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
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Apr. 25, 2015
Goodwill [Roll Forward] |
Balance (Beg) | $ 24,239 us-gaap_Goodwill
Acquisitions | 184 us-gaap_GoodwillAcquiredDuringPeriod
Other | (25)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments
Balance (End) | 24,398 us-gaap_Goodwill
Americas |
Goodwill [Roll Forward] |
Balance (Beg) | 15,080 us-gaap_Goodwill / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
Acquisitions | 99 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
Other | (13)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
Balance (End) | 15,166 us-gaap_Goodwill / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
EMEA |
Goodwill [Roll Forward] |
Balance (Beg) | 5,715 us-gaap_Goodwill / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember
Acquisitions | 67 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember
Other | (7)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember
Balance (End) | 5,775 us-gaap_Goodwill / us-gaap_StatementGeographicalAxis = csco_EuropeMiddleEastAndAfricaMember
APJC |
Goodwill [Roll Forward] |
Balance (Beg) | 3,444 us-gaap_Goodwill / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember
Acquisitions | 18 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember
Other | (5)us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember
Balance (End) | $ 3,457 us-gaap_Goodwill / us-gaap_StatementGeographicalAxis = csco_AsiaPacificJapanAndChinaMember

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- 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

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- 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

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- Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- 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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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- 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: |