v2.4.1.9

Segment Information and Major Customers (Summary Of Reportable Segments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 25, 2015	Apr. 26, 2014	Apr. 25, 2015	Apr. 26, 2014
Segment Reporting Information [Line Items]
Revenue	$ 12,137us-gaap_SalesRevenueNet	$ 11,545us-gaap_SalesRevenueNet	$ 36,318us-gaap_SalesRevenueNet	$ 34,785us-gaap_SalesRevenueNet
Gross margin	7,525us-gaap_GrossProfit	7,006us-gaap_GrossProfit	21,948us-gaap_GrossProfit	20,364us-gaap_GrossProfit
Unallocated corporate items
Segment Reporting Information [Line Items]
Gross margin	(64)us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = us-gaap_MaterialReconcilingItemsMember	(233)us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = us-gaap_MaterialReconcilingItemsMember	(759)us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = us-gaap_MaterialReconcilingItemsMember	(1,332)us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = us-gaap_MaterialReconcilingItemsMember
Americas
Segment Reporting Information [Line Items]
Revenue	7,252us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember	6,689us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember	21,854us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember	20,465us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
Gross margin	4,560us-gaap_GrossProfit / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember	4,196us-gaap_GrossProfit / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember	13,776us-gaap_GrossProfit / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember	12,823us-gaap_GrossProfit / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
EMEA
Segment Reporting Information [Line Items]
Revenue	3,119us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember	3,068us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember	9,212us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember	8,897us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember
Gross margin	1,949us-gaap_GrossProfit / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember	1,967us-gaap_GrossProfit / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember	5,774us-gaap_GrossProfit / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember	5,725us-gaap_GrossProfit / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember
APJC
Segment Reporting Information [Line Items]
Revenue	1,766us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember	1,788us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember	5,252us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember	5,423us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember
Gross margin	1,080us-gaap_GrossProfit / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember	1,076us-gaap_GrossProfit / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember	3,157us-gaap_GrossProfit / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember	3,148us-gaap_GrossProfit / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember
Segment total
Segment Reporting Information [Line Items]
Gross margin	$ 7,589us-gaap_GrossProfit / csco_StatementSegmentReportingAxis = csco_SegmentReportingInformationGrossMarginMember	$ 7,239us-gaap_GrossProfit / csco_StatementSegmentReportingAxis = csco_SegmentReportingInformationGrossMarginMember	$ 22,707us-gaap_GrossProfit / csco_StatementSegmentReportingAxis = csco_SegmentReportingInformationGrossMarginMember	$ 21,696us-gaap_GrossProfit / csco_StatementSegmentReportingAxis = csco_SegmentReportingInformationGrossMarginMember

X

- Definition

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

+ 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 210.5-03.1,2)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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X

- Definition

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)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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- Details

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X

- Details

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X

- Details

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X

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