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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. 28, 2019
Sep. 29, 2018
Sep. 30, 2017
Derivative [Line Items]      
Gain/(Loss) Recognized in OCI on Derivatives $ (39) $ (20) $ (3)
Gain/(Loss) Reclassified from OCI to Earnings (19) (12) (4)
Commodity Contracts [Member]      
Derivative [Line Items]      
Gain/(Loss) Recognized in OCI on Derivatives (15) (21) (3)
Commodity Contracts [Member] | Cost of Sales [Member]      
Derivative [Line Items]      
Gain/(Loss) Reclassified from OCI to Earnings (18) (12) (4)
Interest Rate Swap [Member]      
Derivative [Line Items]      
Gain/(Loss) Recognized in OCI on Derivatives     0
Interest Rate Swap [Member] | Interest Expense [Member]      
Derivative [Line Items]      
Gain/(Loss) Reclassified from OCI to Earnings     $ 0
Interest Rate Contract [Member]      
Derivative [Line Items]      
Gain/(Loss) Recognized in OCI on Derivatives (24) 1  
Interest Rate Contract [Member] | Interest Expense [Member]      
Derivative [Line Items]      
Gain/(Loss) Reclassified from OCI to Earnings $ (1) $ 0