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Revenue (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Revenue [Line Items]            
Equity method investments $ 5.3 $ 4.6 $ 5.3 $ 4.6 $ 6.8 $ 5.8
Related party revenues 1.7   4.9   2.1  
Contract liability   1.2   1.2    
Operations revenue 0.4 0.4 0.3 0.3    
Contract liability         1.2 2.5
Destinations operations         $ 0.5 $ 0.3
FCG [Member]            
Revenue [Line Items]            
Equity method investments $ 2.0 $ 0.4 $ 2.0 $ 0.4