Pensions And Other Postretirement Benefits (Amounts Recognized in Other Comprehensive Income) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Oct. 01, 2022
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	$ 9	$ 13
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax	(5)	(5)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	4	8
Qualified Plan | Defined Benefit Plan, Funded Plan | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	1	2
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax	0	0
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	1	2
Nonqualified Plan | Defined Benefit Plan, Unfunded Plan | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	(15)	(15)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax	1	2
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	$ (14)	$ (13)