v2.4.1.9

Investments (Additional Information) (Details) (USD $) | 3 Months Ended | 9 Months Ended | 69 Months Ended |  |
--- | --- | --- | --- | --- | ---
Apr. 25, 2015 | Apr. 26, 2014 | Apr. 25, 2015 | Apr. 26, 2014 | Apr. 25, 2015 | Jul. 26, 2014 | Oct. 25, 2014
Schedule of Investments [Line Items] |  |  |  |  |  |  |
Impairment charges on available-for-sale investments | $ 0 us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount | $ 0 us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount | $ 0 us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount | $ 11,000,000 us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount |  |  |
Other than temporary impairment, credit losses recognized in earnings, credit losses on debt securities held | 0 us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld |  | 0 us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld |  | 0 us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld |  |
Average daily balance of securities lending |  |  | 500,000,000 csco_AverageBalanceOfSecuritiesLending | 1,400,000,000 csco_AverageBalanceOfSecuritiesLending |  |  |
Fair Value Of Securities Received As Collateral That Can Be Resold Or RePledged Percentage |  |  | 102.00%csco_FairValueOfSecuritiesReceivedAsCollateralThatCanBeResoldOrRepledgedPercentage | 102.00%csco_FairValueOfSecuritiesReceivedAsCollateralThatCanBeResoldOrRepledgedPercentage |  |  |
Secured lending transactions outstanding | 0 csco_SecuredLendingTransactionsOutstanding |  | 0 csco_SecuredLendingTransactionsOutstanding |  | 0 csco_SecuredLendingTransactionsOutstanding | 0 csco_SecuredLendingTransactionsOutstanding |
Cost method investment carrying value | 312,000,000 us-gaap_CostMethodInvestments |  | 312,000,000 us-gaap_CostMethodInvestments |  | 312,000,000 us-gaap_CostMethodInvestments | 269,000,000 us-gaap_CostMethodInvestments |
VCE |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |
Cumulative gross investment in VCE | 716,000,000 us-gaap_EquityMethodInvestmentAggregateCost / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember |  | 716,000,000 us-gaap_EquityMethodInvestmentAggregateCost / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember |  | 716,000,000 us-gaap_EquityMethodInvestmentAggregateCost / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember |  |
Income (Loss) from Equity Method Investments | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember | 52,000,000 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember | 47,000,000 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember | 163,000,000 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember | 691,000,000 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember |  |
Proceeds from Sale of Equity Method Investments |  |  | 152,000,000 csco_Proceedsfromconvertiblenotesandaccruedinterest / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember |  |  |  |
Equity Method Investment, Ownership Percentage (in %) |  |  |  |  |  |  | 35.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember
Ownership interest in cost method investment (in %) | 10.00%csco_Ownershipinterestincostmethodinvestment / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember |  | 10.00%csco_Ownershipinterestincostmethodinvestment / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember |  | 10.00%csco_Ownershipinterestincostmethodinvestment / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember |  |
Cost method investment carrying value | 0 us-gaap_CostMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember |  | 0 us-gaap_CostMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember |  | 0 us-gaap_CostMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember |  |
Gains recognized related to restructuring of VCE |  |  | $ 126,000,000 us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csco_VCEMember |  |  |  |

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- Definition Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=29638308&loc=d3e40346-111594 + Details
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- Definition The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563 + Details
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