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Revenue and Contract Balances - Schedule of Contract Balances (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]        
Accounts receivable $ 7.4 $ 8.6    
Allowances (credit losses and doubtful accounts) (2.9) (2.5) $ (0.8) $ (2.6)
Accounts receivable, net of allowance for credit losses and allowance for doubtful accounts 4.5 6.1    
Variable consideration 62.0 62.0    
Prepaid rent 5.0 4.4    
Other deferred revenue 3.4 2.4    
Deferred revenue $ 70.4 $ 68.8