v2.4.1.9

Borrowings (Schedule Of Long-Term Debt) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Apr. 25, 2015	Jul. 26, 2014
Debt Instrument [Line Items]
Total	$ 20,251us-gaap_DebtInstrumentCarryingAmount	$ 20,754us-gaap_DebtInstrumentCarryingAmount
Unaccreted discount	(59)us-gaap_DebtInstrumentUnamortizedDiscount	(63)us-gaap_DebtInstrumentUnamortizedDiscount
Hedge accounting fair value adjustments	308csco_HedgeAccountingAdjustmentOfCarryingAmountOfNotes	210csco_HedgeAccountingAdjustmentOfCarryingAmountOfNotes
Total	20,500us-gaap_LongTermDebt	20,901us-gaap_LongTermDebt
Current portion of long-term debt	3,914us-gaap_LongTermDebtCurrent	500us-gaap_LongTermDebtCurrent
Long-term debt	16,586us-gaap_LongTermDebtNoncurrent	20,401us-gaap_LongTermDebtNoncurrent
Floating Rate Notes 3-month Libor Plus 0.05% Due September 2015 [Member]
Debt Instrument [Line Items]
Maturity Date	Sep. 03, 2015	Sep. 03, 2015
Notes	850us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FloatingRateNotes3monthLiborPlus0.05DueSeptember2015Member	850us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FloatingRateNotes3monthLiborPlus0.05DueSeptember2015Member
Effective Rate	0.41%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FloatingRateNotes3monthLiborPlus0.05DueSeptember2015Member	0.35%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FloatingRateNotes3monthLiborPlus0.05DueSeptember2015Member
Three-month LIBOR plus this Percentage (in %)	0.05%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = csco_FloatingRateNotes3monthLiborPlus0.05DueSeptember2015Member	0.05%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = csco_FloatingRateNotes3monthLiborPlus0.05DueSeptember2015Member
Floating Rate Notes 3-month Libor Plus 0.28% Due March 2017 [Member]
Debt Instrument [Line Items]
Maturity Date	Mar. 03, 2017	Mar. 03, 2017
Notes	1,000us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FloatingRateNotes3monthLiborPlus0.28DueMarch2017Member	1,000us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FloatingRateNotes3monthLiborPlus0.28DueMarch2017Member
Effective Rate	0.61%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FloatingRateNotes3monthLiborPlus0.28DueMarch2017Member	0.56%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FloatingRateNotes3monthLiborPlus0.28DueMarch2017Member
Three-month LIBOR plus this Percentage (in %)	0.28%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = csco_FloatingRateNotes3monthLiborPlus0.28DueMarch2017Member	0.28%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = csco_FloatingRateNotes3monthLiborPlus0.28DueMarch2017Member
Floating rate notes 3-month Libor plus 0.5% due March 2019 [Member]
Debt Instrument [Line Items]
Maturity Date	Mar. 01, 2019	Mar. 01, 2019
Notes	500us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_Floatingratenotes3monthLiborplus0.5dueMarch2019Member	500us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_Floatingratenotes3monthLiborplus0.5dueMarch2019Member
Effective Rate	0.82%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_Floatingratenotes3monthLiborplus0.5dueMarch2019Member	0.78%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_Floatingratenotes3monthLiborplus0.5dueMarch2019Member
Three-month LIBOR plus this Percentage (in %)	0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = csco_Floatingratenotes3monthLiborplus0.5dueMarch2019Member	0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = csco_Floatingratenotes3monthLiborplus0.5dueMarch2019Member
Fixed-Rate Notes, 2.90%, Due November 2014
Debt Instrument [Line Items]
Maturity Date	Nov. 17, 2014	Nov. 17, 2014
Notes	0us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes2.90dueNovember2014Member	500us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes2.90dueNovember2014Member
Debt Instrument, Interest Rate, Stated Percentage		2.90%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes2.90dueNovember2014Member
Effective Rate		3.11%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes2.90dueNovember2014Member
Fixed-Rate Notes, 5.5%, Due February 2016
Debt Instrument [Line Items]
Maturity Date	Feb. 22, 2016	Feb. 22, 2016
Notes	3,000us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FIxedratenotes5.5dueFebruary2016Member	3,000us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FIxedratenotes5.5dueFebruary2016Member
Debt Instrument, Interest Rate, Stated Percentage	5.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FIxedratenotes5.5dueFebruary2016Member	5.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FIxedratenotes5.5dueFebruary2016Member
Effective Rate	3.06%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FIxedratenotes5.5dueFebruary2016Member	3.04%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FIxedratenotes5.5dueFebruary2016Member
Fixed-Rate Notes, 1.1%, Due March 2017
Debt Instrument [Line Items]
Maturity Date	Mar. 03, 2017	Mar. 03, 2017
Notes	2,400us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes1.1dueMarch2017Member	2,400us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes1.1dueMarch2017Member
Debt Instrument, Interest Rate, Stated Percentage	1.10%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes1.1dueMarch2017Member	1.10%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes1.1dueMarch2017Member
Effective Rate	0.58%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes1.1dueMarch2017Member	0.56%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes1.1dueMarch2017Member
Fixed-Rate Notes, 3.15%, Due March 2017
Debt Instrument [Line Items]
Maturity Date	Mar. 14, 2017	Mar. 14, 2017
Notes	750us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes3.15dueMarch2017Member	750us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes3.15dueMarch2017Member
Debt Instrument, Interest Rate, Stated Percentage	3.15%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes3.15dueMarch2017Member	3.15%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes3.15dueMarch2017Member
Effective Rate	0.83%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes3.15dueMarch2017Member	0.79%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_Fixedratenotes3.15dueMarch2017Member
Fixed-Rate Notes, 4.95%, Due February 2019
Debt Instrument [Line Items]
Maturity Date	Feb. 15, 2019	Feb. 15, 2019
Notes	2,000us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes4.95DueFebruary2019Member	2,000us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes4.95DueFebruary2019Member
Debt Instrument, Interest Rate, Stated Percentage	4.95%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes4.95DueFebruary2019Member	4.95%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes4.95DueFebruary2019Member
Effective Rate	4.69%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes4.95DueFebruary2019Member	4.69%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes4.95DueFebruary2019Member
Fixed-Rate Notes, 2.125%, Due March 2019
Debt Instrument [Line Items]
Maturity Date	Mar. 01, 2019	Mar. 01, 2019
Notes	1,750us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes2.125DueMarch2019Member	1,750us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes2.125DueMarch2019Member
Debt Instrument, Interest Rate, Stated Percentage	2.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes2.125DueMarch2019Member	2.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes2.125DueMarch2019Member
Effective Rate	0.79%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes2.125DueMarch2019Member	0.77%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes2.125DueMarch2019Member
Fixed-Rate Notes, 4.45%, Due January 2020
Debt Instrument [Line Items]
Maturity Date	Jan. 15, 2020	Jan. 15, 2020
Notes	2,500us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes4.45DueJanuary2020Member	2,500us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes4.45DueJanuary2020Member
Debt Instrument, Interest Rate, Stated Percentage	4.45%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes4.45DueJanuary2020Member	4.45%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes4.45DueJanuary2020Member
Effective Rate	3.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes4.45DueJanuary2020Member	2.98%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes4.45DueJanuary2020Member
Fixed-Rate Notes, 2.90%, Due March 2021
Debt Instrument [Line Items]
Maturity Date	Mar. 04, 2021	Mar. 04, 2021
Notes	500us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes2.9DueMarch2021Member	500us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes2.9DueMarch2021Member
Debt Instrument, Interest Rate, Stated Percentage	2.90%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes2.9DueMarch2021Member	2.90%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes2.9DueMarch2021Member
Effective Rate	0.95%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes2.9DueMarch2021Member	0.93%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes2.9DueMarch2021Member
Fixed-Rate Notes,3.625%, Due March 2024
Debt Instrument [Line Items]
Maturity Date	Mar. 04, 2024	Mar. 04, 2024
Notes	1,000us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes3.625DueMarch2024Member	1,000us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes3.625DueMarch2024Member
Debt Instrument, Interest Rate, Stated Percentage	3.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes3.625DueMarch2024Member	3.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes3.625DueMarch2024Member
Effective Rate	1.07%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes3.625DueMarch2024Member	1.05%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes3.625DueMarch2024Member
Fixed-Rate Notes, 5.9%, Due February 2039
Debt Instrument [Line Items]
Maturity Date	Feb. 15, 2039	Feb. 15, 2039
Notes	2,000us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes5.9DueFebruary2039Member	2,000us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes5.9DueFebruary2039Member
Debt Instrument, Interest Rate, Stated Percentage	5.90%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes5.9DueFebruary2039Member	5.90%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes5.9DueFebruary2039Member
Effective Rate	6.11%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes5.9DueFebruary2039Member	6.11%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes5.9DueFebruary2039Member
Fixed-Rate Notes, 5.5%, Due January 2040
Debt Instrument [Line Items]
Maturity Date	Jan. 15, 2040	Jan. 15, 2040
Notes	2,000us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes5.5DueJanuary2040Member	2,000us-gaap_SeniorNotes / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes5.5DueJanuary2040Member
Debt Instrument, Interest Rate, Stated Percentage	5.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes5.5DueJanuary2040Member	5.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes5.5DueJanuary2040Member
Effective Rate	5.67%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes5.5DueJanuary2040Member	5.67%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = csco_FixedRateNotes5.5DueJanuary2040Member
Other long-term debt
Debt Instrument [Line Items]
Other long-term debt	$ 1us-gaap_OtherLongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember	$ 4us-gaap_OtherLongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember
Effective Rate	2.08%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember	2.39%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember

X

- Definition

Hedge accounting adjustment of the carrying amount of the 2011 and 2016 Notes

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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No definition available.

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- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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