Other Balance Sheet Items - Schedule of Accounts Receivable (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 108.2	$ 87.2
Allowance for credit losses	(6.0)	(5.7)
Accounts receivable, net	102.2	81.5
Trade receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	36.0	12.5
Simulcast and online wagering receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	47.3	54.1
Other receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 24.9	$ 20.6