Short-term Debt	6 Months Ended
Mar. 31, 2014
Debt Disclosure [Abstract]
Short-term Debt	Short-term Debt Our short-term debt obligations are primarily comprised of commercial paper borrowings. Commercial paper borrowings outstanding were $342.0 million at March 31, 2014 and $179.0 million at September 30, 2013. At March 31, 2014, the weighted average interest rate and maturity period of the commercial paper outstanding were 0.17 percent and fifteen days, respectively. At September 30, 2013, the weighted average interest rate and maturity period of the commercial paper outstanding were 0.17 percent and five days, respectively.

Short-term Debt

6 Months Ended

Mar. 31, 2014

Our short-term debt obligations are primarily comprised of commercial paper borrowings. Commercial paper borrowings outstanding were $342.0 million at March 31, 2014 and $179.0 million at September 30, 2013. At March 31, 2014, the weighted average interest rate and maturity period of the commercial paper outstanding were 0.17 percent and fifteen days, respectively. At September 30, 2013, the weighted average interest rate and maturity period of the commercial paper outstanding were 0.17 percent and five days, respectively.