1.0.0.3 false CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (USD $) In Millions, except Per Share data 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_RevenuesAbstract 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 qcom_EquipmentAndServices qcom false credit duration monetary Aggregate revenue during the period from equipment and services rendered in the normal course of business, after deducting... false false false false false false false false false 1 true true 1663000000 1663 false false 2 true true 1423000000 1423 false false Aggregate revenue during the period from equipment and services rendered in the normal course of business, after deducting allowances and discounts and the aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. No authoritative reference available. false 5 2 qcom_LicensingAndRoyaltyFees qcom false credit duration monetary Revenue earned during the period relating to consideration received from another party for the right to use, but not own,... false false false false false false false false false 1 false true 1007000000 1007 false false 2 false true 1094000000 1094 false false Revenue earned during the period relating to consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity and revenue earned during the period from the leasing or otherwise lending to a third party the entity's rights or title to certain property. Royalty revenue is derived from a percentage or stated amount of sales proceeds or revenue generated by the third party using the entity's property. Examples of property from which royalties may be derived include patents and oil and mineral rights. No authoritative reference available. false 6 2 us-gaap_Revenues us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 2670000000 2670 false false 2 false true 2517000000 2517 false false No definition available. No authoritative reference available. true 7 1 qcom_OperatingExpenseTotalAbstract qcom false na duration string Generally recurring costs associated with normal operations includes cost of sales or services, research and... false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false Generally recurring costs associated with normal operations includes cost of sales or services, research and development expense and selling, general and administrative expense. false 8 2 us-gaap_CostOfRevenue us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 816000000 816 false false 2 false true 755000000 755 false false No definition available. No authoritative reference available. false 9 2 us-gaap_ResearchAndDevelopmentExpense us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 596000000 596 false false 2 false true 604000000 604 false false No definition available. No authoritative reference available. false 10 2 us-gaap_SellingGeneralAndAdministrativeExpense us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 379000000 379 false false 2 false true 413000000 413 false false No definition available. No authoritative reference available. false 11 2 qcom_TotalOperatingExpenses qcom false debit duration monetary Generally recurring costs associated with normal operations includes cost of sales or services, research and development... false false false false false false false false false 1 false true 1791000000 1791 false false 2 false true 1772000000 1772 false false Generally recurring costs associated with normal operations includes cost of sales or services, research and development expense and selling, general and administrative expense. No authoritative reference available. true 12 1 us-gaap_OperatingIncomeLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 879000000 879 false false 2 false true 745000000 745 false false No definition available. No authoritative reference available. true 13 1 qcom_InvestmentIncomeNetIncluding qcom false credit duration monetary This item represents investment income derived from investments in debt and equity securities consisting of interest income... false false false false false false false false false 1 false true 173000000 173 false false 2 false true -294000000 -294 false false This item represents investment income derived from investments in debt and equity securities consisting of interest income earned from investments in debt securities and on cash and cash equivalents, dividend income from investments in equity securities, income or expense derived from the amortization of investment related discounts or premiums, respectively, net of related investment expenses, realized gains or losses on the sale or holding of investments in debt and equity securities required to be included in earnings for the period, other than temporary losses related to investments in debt and equity securities, interest expense, gains or losses on derivative instruments, and equity in earnings or losses of investees. No authoritative reference available. false 14 1 qcom_IncomeBeforeIncomeTaxes qcom false credit duration monetary Sum of operating income and nonoperating income (expense) before income taxes incuding income (loss) from equity method... false false false false false false false false false 1 false true 1052000000 1052 false false 2 false true 451000000 451 false false Sum of operating income and nonoperating income (expense) before income taxes incuding income (loss) from equity method investments. No authoritative reference available. true 15 1 us-gaap_IncomeTaxExpenseBenefit us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -211000000 -211 false false 2 false true -110000000 -110 false false No definition available. No authoritative reference available. false 16 1 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 17 1 us-gaap_EarningsPerShareBasic us-gaap true na duration decimal No definition available. false false false false false false false false true 1 true true 0.5 0.5 false false 2 true true 0.21 0.21 false false No definition available. No authoritative reference available. false 18 1 us-gaap_EarningsPerShareDiluted us-gaap true na duration decimal No definition available. false false false false false false false false true 1 true true 0.5 0.5 false false 2 true true 0.2 0.2 false false No definition available. No authoritative reference available. false 19 1 qcom_SharesUsedInPerShareCalculations qcom false 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 20 2 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic us-gaap true na duration shares No definition available. false false false false false false false false false 1 false true 1672000000 1672 false false 2 false true 1653000000 1653 false false No definition available. No authoritative reference available. false 21 2 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding us-gaap true na duration shares No definition available. false false false false false false false false false 1 false true 1691000000 1691 false false 2 false true 1667000000 1667 false false No definition available. No authoritative reference available. false 22 1 us-gaap_CommonStockDividendsPerShareDeclared us-gaap true na duration decimal No definition available. false false false false false false false false true 1 true true 0.17 0.17 false false 2 true true 0.16 0.16 false false No definition available. No authoritative reference available. false false 2 20 false Millions Millions Hundreds false true