v3.24.1.u1
Long-Term Debt - Third Incremental Term Loan (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2024
Mar. 31, 2023
Nov. 18, 2022
Debt Instrument          
Gross Exchanges of Long-term debt $ 0.0 $ 0.0 $ 0.0 $ 99.9  
Gross Repayments of Long-term debt $ 1,185.6 $ 50.6 $ 1,256.5 151.7  
Third Incremental Term Loan | Term Loan          
Debt Instrument          
Loans Payable to Bank         $ 130.0
Gross Exchanges of Long-term debt       99.9  
Gross Repayments of Long-term debt       $ 30.1