Amount classified as assets attributable to disposal group held for sale or disposed of.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Discontinued Operations - Additional Information (Details) $ in Millions	Mar. 25, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 17, 2022 USD ($) a	Dec. 31, 2021 USD ($)	Sep. 29, 2021 USD ($) a
Kater And Thimmegowda Litigation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Litigation settlement	$ 124.0
Arlington Property \| Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Area of land \| a					326
Purchase price					$ 197.2
Arlington International Racecourse \| Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset held for sale		$ 82.9		$ 81.5
Calder Property \| Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Area of land \| a			115.7
Purchase price			$ 291.0
Asset held for sale			$ 4.4