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Schedule of Prepaid Expenses and Other Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]      
Prepaid expenses and other assets $ 12.3 $ 8.6  
Unbilled accounts receivable 17.4 8.2 $ 15.3
Total prepaid expenses and other assets $ 29.7 $ 16.8