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Pensions And Other Postretirement Benefits (Reconciliation Of Change In Fair Value Measurement Of Defined Benefit Plans' Consolidated Assets Using Significant Unobservable Inputs) (Details)
$ in Millions
 12 Months Ended
Oct. 01, 2016
USD ($)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]  
Beginning balance $ 1,576
Ending balance 1,440
Insurance Contract [Member]  
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]  
Beginning balance 14 [1]
Ending balance 28 [1]
Level 3 [Member]  
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]  
Beginning balance 14
Assets still held at reporting date 0
Assets sold during the period 0
Purchases, sales and settlements, net 14
Transfers in and/or out of Level 3 0
Ending balance 28
Level 3 [Member] | Insurance Contract [Member]  
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]  
Beginning balance 14 [1]
Assets still held at reporting date 0
Assets sold during the period 0
Purchases, sales and settlements, net 14
Transfers in and/or out of Level 3 0
Ending balance $ 28 [1]
[1] We classify insurance contracts as Level 3 as there is limited activity or less observable inputs into valuation models, including current interest rates and estimated prepayment, default and recovery rates on the underlying portfolio or structured investment vehicle. The insurance contracts are valued using the plan’s own assumptions about the assumptions market participants would use in pricing the assets based on the best information available, such as investment manager pricing. Significant changes to assumptions or unobservable inputs in the valuation of our Level 3 instruments would not have a significant impact to our consolidated financial statements.