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Pensions And Other Postretirement Benefits Pensions and Other Postretirement Benefits (Amounts Recognized in Other Comprehensive Income) (Details) - USD ($) $ in Millions	Oct. 02, 2021	Oct. 03, 2020
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial (gain) loss	$ 18	$ 24
Prior service (credit) cost	(5)	(37)
Total accumulated other comprehensive (income)/loss	13	(13)
Assets for Plan Benefits, Defined Benefit Plan	0	0
Qualified Plan [Member] | Defined Benefit Plan, Funded Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial (gain) loss	4	4
Prior service (credit) cost	0	0
Total accumulated other comprehensive (income)/loss	4	4
Assets for Plan Benefits, Defined Benefit Plan	5	4
Nonqualified Plan [Member] | Defined Benefit Plan, Unfunded Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial (gain) loss	36	45
Prior service (credit) cost	2	3
Total accumulated other comprehensive (income)/loss	38	48
Assets for Plan Benefits, Defined Benefit Plan	$ 0	$ 0

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