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Long-Term Debt - Estimated Fair Values of Long-Term Debt Instruments (Details) - Level 2
$ in Millions
Sep. 30, 2023
USD ($)
2027 Term Loans | Secured Debt  
Debt Instrument [Line Items]  
Estimated fair value of long-term debt $ 725.6
2029 Term Loans | Secured Debt  
Debt Instrument [Line Items]  
Estimated fair value of long-term debt 1,759.0
2027 Senior Notes | Senior Notes  
Debt Instrument [Line Items]  
Estimated fair value of long-term debt 566.1
2029 Senior Notes | Senior Notes  
Debt Instrument [Line Items]  
Estimated fair value of long-term debt $ 673.2