Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2420-110228

Name:	us-gaap_AssetImpairmentCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Asset Impairments (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
Asset Impairments (Details) - USD ($) $ in Millions	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Indefinite-lived Intangible Assets [Line Items]
Asset impairments	$ 0.0		$ 11.2	$ 4.9	$ 11.2
TwinSpires
Indefinite-lived Intangible Assets [Line Items]
Asset impairments		$ 4.9
Live and Historical Racing
Indefinite-lived Intangible Assets [Line Items]
Asset impairments	$ 11.2