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Investment Income, Net (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Mar. 29, 2015
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Mar. 30, 2014
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Mar. 29, 2015
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Mar. 30, 2014
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| Investment Income, Net [Abstract] | ||||
| Interest and dividend income | $ 138us-gaap_InvestmentIncomeInterestAndDividend | $ 167us-gaap_InvestmentIncomeInterestAndDividend | $ 272us-gaap_InvestmentIncomeInterestAndDividend | $ 322us-gaap_InvestmentIncomeInterestAndDividend |
| Interest expense | (1)us-gaap_InterestExpense | (3)us-gaap_InterestExpense | (2)us-gaap_InterestExpense | (5)us-gaap_InterestExpense |
| Net realized gains on marketable securities | 108us-gaap_MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments | 243us-gaap_MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments | 264us-gaap_MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments | 371us-gaap_MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments |
| Net realized gains on other investments | 3us-gaap_GainLossOnSaleOfOtherInvestments | 0us-gaap_GainLossOnSaleOfOtherInvestments | 13us-gaap_GainLossOnSaleOfOtherInvestments | 17us-gaap_GainLossOnSaleOfOtherInvestments |
| Impairment losses on marketable securities | (27)us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount | (112)us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount | (89)us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount | (141)us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount |
| Impairment losses on other investments | (14)qcom_ImpairmentLossesOnOtherInvestments | (11)qcom_ImpairmentLossesOnOtherInvestments | (17)qcom_ImpairmentLossesOnOtherInvestments | (18)qcom_ImpairmentLossesOnOtherInvestments |
| Net gains on derivative instruments | 2us-gaap_DerivativeGainLossOnDerivativeNet | 0us-gaap_DerivativeGainLossOnDerivativeNet | 6us-gaap_DerivativeGainLossOnDerivativeNet | 4us-gaap_DerivativeGainLossOnDerivativeNet |
| Equity in net losses of investees | (9)us-gaap_IncomeLossFromEquityMethodInvestments | (4)us-gaap_IncomeLossFromEquityMethodInvestments | (13)us-gaap_IncomeLossFromEquityMethodInvestments | (5)us-gaap_IncomeLossFromEquityMethodInvestments |
| Net gains on deconsolidation of subsidiaries | 3us-gaap_DeconsolidationGainOrLossAmount | 2us-gaap_DeconsolidationGainOrLossAmount | 3us-gaap_DeconsolidationGainOrLossAmount | 1us-gaap_DeconsolidationGainOrLossAmount |
| Investment income, net | $ 203us-gaap_InvestmentIncomeNonoperating | $ 282us-gaap_InvestmentIncomeNonoperating | $ 437us-gaap_InvestmentIncomeNonoperating | $ 546us-gaap_InvestmentIncomeNonoperating |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
This element represents losses recognized for other-than-temporary impairments on investments accounted for under the cost and equity methods of accounting. No definition available.
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| X | ||||||||||
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- Definition
The amount of the gain (loss) recognized by the parent and included in its attributable portion of net income for the period due to deconsolidation of a subsidiary or derecognition of a group of assets. The gain (loss) recognized and included in the net income attributable to the parent for the period is generally computed as the difference between: (a) the aggregate of: (1) the fair value of any consideration received; (2) the fair value of any retained noncontrolling investment in the former subsidiary at the date the subsidiary was deconsolidated; and (3) the carrying amount of any noncontrolling interest in the former subsidiary (including any accumulated other comprehensive income attributable to the noncontrolling interest) at the date the subsidiary was deconsolidated and (b) the carrying amount of the former subsidiary's assets and liabilities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The difference between the book value and the sale price of other nonspecific investments. This element is used when other, more specific, elements are not appropriate. This element refers to the gain (loss) included in earnings. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount before accretion (amortization) of purchase discount (premium) of interest income and dividend income on nonoperating securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The aggregate amount of income from investments (for example, dividends) not considered a component of the entity's core operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This item represents the total realized gain (loss) included in earnings for the period as a result of selling marketable securities categorized as trading, available-for-sale, or held-to-maturity. No definition available.
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| X | ||||||||||
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- Definition
This element represents the amount of loss recognized for other than temporary impairments (OTTI) of investments in debt and equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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