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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. 28, 2019
Dec. 29, 2018
Derivative [Line Items]    
Gain/(Loss) Recognized in OCI on Derivatives $ 0 $ (20)
Commodity contracts    
Derivative [Line Items]    
Gain/(Loss) Recognized in OCI on Derivatives 0 (2)
Interest rate hedges    
Derivative [Line Items]    
Gain/(Loss) Recognized in OCI on Derivatives $ 0 $ (18)