Condensed Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net revenue:
Net revenue	$ 890.7	$ 768.5	$ 1,481.6	$ 1,328.0
Operating expense:
Selling, general and administrative expense	57.4	48.1	112.2	100.4
Asset impairments	0.0	24.5	0.0	24.5
Transaction expense, net	0.6	0.5	4.7	0.3
Total operating expense	560.7	542.9	1,025.3	982.5
Operating income	330.0	225.6	456.3	345.5
Other (expense) income:
Interest expense, net	(73.5)	(65.2)	(143.9)	(129.9)
Equity in income of unconsolidated affiliates	37.7	38.8	75.5	77.1
Gain on sale of Arlington	0.0	0.0	0.0	114.0
Miscellaneous, net	0.1	0.0	8.2	1.4
Total other (expense) income	(35.7)	(26.4)	(60.2)	62.6
Income from operations before provision for income taxes	294.3	199.2	396.1	408.1
Income tax provision	(84.1)	(56.2)	(105.5)	(109.4)
Net income	210.2	143.0	290.6	298.7
Net income attributable to noncontrolling interest	0.9	0.0	0.9	0.0
Net income attributable to Churchill Downs Incorporated	$ 209.3	$ 143.0	$ 289.7	$ 298.7
Net income attributable to Churchill Downs Incorporated per common share data:
Basic net income (in dollars per share)	$ 2.82	$ 1.90	$ 3.90	$ 3.97
Diluted net income (in dollars per share)	$ 2.79	$ 1.86	$ 3.87	$ 3.90
Weighted average shares outstanding:
Basic (in shares)	73,900	75,300	74,000	75,300
Diluted (in shares)	74,600	76,900	74,600	76,500
Live and Historical Racing
Net revenue:
Net revenue	$ 464.7	$ 385.0	$ 709.8	$ 599.4
Operating expense:
Operating expense	221.4	204.2	378.6	347.5
TwinSpires
Net revenue:
Net revenue	151.7	137.4	258.3	232.2
Operating expense:
Operating expense	89.3	80.7	157.2	146.4
Gaming
Net revenue:
Net revenue	274.2	245.9	513.4	495.9
Operating expense:
Operating expense	188.4	179.2	366.9	352.7
All Other
Net revenue:
Net revenue	0.1	0.2	0.1	0.5
Operating expense:
Operating expense	$ 3.6	$ 5.7	$ 5.7	$ 10.7