Condensed Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Net revenue:
Net revenue	$ 768.5	$ 582.5	$ 1,328.0	$ 946.6
Operating expense:
Selling, general and administrative expense	48.1	38.4	100.4	74.3
Asset impairments	24.5	0.0	24.5	4.9
Transaction expense, net	0.5	1.2	0.3	6.2
Total operating expense	542.9	382.8	982.5	699.5
Operating income	225.6	199.7	345.5	247.1
Other (expense) income:
Interest expense, net	(65.2)	(35.1)	(129.9)	(56.4)
Equity in income of unconsolidated affiliates	38.8	40.5	77.1	73.0
Gain on sale of assets	0.0	274.6	114.0	274.6
Miscellaneous, net	0.0	0.2	1.4	0.2
Total other (expense) income	(26.4)	280.2	62.6	291.4
Income from operations before provision for income taxes	199.2	479.9	408.1	538.5
Income tax provision	(56.2)	(140.6)	(109.4)	(157.1)
Net income	$ 143.0	$ 339.3	$ 298.7	$ 381.4
Net income per common share data:
Basic net income (in dollars per share)	$ 1.90	$ 4.45	$ 3.97	$ 4.99
Diluted net income (in dollars per share)	$ 1.86	$ 4.39	$ 3.90	$ 4.92
Weighted average shares outstanding:
Basic (in shares)	75,300	76,200	75,300	76,400
Diluted (in shares)	76,900	77,200	76,500	77,400
Live and Historical
Net revenue:
Net revenue	$ 385.0	$ 260.9	$ 599.4	$ 346.9
Operating expense:
Operating expense	204.2	121.4	347.5	189.1
TwinSpires
Net revenue:
Net revenue	137.4	136.8	232.2	237.1
Operating expense:
Operating expense	80.7	90.2	146.4	165.1
Gaming
Net revenue:
Net revenue	245.9	184.3	495.9	361.6
Operating expense:
Operating expense	179.2	128.8	352.7	254.0
All Other
Net revenue:
Net revenue	0.2	0.5	0.5	1.0
Operating expense:
Operating expense	$ 5.7	$ 2.8	$ 10.7	$ 5.9