v3.5.0.2

Commitments and Contingencies (Additional Information) (Details) $ in Millions |  | 3 Months Ended | 12 Months Ended | 27 Months Ended | 39 Months Ended |
--- | --- | --- | --- | --- | --- | ---
May 12, 2016 USD ($) | Oct. 29, 2016 USD ($) | Oct. 24, 2015 USD ($) | Jan. 25, 2014 USD ($) | Jul. 27, 2013 | Apr. 28, 2012 USD ($) | Jul. 30, 2016 USD ($) | Jul. 25, 2015 USD ($) | Sep. 04, 2014 patent | Oct. 29, 2016 USD ($) | Oct. 29, 2016 USD ($) | Oct. 26, 2013 USD ($)
Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase commitments |  | $ 3,920.0 |  |  |  |  | $ 3,896.0 |  |  | $ 3,920.0 | $ 3,920.0 |
Liability for purchase commitments |  | 161.0 |  |  |  |  | 159.0 |  |  | 161.0 | 161.0 |
Future compensation expense & contingent consideration, maximum |  | 299.0 |  |  |  |  |  |  |  | 299.0 | 299.0 |
Commitments and contingencies |  |  |  |  |  |  |  |  |  |  |  |
Volume of channel partner financing |  | 6,900.0 | $ 6,900.0 |  |  |  |  |  |  |  |  |
Balance of the channel partner financing subject to guarantees |  | 1,000.0 |  |  |  |  | 1,100.0 |  |  | 1,000.0 | 1,000.0 |
Financing provided by third parties for leases and loans on which the Company has provided guarantees |  | 6.0 | 23.0 |  |  |  |  |  |  |  |  |
Charge to product cost of sales |  | 3,403.0 | 3,853.0 |  |  |  |  |  |  |  |  |
Adjustments to product cost of sales |  | 0.0 | 10.0 |  |  |  |  |  |  |  |  |
Brazilian authority claim of import tax evasion by importer tax portion |  | 253.0 |  |  |  |  |  |  |  | 253.0 | 253.0 |
Brazilian authority claim of import tax evasion by importer interest portion |  | 1,300.0 |  |  |  |  |  |  |  | 1,300.0 | 1,300.0 |
Brazilian authority claim of import tax evasion by importer penalties portion |  | $ 1,200.0 |  |  |  |  |  |  |  | 1,200.0 | 1,200.0 |
SRI International |  |  |  |  |  |  |  |  |  |  |  |
Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Damages awarded, value | $ 23.7 |  |  |  |  |  |  |  |  |  |  |
SRI International | Pending Litigation |  |  |  |  |  |  |  |  |  |  |  |
Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of allegedly infringed patents | patent |  |  |  |  |  |  |  |  | 2 |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |
Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Warranty period for products, in years |  | 5 years |  |  |  |  |  |  |  |  |  |
Channel partners revolving short-term financing payment term, in days |  | 90 days |  |  |  |  |  |  |  |  |  |
End user lease and loan term, in years |  | 3 years |  |  |  |  |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |
Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Warranty period for products, in days |  | 90 days |  |  |  |  |  |  |  |  |  |
Channel partners revolving short-term financing payment term, in days |  | 60 days |  |  |  |  |  |  |  |  |  |
Insieme Networks Inc |  |  |  |  |  |  |  |  |  |  |  |
Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable interest entities investment |  |  |  |  |  | $ 100.0 |  |  |  |  |  |
Ownership percentage as a result of investment |  |  |  |  | 83.00% |  |  |  |  |  |  |
Compensation expense related to acquisitions |  | $ 20.0 | 51.0 |  |  |  |  |  |  | 803.0 |  |
Payments to acquire additional interest in subsidiaries |  | 323.0 | $ 291.0 |  |  |  |  |  |  |  | 712.0 |
Insieme Networks Inc | Including compensation that has been expensed through current reporting period | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Commitments and contingencies |  | 834.0 |  |  |  |  |  |  |  | 834.0 | 834.0 |
Supplier Component Remediation Liability |  |  |  |  |  |  |  |  |  |  |  |
Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Commitments and contingencies |  | $ 265.0 |  |  |  |  | 276.0 |  |  | $ 265.0 | $ 265.0 | $ 63.0
Charge to product cost of sales |  |  |  | $ 655.0 |  |  |  |  |  |  |  |
Supplier Component Remediation Liability | Cost of Goods, Product Line |  |  |  |  |  |  |  |  |  |  |  |
Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Adjustments to product cost of sales |  |  |  |  |  |  | $ 74.0 | $ 164.0 |  |  |  |

X
- Definition Brazilian authority claim of import tax evasion by importer, interest portion + References No definition available. + Details
Name: | csco_BrazilianAuthorityClaimOfImportTaxEvasionByImporterInterestPortion
Namespace Prefix: | csco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Brazilian authority claim of import tax evasion by importer penalties portion + References No definition available. + Details
Name: | csco_BrazilianAuthorityClaimOfImportTaxEvasionByImporterPenaltiesPortion
Namespace Prefix: | csco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Brazilian authority claim of import tax evasion by importer, tax portion + References No definition available. + Details
Name: | csco_BrazilianAuthorityClaimOfImportTaxEvasionByImporterTaxPortion
Namespace Prefix: | csco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Channel Partner Financing Revolving Short Term Financing Payment Term Days + References No definition available. + Details
Name: | csco_ChannelPartnerFinancingRevolvingShortTermFinancingPaymentTermDays
Namespace Prefix: | csco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Channel Partner Financing Subject To Guarantees + References No definition available. + Details
Name: | csco_ChannelPartnerFinancingSubjectToGuarantees
Namespace Prefix: | csco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition End user lease and loan (with registrant guarantee) term. + References No definition available. + Details
Name: | csco_EndUserLeaseAndLoanTerm
Namespace Prefix: | csco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated future cash compensation expense (maximum amount) + References No definition available. + Details
Name: | csco_Estimatedfuturecashcompensationexpensemaximumamount
Namespace Prefix: | csco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Third Parties Financing Arrangements With Company Guarantee + References No definition available. + Details
Name: | csco_ThirdPartiesFinancingArrangementsWithCompanyGuarantee
Namespace Prefix: | csco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Warranty period for products. + References No definition available. + Details
Name: | csco_WarrantyPeriodForProducts
Namespace Prefix: | csco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Warranty Time Period + References No definition available. + Details
Name: | csco_WarrantyTimePeriod
Namespace Prefix: | csco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.(a),19) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.17) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 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 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CommitmentsAndContingencies
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Total costs related to goods produced and sold during the reporting period. + 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 210.5-03.2(a)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_CostOfGoodsSold
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The face amount of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References No definition available. + Details
Name: | us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Disclosure of gross transaction volume for revenues which are reported net. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=68058157&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 45 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68080631&loc=d3e61052-111654 + Details
Name: | us-gaap_GrossTransactionVolume
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate amount of expenditures for salaries, wages, profit sharing and incentive compensation, and other employee benefits, including equity-based compensation, and pension and other postretirement benefit expense. + 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 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_LaborAndRelatedExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of damages awarded to the plaintiff in the legal matter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
Name: | us-gaap_LossContingencyDamagesAwardedValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of another entity's patents that the entity has allegedly infringed. + References No definition available. + Details
Name: | us-gaap_LossContingencyPatentsAllegedlyInfringedNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow associated with the purchase of noncontrolling interest during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the standard and extended product warranty accrual from changes in estimates attributable to preexisting product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(4)) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
Name: | us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(19)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(17)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: 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(25)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SiteContingencyLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of financial or other support the reporting entity has provided (explicitly or implicitly) to the Variable Interest Entity (VIE) that it was not previously contractually required to provide or that the reporting entity intends to provide, including, for example, situations in which the reporting entity assisted the VIE in obtaining another type of support. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=64801991&loc=SL6759159-111685 + Details
Name: | us-gaap_VariableInterestEntityFinancialOrOtherSupportAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=64801991&loc=SL6759159-111685 + Details
Name: | us-gaap_VariableInterestEntityOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LitigationCaseAxis=csco_SRIInternationalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=csco_InsiemeNetworksIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NatureOfExpenseAxis=csco_IncludingcompensationthathasbeenexpensedthroughcurrentreportingperiodMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=csco_SupplierComponentRemediationLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NatureOfExpenseAxis=us-gaap_CostOfGoodsProductLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |