Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Account wagering deposits liability	$ 53.4	$ 38.1
Purses payable	38.1	18.5
Accrued salaries and related benefits	28.0	19.6
Accrued interest	23.9	19.2
Other	84.0	72.4
Total	$ 227.4	$ 167.8