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Derivative Financial Instruments (Pretax Impact Of Fair Value Hedge Derivative Instruments On The Consolidated Statements of Income) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 28, 2020
Mar. 30, 2019
Mar. 28, 2020
Mar. 30, 2019
Sep. 28, 2019
Cost of Sales          
Derivative [Line Items]          
Derivative, Gain (Loss) on Derivative, Net $ (100) $ (28) $ (57) $ (33)  
Fair Value Hedging [Member]          
Derivative [Line Items]          
Derivative Assets (Liabilities), at Fair Value, Net $ (77)   $ (77)   $ (19)