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Derivative Financial Instruments (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 03, 2020 | Sep. 28, 2019 | Sep. 29, 2018
Derivative [Line Items] |  |  |
Maximum Length Of Time Hedged Anticipated Transactions | 18 months |  |
Cost of Sales | $ 37,801 | $ 37,383 | $ 34,956
Interest and Debt Expense | 485 | 462 | 350
Other Nonoperating Income (Expense) | 131 | 55 | 56
Commodity Contracts [Member] |  |  |
Derivative [Line Items] |  |  |
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | 1 |  |
Treasury Lock [Member] |  |  |
Derivative [Line Items] |  |  |
Cash Flow Hedge Gain (Loss) to be Reclassified Over Life of Forecasted Fixed-Rate Debt | (16) |  |
Cash Flow Hedging [Member] |  |  |
Derivative [Line Items] |  |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | (17) | (39) | (20)
Cash Flow Hedging [Member] | Commodity Contracts [Member] |  |  |
Derivative [Line Items] |  |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | (17) | (15) | (21)
Cash Flow Hedging [Member] | Interest Rate Contract [Member] |  |  |
Derivative [Line Items] |  |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | 0 | (24) | 1
Fair Value Hedging [Member] |  |  |
Derivative [Line Items] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | 6 | (19) | 4
Sales [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] |  |  |
Derivative [Line Items] |  |  |
Gain/(Loss) Recognized in Earnings | 0 | (23) | 18
Cost of Sales [Member] |  |  |
Derivative [Line Items] |  |  |
Gain/(Loss) Recognized in Earnings | 8 | 26 | (33)
Cost of Sales [Member] | Cash Flow Hedging [Member] | Commodity Contracts [Member] |  |  |
Derivative [Line Items] |  |  |
Gain/(Loss) Recognized in Earnings | (24) | (18) | (12)
Cost of Sales [Member] | Fair Value Hedging [Member] | Commodity Contracts [Member] |  |  |
Derivative [Line Items] |  |  |
Gain/(Loss) Recognized in Earnings | 135 | 42 | 12
Cost of Sales [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] |  |  |
Derivative [Line Items] |  |  |
Gain/(Loss) Recognized in Earnings | (103) | 2 | (33)
Interest Expense [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member] |  |  |
Derivative [Line Items] |  |  |
Gain/(Loss) Recognized in Earnings | (6) | (1) | 0
Other Nonoperating Income (Expense) [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |  |
Derivative [Line Items] |  |  |
Gain/(Loss) Recognized in Earnings | $ (5) | $ 8 | $ (3)

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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994 + Details
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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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