segment Reporting Information [Line Items]
Revenue:									12,004	12,302	12,348
Gross margin:									7,855	7,998	7,731
Operating Segments \| APJC
Segment Reporting Information [Line Items]
Revenue:									7,650	7,553	7,187
Gross margin:									4,741	4,620	4,313
Segment Reconciling Items
Segment Reporting Information [Line Items]
Gross margin:									$ 30,880	$ 31,604	$ 30,682