v3.10.0.1

Financing Receivables and Operating Leases (Additional Information) (Details) $ in Millions | 3 Months Ended |
--- | --- | ---
Oct. 27, 2018 USD ($) rating | Jul. 28, 2018 USD ($)
Financing Receivables And Guarantees [Line Items] |  |
Average lease term | 4 years |
Threshold for past due receivables | 31 days |
Unbilled or current financing receivables included in greater than 91 days plus past due | $ | $ 474 | $ 503
Financing receivable, 91 days past due and still accruing | $ | $ 234 | $ 182
Investment credit risk ratings range lowest (rating) | 1 |
Highest rating when receivables are deemed impaired (rating) | 10 |
Rating at or higher when receivables deemed impaired (rating) | 8 |
Maximum |  |
Financing Receivables And Guarantees [Line Items] |  |
Loan receivables term | 3 years |
Maximum | Financed Service Contracts |  |
Financing Receivables And Guarantees [Line Items] |  |
Financed service contracts term | 3 years |
Minimum | Financed Service Contracts |  |
Financing Receivables And Guarantees [Line Items] |  |
Financed service contracts term | 1 year |

X
- Definition Average term of lease arrangements. + References No definition available. + Details
Name: | csco_AverageTermOfLeaseArrangements
Namespace Prefix: | csco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financing Receivables And Guarantees [Line Items] + References No definition available. + Details
Name: | csco_FinancingReceivablesAndGuaranteesLineItems
Namespace Prefix: | csco_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Investment Credit Risk Ratings Range Highest + References No definition available. + Details
Name: | csco_InvestmentCreditRiskRatingsRangeHighest
Namespace Prefix: | csco_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Investment Credit Risk Ratings Range Lowest + References No definition available. + Details
Name: | csco_InvestmentCreditRiskRatingsRangeLowest
Namespace Prefix: | csco_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Rating at or higher when receivables deemed impaired + References No definition available. + Details
Name: | csco_Ratingatorhigherwhenreceivablesdeemedimpaired
Namespace Prefix: | csco_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Service Agreement Term + References No definition available. + Details
Name: | csco_ServiceAgreementTerm
Namespace Prefix: | csco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Term of loan receivable arrangement. + References No definition available. + Details
Name: | csco_TermOfLoanReceivableArrangement
Namespace Prefix: | csco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Threshold for past due receivables + References No definition available. + Details
Name: | csco_Thresholdforpastduereceivables
Namespace Prefix: | csco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Unbilled or current in greater than ninety days past due. + References No definition available. + Details
Name: | csco_UnbilledOrCurrentInGreaterThanNinetyDaysPastDue
Namespace Prefix: | csco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=csco_FinancedServiceContractsAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |