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Borrowing Arrangements (Tables)
12 Months Ended
Sep. 30, 2021
Long-term Debt and Lease Obligation [Abstract]  
Components of Long-Term Debt
The components of our long-term debt are as follows:
 September 30,
 20212020
 (in millions)
4.0% Senior Notes$450.0 $— 
5.5% Senior Notes— 450.0 
ABL Agreement— — 
Other2.2 2.5 
452.2 452.5 
Less deferred financing costs(5.3)(4.9)
Less current portion of long-term debt(1.0)(1.1)
Long-term debt$445.9 $446.5