v2.4.1.9

Goodwill and Purchased Intangible Assets (Schedule Of Goodwill By Reportable Segments) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Apr. 25, 2015
Goodwill [Roll Forward]
Balance (Beg)	$ 24,239us-gaap_Goodwill
Acquisitions	184us-gaap_GoodwillAcquiredDuringPeriod
Other	(25)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments
Balance (End)	24,398us-gaap_Goodwill
Americas
Goodwill [Roll Forward]
Balance (Beg)	15,080us-gaap_Goodwill / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
Acquisitions	99us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
Other	(13)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
Balance (End)	15,166us-gaap_Goodwill / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
EMEA
Goodwill [Roll Forward]
Balance (Beg)	5,715us-gaap_Goodwill / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember
Acquisitions	67us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember
Other	(7)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember
Balance (End)	5,775us-gaap_Goodwill / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember
APJC
Goodwill [Roll Forward]
Balance (Beg)	3,444us-gaap_Goodwill / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember
Acquisitions	18us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember
Other	(5)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember
Balance (End)	$ 3,457us-gaap_Goodwill / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

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

X

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

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Balance Type:	debit
Period Type:	duration

X

- Details

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

X

- Definition

Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

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Balance Type:	debit
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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