Condensed Consolidated Statements of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net revenue:
Net revenue	$ 383.1	$ 393.0	$ 1,329.7	$ 1,232.4
Operating expense:
Selling, general and administrative expense	38.4	36.1	112.7	99.7
Asset impairments	0.0	0.0	4.9	11.2
Transaction expense, net	1.2	2.0	7.4	2.1
Total operating expense	320.1	325.4	1,019.6	982.7
Operating income	63.0	67.6	310.1	249.7
Other income (expense):
Interest expense, net	(36.2)	(21.7)	(92.6)	(63.1)
Equity in income of unconsolidated affiliates	42.4	41.7	115.4	103.0
Gain on Calder land sale	0.0	0.0	274.6	0.0
Miscellaneous, net	4.2	0.1	4.4	0.3
Total other income	10.4	20.1	301.8	40.2
Income from operations before provision for income taxes	73.4	87.7	611.9	289.9
Income tax provision	(16.4)	(26.3)	(173.5)	(84.1)
Net income	$ 57.0	$ 61.4	$ 438.4	$ 205.8
Net income per common share data:
Basic net income (in dollars per share)	$ 1.51	$ 1.59	$ 11.52	$ 5.31
Diluted net income (in dollars per share)	$ 1.49	$ 1.57	$ 11.36	$ 5.23
Weighted average shares outstanding:
Basic (in shares)	37.8	38.6	38.1	38.7
Diluted (in shares)	38.4	39.2	38.6	39.3
Live and Historical Racing:
Net revenue:
Net revenue	$ 92.3	$ 79.7	$ 439.2	$ 318.8
Operating expense:
Operating expense	80.1	62.3	269.2	217.3
TwinSpires
Net revenue:
Net revenue	106.2	107.5	343.3	351.8
Operating expense:
Operating expense	64.5	83.0	229.6	262.6
Gaming
Net revenue:
Net revenue	183.4	185.3	545.0	523.3
Operating expense:
Operating expense	133.0	127.7	387.0	355.0
All Other
Net revenue:
Net revenue	1.2	20.5	2.2	38.5
Operating expense:
Operating expense	$ 2.9	$ 14.3	$ 8.8	$ 34.8