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Financial Instruments (Tables)
6 Months Ended
Mar. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule Of Derivative Instruments
Into EarningsInto OCI
2nd QuarterSix Months2nd QuarterSix Months
Gains (Losses)Location2019  2020  2019  2020  2019  2020  2019  2020  
CommodityCost of sales$(3) (1) (6) (4) 10  (23)  (16) 
Foreign currency
Sales
(1) (1) (3) (3) (1) (8) (2) (5) 
Foreign currency
Cost of sales
   11  23  (66) 12  (49) 
Foreign currency
Other deductions, net
29  13  40  21  
Net Investment Hedges
Euro denominated debt 57   31  
     Total $30  15  $40  25  38  (40) 19  (39)