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Long-Term Debt - Composition of Long-Term Debt (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Debt Instrument [Line Items]    
Long-term debt $ 3,882.4 $ 3,901.3
Less unamortized original issue discount and debt issuance costs (62.1) (70.2)
Less: current portion of long-term debt (18.0) (18.2)
Long-term debt, net of current portion 3,802.3 3,812.9
2027 Term Loans | Secured Debt    
Debt Instrument [Line Items]    
Long-term debt $ 725.6 $ 731.3
Effective interest rate percentage 7.30% 4.30%
2029 Term Loans | Secured Debt    
Debt Instrument [Line Items]    
Long-term debt $ 1,756.8 $ 1,770.0
Effective interest rate percentage 8.40% 4.10%
2027 Senior Notes | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt $ 600.0 $ 600.0
Effective interest rate percentage 5.50% 5.40%
2029 Senior Notes | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt $ 800.0 $ 800.0
Effective interest rate percentage 3.60% 3.60%
Revolver | Line of Credit | Revolving Credit Facility    
Debt Instrument [Line Items]    
Long-term debt $ 0.0 $ 0.0