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Derivative Financial Instruments (Pretax Impact Of Cash Flow Hedge Derivative Instruments On The Consolidated Statements Of Income) (Details) - Cash Flow Hedging [Member] - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Mar. 31, 2018
Apr. 01, 2017
Derivative [Line Items]        
Gain/(Loss) Recognized in OCI on Derivatives $ 2 $ (1) $ 0 $ 0
Gain/(Loss) Reclassified from OCI to Earnings (2) 3 (3) (1)
Commodity contracts        
Derivative [Line Items]        
Gain/(Loss) Recognized in OCI on Derivatives 2 (1) 0 0
Commodity contracts | Cost of Sales        
Derivative [Line Items]        
Gain/(Loss) Reclassified from OCI to Earnings (2) 3 (3) (1)
Foreign exchange contracts        
Derivative [Line Items]        
Gain/(Loss) Recognized in OCI on Derivatives 0 0 0 0
Foreign exchange contracts | Other income/expense        
Derivative [Line Items]        
Gain/(Loss) Reclassified from OCI to Earnings $ 0 $ 0 $ 0 $ 0