v2.4.1.9
Commitments and Contingencies (Additional Information) (Details) (USD $)
3 Months Ended 9 Months Ended 3 Months Ended 21 Months Ended 3 Months Ended
Apr. 25, 2015
Apr. 26, 2014
Apr. 25, 2015
Apr. 26, 2014
Oct. 25, 2014
Apr. 28, 2012
Apr. 25, 2015
Jan. 25, 2014
Jul. 26, 2014
Contingency [Line Items]                  
Purchase Commitments $ 4,495,000,000us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted   $ 4,495,000,000us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted       $ 4,495,000,000us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted   $ 4,169,000,000us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted
Liability for purchase commitments 153,000,000us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability   153,000,000us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability       153,000,000us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability   162,000,000us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
Future compensation expense & contingent consideration, maximum 366,000,000csco_Estimatedfuturecashcompensationexpensemaximumamount   366,000,000csco_Estimatedfuturecashcompensationexpensemaximumamount       366,000,000csco_Estimatedfuturecashcompensationexpensemaximumamount    
Commitments and contingencies                      
Volume of channel partner financing 6,300,000,000us-gaap_GrossTransactionVolume 5,800,000,000us-gaap_GrossTransactionVolume 19,000,000,000us-gaap_GrossTransactionVolume 17,900,000,000us-gaap_GrossTransactionVolume          
Balance of the channel partner financing subject to guarantees 1,200,000,000csco_ChannelPartnerFinancingSubjectToGuarantees   1,200,000,000csco_ChannelPartnerFinancingSubjectToGuarantees       1,200,000,000csco_ChannelPartnerFinancingSubjectToGuarantees   1,200,000,000csco_ChannelPartnerFinancingSubjectToGuarantees
Financing provided by third parties for leases and loans on which the Company has provided guarantees 22,000,000csco_ThirdPartiesFinancingArrangementsWithCompanyGuarantee 44,000,000csco_ThirdPartiesFinancingArrangementsWithCompanyGuarantee 87,000,000csco_ThirdPartiesFinancingArrangementsWithCompanyGuarantee 89,000,000csco_ThirdPartiesFinancingArrangementsWithCompanyGuarantee          
Cost of Goods Sold (Adjustment) 3,584,000,000us-gaap_CostOfGoodsSold 3,595,000,000us-gaap_CostOfGoodsSold 11,309,000,000us-gaap_CostOfGoodsSold 11,665,000,000us-gaap_CostOfGoodsSold          
Brazilian Authority Claim Of Import Tax Evasion By Importer Tax Portion 291,000,000csco_BrazilianAuthorityClaimOfImportTaxEvasionByImporterTaxPortion   291,000,000csco_BrazilianAuthorityClaimOfImportTaxEvasionByImporterTaxPortion       291,000,000csco_BrazilianAuthorityClaimOfImportTaxEvasionByImporterTaxPortion    
Brazilian Authority Claim Of Import Tax Evasion By Importer Interest Portion 1,100,000,000csco_BrazilianAuthorityClaimOfImportTaxEvasionByImporterInterestPortion   1,100,000,000csco_BrazilianAuthorityClaimOfImportTaxEvasionByImporterInterestPortion       1,100,000,000csco_BrazilianAuthorityClaimOfImportTaxEvasionByImporterInterestPortion    
Brazilian Authority Claim Of Import Tax Evasion By Importer Penalties Portion 1,300,000,000csco_BrazilianAuthorityClaimOfImportTaxEvasionByImporterPenaltiesPortion   1,300,000,000csco_BrazilianAuthorityClaimOfImportTaxEvasionByImporterPenaltiesPortion       1,300,000,000csco_BrazilianAuthorityClaimOfImportTaxEvasionByImporterPenaltiesPortion    
Minimum                  
Contingency [Line Items]                  
Warranty period for products, in days 90 days                
Channel partners revolving short-term financing payment term, in days 60 days                
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                
Insieme Networks Inc                  
Contingency [Line Items]                  
Variable Interest Entities Investment           100,000,000us-gaap_VariableInterestEntityFinancialOrOtherSupportAmount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_InsiemeNetworksIncMember
     
Ownership percentage as a result of investment         83.00%us-gaap_VariableInterestEntityOwnershipPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_InsiemeNetworksIncMember
       
Compensation expense related to acquisitions 51,000,000us-gaap_LaborAndRelatedExpense
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_InsiemeNetworksIncMember
52,000,000us-gaap_LaborAndRelatedExpense
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_InsiemeNetworksIncMember
155,000,000us-gaap_LaborAndRelatedExpense
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_InsiemeNetworksIncMember
363,000,000us-gaap_LaborAndRelatedExpense
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_InsiemeNetworksIncMember
    571,000,000us-gaap_LaborAndRelatedExpense
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_InsiemeNetworksIncMember
   
Insieme Networks Inc | Maximum | Including compensation that has been expensed through current reporting period [Member]                  
Contingency [Line Items]                  
Commitments and contingencies 843,000,000us-gaap_CommitmentsAndContingencies
/ us-gaap_NatureOfExpenseAxis
= csco_IncludingcompensationthathasbeenexpensedthroughcurrentreportingperiodMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_InsiemeNetworksIncMember
  843,000,000us-gaap_CommitmentsAndContingencies
/ us-gaap_NatureOfExpenseAxis
= csco_IncludingcompensationthathasbeenexpensedthroughcurrentreportingperiodMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_InsiemeNetworksIncMember
      843,000,000us-gaap_CommitmentsAndContingencies
/ us-gaap_NatureOfExpenseAxis
= csco_IncludingcompensationthathasbeenexpensedthroughcurrentreportingperiodMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_InsiemeNetworksIncMember
   
Investments In Privately Held Companies                  
Contingency [Line Items]                  
Commitments and contingencies 247,000,000us-gaap_CommitmentsAndContingencies
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_InvestmentsInPrivatelyHeldCompaniesMember
  247,000,000us-gaap_CommitmentsAndContingencies
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_InvestmentsInPrivatelyHeldCompaniesMember
      247,000,000us-gaap_CommitmentsAndContingencies
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_InvestmentsInPrivatelyHeldCompaniesMember
  255,000,000us-gaap_CommitmentsAndContingencies
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_InvestmentsInPrivatelyHeldCompaniesMember
Supplier Component Remediation Liability                  
Contingency [Line Items]                  
Commitments and contingencies 426,000,000us-gaap_CommitmentsAndContingencies
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_SupplierComponentRemediationLiabilityMember
  426,000,000us-gaap_CommitmentsAndContingencies
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_SupplierComponentRemediationLiabilityMember
      426,000,000us-gaap_CommitmentsAndContingencies
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_SupplierComponentRemediationLiabilityMember
63,000,000us-gaap_CommitmentsAndContingencies
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_SupplierComponentRemediationLiabilityMember
670,000,000us-gaap_CommitmentsAndContingencies
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_SupplierComponentRemediationLiabilityMember
Cost of Goods Sold (Adjustment) (164,000,000)us-gaap_CostOfGoodsSold
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_SupplierComponentRemediationLiabilityMember
            655,000,000us-gaap_CostOfGoodsSold
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_SupplierComponentRemediationLiabilityMember
 
Russia and the Commonwealth of Independent States [Member]                  
Contingency [Line Items]                  
Percentage of revenue, Percentage 2.00%csco_PercentageofrevenuePercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_RussiaandtheCommonwealthofIndependentStatesMember
               
Rockstar [Member]                  
Contingency [Line Items]                  
Cost of Goods Sold (Adjustment)         188,000,000us-gaap_CostOfGoodsSold
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_RockstarMember
       
Rockstar [Member] | Partially offset to $188 million accrued to Cost of goods sold in Q1'15                  
Contingency [Line Items]                  
Loss Contingency, Damages Awarded, Value $ 300,000,000us-gaap_LossContingencyDamagesAwardedValue
/ us-gaap_NatureOfExpenseAxis
= csco_Included188millionaccruedliabilitytoCostofSalesinQ115Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csco_RockstarMember