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Short-term Debt	9 Months Ended
Short-term Debt	Jun. 30, 2016
Short-term Debt [Abstract]
Short-term Debt	Short-term Debt Our short-term debt obligations primarily consist of commercial paper borrowings. Commercial paper borrowings outstanding were $354.0 million at June 30, 2016. The weighted average interest rate of the commercial paper outstanding was 0.49 percent at June 30, 2016. There were no commercial paper borrowings outstanding at September 30, 2015.