Condensed Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net revenue:
Net revenue	$ 628.5	$ 572.5	$ 2,110.1	$ 1,900.5
Operating expense:
Selling, general and administrative expense	59.8	50.2	172.0	150.6
Asset impairments	3.9	0.0	3.9	24.5
Transaction expense, net	(4.0)	1.5	0.7	1.8
Total operating expense	502.6	460.2	1,527.9	1,442.7
Operating income	125.9	112.3	582.2	457.8
Other (expense) income:
Interest expense, net	(73.1)	(67.9)	(217.0)	(197.8)
Equity in income of unconsolidated affiliates	33.4	33.3	108.9	110.4
Gain on sale of Arlington	0.0	0.0	0.0	114.0
Miscellaneous, net	(0.1)	4.1	8.1	5.5
Total other (expense) income	(39.8)	(30.5)	(100.0)	32.1
Income from operations before provision for income taxes	86.1	81.8	482.2	489.9
Income tax provision	(19.9)	(20.8)	(125.4)	(130.2)
Net income	66.2	61.0	356.8	359.7
Net income attributable to noncontrolling interest	0.8	0.0	1.7	0.0
Net income attributable to Churchill Downs Incorporated	$ 65.4	$ 61.0	$ 355.1	$ 359.7
Net income attributable to Churchill Downs Incorporated per common share data:
Basic net income (in dollars per share)	$ 0.87	$ 0.81	$ 4.78	$ 4.78
Diluted net income (in dollars per share)	$ 0.86	$ 0.79	$ 4.73	$ 4.69
Weighted average shares outstanding:
Basic (in shares)	73,900	75,200	74,000	75,300
Diluted (in shares)	74,600	77,100	74,600	76,700
Live and Historical Racing
Net revenue:
Net revenue	$ 247.5	$ 219.5	$ 957.3	$ 818.9
Operating expense:
Operating expense	171.3	158.2	549.9	505.7
TwinSpires
Net revenue:
Net revenue	111.3	108.5	369.6	340.7
Operating expense:
Operating expense	72.3	73.4	229.5	219.8
Gaming
Net revenue:
Net revenue	269.7	244.3	783.1	740.2
Operating expense:
Operating expense	194.8	175.6	561.7	528.3
All Other
Net revenue:
Net revenue	0.0	0.2	0.1	0.7
Operating expense:
Operating expense	$ 4.5	$ 1.3	$ 10.2	$ 12.0