Pensions And Other Postretirement Benefits (Amounts Recognized In The Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Oct. 03, 2020	Sep. 28, 2019
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Other assets	$ 0	$ 0
Other current liabilities	(3)	(3)
Other liabilities	(71)	(74)
Total assets (liabilities)	(74)	(77)
Defined Benefit Plan, Funded Plan [Member] | Qualified Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Other assets	(4)	(16)
Other current liabilities	0	0
Other liabilities	0	(17)
Total assets (liabilities)	4	(1)
Defined Benefit Plan, Unfunded Plan [Member] | Nonqualified Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Other assets	0	0
Other current liabilities	(12)	(12)
Other liabilities	(226)	(227)
Total assets (liabilities)	$ (238)	$ (239)