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Pensions And Other Postretirement Benefits (Plans With Accumulated Benefit Obligations In Excess Of Plan Assets) (Details) - Pension Plan [Member] - USD ($) $ in Millions	Sep. 29, 2018	Sep. 30, 2017
Funded Plan [Member] | Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 49	$ 361
Accumulated benefit obligation	49	361
Fair value of plan assets	45	352
Unfunded Plan [Member] | Nonqualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	220	230
Accumulated benefit obligation	219	220
Fair value of plan assets	$ 0	$ 0

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Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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