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Short-Term and Long-Term Debt (Tables)
9 Months Ended
Jun. 30, 2022
Debt Disclosure [Abstract]  
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments
The following table presents the carrying amounts and estimated fair values of Long-term debt in the Consolidated Balance Sheet (in millions):
 June 30, 2022September 30, 2021
 Carrying ValueFair ValueCarrying ValueFair Value
Long-term debt$3,464.1 $3,232.2 $3,464.6 $3,874.8