Stock-based Compensation Plans - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($) performance_condition performance_criteria	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 3.6	$ 7.2
Number of performance criteria | performance_criteria	2
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Liability classified awards	$ 9.1		$ 25.0
PSUs | Churchill Downs Incorporated 2016 Omnibus Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Number of performance conditions | performance_condition	2
Continuing Operations
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 3.6	$ 7.2