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Basis of Presentation and Summary of Significant Accounting Policies - Fair Value of Financial Instruments (Details) - Level 2 - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Face Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fixed rate senior secured notes $ 1,094.0 $ 1,247.0
Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fixed rate senior secured notes $ 1,085.8 $ 1,167.0