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Financial Instruments - Notional Amounts and Credit Risk Amounts Associated with Derivative Instruments (Details) - USD ($) $ in Millions | Sep. 28, 2019 | Sep. 29, 2018
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Derivatives designated as accounting hedges | Foreign exchange contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | $ 61,795 | $ 65,368
Derivative, credit risk amount | 1,798 | 1,015
Derivatives designated as accounting hedges | Interest rate contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | 31,250 | 33,250
Derivative, credit risk amount | 685 | 0
Derivatives not designated as accounting hedges | Foreign exchange contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | 76,868 | 63,062
Derivative, credit risk amount | $ 323 | $ 259

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- Definition Gross exposure to potential accounting loss on outstanding or unsettled derivative instruments that would arise if all counterparties failed to perform according to the terms of the contract. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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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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Balance Type: | na
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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 + Details
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- Details
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Balance Type: |
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- Details
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- Details
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- Details
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Data Type: | na
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