v2.4.1.9

Comprehensive Income (Reclassification out of other comprehensive income) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
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Apr. 25, 2015 | Apr. 26, 2014 | Apr. 25, 2015 | Apr. 26, 2014
Net Unrealized Gains on Investments | Other income (loss), net |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Net unrealized gains on available-for-sale investments | $ 44 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_AvailableforsaleSecuritiesMember / us-gaap_NatureOfExpenseAxis = us-gaap_OtherExpenseMember | $ 69 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_AvailableforsaleSecuritiesMember / us-gaap_NatureOfExpenseAxis = us-gaap_OtherExpenseMember | $ 120 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_AvailableforsaleSecuritiesMember / us-gaap_NatureOfExpenseAxis = us-gaap_OtherExpenseMember | $ 234 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_AvailableforsaleSecuritiesMember / us-gaap_NatureOfExpenseAxis = us-gaap_OtherExpenseMember
Derivatives designated as cash flow hedging instruments: |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Total amounts reclassified out of AOCI | (64)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_CashFlowHedgingMember | 16 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_CashFlowHedgingMember | (94)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_CashFlowHedgingMember | 44 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_CashFlowHedgingMember
Derivatives designated as cash flow hedging instruments: | Operating expenses |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Total amounts reclassified out of AOCI | (50)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_CashFlowHedgingMember / us-gaap_NatureOfExpenseAxis = us-gaap_OperatingExpenseMember | 13 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_CashFlowHedgingMember / us-gaap_NatureOfExpenseAxis = us-gaap_OperatingExpenseMember | (74)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_CashFlowHedgingMember / us-gaap_NatureOfExpenseAxis = us-gaap_OperatingExpenseMember | 36 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_CashFlowHedgingMember / us-gaap_NatureOfExpenseAxis = us-gaap_OperatingExpenseMember
Derivatives designated as cash flow hedging instruments: | Cost of sales—service |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Total amounts reclassified out of AOCI | (14)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_CashFlowHedgingMember / us-gaap_NatureOfExpenseAxis = csco_CostOfSalesServiceMember | 3 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_CashFlowHedgingMember / us-gaap_NatureOfExpenseAxis = csco_CostOfSalesServiceMember | (20)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_CashFlowHedgingMember / us-gaap_NatureOfExpenseAxis = csco_CostOfSalesServiceMember | 8 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_CashFlowHedgingMember / us-gaap_NatureOfExpenseAxis = csco_CostOfSalesServiceMember
Total Cisco Shareholders’ Equity |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Total amounts reclassified out of AOCI | $ (20)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_ParentMember | $ 85 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_ParentMember | $ 26 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_ParentMember | $ 278 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax / us-gaap_InvestmentTypeAxis = us-gaap_ParentMember

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