|**Investments in and Advances to Unconsolidated Affiliates (Tables)** | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                   
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|**Investments in and Advances to Affiliates [Abstract]**              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Affiliate Income Statement                                            | Summarized below are the financial results for our unconsolidated affiliates.Three Months Ended September 30,Nine Months Ended September 30,(in millions)2024202320242023Net revenue$208.4$208.9$641.2$648.2Operating and SG&A expense132.2135.1399.3407.3Depreciation and amortization6.85.920.117.5Total operating expense139.0141.0419.4424.8Operating income69.467.9221.8223.4Interest and other, net(11.1)(11.1)(33.5)(32.7)Net income$58.3$56.8$188.3$190.7
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|                                                                      | Three Months Ended September 30,                                                                                                                                                                                                                                                                                                                                                                                                                                 
|(in millions)                                                         | 2024                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|Net revenue                                                           | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                
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|Operating and SG&A expense                                            | 132.2                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|Depreciation and amortization                                         | 6.8                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|Total operating expense                                               | 139.0                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|Operating income                                                      | 69.4                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|Interest and other, net                                               | (11.1)                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Net income                                                            | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Affiliate Balance Sheet                                               | (in millions)September 30, 2024December 31, 2023AssetsCurrent assets$93.9$104.8Property and equipment, net330.7339.4Other assets, net270.1266.1Total assets$694.7$710.3Liabilities and Members' DeficitCurrent liabilities$105.6$106.2Long-term debt844.4847.2Other liabilities0.60.7Members' deficit(255.9)(243.8)Total liabilities and members' deficit$694.7$710.3                                                                                            
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|(in millions)                                                         | September 30, 2024                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Assets                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Current assets                                                        | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Property and equipment, net                                           | 330.7                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|Other assets, net                                                     | 270.1                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|Total assets                                                          | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Liabilities and Members' Deficit                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Current liabilities                                                   | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Long-term debt                                                        | 844.4                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|Other liabilities                                                     | 0.6                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|Members' deficit                                                      | (255.9)                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|Total liabilities and members' deficit                                | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                

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