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Long-Term Debt (Tables)
12 Months Ended
Sep. 30, 2021
Debt Disclosure [Abstract]  
Long-term Debt
September 30,
20212020
Term B Facility$609.9 $673.7 
Revolving Credit Facility— 30.0 
609.9 703.7 
Less: Current portion of long-term debt116.3 63.8 
Debt issuance costs, net4.7 6.6 
Unamortized discount7.7 10.7 
Long-term debt$481.2 $622.6 
Schedule of Maturities of Long-term Debt
Fiscal 2022$116.3 
Fiscal 202335.0 
Fiscal 202435.0 
Fiscal 2025423.6 
Fiscal 2026—