Stock-based Compensation Plans - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) performanceCriteria performanceCondition	Mar. 31, 2023 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 7.2	$ 8.6
Number of performance criteria | performanceCriteria	2
Performance Shares (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 | performanceCondition	2
Continuing Operations
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 7.2	$ 8.6