2.2.0.7 true Fair Value (Details) (USD $) 40801 - Disclosure - Fair Value (Details) true false In Millions false false 1 USD false false Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit12 Standard http://www.xbrl.org/2003/instance shares xbrli 0 Unit13 Standard http://www.xbrl.org/2003/instance pure xbrli 0 Unit14 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ false 2 USD false false Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit13 Standard http://www.xbrl.org/2003/instance pure xbrli 0 Unit12 Standard http://www.xbrl.org/2003/instance shares xbrli 0 Unit14 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ false 3 USD false false Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit12 Standard http://www.xbrl.org/2003/instance shares xbrli 0 Unit14 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ 9 Derivative assets 2 us-gaap_FairValueAssetsMeasuredOnRecurringBasisDerivativeFinancialInstrumentsAssets us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 true true false false 244000000 244 false false false 2 false false false false 0 0 false false false 3 true true false false 163000000 163 false false false xbrli:monetaryItemType monetary This element represents a certain statement of financial position asset caption which represents a class of assets, or which may include an individual asset, measured at fair value on a recurring basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph a false 10 Derivative liabilities 2 us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisDerivativeFinancialInstrumentsLiabilities us-gaap true credit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 17000000 17 false false false 2 false false false false 0 0 false false false 3 false true false false 19000000 19 false false false xbrli:monetaryItemType monetary This element represents a certain statement of financial position liability caption which represents a class of liabilities, or which may include an individual liability, measured at fair value on a recurring basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph a false 11 Total assets 2 csco_FairValueAssetsMeasuredOnRecurringBasisTotalAssets csco false debit instant Fair Value Assets Measured On Recurring Basis Total Assets false false false false false false false false false false false terselabel false 1 false true false false 37733000000 37733 false false false 2 false false false false 0 0 false false false 3 false true false false 38240000000 38240 false false false xbrli:monetaryItemType monetary Fair Value Assets Measured On Recurring Basis Total Assets No authoritative reference available. false 12 Total liabilities 2 csco_FairValueLiabilitiesMeasuredOnRecurringBasisTotal csco false credit instant Fair Value Liabilities Measured On Recurring Basis Total false false false false false false false false false false false terselabel false 1 false true false false 17000000 17 false false false 2 false false false false 0 0 false false false 3 false true false false 19000000 19 false false false xbrli:monetaryItemType monetary Fair Value Liabilities Measured On Recurring Basis Total No authoritative reference available. false 13 Beginning balance 2 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue us-gaap true debit instant No definition available. false false false false false false false false true false false periodstartlabel false 1 false true false false 152000000 152 false false false 2 false true false false 227000000 227 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c false 14 Included in other income (loss), net 2 csco_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherIncome csco false debit instant Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Income false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false true false false -6000000 -6 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Income No authoritative reference available. false 15 Included in operating expenses 2 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -1000000 -1 false false false 2 false true false false -2000000 -2 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in earnings or resulted in a change in net asset value. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c(1) false 16 Included in other comprehensive income 2 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncome us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -1000000 -1 false false false 2 false true false false 23000000 23 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in other comprehensive income (a separate component of shareholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c(1) false 17 Purchases, sales and maturities 2 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -6000000 -6 false false false 2 false true false false -63000000 -63 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary This element represents purchases, sales, issuances, and settlements (net) which have taken place during the period in relation to assets measured at fair value on a recurring basis using unobservable inputs (Level 3). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c(2) false 18 Ending balance 2 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue us-gaap true debit instant No definition available. false false false false false false false false false true false periodendlabel false 1 false true false false 144000000 144 false false false 2 false true false false 179000000 179 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c false 19 Losses attributable to assets still held 2 csco_FairValueAssetsMeasuredOnRecurringBasisLossesAttributableToAssetsStillHeld csco false debit duration Fair Value Assets Measured On Recurring Basis Losses Attributable To Assets Still Held false false false false false false false false false false false terselabel false 1 false true false false -1000000 -1 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Fair Value Assets Measured On Recurring Basis Losses Attributable To Assets Still Held No authoritative reference available. false 22 Available-for-sale Securities [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.cisco.com/taxonomy/role/disclosurefairvaluedetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false false 4 USD true false false false Available-for-sale Securities [Member] us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AvailableforsaleSecuritiesMember us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 5 USD true false false false Available-for-sale Securities [Member] us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AvailableforsaleSecuritiesMember us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 24 U.S. Government securities 2 csco_FairValueMeasuredOnRecurringBasisUSGovernmentSecurities csco false debit instant Fair Value Measured On Recurring Basis US Government Securities false false false false false false false false false false false terselabel false 1 false true false false 16418000000 16418 false false false 2 false false false false 0 0 false false false 3 false true false false 16612000000 16612 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis US Government Securities No authoritative reference available. false 25 U.S. Government agency securities 2 csco_FairValueMeasuredOnRecurringBasisUSGovernmentAgencySecurities csco false debit instant Fair Value Measured On Recurring Basis US Government Agency Securities false false false false false false false false false false false terselabel false 1 false true false false 12761000000 12761 false false false 2 false false false false 0 0 false false false 3 false true false false 13579000000 13579 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis US Government Agency Securities No authoritative reference available. false 26 Non-U.S. government and agency securities 2 csco_FairValueMeasuredOnRecurringBasisNonUSGovernmentAndAgencySecurities csco false debit instant Fair Value Measured On Recurring Basis Non-U.S. Government And Agency Securities false false false false false false false false false false false terselabel false 1 false true false false 1518000000 1518 false false false 2 false false false false 0 0 false false false 3 false true false false 1467000000 1467 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis Non-U.S. Government And Agency Securities No authoritative reference available. false 27 Corporate debt securities 2 csco_FairValueMeasuredOnRecurringBasisCorporateDebtSecurities csco false debit instant Fair Value Measured On Recurring Basis Corporate Debt Securities false false false false false false false false false false false terselabel false 1 false true false false 2951000000 2951 false false false 2 false false false false 0 0 false false false 3 false true false false 2222000000 2222 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis Corporate Debt Securities No authoritative reference available. false 28 Asset-backed securities 2 csco_FairValueMeasuredOnRecurringAssetBackedSecurities csco false debit instant Fair Value Measured On Recurring Asset Backed Securities false false false false false false false false false false false terselabel false 1 false true false false 142000000 142 false false false 2 false false false false 0 0 false false false 3 false true false false 149000000 149 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Asset Backed Securities No authoritative reference available. false 29 Publicly traded equity securities 2 csco_FairValueMeasuredOnRecurringPubliclyTradedEquitySecurities csco false debit instant Fair Value Measured On Recurring Basis Publicly Traded Equity Securities false false false false false false false false false false false terselabel false 1 false true false false 1339000000 1339 false false false 2 false false false false 0 0 false false false 3 false true false false 1251000000 1251 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis Publicly Traded Equity Securities No authoritative reference available. false 43 Available-for-sale Securities [Member] | Fair Value Inputs (Level 1) [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.cisco.com/taxonomy/role/disclosurefairvaluedetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false false 6 USD true false false false Available-for-sale Securities [Member] us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AvailableforsaleSecuritiesMember us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis explicitMember false false Fair Value Inputs (Level 1) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel1Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 7 USD true false false false Available-for-sale Securities [Member] us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AvailableforsaleSecuritiesMember us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis explicitMember false false Fair Value Inputs (Level 1) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel1Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 50 Publicly traded equity securities 2 csco_FairValueMeasuredOnRecurringPubliclyTradedEquitySecurities csco false debit instant Fair Value Measured On Recurring Basis Publicly Traded Equity Securities false false false false false false false false false false false terselabel false 1 false true false false 1339000000 1339 false false false 2 false false false false 0 0 false false false 3 false true false false 1251000000 1251 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis Publicly Traded Equity Securities No authoritative reference available. false 64 Available-for-sale Securities [Member] | Fair Value Inputs (Level 2) [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.cisco.com/taxonomy/role/disclosurefairvaluedetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false false 8 USD true false false false Available-for-sale Securities [Member] us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AvailableforsaleSecuritiesMember us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis explicitMember false false Fair Value Inputs (Level 2) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel2Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 9 USD true false false false Available-for-sale Securities [Member] us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AvailableforsaleSecuritiesMember us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis explicitMember false false Fair Value Inputs (Level 2) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel2Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 66 U.S. Government securities 2 csco_FairValueMeasuredOnRecurringBasisUSGovernmentSecurities csco false debit instant Fair Value Measured On Recurring Basis US Government Securities false false false false false false false false false false false terselabel false 1 false true false false 16418000000 16418 false false false 2 false false false false 0 0 false false false 3 false true false false 16612000000 16612 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis US Government Securities No authoritative reference available. false 67 U.S. Government agency securities 2 csco_FairValueMeasuredOnRecurringBasisUSGovernmentAgencySecurities csco false debit instant Fair Value Measured On Recurring Basis US Government Agency Securities false false false false false false false false false false false terselabel false 1 false true false false 12761000000 12761 false false false 2 false false false false 0 0 false false false 3 false true false false 13579000000 13579 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis US Government Agency Securities No authoritative reference available. false 68 Non-U.S. government and agency securities 2 csco_FairValueMeasuredOnRecurringBasisNonUSGovernmentAndAgencySecurities csco false debit instant Fair Value Measured On Recurring Basis Non-U.S. Government And Agency Securities false false false false false false false false false false false terselabel false 1 false true false false 1518000000 1518 false false false 2 false false false false 0 0 false false false 3 false true false false 1467000000 1467 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis Non-U.S. Government And Agency Securities No authoritative reference available. false 69 Corporate debt securities 2 csco_FairValueMeasuredOnRecurringBasisCorporateDebtSecurities csco false debit instant Fair Value Measured On Recurring Basis Corporate Debt Securities false false false false false false false false false false false terselabel false 1 false true false false 2951000000 2951 false false false 2 false false false false 0 0 false false false 3 false true false false 2222000000 2222 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis Corporate Debt Securities No authoritative reference available. false 85 Available-for-sale Securities [Member] | Fair Value Inputs (Level 3) [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.cisco.com/taxonomy/role/disclosurefairvaluedetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false false 10 USD true false false false Available-for-sale Securities [Member] us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AvailableforsaleSecuritiesMember us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis explicitMember false false Fair Value Inputs (Level 3) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel3Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 11 USD true false false false Available-for-sale Securities [Member] us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AvailableforsaleSecuritiesMember us-gaap_FairValueOptionQualitativeDisclosuresRelatedToElectionByEligibleItemOrGroupAxis explicitMember false false Fair Value Inputs (Level 3) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel3Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 91 Asset-backed securities 2 csco_FairValueMeasuredOnRecurringAssetBackedSecurities csco false debit instant Fair Value Measured On Recurring Asset Backed Securities false false false false false false false false false false false terselabel false 1 false true false false 142000000 142 false false false 2 false false false false 0 0 false false false 3 false true false false 149000000 149 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Asset Backed Securities No authoritative reference available. false 106 Derivative Assets [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.cisco.com/taxonomy/role/disclosurefairvaluedetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false false 12 USD true false false false Derivative Assets [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_DerivativeFinancialInstrumentsAssetsMember us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 13 USD true false false false Derivative Assets [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_DerivativeFinancialInstrumentsAssetsMember us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 118 Beginning balance 2 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue us-gaap true debit instant No definition available. false false false false false false false false true false false periodstartlabel false 1 false true false false 3000000 3 false false false 2 false true false false 4000000 4 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c false 120 Included in operating expenses 2 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -1000000 -1 false false false 2 false true false false -2000000 -2 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in earnings or resulted in a change in net asset value. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c(1) false 123 Ending balance 2 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue us-gaap true debit instant No definition available. false false false false false false false false false true false periodendlabel false 1 false true false false 2000000 2 false false false 2 false true false false 2000000 2 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c false 124 Losses attributable to assets still held 2 csco_FairValueAssetsMeasuredOnRecurringBasisLossesAttributableToAssetsStillHeld csco false debit duration Fair Value Assets Measured On Recurring Basis Losses Attributable To Assets Still Held false false false false false false false false false false false terselabel false 1 false true false false -1000000 -1 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Fair Value Assets Measured On Recurring Basis Losses Attributable To Assets Still Held No authoritative reference available. false 127 Asset-backed securities [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.cisco.com/taxonomy/role/disclosurefairvaluedetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false false 14 USD true false false false Asset-backed securities [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AssetBackedSecuritiesMember us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 15 USD true false false false Asset-backed securities [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AssetBackedSecuritiesMember us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 139 Beginning balance 2 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue us-gaap true debit instant No definition available. false false false false false false false false true false false periodstartlabel false 1 false true false false 149000000 149 false false false 2 false true false false 223000000 223 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c false 140 Included in other income (loss), net 2 csco_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherIncome csco false debit instant Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Income false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false true false false -6000000 -6 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Income No authoritative reference available. false 142 Included in other comprehensive income 2 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncome us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -1000000 -1 false false false 2 false true false false 23000000 23 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in other comprehensive income (a separate component of shareholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c(1) false 143 Purchases, sales and maturities 2 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -6000000 -6 false false false 2 false true false false -63000000 -63 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary This element represents purchases, sales, issuances, and settlements (net) which have taken place during the period in relation to assets measured at fair value on a recurring basis using unobservable inputs (Level 3). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c(2) false 144 Ending balance 2 us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue us-gaap true debit instant No definition available. false false false false false false false false false true false periodendlabel false 1 false true false false 142000000 142 false false false 2 false true false false 177000000 177 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c false 148 Cash Equivalents [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.cisco.com/taxonomy/role/disclosurefairvaluedetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false false 16 USD true false false false Cash Equivalents [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_CashEquivalentsMember us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 17 USD true false false false Cash Equivalents [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_CashEquivalentsMember us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 149 Money market funds 2 csco_FairValueMeasuredOnRecurringBasisMoneyMarketFunds csco false debit instant Fair Value Measured On Recurring Basis Money Market Funds false false false false false false false false false false false terselabel false 1 false true false false 2240000000 2240 false false false 2 false false false false 0 0 false false false 3 false true false false 2521000000 2521 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis Money Market Funds No authoritative reference available. false 150 U.S. Government securities 2 csco_FairValueMeasuredOnRecurringBasisUSGovernmentSecurities csco false debit instant Fair Value Measured On Recurring Basis US Government Securities false false false false false false false false false false false terselabel false 1 false true false false 70000000 70 false false false 2 false false false false 0 0 false false false 3 false true false false 235000000 235 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis US Government Securities No authoritative reference available. false 151 U.S. Government agency securities 2 csco_FairValueMeasuredOnRecurringBasisUSGovernmentAgencySecurities csco false debit instant Fair Value Measured On Recurring Basis US Government Agency Securities false false false false false false false false false false false terselabel false 1 false true false false 50000000 50 false false false 2 false false false false 0 0 false false false 3 false true false false 40000000 40 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis US Government Agency Securities No authoritative reference available. false 153 Corporate debt securities 2 csco_FairValueMeasuredOnRecurringBasisCorporateDebtSecurities csco false debit instant Fair Value Measured On Recurring Basis Corporate Debt Securities false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 1000000 1 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis Corporate Debt Securities No authoritative reference available. false 169 Cash Equivalents [Member] | Fair Value Inputs (Level 1) [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.cisco.com/taxonomy/role/disclosurefairvaluedetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false false 18 USD true false false false Cash Equivalents [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_CashEquivalentsMember us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis explicitMember false false Fair Value Inputs (Level 1) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel1Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 19 USD true false false false Cash Equivalents [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_CashEquivalentsMember us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis explicitMember false false Fair Value Inputs (Level 1) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel1Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 170 Money market funds 2 csco_FairValueMeasuredOnRecurringBasisMoneyMarketFunds csco false debit instant Fair Value Measured On Recurring Basis Money Market Funds false false false false false false false false false false false terselabel false 1 false true false false 2240000000 2240 false false false 2 false false false false 0 0 false false false 3 false true false false 2521000000 2521 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis Money Market Funds No authoritative reference available. false 190 Cash Equivalents [Member] | Fair Value Inputs (Level 2) [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.cisco.com/taxonomy/role/disclosurefairvaluedetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false false 20 USD true false false false Cash Equivalents [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_CashEquivalentsMember us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis explicitMember false false Fair Value Inputs (Level 2) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel2Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 21 USD true false false false Cash Equivalents [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_CashEquivalentsMember us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetTypeAxis explicitMember false false Fair Value Inputs (Level 2) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel2Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 192 U.S. Government securities 2 csco_FairValueMeasuredOnRecurringBasisUSGovernmentSecurities csco false debit instant Fair Value Measured On Recurring Basis US Government Securities false false false false false false false false false false false terselabel false 1 false true false false 70000000 70 false false false 2 false false false false 0 0 false false false 3 false true false false 235000000 235 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis US Government Securities No authoritative reference available. false 193 U.S. Government agency securities 2 csco_FairValueMeasuredOnRecurringBasisUSGovernmentAgencySecurities csco false debit instant Fair Value Measured On Recurring Basis US Government Agency Securities false false false false false false false false false false false terselabel false 1 false true false false 50000000 50 false false false 2 false false false false 0 0 false false false 3 false true false false 40000000 40 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis US Government Agency Securities No authoritative reference available. false 195 Corporate debt securities 2 csco_FairValueMeasuredOnRecurringBasisCorporateDebtSecurities csco false debit instant Fair Value Measured On Recurring Basis Corporate Debt Securities false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 1000000 1 false false false xbrli:monetaryItemType monetary Fair Value Measured On Recurring Basis Corporate Debt Securities No authoritative reference available. false 211 Net Carrying Value [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.cisco.com/taxonomy/role/disclosurefairvaluedetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false false 22 USD true false false false Net Carrying Value [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi csco_NetCarryingValueAsOfJuly252009Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 23 USD true false false false Net Carrying Value [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi csco_NetCarryingValueAsOfJuly252009Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 230 Investments in privately held companies 2 csco_InvestmentsInPrivatelyHeldCompanies csco false debit instant Investments in privately held companies false false false false false false false false false false false terselabel false 1 false true false false 9000000 9 false false false 2 false true false false 23000000 23 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Investments in privately held companies No authoritative reference available. false 231 Property held for sale 2 csco_PropertyHeldForSale csco false debit duration Property Held For Sale false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false true false false 4000000 4 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Property Held For Sale No authoritative reference available. false 232 Fair Value Inputs (Level 1) [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.cisco.com/taxonomy/role/disclosurefairvaluedetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false false 24 USD true false false false Fair Value Inputs (Level 1) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel1Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 25 USD true false false false Fair Value Inputs (Level 1) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel1Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 242 Total assets 2 csco_FairValueAssetsMeasuredOnRecurringBasisTotalAssets csco false debit instant Fair Value Assets Measured On Recurring Basis Total Assets false false false false false false false false false false false terselabel false 1 false true false false 3579000000 3579 false false false 2 false false false false 0 0 false false false 3 false true false false 3772000000 3772 false false false xbrli:monetaryItemType monetary Fair Value Assets Measured On Recurring Basis Total Assets No authoritative reference available. false 253 Fair Value Inputs (Level 2) [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.cisco.com/taxonomy/role/disclosurefairvaluedetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false false 26 USD true false false false Fair Value Inputs (Level 2) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel2Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 27 USD true false false false Fair Value Inputs (Level 2) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel2Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 261 Derivative assets 2 us-gaap_FairValueAssetsMeasuredOnRecurringBasisDerivativeFinancialInstrumentsAssets us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 242000000 242 false false false 2 false false false false 0 0 false false false 3 false true false false 160000000 160 false false false xbrli:monetaryItemType monetary This element represents a certain statement of financial position asset caption which represents a class of assets, or which may include an individual asset, measured at fair value on a recurring basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph a false 262 Derivative liabilities 2 us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisDerivativeFinancialInstrumentsLiabilities us-gaap true credit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 17000000 17 false false false 2 false false false false 0 0 false false false 3 false true false false 19000000 19 false false false xbrli:monetaryItemType monetary This element represents a certain statement of financial position liability caption which represents a class of liabilities, or which may include an individual liability, measured at fair value on a recurring basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph a false 263 Total assets 2 csco_FairValueAssetsMeasuredOnRecurringBasisTotalAssets csco false debit instant Fair Value Assets Measured On Recurring Basis Total Assets false false false false false false false false false false false terselabel false 1 false true false false 34010000000 34010 false false false 2 false false false false 0 0 false false false 3 false true false false 34316000000 34316 false false false xbrli:monetaryItemType monetary Fair Value Assets Measured On Recurring Basis Total Assets No authoritative reference available. false 264 Total liabilities 2 csco_FairValueLiabilitiesMeasuredOnRecurringBasisTotal csco false credit instant Fair Value Liabilities Measured On Recurring Basis Total false false false false false false false false false false false terselabel false 1 false true false false 17000000 17 false false false 2 false false false false 0 0 false false false 3 false true false false 19000000 19 false false false xbrli:monetaryItemType monetary Fair Value Liabilities Measured On Recurring Basis Total No authoritative reference available. false 274 Fair Value Inputs (Level 3) [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.cisco.com/taxonomy/role/disclosurefairvaluedetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false false 28 USD true false false false Fair Value Inputs (Level 3) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel3Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 29 USD true false false false Fair Value Inputs (Level 3) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel3Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 30 USD true false false false Fair Value Inputs (Level 3) [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_FairValueInputsLevel3Member us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 282 Derivative assets 2 us-gaap_FairValueAssetsMeasuredOnRecurringBasisDerivativeFinancialInstrumentsAssets us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 2000000 2 false false false 2 false false false false 0 0 false false false 3 false true false false 3000000 3 false false false xbrli:monetaryItemType monetary This element represents a certain statement of financial position asset caption which represents a class of assets, or which may include an individual asset, measured at fair value on a recurring basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph a false 284 Total assets 2 csco_FairValueAssetsMeasuredOnRecurringBasisTotalAssets csco false debit instant Fair Value Assets Measured On Recurring Basis Total Assets false false false false false false false false false false false terselabel false 1 false true false false 144000000 144 false false false 2 false false false false 0 0 false false false 3 false true false false 152000000 152 false false false xbrli:monetaryItemType monetary Fair Value Assets Measured On Recurring Basis Total Assets No authoritative reference available. false 293 Investments in privately held companies 2 csco_InvestmentsInPrivatelyHeldCompanies csco false debit instant Investments in privately held companies false false false false false false false false false false false terselabel false 1 false true false false 9000000 9 false false false 2 false true false false 23000000 23 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Investments in privately held companies No authoritative reference available. false 294 Property held for sale 2 csco_PropertyHeldForSale csco false debit duration Property Held For Sale false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false true false false 4000000 4 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Property Held For Sale No authoritative reference available. false 295 Total Losses Gains For Year End [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.cisco.com/taxonomy/role/disclosurefairvaluedetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false false 31 USD true false false false Total Losses Gains For Year End [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi csco_TotalLossesGainsForYearEndMember us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 32 USD true false false false Total Losses Gains For Year End [Member] us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis xbrldi http://xbrl.org/2006/xbrldi csco_TotalLossesGainsForYearEndMember us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis explicitMember Unit1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 314 Investments in privately held companies 2 csco_InvestmentsInPrivatelyHeldCompanies csco false debit instant Investments in privately held companies false false false false false false false false false false false terselabel false 1 false true false false -3000000 -3 false false false 2 false true false false -10000000 -10 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Investments in privately held companies No authoritative reference available. false 315 Property held for sale 2 csco_PropertyHeldForSale csco false debit duration Property Held For Sale false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 true true false false -2000000 -2 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Property Held For Sale No authoritative reference available. false 3 67 false Millions UnKnown UnKnown false true