Consolidated Statements of Comprehensive Income (Loss) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net revenue:
Total net revenue	$ 1,809.8	$ 1,597.2	$ 1,054.0
Operating expense:
Selling, general and administrative expense	164.2	138.5	114.8
Asset impairments	38.3	15.3	17.5
Transaction expense	42.1	7.9	1.0
Total operating expense	1,488.0	1,312.8	993.8
Operating income	321.8	284.4	60.2
Other income (expense):
Interest expense, net	(147.3)	(84.7)	(80.0)
Equity in income of unconsolidated affiliates	152.7	143.2	27.7
Gain on Calder land sale	274.6	0.0	0.0
Miscellaneous, net	7.0	0.7	0.1
Total other income (expense)	287.0	59.2	(52.2)
Income from continuing operations before provision for income taxes	608.8	343.6	8.0
Income tax (provision) benefit	(169.4)	(94.5)	5.3
Income from continued operations, net of tax	439.4	249.1	13.3
Loss from discontinued operations, net of tax	0.0	0.0	(95.4)
Net income (loss)	439.4	249.1	(82.1)
Net loss attributable to noncontrolling interest	0.0	0.0	(0.2)
Net income (loss) and comprehensive income (loss) attributable to Churchill Downs Incorporated	$ 439.4	$ 249.1	$ (81.9)
Net income (loss) per common share data - basic:
Continuing operations (in dollars per share)	$ 11.58	$ 6.45	$ 0.34
Discontinued operations (in dollars per share)	0	0	(2.41)
Net income (loss) per common share - basic (in dollars per share)	11.58	6.45	(2.07)
Net income (loss) per common share data - diluted:
Continuing operations (in dollars per share)	11.42	6.35	0.33
Discontinued operations (in dollars per share)	0	0	(2.41)
Net income (loss) per common share - diluted (in dollars per share)	$ 11.42	$ 6.35	$ (2.08)
Weighted average shares outstanding:
Basic (in shares)	37.9	38.6	39.6
Diluted (in shares)	38.5	39.2	40.1
Gain on Calder land sale	$ 274.6	$ 0.0	$ 0.0
Live and Historical Racing
Net revenue:
Total net revenue	614.6	409.1	169.6
Operating expense:
Operating expense	400.9	288.9	179.0
TwinSpires
Net revenue:
Total net revenue	436.4	451.4	430.1
Operating expense:
Operating expense	293.6	345.8	293.1
Gaming
Net revenue:
Total net revenue	755.9	695.4	435.3
Operating expense:
Operating expense	537.9	476.3	357.9
All Other
Net revenue:
Total net revenue	2.9	41.3	19.0
Operating expense:
Operating expense	$ 11.0	$ 40.1	$ 30.5