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Derivative Financial Instruments (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 02, 2021
Oct. 03, 2020
Sep. 28, 2019
Derivative [Line Items]      
Maximum Length Of Time Hedged Anticipated Transactions 18 months    
Cost of Sales $ 40,523 $ 37,801 $ 37,383
Interest and Debt Expense 428 485 462
Other Nonoperating Income (Expense) 65 131 55
Treasury Lock [Member]      
Derivative [Line Items]      
Cash Flow Hedge Gain (Loss) to be Reclassified Over Life of Forecasted Fixed-Rate Debt (15)    
Cash Flow Hedging [Member]      
Derivative [Line Items]      
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax     (39)
Cash Flow Hedging [Member] | Commodity Contracts [Member]      
Derivative [Line Items]      
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax     (15)
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     (24)
Fair Value Hedging [Member]      
Derivative [Line Items]      
Derivative Assets (Liabilities), at Fair Value, Net (6) 6 (19)
Sales [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member]      
Derivative [Line Items]      
Gain/(Loss) Recognized in Earnings 0 0 (23)
Cost of Sales [Member]      
Derivative [Line Items]      
Gain/(Loss) Recognized in Earnings 14 8 26
Cost of Sales [Member] | Cash Flow Hedging [Member] | Commodity Contracts [Member]      
Derivative [Line Items]      
Gain/(Loss) Recognized in Earnings (1) (24) (18)
Cost of Sales [Member] | Fair Value Hedging [Member] | Commodity Contracts [Member]      
Derivative [Line Items]      
Gain/(Loss) Recognized in Earnings (55) 135 42
Cost of Sales [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member]      
Derivative [Line Items]      
Gain/(Loss) Recognized in Earnings 70 (103) 2
Interest Expense [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member]      
Derivative [Line Items]      
Gain/(Loss) Recognized in Earnings (1) (6) (1)
Other Nonoperating Income (Expense) [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]      
Derivative [Line Items]      
Gain/(Loss) Recognized in Earnings $ (5) $ (5) $ 8