v2.4.1.9

Segment Information and Major Customers (Additional Information) (Details) (USD $)	3 Months Ended		9 Months Ended
	Apr. 25, 2015	Apr. 26, 2014	Apr. 25, 2015	Apr. 26, 2014	Jul. 26, 2014
Segment Reporting Information [Line Items]
Number of geographic segments			3us-gaap_NumberOfReportableSegments
Revenue	$ 12,137,000,000us-gaap_SalesRevenueNet	$ 11,545,000,000us-gaap_SalesRevenueNet	$ 36,318,000,000us-gaap_SalesRevenueNet	$ 34,785,000,000us-gaap_SalesRevenueNet
United States
Segment Reporting Information [Line Items]
Revenue	6,400,000,000us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US	5,900,000,000us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US	19,100,000,000us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US	17,900,000,000us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US
Cash and cash equivalents and investments	2,600,000,000us-gaap_CashCashEquivalentsAndShortTermInvestments / us-gaap_StatementGeographicalAxis = country_US		2,600,000,000us-gaap_CashCashEquivalentsAndShortTermInvestments / us-gaap_StatementGeographicalAxis = country_US		4,700,000,000us-gaap_CashCashEquivalentsAndShortTermInvestments / us-gaap_StatementGeographicalAxis = country_US
International
Segment Reporting Information [Line Items]
Cash and cash equivalents and investments	$ 51,800,000,000us-gaap_CashCashEquivalentsAndShortTermInvestments / us-gaap_StatementGeographicalAxis = csco_InternationalMember		$ 51,800,000,000us-gaap_CashCashEquivalentsAndShortTermInvestments / us-gaap_StatementGeographicalAxis = csco_InternationalMember		$ 47,400,000,000us-gaap_CashCashEquivalentsAndShortTermInvestments / us-gaap_StatementGeographicalAxis = csco_InternationalMember

X

- Definition

Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951



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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_CashCashEquivalentsAndShortTermInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

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

+ Details

Name:	us-gaap_SalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=csco_InternationalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: