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)

Cash Flow Hedge Gain (Loss) to be Reclassified Over Life of Forecasted Fixed-Rate Debt

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- Definition

Maximum Length Of Time Hedged Anticipated Transactions

+ References

No definition available.

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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

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-Publisher FASB
-Name Accounting Standards Codification
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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

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Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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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.

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Interest and debt related expenses associated with nonoperating financing activities of the entity.

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- Definition

Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount of income (expense) related to nonoperating activities, classified as other.

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