Other Balance Sheet Items - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Receivables [Abstract]
Account wagering deposits liability	$ 47.5	$ 38.1
Accrued salaries and related benefits	39.9	19.6
Purses payable	28.6	18.5
Accrued interest	23.9	19.2
Other	92.7	72.4
Total	$ 232.6	$ 167.8