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Short-Term Borrowings And Lines Of Credit (Tables)
12 Months Ended
Sep. 30, 2011
Short-Term Borrowings And Lines Of Credit [Abstract] 
Schedule Of Short-Term Debt And Current Maturities Of Long-Term Debt
   
2010
   
2011
 
Current maturities of long-term debt
  $ 71       279  
Commercial paper
    401       588  
Payable to banks
    8       10  
Total
  $ 480       877  
Weighted-average short-term borrowing interest rate at year end
    0.3 %     0.1 %