Description of Business - Additional Information (Details) $ in Millions	1 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2020 USD ($) property	Jul. 31, 2020 property	Jun. 30, 2021	Dec. 31, 2021 slot_machine venue sportsbook historical_racing_machine	Dec. 31, 2021 numberOfTableGames	Dec. 31, 2021 USD ($)	Dec. 31, 2021 game	Dec. 31, 2021 state
Patron Capacity [Line Items]
Number of pari-mutuel gaming entertainment venues | venue				3
Historical racing machines | historical_racing_machine				3,050
Number of retail sportbooks | sportsbook				9
Number of states in which entity operates | state								8
Number of slot machines | slot_machine				11,000
Number of table games					200		200
Number of properties temporarily suspended | property	3	1
Employee retention tax credit received, CARES Act	$ 2.7
Deferred tax liability, CARES Act	$ 5.3					$ 5.3
Live and Historical Racing | Churchill Downs Racetrack | Minimum
Patron Capacity [Line Items]
Patron capacity percentage			0.40
Live and Historical Racing | Churchill Downs Racetrack | Maximum
Patron Capacity [Line Items]
Patron capacity percentage			0.60