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Borrowing Arrangements (Tables)
6 Months Ended
Mar. 31, 2020
Long-term Debt and Lease Obligation [Abstract]  
Components of Long-Term Debt
The components of our long-term debt are presented below.
 March 31,September 30,
 20202019
 (in millions)
5.5% Senior Notes$450.0  $450.0  
ABL Agreement—  —  
Finance leases2.6  2.1  
452.6  452.1  
Less deferred financing costs5.3  5.8  
Less current portion1.1  0.9  
Long-term debt$446.2  $445.4