Financing Receivables and Operating Leases (Schedule Of Aging Analysis Of Financing Receivables) (Details) (USD $) In Millions, unless otherwise specified	Apr. 25, 2015	Jul. 26, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 days past due (Includes billed and unbilled)	$ 213	$ 334
61-90 days past due (includes billed and unbilled)	151	297
90 days or over past due ( includes billed and unbilled)	503	449
Total Past Due	867	1,080
Current	7,020	7,107
Total	7,887	8,187
Nonaccrual Financing Receivables	99	79
Impaired Financing Receivables	79	69
Lease Receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 days past due (Includes billed and unbilled)	102	63
61-90 days past due (includes billed and unbilled)	48	46
90 days or over past due ( includes billed and unbilled)	138	202
Total Past Due	288	311
Current	2,798	2,983
Total	3,086	3,294
Nonaccrual Financing Receivables	38	48
Impaired Financing Receivables	38	41
Loan Receivables
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 days past due (Includes billed and unbilled)	12	3
61-90 days past due (includes billed and unbilled)	15	21
90 days or over past due ( includes billed and unbilled)	56	27
Total Past Due	83	51
Current	1,637	1,632
Total	1,720	1,683
Nonaccrual Financing Receivables	29	19
Impaired Financing Receivables	29	19
Financed Service Contracts and Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
31-60 days past due (Includes billed and unbilled)	99	268
61-90 days past due (includes billed and unbilled)	88	230
90 days or over past due ( includes billed and unbilled)	309	220
Total Past Due	496	718
Current	2,585	2,492
Total	3,081	3,210
Nonaccrual Financing Receivables	32	12
Impaired Financing Receivables	$ 12	$ 9

FInancing receivables net of unearned income

No definition available.

Name:	csco_FInancingreceivablesnetofunearnedincome
Namespace Prefix:	csco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Financing receivables that are less than 60 days past due but more than 29 days past due.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7A

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Financing receivables that are less than 90 days past due but more than 59 days past due.

+ References

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Financing receivables that are current.

+ References

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Financing receivables that are equal to or greater than 90 days past due.

+ References

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Recorded Investment in financing receivables that are past due at the balance sheet date.

+ References

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentPastDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953550-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=csco_FinancedServiceContractsAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=csco_LeaseReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_LoansReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: