Other Balance Sheet Items - Schedule of Accounts Receivable (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Accounts Receivable, Net, Current [Abstract]
Accounts receivable, gross	$ 47.7	$ 41.4
Allowance for doubtful accounts	(5.4)	(4.9)
Accounts receivable, net	42.3	36.5
Trade receivables
Accounts Receivable, Net, Current [Abstract]
Accounts receivable, gross	7.6	6.5
Simulcast and online wagering receivables
Accounts Receivable, Net, Current [Abstract]
Accounts receivable, gross	29.6	26.7
Other receivables
Accounts Receivable, Net, Current [Abstract]
Accounts receivable, gross	$ 10.5	$ 8.2

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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