Derivative Financial Instruments (Pretax Impact Of Undesignated Derivative Instruments On The Consolidated Statements Of Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Derivative [Line Items]
Cost of Sales	$ 9,867	$ 9,251	$ 19,242	$ 18,089
Other Nonoperating Income (Expense)	(106)	(7)	(122)	(10)
Interest expense	119	119	239	218
Cost of Sales
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(100)	(28)	(57)	(33)
Not Designated as Hedging Instrument | Commodity contracts | Sales
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	13	0	14
Not Designated as Hedging Instrument | Commodity contracts | Cost of Sales
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(126)	(24)	(97)	(21)
Not Designated as Hedging Instrument | Foreign exchange contracts | Other income/expense
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(3)	3	1	3
Fair Value Hedging [Member] | Commodity contracts | Cost of Sales
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	31	1	47	0
Cash Flow Hedging [Member] | Commodity contracts | Cost of Sales
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(5)	(5)	(7)	(12)
Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Interest Expense [Member]
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (1)	$ 0	$ (2)	$ 0