Condensed Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net revenue:
Net revenue	$ 572.5	$ 383.1	$ 1,900.5	$ 1,329.7
Operating expense:
Selling, general and administrative expense	50.2	38.4	150.6	112.7
Asset impairments	0.0	0.0	24.5	4.9
Transaction expense, net	1.5	1.2	1.8	7.4
Total operating expense	460.2	320.1	1,442.7	1,019.6
Operating income	112.3	63.0	457.8	310.1
Other (expense) income:
Interest expense, net	(67.9)	(36.2)	(197.8)	(92.6)
Equity in income of unconsolidated affiliates	33.3	42.4	110.4	115.4
Gain on sale of assets	0.0	0.0	114.0	274.6
Miscellaneous, net	4.1	4.2	5.5	4.4
Total other (expense) income	(30.5)	10.4	32.1	301.8
Income from operations before provision for income taxes	81.8	73.4	489.9	611.9
Income tax provision	(20.8)	(16.4)	(130.2)	(173.5)
Net income	$ 61.0	$ 57.0	$ 359.7	$ 438.4
Net income per common share data:
Basic net income (in dollars per share)	$ 0.81	$ 0.75	$ 4.78	$ 5.76
Diluted net income (in dollars per share)	$ 0.79	$ 0.74	$ 4.69	$ 5.68
Weighted average shares outstanding:
Basic (in shares)	75,200	75,600	75,300	76,100
Diluted (in shares)	77,100	76,700	76,700	77,200
Live and Historical Racing
Net revenue:
Net revenue	$ 219.5	$ 92.3	$ 818.9	$ 439.2
Operating expense:
Operating expense	158.2	80.1	505.7	269.2
TwinSpires
Net revenue:
Net revenue	108.5	106.2	340.7	343.3
Operating expense:
Operating expense	73.4	64.5	219.8	229.6
Gaming
Net revenue:
Net revenue	244.3	183.4	740.2	545.0
Operating expense:
Operating expense	175.6	133.0	528.3	387.0
All Other
Net revenue:
Net revenue	0.2	1.2	0.7	2.2
Operating expense:
Operating expense	$ 1.3	$ 2.9	$ 12.0	$ 8.8