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Derivative Financial Instruments (Pretax Impact Of Undesignated Derivative Instruments On The Consolidated Statements Of Income) (Details) - Undesignated - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 30, 2019
Mar. 31, 2018
Mar. 30, 2019
Mar. 31, 2018
Derivative [Line Items]        
Gain/(Loss) Recognized in Earnings $ (8) $ 36 $ (4) $ 23
Commodity contracts | Sales        
Derivative [Line Items]        
Gain/(Loss) Recognized in Earnings 13 (30) 14 (21)
Commodity contracts | Cost of Sales        
Derivative [Line Items]        
Gain/(Loss) Recognized in Earnings (24) 68 (21) 46
Foreign exchange contracts | Other income/expense        
Derivative [Line Items]        
Gain/(Loss) Recognized in Earnings $ 3 $ (2) $ 3 $ (2)