Other Balance Sheet Items - Schedule of Accounts Receivable (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 85.0	$ 87.2
Allowance for credit losses	(5.5)	(5.7)
Accounts receivable, net	79.5	81.5
Trade receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	33.8	12.5
Simulcast and online wagering receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	34.6	54.1
Other receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 16.6	$ 20.6