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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) 3  (16) 
Foreign currency
Sales
(1) (1) (3) (3) (1) (8) (2) (5) 
Foreign currency
Cost of sales
5  4  9  11  23  (66) 12  (49) 
Foreign currency
Other deductions, net
29  13  40  21  
Net Investment Hedges
Euro denominated debt6  57  6  31  
     Total $30  15  $40  25  38  (40) 19  (39)