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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 12 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|---|
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Mar. 29, 2015
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Dec. 28, 2014
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Sep. 28, 2014
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Sep. 27, 2015
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Mar. 29, 2015
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| Income Tax Disclosure [Abstract] | |||||
| Effective income tax rate for continuing operations | 32.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 14.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations | |||
| Tax benefits from foreign income taxed at rates lower than rates in the United States | 20.00%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential | ||||
| Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | $ 61us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities | ||||
| Tax Benefit Recognized In Period Related To Prior Period Attributable To Research and Development Tax Credit | 101qcom_TaxBenefitRecognizedInPeriodRelatedToPriorPeriodAttributableToResearchTaxCredit | ||||
| Scenario, Forecast [Member] | |||||
| Income Tax Disclosure [Abstract] | |||||
| Effective income tax rate for continuing operations |
21.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember |
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| Tax benefits from foreign income taxed at rates lower than rates in the United States |
17.00%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember |
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| United States of America, Dollars | |||||
| Income Tax Disclosure [Abstract] | |||||
| Resolution of governmental investigation, Amount |
975qcom_ResolutionofgovernmentalinvestigationAmount / us-gaap_CurrencyAxis = currency_USD |
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| United States of America, Dollars | UnallocatedOtherIncome [Member] | |||||
| Income Tax Disclosure [Abstract] | |||||
| Resolution of governmental investigation, Amount |
$ 975qcom_ResolutionofgovernmentalinvestigationAmount / us-gaap_CurrencyAxis = currency_USD / us-gaap_StatementBusinessSegmentsAxis = qcom_UnallocatedOtherIncomeMember |
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| X | ||||||||||
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- Definition
Amount of fine imposed by a government agency on resolution of matters investigated. No definition available.
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| X | ||||||||||
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- Definition
Tax benefit recognized in the current period related to a prior period due to retroactive extension of the U.S. federal research and development tax credit. No definition available.
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| X | ||||||||||
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- Definition
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Details
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