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Derivative Financial Instruments (Pretax Impact Of Cash Flow Hedge Derivative Instruments On The Consolidated Statements Of Income) (Details) - Cash Flow Hedge [Member] - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Oct. 03, 2015
Derivative [Line Items]      
Gain/(Loss) Recognized in OCI on Derivatives $ (3) $ (1) $ (4)
Gain/(Loss) Reclassified from OCI to Earnings (4) 1 (7)
Commodity Contracts [Member]      
Derivative [Line Items]      
Gain/(Loss) Recognized in OCI on Derivatives (3) (1) (4)
Commodity Contracts [Member] | Cost of Sales [Member]      
Derivative [Line Items]      
Gain/(Loss) Reclassified from OCI to Earnings (4) 1 (7)
Foreign Currency [Member]      
Derivative [Line Items]      
Gain/(Loss) Recognized in OCI on Derivatives 0 0 0
Foreign Currency [Member] | Other Nonoperating Income (Expense) [Member]      
Derivative [Line Items]      
Gain/(Loss) Reclassified from OCI to Earnings $ 0 $ 0 $ 0