v2.4.1.9

Fair Value (Fair Value, Nonrecurring Measurement) (Details) (Level 3, USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 25, 2015 | Apr. 26, 2014 | Apr. 25, 2015 | Apr. 26, 2014
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items] |  |  |  |
Gains (losses) for assets measured on a nonrecurring basis | $ (23)us-gaap_AssetImpairmentCharges | $ 0 us-gaap_AssetImpairmentCharges | $ (82)us-gaap_AssetImpairmentCharges | $ (10)us-gaap_AssetImpairmentCharges
Assets Held-for-sale [Member] |  |  |  |
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items] |  |  |  |
Gains (losses) for assets measured on a nonrecurring basis | (5)us-gaap_AssetImpairmentCharges / us-gaap_FairValueByAssetClassAxis = us-gaap_AssetsHeldForSaleMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 0 us-gaap_AssetImpairmentCharges / us-gaap_FairValueByAssetClassAxis = us-gaap_AssetsHeldForSaleMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | (5)us-gaap_AssetImpairmentCharges / us-gaap_FairValueByAssetClassAxis = us-gaap_AssetsHeldForSaleMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 0 us-gaap_AssetImpairmentCharges / us-gaap_FairValueByAssetClassAxis = us-gaap_AssetsHeldForSaleMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Purchased Intangible Assets | Cost of Sales and Operating Expenses [Member] |  |  |  |
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items] |  |  |  |
Gains (losses) for assets measured on a nonrecurring basis | (1)us-gaap_AssetImpairmentCharges / us-gaap_FairValueByAssetClassAxis = csco_PurchasedIntangibleAssetsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_IncomeStatementLocationAxis = csco_CostofSalesandOperatingExpensesMember | 0 us-gaap_AssetImpairmentCharges / us-gaap_FairValueByAssetClassAxis = csco_PurchasedIntangibleAssetsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_IncomeStatementLocationAxis = csco_CostofSalesandOperatingExpensesMember | (57)us-gaap_AssetImpairmentCharges / us-gaap_FairValueByAssetClassAxis = csco_PurchasedIntangibleAssetsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_IncomeStatementLocationAxis = csco_CostofSalesandOperatingExpensesMember | 0 us-gaap_AssetImpairmentCharges / us-gaap_FairValueByAssetClassAxis = csco_PurchasedIntangibleAssetsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_IncomeStatementLocationAxis = csco_CostofSalesandOperatingExpensesMember
Investments In Privately Held Companies [Member] | Other Nonoperating Income (Expense) [Member] |  |  |  |
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items] |  |  |  |
Gains (losses) for assets measured on a nonrecurring basis | $ (17)us-gaap_AssetImpairmentCharges / us-gaap_FairValueByAssetClassAxis = csco_InvestmentsInPrivatelyHeldCompaniesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_IncomeStatementLocationAxis = us-gaap_OtherNonoperatingIncomeExpenseMember | $ 0 us-gaap_AssetImpairmentCharges / us-gaap_FairValueByAssetClassAxis = csco_InvestmentsInPrivatelyHeldCompaniesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_IncomeStatementLocationAxis = us-gaap_OtherNonoperatingIncomeExpenseMember | $ (20)us-gaap_AssetImpairmentCharges / us-gaap_FairValueByAssetClassAxis = csco_InvestmentsInPrivatelyHeldCompaniesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_IncomeStatementLocationAxis = us-gaap_OtherNonoperatingIncomeExpenseMember | $ (10)us-gaap_AssetImpairmentCharges / us-gaap_FairValueByAssetClassAxis = csco_InvestmentsInPrivatelyHeldCompaniesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_IncomeStatementLocationAxis = us-gaap_OtherNonoperatingIncomeExpenseMember

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 + Details
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