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Long-Term Debt (Tables)
3 Months Ended
Dec. 31, 2022
Debt Disclosure [Abstract]  
Long-term Debt
December 31,
2022
September 30,
2022
7.00% Senior Notes maturing in March 2030$840.0 $840.0 
Revolving Credit Facility114.0 99.0 
Total principal amount of debt954.0 939.0 
Less: Debt issuance costs, net9.2 9.5 
Long-term debt$944.8 $929.5