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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
Dec. 29, 2018
Dec. 30, 2017
Derivative [Line Items]    
Gain/(Loss) Recognized in OCI on Derivatives $ (20) $ (2)
Gain/(Loss) Reclassified from OCI to Earnings (7) (1)
Commodity contracts    
Derivative [Line Items]    
Gain/(Loss) Recognized in OCI on Derivatives (2) (2)
Commodity contracts | Cost of Sales    
Derivative [Line Items]    
Gain/(Loss) Reclassified from OCI to Earnings (7) (1)
Interest Rate Contract [Member]    
Derivative [Line Items]    
Gain/(Loss) Recognized in OCI on Derivatives (18) 0
Interest Rate Contract [Member] | Interest Expense [Member]    
Derivative [Line Items]    
Gain/(Loss) Reclassified from OCI to Earnings $ 0 $ 0