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Financial Instruments - Notional Amounts of Outstanding Derivative Instruments and Credit Risk Amounts Associated with Outstanding or Unsettled Derivative Instruments (Detail) - USD ($) $ in Millions | Jun. 25, 2016 | Sep. 26, 2015
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Derivatives Designated as Hedging Instruments | Foreign exchange contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | $ 37,843 | $ 70,054
Credit risk | 391 | 1,385
Derivatives Designated as Hedging Instruments | Interest rate contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | 23,050 | 18,750
Credit risk | 860 | 394
Not Designated as Hedging Instrument | Foreign exchange contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | 38,764 | 49,190
Credit risk | $ 115 | $ 109

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- Definition Credit risk amount of foreign currency derivative instruments designated as hedging instruments as of the balance sheet date. + References No definition available. + Details
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- Definition Gross exposure to potential accounting loss on outstanding or unsettled derivative instruments that if all counterparties failed to perform according to the terms of the contract. + References No definition available. + Details
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- Definition Credit risk amount of interest rate derivative instruments designated as hedging instruments as of the balance sheet date. + References No definition available. + Details
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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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