Other Balance Sheet Items - Schedule of Accounts Receivable (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Accounts Receivable, Net, Current [Abstract]
Accounts receivable, gross	$ 111.9	$ 87.2
Allowance for credit losses	(5.0)	(5.7)
Total	106.9	81.5
Trade receivables
Accounts Receivable, Net, Current [Abstract]
Accounts receivable, gross	42.6	12.5
Simulcast and online wagering receivables
Accounts Receivable, Net, Current [Abstract]
Accounts receivable, gross	44.9	54.1
Other receivables
Accounts Receivable, Net, Current [Abstract]
Accounts receivable, gross	$ 24.4	$ 20.6