v2.4.1.9

Employee Benefit Plans (Summary of Share-Based Awards available for Grant) (Details) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended
	Apr. 25, 2015	Jul. 26, 2014
Employee Stock Benefit Plans [Abstract]
Balance at beginning of fiscal period	310us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	228us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Restricted stock, stock units, and other share-based awards granted	(79)csco_Reductionfromavailableforgrantsharebalanceduetoissuanceofstockawards	(98)csco_Reductionfromavailableforgrantsharebalanceduetoissuanceofstockawards
Share-based awards canceled/forfeited/expired	33us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationForfeited	36us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationForfeited
Additional shares reserved		135us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
Shares withheld for taxes and not issued	23csco_Shareswithheldfortaxandnotissued	6csco_Shareswithheldfortaxandnotissued
Other	(2)csco_AdjustmenttoShareBasedAwardsGrantsForThePeriod	3csco_AdjustmenttoShareBasedAwardsGrantsForThePeriod
Balance at end of fiscal period	285us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	310us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

X

- Definition

Adjustment to Share Based Awards Grants For The Period

+ References

No definition available.

+ Details

Name:	csco_AdjustmenttoShareBasedAwardsGrantsForThePeriod
Namespace Prefix:	csco_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Reduction from available for grant share balance due to issuance of stock awards

+ References

No definition available.

+ Details

Name:	csco_Reductionfromavailableforgrantsharebalanceduetoissuanceofstockawards
Namespace Prefix:	csco_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Shares withheld for tax and not issued

+ References

No definition available.

+ Details

Name:	csco_Shareswithheldfortaxandnotissued
Namespace Prefix:	csco_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of shares (or other type of equity) forfeited during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationForfeited
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration