Supplemental Balance Sheet Information - Schedule of Accounts Receivable (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 99.7	$ 111.9
Allowance for credit losses	(6.5)	(5.0)
Accounts receivable, net	93.2	106.9
Trade receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	36.6	42.6
Simulcast and online wagering receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	36.1	44.9
Other receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 27.0	$ 24.4