1.0.0.3 false CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions false 1 $ false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 u001 Standard http://www.xbrl.org/2003/instance shares xbrli 0 u002 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 false 2 $ false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 u001 Standard http://www.xbrl.org/2003/instance shares xbrli 0 u002 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 3 1 us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 4 2 us-gaap_NetIncomeLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 true true 841000000 841 false false 2 true true 341000000 341 false false No definition available. No authoritative reference available. false 5 2 us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 6 3 us-gaap_DepreciationAndAmortization us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 162000000 162 false false 2 false true 152000000 152 false false No definition available. No authoritative reference available. false 7 3 qcom_RevenuesRelatedToNonMonetaryExchanges qcom false na duration monetary The amount of revenue recognized during the period related to nonmonetary consideration received. As a noncash item, it is... false false false false false false false false false 1 false true -37000000 -37 false false 2 false true -29000000 -29 false false The amount of revenue recognized during the period related to nonmonetary consideration received. As a noncash item, it is added to net income when calculating cash provided by (used in) operations using the indirect method. No authoritative reference available. false 8 3 us-gaap_DeferredIncomeTaxExpenseBenefit us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 32000000 32 false false 2 false true 45000000 45 false false No definition available. No authoritative reference available. false 9 3 us-gaap_ShareBasedCompensation us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 151000000 151 false false 2 false true 145000000 145 false false No definition available. No authoritative reference available. false 10 3 us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -13000000 -13 false false 2 false true -16000000 -16 false false No definition available. No authoritative reference available. false 11 3 us-gaap_GainLossOnSaleOfInvestments us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -102000000 -102 false false 2 false true 33000000 33 false false No definition available. No authoritative reference available. false 12 3 us-gaap_ImpairmentOfInvestments us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 57000000 57 false false 2 false true 392000000 392 false false No definition available. No authoritative reference available. false 13 3 us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesOther us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 4000000 4 false false 2 false true -14000000 -14 false false No definition available. No authoritative reference available. false 14 2 us-gaap_IncreaseDecreaseInOperatingCapitalAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 15 3 us-gaap_IncreaseDecreaseInReceivables us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 87000000 87 false false 2 false true 2716000000 2716 false false No definition available. No authoritative reference available. false 16 3 us-gaap_IncreaseDecreaseInInventories us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 101000000 101 false false 2 false true 65000000 65 false false No definition available. No authoritative reference available. false 17 3 us-gaap_IncreaseDecreaseInOtherOperatingAssets us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -32000000 -32 false false 2 false true -19000000 -19 false false No definition available. No authoritative reference available. false 18 3 us-gaap_IncreaseDecreaseInAccountsPayableTrade us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -226000000 -226 false false 2 false true -192000000 -192 false false No definition available. No authoritative reference available. false 19 3 qcom_IncreaseDecreaseInPayrollBenefitsAndOtherLiabilities qcom false na duration monetary The net change during the reporting period in the aggregate amount of pension, postretirement, workers' compensation, and... false false false false false false false false false 1 false true -124000000 -124 false false 2 false true -54000000 -54 false false The net change during the reporting period in the aggregate amount of pension, postretirement, workers' compensation, and other similar obligations and liabilities combined with the net change during the reporting period in other expenses incurred but not yet paid. This element should be used when there is no other more specific or appropriate element. No authoritative reference available. false 20 3 us-gaap_IncreaseDecreaseInDeferredRevenue us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 338000000 338 false false 2 false true -64000000 -64 false false No definition available. No authoritative reference available. false 21 2 us-gaap_NetCashProvidedByUsedInOperatingActivities us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true 1239000000 1239 false false 2 false true 3501000000 3501 false false No definition available. No authoritative reference available. true 22 1 us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 23 2 us-gaap_PaymentsToAcquireProductiveAssets us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -88000000 -88 false false 2 false true -234000000 -234 false false No definition available. No authoritative reference available. false 24 2 us-gaap_PaymentsToAcquireAvailableForSaleSecurities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -2098000000 -2098 false false 2 false true -2586000000 -2586 false false No definition available. No authoritative reference available. false 25 2 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 2013000000 2013 false false 2 false true 1373000000 1373 false false No definition available. No authoritative reference available. false 26 2 us-gaap_ProceedsFromCollectionOfOtherReceivables us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 8000000 8 false false 2 false true 202000000 202 false false No definition available. No authoritative reference available. false 27 2 qcom_OtherInvestmentsAndAcquisitionsNetOfCashAcquired qcom false debit duration monetary The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase and the cash... false false false false false false false false false 1 false true -6000000 -6 false false 2 false true -14000000 -14 false false The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase and the cash outflow associated with other investments held by the entity for investment purposes not otherwise defined in the taxonomy. No authoritative reference available. false 28 2 qcom_ChangeInCollateralHeldUnderSecuritiesLending qcom false na duration monetary The net change during the period in the carrying amount (fair value) of securities held that had been pledged by... false false false false false false false false false 1 false true 0 0 false false 2 false true 162000000 162 false false The net change during the period in the carrying amount (fair value) of securities held that had been pledged by counterparties under financing and lending arrangements, pursuant to which the entity has the right by agreement or custom to sell ore repledge such securities. No authoritative reference available. false 29 2 us-gaap_PaymentsForProceedsFromOtherInvestingActivities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -1000000 -1 false false 2 false true -4000000 -4 false false No definition available. No authoritative reference available. false 30 2 us-gaap_NetCashProvidedByUsedInInvestingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -172000000 -172 false false 2 false true -1101000000 -1101 false false No definition available. No authoritative reference available. true 31 1 us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 32 2 us-gaap_ProceedsFromIssuanceOfCommonStock us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 152000000 152 false false 2 false true 26000000 26 false false No definition available. No authoritative reference available. false 33 2 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 13000000 13 false false 2 false true 16000000 16 false false No definition available. No authoritative reference available. false 34 2 us-gaap_PaymentsForRepurchaseOfCommonStock us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 0 0 false false 2 false true -285000000 -285 false false No definition available. No authoritative reference available. false 35 2 us-gaap_PaymentsOfDividends us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -284000000 -284 false false 2 false true 0 0 false false No definition available. No authoritative reference available. false 36 2 qcom_ChangeInObligationUnderSecuritiesLending qcom false na duration monetary The change in fair value of collateral received by the entity associated with securities borrowed that must be returned if... false false false false false false false false false 1 false true 0 0 false false 2 false true -162000000 -162 false false The change in fair value of collateral received by the entity associated with securities borrowed that must be returned if the counterparty fulfills its obligations. The collateral appears on the balance sheet as a liability and has a corresponding asset that appears on the balance sheet called collateral held under securities lending. No authoritative reference available. false 37 2 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -1000000 -1 false false 2 false true -1000000 -1 false false No definition available. No authoritative reference available. false 38 2 us-gaap_NetCashProvidedByUsedInFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -120000000 -120 false false 2 false true -406000000 -406 false false No definition available. No authoritative reference available. true 39 1 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -4000000 -4 false false 2 false true -8000000 -8 false false No definition available. No authoritative reference available. false 40 1 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true 943000000 943 false false 2 false true 1986000000 1986 false false No definition available. No authoritative reference available. true 41 1 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false true false false 1 false true 2717000000 2717 false false 2 false true 1840000000 1840 false false No definition available. No authoritative reference available. false 42 1 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false false true false 1 true true 3660000000 3660 false false 2 true true 3826000000 3826 false false No definition available. No authoritative reference available. false false 2 40 false Millions UnKnown UnKnown false true