Condensed Consolidated Statements of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net revenue:
Net revenue	$ 582.5	$ 515.1	$ 946.6	$ 839.4
Operating expense:
Selling, general and administrative expense	38.4	33.4	74.3	63.6
Asset impairments	0.0	11.2	4.9	11.2
Transaction expense, net	1.2	0.0	6.2	0.1
Total operating expense	382.8	379.7	699.5	657.3
Operating income	199.7	135.4	247.1	182.1
Other income (expense):
Interest expense, net	(35.1)	(22.0)	(56.4)	(41.4)
Equity in income of unconsolidated affiliates	40.5	36.4	73.0	61.3
Gain on Calder land sale	274.6	0.0	274.6	0.0
Miscellaneous, net	0.2	0.1	0.2	0.2
Total other income	280.2	14.5	291.4	20.1
Income from operations before provision for income taxes	479.9	149.9	538.5	202.2
Income tax provision	(140.6)	(41.6)	(157.1)	(57.8)
Net income	$ 339.3	$ 108.3	$ 381.4	$ 144.4
Net income per common share data:
Basic net income (in dollars per share)	$ 8.91	$ 2.80	$ 9.98
Diluted net income (in dollars per share)	$ 8.79	$ 2.76	$ 9.85	$ 3.66
Weighted average shares outstanding:
Basic (in shares)	38.1	38.7	38.2	38.8
Diluted (in shares)	38.6	39.3	38.7	39.4
Live and Historical Racing
Net revenue:
Net revenue	$ 260.9	$ 175.9	$ 346.9	$ 239.1
Operating expense:
Operating expense	121.4	100.3	189.1	155.0
TwinSpires
Net revenue:
Net revenue	136.8	140.8	237.1	244.3
Operating expense:
Operating expense	90.2	102.1	165.1	179.6
Gaming
Net revenue:
Net revenue	184.3	186.0	361.6	338.0
Operating expense:
Operating expense	128.8	121.0	254.0	227.3
All Other
Net revenue:
Net revenue	0.5	12.4	1.0	18.0
Operating expense:
Operating expense	$ 2.8	$ 11.7	$ 5.9	$ 20.5