Description of Business (Details)	3 Months Ended	9 Months Ended
	Jun. 30, 2021	Sep. 30, 2021 segment	Dec. 31, 2020 property	Jul. 31, 2020 property
Patron Capacity [Line Items]
Number of reportable segments | segment		3
Number of properties temporarily suspended | property			3	1
Churchill Downs Racetrack | Minimum | Live and Historical Racing
Patron Capacity [Line Items]
Patron capacity, percentage	0.40
Churchill Downs Racetrack | Maximum | Live and Historical Racing
Patron Capacity [Line Items]
Patron capacity, percentage	0.60