Supplemental Balance Sheet Information - Schedule of Accounts Receivable (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 142.0	$ 111.9
Allowance for credit losses	(5.9)	(5.0)
Accounts receivable, net	136.1	106.9
Trade receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	56.8	42.6
Simulcast and online wagering receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	54.6	44.9
Other receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 30.6	$ 24.4