v2.4.1.9

Financing Receivables and Operating Leases (Summary Of Allowances For Credit Loss And Related Financing Receivables) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Apr. 25, 2015		Apr. 26, 2014		Apr. 25, 2015		Apr. 26, 2014		Jul. 26, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit loss as of	$ 375us-gaap_FinancingReceivableAllowanceForCreditLosses		$ 374us-gaap_FinancingReceivableAllowanceForCreditLosses		$ 349us-gaap_FinancingReceivableAllowanceForCreditLosses		$ 344us-gaap_FinancingReceivableAllowanceForCreditLosses
Provisions	(11)us-gaap_ProvisionForLoanLeaseAndOtherLosses		(18)us-gaap_ProvisionForLoanLeaseAndOtherLosses		31us-gaap_ProvisionForLoanLeaseAndOtherLosses		14us-gaap_ProvisionForLoanLeaseAndOtherLosses
Recoveries, net			2us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery				3us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
Write-offs, net	(1)us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs				(5)us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Foreign exchange and other	(4)us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation		2us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation		(16)us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation		(1)us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation
Allowance for credit loss as of	359us-gaap_FinancingReceivableAllowanceForCreditLosses		360us-gaap_FinancingReceivableAllowanceForCreditLosses		359us-gaap_FinancingReceivableAllowanceForCreditLosses		360us-gaap_FinancingReceivableAllowanceForCreditLosses
Total financing receivables before allowance for credit loss	8,113us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome	[1]	7,968us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome	[1]	8,113us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome	[1]	7,968us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome	[1]	8,420us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Lease Receivables
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit loss as of	250us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember		254us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember		233us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember		238us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember
Provisions	(4)us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember		(6)us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember		25us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember		9us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember
Write-offs, net	(1)us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember		(1)us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember		(6)us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember		0us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember
Foreign exchange and other	(3)us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember		2us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember		(10)us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember		2us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember
Allowance for credit loss as of	242us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember		249us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember		242us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember		249us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember
Total financing receivables before allowance for credit loss	3,312us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember	[1]	3,537us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember	[1]	3,312us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember	[1]	3,537us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_LeaseReceivablesMember	[1]
Loan Receivables
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit loss as of	85us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember		98us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember		98us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember		86us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember
Provisions	(5)us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember		(10)us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember		(15)us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember		5us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember
Recoveries, net	0us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember		4us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember		1us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember		4us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember
Foreign exchange and other	0us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember		0us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember		(4)us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember		(3)us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember
Allowance for credit loss as of	80us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember		92us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember		80us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember		92us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember
Total financing receivables before allowance for credit loss	1,720us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember	[1]	1,621us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember	[1]	1,720us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember	[1]	1,621us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_LoansReceivableMember	[1]
Financed Service Contracts and Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit loss as of	40us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember		22us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember		18us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember		20us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember
Provisions	(2)us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember		(2)us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember		21us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember		0us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember
Write-offs, net	0us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember		(1)us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember		0us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember		(1)us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember
Foreign exchange and other	(1)us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember		0us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember		(2)us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember		0us-gaap_AllowanceForLoanAndLeaseLossesForeignCurrencyTranslation / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember
Allowance for credit loss as of	37us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember		19us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember		37us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember		19us-gaap_FinancingReceivableAllowanceForCreditLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember
Total financing receivables before allowance for credit loss	$ 3,081us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember	[1]	$ 2,810us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember	[1]	$ 3,081us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember	[1]	$ 2,810us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = csco_FinancedServiceContractsAndOtherMember	[1]
[1] Total financing receivables before allowance for credit loss.

X

- Definition

Amount of gain (loss) from converting allowance reserve for credit loss to currency of reporting entity from amount denominated or measured in a different currency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(d))

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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-Paragraph 7

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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