Derivative Financial Instruments (Pretax Impact Of Undesignated Derivative Instruments On The Consolidated Statements Of Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
Cost of Sales [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Earnings	$ 8	$ 26	$ (33)
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Sales [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Earnings	0	(23)	18
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Cost of Sales [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Earnings	$ (103)	$ 2	$ (33)