Average balance of securities lending.

No definition available.

Name:	csco_AverageBalanceOfSecuritiesLending
Namespace Prefix:	csco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Fair value of securities received as collateral that can be resold or repledged percentage.

+ References

No definition available.

+ Details

Name:	csco_FairValueOfSecuritiesReceivedAsCollateralThatCanBeResoldOrRepledgedPercentage
Namespace Prefix:	csco_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Secured Lending Transactions Outstanding

+ References

No definition available.

+ Details

Name:	csco_SecuredLendingTransactionsOutstanding
Namespace Prefix:	csco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the amount of loss recognized for other than temporary impairments (OTTI) of investments in debt and equity securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 5.M)

-URI http://asc.fasb.org/extlink&oid=27011274&loc=d3e87990-122713

+ Details

Name:	us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563

+ Details

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

- Details

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

Investments - Additional Information (Detail) (USD $)	9 Months Ended			3 Months Ended		9 Months Ended
Investments - Additional Information (Detail) (USD $)	Apr. 26, 2014	Apr. 27, 2013	Jul. 27, 2013	Apr. 26, 2014 Publicly Traded Equity Securities	Apr. 27, 2013 Publicly Traded Equity Securities	Apr. 26, 2014 Publicly Traded Equity Securities	Apr. 27, 2013 Publicly Traded Equity Securities
Schedule of Available-for-sale Securities [Line Items]
Other than Temporary Impairment Losses recognized in earnings				$ 0	$ 0	$ 11,000,000	$ 0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held	0
Average Balance Of Securities Lending	1,400,000,000	700,000,000
Minimum market value percentage of loaned securities, required collateral (Percentage)	102.00%
Secured lending transactions outstanding	$ 0		$ 0