Other Balance Sheet Items - Schedule of Accounts Receivable (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 120.3	$ 111.9
Allowance for credit losses	(5.3)	(5.0)
Accounts receivable, net	115.0	106.9
Trade receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	35.2	42.6
Simulcast and online wagering receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	49.4	44.9
Other receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 35.7	$ 24.4